二、MyBatis-逆向工程
MyBatis Generator 简介
• 简称MBG，是一个专门为MyBatis框架使用者定 制的代码生成器，可以快速的根据表生成对应的 映射文件，接口，以及bean类。支持基本的增删 改查，以及QBC风格的条件查询。但是表连接、 存储过程等这些复杂sql的定义需要我们手工编写
• 官方文档地址 http://www.mybatis.org/generator/
• 官方工程地址 https://github.com/mybatis/generator/releases
正文
2.1创建数据库
CREATE SCHEMA `ssm_crud` ;
创建部门表
CREATE TABLE `tbl_dept` (
`dept_id` int(11) NOT NULL AUTO_INCREMENT,
`dept_name` varchar(45) DEFAULT NULL,
PRIMARY KEY (`dept_id`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;
创建员工表
CREATE TABLE `tbl_emp` (
`emp_id` int(11) NOT NULL AUTO_INCREMENT,
`emp_name` varchar(225) DEFAULT NULL,
`gender` char(1) DEFAULT NULL,
`email` varchar(45) DEFAULT NULL,
`d_id` int(11) NOT NULL,
PRIMARY KEY (`emp_id`),
KEY `fk_emp_dept_idx` (`d_id`),
CONSTRAINT `fk_emp_dept` FOREIGN KEY (`d_id`) REFERENCES `tbl_dept` (`dept_id`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=InnoDB AUTO_INCREMENT=2610 DEFAULT CHARSET=utf8;
注意：这里创建了一个外键d_id与tbl_emp的dept_id关联起来
AUTO_INCREMENT=2610 代表自增的初始值
数据库创建就到这
2.2在resources 下创建mgb.xml配置文件：
这里每一个配置都有解释认真看下面内容即可在这不做说明，加入如下内容：
前面写过一遍mgb.xml,这里再复习一下
->mgb.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<!--一定要手动加jar包 否则会报错-->
<classPathEntry location="D:\\DataSource\\mysql-connector-java-5.1.7-bin.jar"/>
<context id="DB2Tables" targetRuntime="MyBatis3">
<!-- 不生成注释 -->
<commentGenerator>
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!-- 配置数据库连接 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/ssm_crud" userId="root"
password="123456">
</jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- 指定javaBean生成的位置 -->
<javaModelGenerator targetPackage="com.atguigu.crud.bean"
targetProject=".\src\main\java">
<property name="enableSubPackages" value="true" />
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!--指定sql映射文件生成的位置 -->
<sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources">
<property name="enableSubPackages" value="true" />
</sqlMapGenerator>
<!-- 指定dao接口生成的位置，mapper接口 -->
<javaClientGenerator type="XMLMAPPER"
targetPackage="com.atguigu.crud.dao" targetProject=".\src\main\java">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<!-- table指定每个表的生成策略tableName数据库表名
domainObjectName生成bean的名字 -->
<table tableName="tbl_emp" domainObjectName="Employee"></table>
<table tableName="tbl_dept" domainObjectName="Department"></table>
</context>
</generatorConfiguration>
注意：自己在resources下创建一名叫mapper的文件夹
注意：如果不另外引入jar包的话等一下项目跑出来会报错
不引入将报如下错误：
Failed to execute goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.2:generate (default-cli) on project MyBatisGenerator: Execution default-cli of goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.2:generate failed: Exception getting JDBC Driver: com.mysql.jdbc.Driver -> [Help 1]
2.3在pom.xml配置文件中加入如下内容：
<build>
<finalName>mybatis_generator</finalName>
<plugins>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<configuration>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
</plugin>
</plugins>
</build>
加入如下内容后旁边maven工具会出现一个执行命令
到这算配置完了就差运行结果了：
先上张没有运行的目录图
注意：由于我的疏忽建多了一个beans 删掉beans 修改generatorConfig.xml配置文件生成java bean的路径改为cn.hfbin.crud.bean ，上面generatorConfig.xml配置文件我已经改好了直接复制即可
红色框出来的需要自己建好！！
好下面就开始运行了
运行结果如下：
注意：由于我的疏忽建多了一个beans generatorConfig.xml配置文件生成java bean的路径改为cn.hfbin.crud.bean , 上面generatorConfig.xml配置文件我已经改好了直接复制即可 ,修改后 ,后面运行生成的文件将会在cn.hfbin.crud.bean包下!!!
看到bean包跟dao包都多了java文件，以及resources下mapper也多xml文件
说明我们的逆向工程运行成功。
好 !!! 到这我们打开一个xml文件看看
这里面生成的sql 各种各样（增删改查每个都有两个或两个以上）有很多sql或许是我们不想要的，没关系， 如果你觉得你用不到的可以删掉，也可以自己定义自己的sql语句。
2.4MyBatis-逆向工程生成的代码更改
三、SSM实现简单的CRUD之DAO层
mapper xml 中 sql 修改
->DepartmentMapper.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.atguigu.crud.dao.DepartmentMapper">
<resultMap id="BaseResultMap" type="com.atguigu.crud.bean.Department">
<id column="dept_id" jdbcType="INTEGER" property="deptId" />
<result column="dept_name" jdbcType="VARCHAR" property="deptName" />
</resultMap>
<sql id="Example_Where_Clause">
<where>
<foreach collection="oredCriteria" item="criteria" separator="or">
<if test="criteria.valid">
<trim prefix="(" prefixOverrides="and" suffix=")">
<foreach collection="criteria.criteria" item="criterion">
<choose>
<when test="criterion.noValue">
and ${criterion.condition}
</when>
<when test="criterion.singleValue">
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue">
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue">
and ${criterion.condition}
<foreach close=")" collection="criterion.value" item="listItem" open="(" separator=",">
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Update_By_Example_Where_Clause">
<where>
<foreach collection="example.oredCriteria" item="criteria" separator="or">
<if test="criteria.valid">
<trim prefix="(" prefixOverrides="and" suffix=")">
<foreach collection="criteria.criteria" item="criterion">
<choose>
<when test="criterion.noValue">
and ${criterion.condition}
</when>
<when test="criterion.singleValue">
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue">
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue">
and ${criterion.condition}
<foreach close=")" collection="criterion.value" item="listItem" open="(" separator=",">
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Base_Column_List">
dept_id, dept_name
</sql>
<select id="selectByExample" parameterType="com.atguigu.crud.bean.DepartmentExample" resultMap="BaseResultMap">
select
<if test="distinct">
distinct
</if>
<include refid="Base_Column_List" />
from tbl_dept
<if test="_parameter != null">
<include refid="Example_Where_Clause" />
</if>
<if test="orderByClause != null">
order by ${orderByClause}
</if>
</select>
<select id="selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap">
select
<include refid="Base_Column_List" />
from tbl_dept
where dept_id = #{deptId,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
delete from tbl_dept
where dept_id = #{deptId,jdbcType=INTEGER}
</delete>
<delete id="deleteByExample" parameterType="com.atguigu.crud.bean.DepartmentExample">
delete from tbl_dept
<if test="_parameter != null">
<include refid="Example_Where_Clause" />
</if>
</delete>
<insert id="insert" parameterType="com.atguigu.crud.bean.Department">
insert into tbl_dept (dept_id, dept_name)
values (#{deptId,jdbcType=INTEGER}, #{deptName,jdbcType=VARCHAR})
</insert>
<insert id="insertSelective" parameterType="com.atguigu.crud.bean.Department">
insert into tbl_dept
<trim prefix="(" suffix=")" suffixOverrides=",">
<if test="deptId != null">
dept_id,
</if>
<if test="deptName != null">
dept_name,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides=",">
<if test="deptId != null">
#{deptId,jdbcType=INTEGER},
</if>
<if test="deptName != null">
#{deptName,jdbcType=VARCHAR},
</if>
</trim>
</insert>
<select id="countByExample" parameterType="com.atguigu.crud.bean.DepartmentExample" resultType="java.lang.Long">
select count(*) from tbl_dept
<if test="_parameter != null">
<include refid="Example_Where_Clause" />
</if>
</select>
<update id="updateByExampleSelective" parameterType="map">
update tbl_dept
<set>
<if test="record.deptId != null">
dept_id = #{record.deptId,jdbcType=INTEGER},
</if>
<if test="record.deptName != null">
dept_name = #{record.deptName,jdbcType=VARCHAR},
</if>
</set>
<if test="_parameter != null">
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByExample" parameterType="map">
update tbl_dept
set dept_id = #{record.deptId,jdbcType=INTEGER},
dept_name = #{record.deptName,jdbcType=VARCHAR}
<if test="_parameter != null">
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByPrimaryKeySelective" parameterType="com.atguigu.crud.bean.Department">
update tbl_dept
<set>
<if test="deptName != null">
dept_name = #{deptName,jdbcType=VARCHAR},
</if>
</set>
where dept_id = #{deptId,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="com.atguigu.crud.bean.Department">
update tbl_dept
set dept_name = #{deptName,jdbcType=VARCHAR}
where dept_id = #{deptId,jdbcType=INTEGER}
</update>
</mapper>
->EmployeeMapper.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.atguigu.crud.dao.EmployeeMapper">
<resultMap id="BaseResultMap" type="com.atguigu.crud.bean.Employee">
<id column="emp_id" jdbcType="INTEGER" property="empId" />
<result column="emp_name" jdbcType="VARCHAR" property="empName" />
<result column="gender" jdbcType="CHAR" property="gender" />
<result column="email" jdbcType="VARCHAR" property="email" />
<result column="d_id" jdbcType="INTEGER" property="dId" />
</resultMap>
<resultMap type="com.atguigu.crud.bean.Employee" id="WithDeptResultMap">
<id column="emp_id" jdbcType="INTEGER" property="empId" />
<result column="emp_name" jdbcType="VARCHAR" property="empName" />
<result column="gender" jdbcType="CHAR" property="gender" />
<result column="email" jdbcType="VARCHAR" property="email" />
<result column="d_id" jdbcType="INTEGER" property="dId" />
<!-- 指定联合查询出的部门字段的封装 -->
<association property="department" javaType="com.atguigu.crud.bean.Department">
<id column="dept_id" property="deptId"/>
<result column="dept_name" property="deptName"/>
</association>
</resultMap>
<sql id="Example_Where_Clause">
<where>
<foreach collection="oredCriteria" item="criteria" separator="or">
<if test="criteria.valid">
<trim prefix="(" prefixOverrides="and" suffix=")">
<foreach collection="criteria.criteria" item="criterion">
<choose>
<when test="criterion.noValue">
and ${criterion.condition}
</when>
<when test="criterion.singleValue">
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue">
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue">
and ${criterion.condition}
<foreach close=")" collection="criterion.value" item="listItem" open="(" separator=",">
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Update_By_Example_Where_Clause">
<where>
<foreach collection="example.oredCriteria" item="criteria" separator="or">
<if test="criteria.valid">
<trim prefix="(" prefixOverrides="and" suffix=")">
<foreach collection="criteria.criteria" item="criterion">
<choose>
<when test="criterion.noValue">
and ${criterion.condition}
</when>
<when test="criterion.singleValue">
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue">
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue">
and ${criterion.condition}
<foreach close=")" collection="criterion.value" item="listItem" open="(" separator=",">
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Base_Column_List">
emp_id, emp_name, gender, email, d_id
</sql>
<sql id="WithDept_Column_List">
e.emp_id, e.emp_name, e.gender, e.email, e.d_id,d.dept_id,d.dept_name
</sql>
<!-- List<Employee> selectByExampleWithDept(EmployeeExample example);
Employee selectByPrimaryKeyWithDept(Integer empId);
-->
<!-- 查询员工同时带部门信息 -->
<select id="selectByExampleWithDept" resultMap="WithDeptResultMap">
select
<if test="distinct">
distinct
</if>
<include refid="WithDept_Column_List" />
FROM tbl_emp e
left join tbl_dept d on e.`d_id`=d.`dept_id`
<if test="_parameter != null">
<include refid="Example_Where_Clause" />
</if>
<if test="orderByClause != null">
order by ${orderByClause}
</if>
</select>
<select id="selectByPrimaryKeyWithDept" resultMap="WithDeptResultMap">
select
<include refid="WithDept_Column_List" />
FROM tbl_emp e
left join tbl_dept d on e.`d_id`=d.`dept_id`
where emp_id = #{empId,jdbcType=INTEGER}
</select>
<!-- 查询员工不带部门信息的 -->
<select id="selectByExample" parameterType="com.atguigu.crud.bean.EmployeeExample" resultMap="BaseResultMap">
select
<if test="distinct">
distinct
</if>
<include refid="Base_Column_List" />
from tbl_emp
<if test="_parameter != null">
<include refid="Example_Where_Clause" />
</if>
<if test="orderByClause != null">
order by ${orderByClause}
</if>
</select>
<select id="selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap">
select
<include refid="Base_Column_List" />
from tbl_emp
where emp_id = #{empId,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
delete from tbl_emp
where emp_id = #{empId,jdbcType=INTEGER}
</delete>
<delete id="deleteByExample" parameterType="com.atguigu.crud.bean.EmployeeExample">
delete from tbl_emp
<if test="_parameter != null">
<include refid="Example_Where_Clause" />
</if>
</delete>
<insert id="insert" parameterType="com.atguigu.crud.bean.Employee">
insert into tbl_emp (emp_id, emp_name, gender,
email, d_id)
values (#{empId,jdbcType=INTEGER}, #{empName,jdbcType=VARCHAR}, #{gender,jdbcType=CHAR},
#{email,jdbcType=VARCHAR}, #{dId,jdbcType=INTEGER})
</insert>
<insert id="insertSelective" parameterType="com.atguigu.crud.bean.Employee">
insert into tbl_emp
<trim prefix="(" suffix=")" suffixOverrides=",">
<if test="empId != null">
emp_id,
</if>
<if test="empName != null">
emp_name,
</if>
<if test="gender != null">
gender,
</if>
<if test="email != null">
email,
</if>
<if test="dId != null">
d_id,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides=",">
<if test="empId != null">
#{empId,jdbcType=INTEGER},
</if>
<if test="empName != null">
#{empName,jdbcType=VARCHAR},
</if>
<if test="gender != null">
#{gender,jdbcType=CHAR},
</if>
<if test="email != null">
#{email,jdbcType=VARCHAR},
</if>
<if test="dId != null">
#{dId,jdbcType=INTEGER},
</if>
</trim>
</insert>
<select id="countByExample" parameterType="com.atguigu.crud.bean.EmployeeExample" resultType="java.lang.Long">
select count(*) from tbl_emp
<if test="_parameter != null">
<include refid="Example_Where_Clause" />
</if>
</select>
<update id="updateByExampleSelective" parameterType="map">
update tbl_emp
<set>
<if test="record.empId != null">
emp_id = #{record.empId,jdbcType=INTEGER},
</if>
<if test="record.empName != null">
emp_name = #{record.empName,jdbcType=VARCHAR},
</if>
<if test="record.gender != null">
gender = #{record.gender,jdbcType=CHAR},
</if>
<if test="record.email != null">
email = #{record.email,jdbcType=VARCHAR},
</if>
<if test="record.dId != null">
d_id = #{record.dId,jdbcType=INTEGER},
</if>
</set>
<if test="_parameter != null">
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByExample" parameterType="map">
update tbl_emp
set emp_id = #{record.empId,jdbcType=INTEGER},
emp_name = #{record.empName,jdbcType=VARCHAR},
gender = #{record.gender,jdbcType=CHAR},
email = #{record.email,jdbcType=VARCHAR},
d_id = #{record.dId,jdbcType=INTEGER}
<if test="_parameter != null">
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByPrimaryKeySelective" parameterType="com.atguigu.crud.bean.Employee">
update tbl_emp
<set>
<if test="empName != null">
emp_name = #{empName,jdbcType=VARCHAR},
</if>
<if test="gender != null">
gender = #{gender,jdbcType=CHAR},
</if>
<if test="email != null">
email = #{email,jdbcType=VARCHAR},
</if>
<if test="dId != null">
d_id = #{dId,jdbcType=INTEGER},
</if>
</set>
where emp_id = #{empId,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="com.atguigu.crud.bean.Employee">
update tbl_emp
set emp_name = #{empName,jdbcType=VARCHAR},
gender = #{gender,jdbcType=CHAR},
email = #{email,jdbcType=VARCHAR},
d_id = #{dId,jdbcType=INTEGER}
where emp_id = #{empId,jdbcType=INTEGER}
</update>
</mapper>
dao接口修改
->EmployeeMapper.java
package com.atguigu.crud.dao;
import com.atguigu.crud.bean.Employee;
import com.atguigu.crud.bean.EmployeeExample;
import java.util.List;
import org.apache.ibatis.annotations.Param;
public interface EmployeeMapper {
long countByExample(EmployeeExample example);
int deleteByExample(EmployeeExample example);
int deleteByPrimaryKey(Integer empId);
int insert(Employee record);
int insertSelective(Employee record);
List<Employee> selectByExample(EmployeeExample example);
Employee selectByPrimaryKey(Integer empId);
List<Employee> selectByExampleWithDept(EmployeeExample example);
Employee selectByPrimaryKeyWithDept(Integer empId);
int updateByExampleSelective(@Param("record") Employee record, @Param("example") EmployeeExample example);
int updateByExample(@Param("record") Employee record, @Param("example") EmployeeExample example);
int updateByPrimaryKeySelective(Employee record);
int updateByPrimaryKey(Employee record);
}
->DepartmentMapper.java
package com.atguigu.crud.dao;
import com.atguigu.crud.bean.Department;
import com.atguigu.crud.bean.DepartmentExample;
import java.util.List;
import org.apache.ibatis.annotations.Param;
public interface DepartmentMapper {
long countByExample(DepartmentExample example);
int deleteByExample(DepartmentExample example);
int deleteByPrimaryKey(Integer deptId);
int insert(Department record);
int insertSelective(Department record);
List<Department> selectByExample(DepartmentExample example);
Department selectByPrimaryKey(Integer deptId);
int updateByExampleSelective(@Param("record") Department record, @Param("example") DepartmentExample example);
int updateByExample(@Param("record") Department record, @Param("example") DepartmentExample example);
int updateByPrimaryKeySelective(Department record);
int updateByPrimaryKey(Department record);
}
bean 修改
->Employee.java
package com.atguigu.crud.bean;
import javax.validation.constraints.Pattern;
import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.Length;
public class Employee {
private Integer empId;
@Pattern(regexp="(^[a-zA-Z0-9_-]{6,16}$)|(^[\u2E80-\u9FFF]{2,5})"
,message="用户名必须是2-5位中文或者6-16位英文和数字的组合")
private String empName;
private String gender;
//@Email
@Pattern(regexp="^([a-z0-9_\\.-]+)@([\\da-z\\.-]+)\\.([a-z\\.]{2,6})$",
message="邮箱格式不正确")
private String email;
private Integer dId;
//希望查询员工的同时部门信息也是查询好的
private Department department;
@Override
public String toString() {
return "Employee [empId=" + empId + ", empName=" + empName
+ ", gender=" + gender + ", email=" + email + ", dId=" + dId
+ "]";
}
public Employee() {
super();
}
public Employee(Integer empId, String empName, String gender, String email,
Integer dId) {
super();
this.empId = empId;
this.empName = empName;
this.gender = gender;
this.email = email;
this.dId = dId;
}
public Department getDepartment() {
return department;
}
public void setDepartment(Department department) {
this.department = department;
}
public Integer getEmpId() {
return empId;
}
public void setEmpId(Integer empId) {
this.empId = empId;
}
public String getEmpName() {
return empName;
}
public void setEmpName(String empName) {
this.empName = empName == null ? null : empName.trim();
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender == null ? null : gender.trim();
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email == null ? null : email.trim();
}
public Integer getdId() {
return dId;
}
public void setdId(Integer dId) {
this.dId = dId;
}
}
->Department.java
package com.atguigu.crud.bean;
public class Department {
private Integer deptId;
private String deptName;
public Department() {
super();
// TODO Auto-generated constructor stub
}
public Department(Integer deptId, String deptName) {
super();
this.deptId = deptId;
this.deptName = deptName;
}
public Integer getDeptId() {
return deptId;
}
public void setDeptId(Integer deptId) {
this.deptId = deptId;
}
public String getDeptName() {
return deptName;
}
public void setDeptName(String deptName) {
this.deptName = deptName == null ? null : deptName.trim();
}
}
好修改就那么多
其它没有修改的默认不动
测试
在这只测试所有部门跟批量插入， 原则上是需要所有的service里面的方法都要进行测试的
->MapperTest.java
package com.atguigu.crud.test;
import java.util.UUID;
import org.apache.ibatis.session.SqlSession;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import com.atguigu.crud.bean.Employee;
import com.atguigu.crud.dao.DepartmentMapper;
import com.atguigu.crud.dao.EmployeeMapper;
/**
* 测试dao层的工作
* @author lfy
*推荐Spring的项目就可以使用Spring的单元测试，可以自动注入我们需要的组件
*1、导入SpringTest模块
*2、@ContextConfiguration指定Spring配置文件的位置
*3、直接autowired要使用的组件即可
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath:applicationContext.xml"})
public class MapperTest {
@Autowired
DepartmentMapper departmentMapper;
@Autowired
EmployeeMapper employeeMapper;
@Autowired
SqlSession sqlSession;
/**
* 测试DepartmentMapper
*/
@Test
public void testCRUD(){
/* //1、创建SpringIOC容器
ApplicationContext ioc = new ClassPathXmlApplicationContext("applicationContext.xml");
//2、从容器中获取mapper
DepartmentMapper bean = ioc.getBean(DepartmentMapper.class);*/
System.out.println(departmentMapper);
//1、插入几个部门
// departmentMapper.insertSelective(new Department(null, "开发部"));
// departmentMapper.insertSelective(new Department(null, "测试部"));
//2、生成员工数据，测试员工插入
employeeMapper.insertSelective(new Employee(null, "Jerry", "M", "[email protected]", 1));
//3、批量插入多个员工；批量，使用可以执行批量操作的sqlSession。
// for(){
// employeeMapper.insertSelective(new Employee(null, , "M", "[email protected]", 1));
// }
EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class);
for(int i = 0;i<1000;i++){
String uid = UUID.randomUUID().toString().substring(0,5)+i;
mapper.insertSelective(new Employee(null,uid, "M", uid+"@atguigu.com", 1));
}
System.out.println("批量完成");
}
}
四、SSM实现简单的CRUD之Service层
开始Service层的编码之前，我们首先需要进行Dao层编码之后的思考:在Dao层我们只完成了针对表的相关操作包括写了接口方法和映射文件中的sql语句，并没有编写逻辑的代码，例如对多个Dao层方法的拼接，当我们用户成功秒杀商品时我们需要进行商品的减库存操作和增加用户明细等等，这些逻辑我们都需要在Service层完成。但是这个CRUD并不需要什么很难的逻辑只是一个简单的增删查改，所以在这个CRUD的Service层会很简单，接下来我们便进行Service层代码的编写。
->EmployeeService.java
package com.atguigu.crud.service;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.atguigu.crud.bean.Employee;
import com.atguigu.crud.bean.EmployeeExample;
import com.atguigu.crud.bean.EmployeeExample.Criteria;
import com.atguigu.crud.dao.EmployeeMapper;
@Service
public class EmployeeService {
@Autowired
EmployeeMapper employeeMapper;
/**
* 查询所有员工
* @return
*/
public List<Employee> getAll() {
// TODO Auto-generated method stub
return employeeMapper.selectByExampleWithDept(null);
}
/**
* 员工保存
* @param employee
*/
public void saveEmp(Employee employee) {
// TODO Auto-generated method stub
employeeMapper.insertSelective(employee);
}
/**
* 检验用户名是否可用
*
* @param empName
* @return true：代表当前姓名可用 fasle：不可用
*/
public boolean checkUser(String empName) {
// TODO Auto-generated method stub
EmployeeExample example = new EmployeeExample();
//这个我相信学过Hibernate 的同学都知道这个用法 不难 你可以理解为在where 加入条件
Criteria criteria = example.createCriteria();
//andEmpNameEqualTo根据词意来理解这个相当于 传入的这个empName与数据库的empName进行对比 不存在返回 0 ，存在返回其他
criteria.andEmpNameEqualTo(empName);
long count = employeeMapper.countByExample(example);
return count == 0;
}
/**
* 按照员工id查询员工
* @param id
* @return
*/
public Employee getEmp(Integer id) {
// TODO Auto-generated method stub
Employee employee = employeeMapper.selectByPrimaryKey(id);
return employee;
}
/**
* 员工更新
* @param employee
*/
public void updateEmp(Employee employee) {
// TODO Auto-generated method stub
employeeMapper.updateByPrimaryKeySelective(employee);
}
/**
* 员工删除
* @param id
*/
public void deleteEmp(Integer id) {
// TODO Auto-generated method stub
employeeMapper.deleteByPrimaryKey(id);
}
public void deleteBatch(List<Integer> ids) {
// TODO Auto-generated method stub
EmployeeExample example = new EmployeeExample();
Criteria criteria = example.createCriteria();
//delete from xxx where emp_id in(1,2,3)
criteria.andEmpIdIn(ids);
employeeMapper.deleteByExample(example);
}
}
在这个EmployeeService.java 类做一个说明上面我们用到了EmployeeExample下面对xxxExample做一下说明：
mybatis的逆向工程中会生成实例及实例对应的example，example用于添加条件，相当where后面的部分
xxxExample example = new xxxExample();
Criteria criteria = new example.createCriteria();
xxxExample 方法说明:
example.setOrderByClause(“字段名 ASC”); 添加升序排列条件，DESC为降序
example.setDistinct(false) 去除重复，boolean型，true为选择不重复的记录。
criteria.andXxxIsNull 添加字段xxx为null的条件
criteria.andXxxIsNotNull 添加字段xxx不为null的条件
criteria.andXxxEqualTo(value) 添加xxx字段等于value条件
criteria.andXxxNotEqualTo(value) 添加xxx字段不等于value条件
criteria.andXxxGreaterThan(value) 添加xxx字段大于value条件
criteria.andXxxGreaterThanOrEqualTo(value) 添加xxx字段大于等于value条件
criteria.andXxxLessThan(value) 添加xxx字段小于value条件
criteria.andXxxLessThanOrEqualTo(value) 添加xxx字段小于等于value条件
criteria.andXxxIn(List<？>) 添加xxx字段值在List<？>条件
criteria.andXxxNotIn(List<？>) 添加xxx字段值不在List<？>条件
criteria.andXxxLike(“%”+value+”%”) 添加xxx字段值为value的模糊查询条件
criteria.andXxxNotLike(“%”+value+”%”) 添加xxx字段值不为value的模糊查询条件
criteria.andXxxBetween(value1,value2) 添加xxx字段值在value1和value2之间条件
criteria.andXxxNotBetween(value1,value2) 添加xxx字段值不在value1和value2之间条件
以EmployeeService.java 里面用到的举例
EmployeeExample example = new EmployeeExample();
Criteria criteria = example.createCriteria();
criteria.andEmpNameEqualTo(empName);
long count = employeeMapper.countByExample(example);
相当于：
select * from tbl_emp where emp_name= 'hfbin'
->DepartmentService.java
package com.atguigu.crud.service;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.atguigu.crud.bean.Department;
import com.atguigu.crud.dao.DepartmentMapper;
@Service
public class DepartmentService {
@Autowired
private DepartmentMapper departmentMapper;
public List<Department> getDepts() {
// TODO Auto-generated method stub
List<Department> list = departmentMapper.selectByExample(null);
return list;
}
}
测试Service
在这我只抽取一两个进行测试其它测试需要你们自己动手了
ServicceTest.java
package cn.hfbin.crud.test;
import cn.hfbin.crud.service.EmployeeService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath:applicationContext.xml"})
public class ServicceTest {
@Autowired
EmployeeService employeeService;
/**
* 测试用户名是否可用
* 查询id为4416的信息
*/
@Test
public void text01(){
System.out.println("返回true或false----"+employeeService.checkUser("hfbin"));
System.out.println("返回id为4416的数据"+employeeService.getEmp(4416));
}
}
五、SSM实现简单的CRUD之Controller层
Controller开发
在开发Controller之前先注意一点 因为整个crud我们是全程基于ajax，所以先创建一个在cn.hfbin.crud包下创建dto包，用来存放放回的数据。新建一个Msg类，内容如下：
Msg.java
package com.atguigu.crud.bean;
import java.util.HashMap;
import java.util.Map;
/**
* 通用的返回的类
*
* @author lfy
*
*/
public class Msg {
//状态码 100-成功 200-失败
private int code;
//提示信息
private String msg;
//用户要返回给浏览器的数据
private Map<String, Object> extend = new HashMap<String, Object>();
public static Msg success(){
Msg result = new Msg();
result.setCode(100);
result.setMsg("处理成功！");
return result;
}
public static Msg fail(){
Msg result = new Msg();
result.setCode(200);
result.setMsg("处理失败！");
return result;
}
public Msg add(String key,Object value){
this.getExtend().put(key, value);
return this;
}
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public Map<String, Object> getExtend() {
return extend;
}
public void setExtend(Map<String, Object> extend) {
this.extend = extend;
}
}
Controller中的每一个方法都对应我们系统中的一个资源URL，其设计应该遵循Restful接口的设计风格。在cn.hfbin.crud包下创建一个controller包用于放web层Controller开发的代码，在该包下创建一个EmployeeController.java，内容如下:
->EmployeeController.java
package com.atguigu.crud.controller;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.validation.Valid;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import com.atguigu.crud.bean.Employee;
import com.atguigu.crud.bean.Msg;
import com.atguigu.crud.service.EmployeeService;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
/**
* 处理员工CRUD请求
*
* @author lfy
*
*/
@Controller
public class EmployeeController {
@Autowired
EmployeeService employeeService;
/**
* 单个批量二合一
* 批量删除：1-2-3
* 单个删除：1
*
* @param id
* @return
*/
@ResponseBody
@RequestMapping(value="/emp/{ids}",method=RequestMethod.DELETE)
public Msg deleteEmp(@PathVariable("ids")String ids){
//批量删除
if(ids.contains("-")){
List<Integer> del_ids = new ArrayList<>();
String[] str_ids = ids.split("-");
//组装id的集合
for (String string : str_ids) {
del_ids.add(Integer.parseInt(string));
}
employeeService.deleteBatch(del_ids);
}else{
Integer id = Integer.parseInt(ids);
employeeService.deleteEmp(id);
}
return Msg.success();
}
/**
* 如果直接发送ajax=PUT形式的请求
* 封装的数据
* Employee
* [empId=1014, empName=null, gender=null, email=null, dId=null]
*
* 问题：
* 请求体中有数据；
* 但是Employee对象封装不上；
* update tbl_emp where emp_id = 1014;
*
* 原因：
* Tomcat：
* 1、将请求体中的数据，封装一个map。
* 2、request.getParameter("empName")就会从这个map中取值。
* 3、SpringMVC封装POJO对象的时候。
* 会把POJO中每个属性的值，request.getParamter("email");
* AJAX发送PUT请求引发的血案：
* PUT请求，请求体中的数据，request.getParameter("empName")拿不到
* Tomcat一看是PUT不会封装请求体中的数据为map，只有POST形式的请求才封装请求体为map
* org.apache.catalina.connector.Request--parseParameters() (3111);
*
* protected String parseBodyMethods = "POST";
* if( !getConnector().isParseBodyMethod(getMethod()) ) {
success = true;
return;
}
*
*
* 解决方案；
* 我们要能支持直接发送PUT之类的请求还要封装请求体中的数据
* 1、配置上HttpPutFormContentFilter；
* 2、他的作用；将请求体中的数据解析包装成一个map。
* 3、request被重新包装，request.getParameter()被重写，就会从自己封装的map中取数据
* 员工更新方法
* @param employee
* @return
*/
@ResponseBody
@RequestMapping(value="/emp/{empId}",method=RequestMethod.PUT)
public Msg saveEmp(Employee employee,HttpServletRequest request){
System.out.println("请求体中的值："+request.getParameter("gender"));
System.out.println("将要更新的员工数据："+employee);
employeeService.updateEmp(employee);
return Msg.success() ;
}
/**
* 根据id查询员工
* @param id
* @return
*/
@RequestMapping(value="/emp/{id}",method=RequestMethod.GET)
@ResponseBody
public Msg getEmp(@PathVariable("id")Integer id){
Employee employee = employeeService.getEmp(id);
return Msg.success().add("emp", employee);
}
/**
* 检查用户名是否可用
* @param empName
* @return
*/
@ResponseBody
@RequestMapping("/checkuser")
public Msg checkuser(@RequestParam("empName")String empName){
//先判断用户名是否是合法的表达式;
String regx = "(^[a-zA-Z0-9_-]{6,16}$)|(^[\u2E80-\u9FFF]{2,5})";
if(!empName.matches(regx)){
return Msg.fail().add("va_msg", "用户名必须是6-16位数字和字母的组合或者2-5位中文");
}
//数据库用户名重复校验
boolean b = employeeService.checkUser(empName);
if(b){
return Msg.success();
}else{
return Msg.fail().add("va_msg", "用户名不可用");
}
}
/**
* 员工保存
* 1、支持JSR303校验
* 2、导入Hibernate-Validator
*
*
* @return
*/
@RequestMapping(value="/emp",method=RequestMethod.POST)
@ResponseBody
public Msg saveEmp(@Valid Employee employee,BindingResult result){
if(result.hasErrors()){
//校验失败，应该返回失败，在模态框中显示校验失败的错误信息
Map<String, Object> map = new HashMap<>();
List<FieldError> errors = result.getFieldErrors();
for (FieldError fieldError : errors) {
System.out.println("错误的字段名："+fieldError.getField());
System.out.println("错误信息："+fieldError.getDefaultMessage());
map.put(fieldError.getField(), fieldError.getDefaultMessage());
}
return Msg.fail().add("errorFields", map);
}else{
employeeService.saveEmp(employee);
return Msg.success();
}
}
/**
* 导入jackson包。
* @param pn
* @return
*/
@RequestMapping("/emps")
@ResponseBody
public Msg getEmpsWithJson(
@RequestParam(value = "pn", defaultValue = "1") Integer pn) {
// 这不是一个分页查询
// 引入PageHelper分页插件
// 在查询之前只需要调用，传入页码，以及每页的大小
PageHelper.startPage(pn, 5);
// startPage后面紧跟的这个查询就是一个分页查询
List<Employee> emps = employeeService.getAll();
// 使用pageInfo包装查询后的结果，只需要将pageInfo交给页面就行了。
// 封装了详细的分页信息,包括有我们查询出来的数据，传入连续显示的页数
PageInfo page = new PageInfo(emps, 5);
return Msg.success().add("pageInfo", page);
}
/**
* 查询员工数据（分页查询）
*
* @return
*/
// @RequestMapping("/emps")
public String getEmps(
@RequestParam(value = "pn", defaultValue = "1") Integer pn,
Model model) {
// 这不是一个分页查询；
// 引入PageHelper分页插件
// 在查询之前只需要调用，传入页码，以及每页的大小
PageHelper.startPage(pn, 5);
// startPage后面紧跟的这个查询就是一个分页查询
List<Employee> emps = employeeService.getAll();
// 使用pageInfo包装查询后的结果，只需要将pageInfo交给页面就行了。
// 封装了详细的分页信息,包括有我们查询出来的数据，传入连续显示的页数
PageInfo page = new PageInfo(emps, 5);
model.addAttribute("pageInfo", page);
return "list";
}
}
在这不做过多的说明每一行代码都有注释
下面说明一下这三个注解代表什么
@ResponseBody 返回json数据
@RequestMapping(“”) 请求路径
@RequestParam 请求参数
DepartmentController.java 这个Controller就做一个部门查询很简单，代码如下：
package com.atguigu.crud.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.atguigu.crud.bean.Department;
import com.atguigu.crud.bean.Msg;
import com.atguigu.crud.service.DepartmentService;
/**
* 处理和部门有关的请求
* @author lfy
*
*/
@Controller
public class DepartmentController {
@Autowired
private DepartmentService departmentService;
/**
* 返回所有的部门信息
*/
@RequestMapping("/depts")
@ResponseBody
public Msg getDepts(){
//查出的所有部门信息
List<Department> list = departmentService.getDepts();
return Msg.success().add("depts", list);
}
}
到此，Controller的开发任务完成，接下来进行我们的页面开发。
六、SSM实现简单的CRUD之Web层
本篇文章主要来讲解Web层，主要介绍前端交互设计、Restful:url满足Restful设计规范、Spring MVC、bootstrap+jquery这四个方面的开发。
Restful接口设计学习
CRUD API URL 设计
一定记得在web.xml文件中加入以下配置：
<filter>
<filter-name>HiddenHttpMethodFilter</filter-name>
<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>HiddenHttpMethodFilter</filter-name>
<url-pattern>/</url-pattern>
</filter-mapping>
接下来基于上述资源接口来开始我们对Spring MVC框架的使用。
页面开发
页面由前端工程师完成，这里直接拷贝我github上源代码中jsp的代码(webapp包下的所有资源)即可。
然后运行Tomcat服务器,在浏览器中输入http://localhost:8080/emps，即可访问我们的秒杀列表页面:
-index.jsp
<%@ page language=“java” contentType=“text/html; charset=UTF-8”
pageEncoding=“UTF-8”%>
<%@taglib uri=“http://java.sun.com/jsp/jstl/core” prefix=“c”%>
<%
pageContext.setAttribute(“APP_PATH”, request.getContextPath());
%>
<!-- 员工添加的模态框 -->
<div class="modal fade" id="empAddModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
<h4 class="modal-title" id="myModalLabel">员工添加</h4>
</div>
<div class="modal-body">
<form class="form-horizontal">
<div class="form-group">
<label class="col-sm-2 control-label">empName</label>
<div class="col-sm-10">
<input type="text" name="empName" class="form-control" id="empName_add_input" placeholder="empName">
<span class="help-block"></span>
</div>
</div>
<div class="form-group">
<label class="col-sm-2 control-label">email</label>
<div class="col-sm-10">
<input type="text" name="email" class="form-control" id="email_add_input" placeholder="[email protected]">
<span class="help-block"></span>
</div>
</div>
<div class="form-group">
<label class="col-sm-2 control-label">gender</label>
<div class="col-sm-10">
<label class="radio-inline">
<input type="radio" name="gender" id="gender1_add_input" value="M" checked="checked"> 男
</label>
<label class="radio-inline">
<input type="radio" name="gender" id="gender2_add_input" value="F"> 女
</label>
</div>
</div>
<div class="form-group">
<label class="col-sm-2 control-label">deptName</label>
<div class="col-sm-4">
<!-- 部门提交部门id即可 -->
<select class="form-control" name="dId">
</select>
</div>
</div>
</form>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">关闭</button>
<button type="button" class="btn btn-primary" id="emp_save_btn">保存</button>
</div>
</div>
</div>
</div>
<!-- 搭建显示页面 -->
<div class="container">
<!-- 标题 -->
<div class="row">
<div class="col-md-12">
<h1>SSM-CRUD</h1>
</div>
</div>
<!-- 按钮 -->
<div class="row">
<div class="col-md-4 col-md-offset-8">
<button class="btn btn-primary" id="emp_add_modal_btn">新增</button>
<button class="btn btn-danger" id="emp_delete_all_btn">删除</button>
</div>
</div>
<!-- 显示表格数据 -->
<div class="row">
<div class="col-md-12">
<table class="table table-hover" id="emps_table">
<thead>
<tr>
<th>
<input type="checkbox" id="check_all"/>
</th>
<th>#</th>
<th>empName</th>
<th>gender</th>
<th>email</th>
<th>deptName</th>
<th>操作</th>
</tr>
</thead>
<tbody>
</tbody>
</table>
</div>
</div>
<!-- 显示分页信息 -->
<div class="row">
<!--分页文字信息 -->
<div class="col-md-6" id="page_info_area"></div>
<!-- 分页条信息 -->
<div class="col-md-6" id="page_nav_area">
</div>
</div>
</div>
<script type="text/javascript">
var totalRecord,currentPage;
//1、页面加载完成以后，直接去发送ajax请求,要到分页数据
$(function(){
//去首页
to_page(1);
});
function to_page(pn){
$.ajax({
url:"${APP_PATH}/emps",
data:"pn="+pn,
type:"GET",
success:function(result){
//console.log(result);
//1、解析并显示员工数据
build_emps_table(result);
//2、解析并显示分页信息
build_page_info(result);
//3、解析显示分页条数据
build_page_nav(result);
}
});
}
function build_emps_table(result){
//清空table表格
$("#emps_table tbody").empty();
var emps = result.extend.pageInfo.list;
$.each(emps,function(index,item){
var checkBoxTd = $("<td><input type='checkbox' class='check_item'/></td>");
var empIdTd = $("<td></td>").append(item.empId);
var empNameTd = $("<td></td>").append(item.empName);
var genderTd = $("<td></td>").append(item.gender=='M'?"男":"女");
var emailTd = $("<td></td>").append(item.email);
var deptNameTd = $("<td></td>").append(item.department.deptName);
/**
<button class="">
<span class="" aria-hidden="true"></span>
编辑
</button>
*/
var editBtn = $("<button></button>").addClass("btn btn-primary btn-sm edit_btn")
.append($("<span></span>").addClass("glyphicon glyphicon-pencil")).append("编辑");
//为编辑按钮添加一个自定义的属性，来表示当前员工id
editBtn.attr("edit-id",item.empId);
var delBtn = $("<button></button>").addClass("btn btn-danger btn-sm delete_btn")
.append($("<span></span>").addClass("glyphicon glyphicon-trash")).append("删除");
//为删除按钮添加一个自定义的属性来表示当前删除的员工id
delBtn.attr("del-id",item.empId);
var btnTd = $("<td></td>").append(editBtn).append(" ").append(delBtn);
//var delBtn =
//append方法执行完成以后还是返回原来的元素
$("<tr></tr>").append(checkBoxTd)
.append(empIdTd)
.append(empNameTd)
.append(genderTd)
.append(emailTd)
.append(deptNameTd)
.append(btnTd)
.appendTo("#emps_table tbody");
});
}
//解析显示分页信息
function build_page_info(result){
$("#page_info_area").empty();
$("#page_info_area").append("当前"+result.extend.pageInfo.pageNum+"页,总"+
result.extend.pageInfo.pages+"页,总"+
result.extend.pageInfo.total+"条记录");
totalRecord = result.extend.pageInfo.total;
currentPage = result.extend.pageInfo.pageNum;
}
//解析显示分页条，点击分页要能去下一页....
function build_page_nav(result){
//page_nav_area
$("#page_nav_area").empty();
var ul = $("<ul></ul>").addClass("pagination");
//构建元素
var firstPageLi = $("<li></li>").append($("<a></a>").append("首页").attr("href","#"));
var prePageLi = $("<li></li>").append($("<a></a>").append("«"));
if(result.extend.pageInfo.hasPreviousPage == false){
firstPageLi.addClass("disabled");
prePageLi.addClass("disabled");
}else{
//为元素添加点击翻页的事件
firstPageLi.click(function(){
to_page(1);
});
prePageLi.click(function(){
to_page(result.extend.pageInfo.pageNum -1);
});
}
var nextPageLi = $("<li></li>").append($("<a></a>").append("»"));
var lastPageLi = $("<li></li>").append($("<a></a>").append("末页").attr("href","#"));
if(result.extend.pageInfo.hasNextPage == false){
nextPageLi.addClass("disabled");
lastPageLi.addClass("disabled");
}else{
nextPageLi.click(function(){
to_page(result.extend.pageInfo.pageNum +1);
});
lastPageLi.click(function(){
to_page(result.extend.pageInfo.pages);
});
}
//添加首页和前一页 的提示
ul.append(firstPageLi).append(prePageLi);
//1,2，3遍历给ul中添加页码提示
$.each(result.extend.pageInfo.navigatepageNums,function(index,item){
var numLi = $("<li></li>").append($("<a></a>").append(item));
if(result.extend.pageInfo.pageNum == item){
numLi.addClass("active");
}
numLi.click(function(){
to_page(item);
});
ul.append(numLi);
});
//添加下一页和末页 的提示
ul.append(nextPageLi).append(lastPageLi);
//把ul加入到nav
var navEle = $("<nav></nav>").append(ul);
navEle.appendTo("#page_nav_area");
}
//清空表单样式及内容
function reset_form(ele){
$(ele)[0].reset();
//清空表单样式
$(ele).find("*").removeClass("has-error has-success");
$(ele).find(".help-block").text("");
}
//点击新增按钮弹出模态框。
$("#emp_add_modal_btn").click(function(){
//清除表单数据（表单完整重置（表单的数据，表单的样式））
reset_form("#empAddModal form");
//s$("")[0].reset();
//发送ajax请求，查出部门信息，显示在下拉列表中
getDepts("#empAddModal select");
//弹出模态框
$("#empAddModal").modal({
backdrop:"static"
});
});
//查出所有的部门信息并显示在下拉列表中
function getDepts(ele){
//清空之前下拉列表的值
$(ele).empty();
$.ajax({
url:"${APP_PATH}/depts",
type:"GET",
success:function(result){
//{"code":100,"msg":"处理成功！",
//"extend":{"depts":[{"deptId":1,"deptName":"开发部"},{"deptId":2,"deptName":"测试部"}]}}
//console.log(result);
//显示部门信息在下拉列表中
//$("#empAddModal select").append("")
$.each(result.extend.depts,function(){
var optionEle = $("<option></option>").append(this.deptName).attr("value",this.deptId);
optionEle.appendTo(ele);
});
}
});
}
//校验表单数据
function validate_add_form(){
//1、拿到要校验的数据，使用正则表达式
var empName = $("#empName_add_input").val();
var regName = /(^[a-zA-Z0-9_-]{6,16}$)|(^[\u2E80-\u9FFF]{2,5})/;
if(!regName.test(empName)){
//alert("用户名可以是2-5位中文或者6-16位英文和数字的组合");
show_validate_msg("#empName_add_input", "error", "用户名可以是2-5位中文或者6-16位英文和数字的组合");
return false;
}else{
show_validate_msg("#empName_add_input", "success", "");
};
//2、校验邮箱信息
var email = $("#email_add_input").val();
var regEmail = /^([a-z0-9_\.-]+)@([\da-z\.-]+)\.([a-z\.]{2,6})$/;
if(!regEmail.test(email)){
//alert("邮箱格式不正确");
//应该清空这个元素之前的样式
show_validate_msg("#email_add_input", "error", "邮箱格式不正确");
/* $("#email_add_input").parent().addClass("has-error");
$("#email_add_input").next("span").text("邮箱格式不正确"); */
return false;
}else{
show_validate_msg("#email_add_input", "success", "");
}
return true;
}
//显示校验结果的提示信息
function show_validate_msg(ele,status,msg){
//清除当前元素的校验状态
$(ele).parent().removeClass("has-success has-error");
$(ele).next("span").text("");
if("success"==status){
$(ele).parent().addClass("has-success");
$(ele).next("span").text(msg);
}else if("error" == status){
$(ele).parent().addClass("has-error");
$(ele).next("span").text(msg);
}
}
//校验用户名是否可用
$("#empName_add_input").change(function(){
//发送ajax请求校验用户名是否可用
var empName = this.value;
$.ajax({
url:"${APP_PATH}/checkuser",
data:"empName="+empName,
type:"POST",
success:function(result){
if(result.code==100){
show_validate_msg("#empName_add_input","success","用户名可用");
$("#emp_save_btn").attr("ajax-va","success");
}else{
show_validate_msg("#empName_add_input","error",result.extend.va_msg);
$("#emp_save_btn").attr("ajax-va","error");
}
}
});
});
//点击保存，保存员工。
$("#emp_save_btn").click(function(){
//1、模态框中填写的表单数据提交给服务器进行保存
//1、先对要提交给服务器的数据进行校验
if(!validate_add_form()){
return false;
};
//1、判断之前的ajax用户名校验是否成功。如果成功。
if($(this).attr("ajax-va")=="error"){
return false;
}
//2、发送ajax请求保存员工
$.ajax({
url:"${APP_PATH}/emp",
type:"POST",
data:$("#empAddModal form").serialize(),
success:function(result){
//alert(result.msg);
if(result.code == 100){
//员工保存成功；
//1、关闭模态框
$("#empAddModal").modal('hide');
//2、来到最后一页，显示刚才保存的数据
//发送ajax请求显示最后一页数据即可
to_page(totalRecord);
}else{
//显示失败信息
//console.log(result);
//有哪个字段的错误信息就显示哪个字段的；
if(undefined != result.extend.errorFields.email){
//显示邮箱错误信息
show_validate_msg("#email_add_input", "error", result.extend.errorFields.email);
}
if(undefined != result.extend.errorFields.empName){
//显示员工名字的错误信息
show_validate_msg("#empName_add_input", "error", result.extend.errorFields.empName);
}
}
}
});
});
//1、我们是按钮创建之前就绑定了click，所以绑定不上。
//1）、可以在创建按钮的时候绑定。 2）、绑定点击.live()
//jquery新版没有live，使用on进行替代
$(document).on("click",".edit_btn",function(){
//alert("edit");
//1、查出部门信息，并显示部门列表
getDepts("#empUpdateModal select");
//2、查出员工信息，显示员工信息
getEmp($(this).attr("edit-id"));
//3、把员工的id传递给模态框的更新按钮
$("#emp_update_btn").attr("edit-id",$(this).attr("edit-id"));
$("#empUpdateModal").modal({
backdrop:"static"
});
});
function getEmp(id){
$.ajax({
url:"${APP_PATH}/emp/"+id,
type:"GET",
success:function(result){
//console.log(result);
var empData = result.extend.emp;
$("#empName_update_static").text(empData.empName);
$("#email_update_input").val(empData.email);
$("#empUpdateModal input[name=gender]").val([empData.gender]);
$("#empUpdateModal select").val([empData.dId]);
}
});
}
//点击更新，更新员工信息
$("#emp_update_btn").click(function(){
//验证邮箱是否合法
//1、校验邮箱信息
var email = $("#email_update_input").val();
var regEmail = /^([a-z0-9_\.-]+)@([\da-z\.-]+)\.([a-z\.]{2,6})$/;
if(!regEmail.test(email)){
show_validate_msg("#email_update_input", "error", "邮箱格式不正确");
return false;
}else{
show_validate_msg("#email_update_input", "success", "");
}
//2、发送ajax请求保存更新的员工数据
$.ajax({
url:"${APP_PATH}/emp/"+$(this).attr("edit-id"),
type:"PUT",
data:$("#empUpdateModal form").serialize(),
success:function(result){
//alert(result.msg);
//1、关闭对话框
$("#empUpdateModal").modal("hide");
//2、回到本页面
to_page(currentPage);
}
});
});
//单个删除
$(document).on("click",".delete_btn",function(){
//1、弹出是否确认删除对话框
var empName = $(this).parents("tr").find("td:eq(2)").text();
var empId = $(this).attr("del-id");
//alert($(this).parents("tr").find("td:eq(1)").text());
if(confirm("确认删除【"+empName+"】吗？")){
//确认，发送ajax请求删除即可
$.ajax({
url:"${APP_PATH}/emp/"+empId,
type:"DELETE",
success:function(result){
alert(result.msg);
//回到本页
to_page(currentPage);
}
});
}
});
//完成全选/全不选功能
$("#check_all").click(function(){
//attr获取checked是undefined;
//我们这些dom原生的属性；attr获取自定义属性的值；
//prop修改和读取dom原生属性的值
$(".check_item").prop("checked",$(this).prop("checked"));
});
//check_item
$(document).on("click",".check_item",function(){
//判断当前选择中的元素是否5个
var flag = $(".check_item:checked").length==$(".check_item").length;
$("#check_all").prop("checked",flag);
});
//点击全部删除，就批量删除
$("#emp_delete_all_btn").click(function(){
//
var empNames = "";
var del_idstr = "";
$.each($(".check_item:checked"),function(){
//this
empNames += $(this).parents("tr").find("td:eq(2)").text()+",";
//组装员工id字符串
del_idstr += $(this).parents("tr").find("td:eq(1)").text()+"-";
});
//去除empNames多余的,
empNames = empNames.substring(0, empNames.length-1);
//去除删除的id多余的-
del_idstr = del_idstr.substring(0, del_idstr.length-1);
if(confirm("确认删除【"+empNames+"】吗？")){
//发送ajax请求删除
$.ajax({
url:"${APP_PATH}/emp/"+del_idstr,
type:"DELETE",
success:function(result){
alert(result.msg);
//回到当前页面
to_page(currentPage);
}
});
}
});
</script>
</body>
</html>