SSM:
SSM是由Spring、SpringMvc、Mybatis三大框架整合而成的。
整合步骤:
前提条件:导入jar包(Spring、SpringMvc、Mybatis所需的jar,Spring与Mybatis整合jar、数据库操作所需jar等)【具体的看我分享的链接】
配置web.xml文件:
<!-- 处理编码格式 -->
<filter>
<filter-name>characterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--加载spring配置文件-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--加载springmvc配置文件-->
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- springmvc默认加载springmvc的配置文件,这个需要满足以下规则:
命名规则:servlet-name-servlet.xml====>springmvc-servlet.xml
路径规范:springmvc-servlet.xml必须放在WEB-INF下面
-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:dispatcher.xml</param-value>
</init-param>
</servlet>
<!--配置可用后缀--->
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/rest/*</url-pattern>
</servlet-mapping>
<!--这是文件上传时的后缀,
如需要上传其他格式,将url-pattern的内容改为所需的即可-->
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.jpg</url-pattern>
</servlet-mapping>
配置spring文件:(applicationContext.xml)
<!--扫描注解-->
<context:component-scan base-package="com.ssm"/>
<!--加载java的配置文件-->
<context:property-placeholder location="classpath:db.properties"/>
<!--第一步:配置数据源-->
<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<!--第二步:创建sqlSessionFactory,生产sqlSession-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation" value="classpath:sqlMapConfig.xml"/>
</bean>
<!--配置mybatis接口代理开发
* 接口类和映射文件必须同名
* 接口类与映射文件必须在同一目录下
* 映射文件namespace名字必须是借口的全类路径
* 接口的方法名必须和映射Statement的id一致-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.ssm.dao"/>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>
<!--第三步:事务-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!--配置通知-->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="save" propagation="REQUIRED"/>
<tx:method name="update" propagation="REQUIRED"/>
<tx:method name="delete" propagation="REQUIRED"/>
<tx:method name="insert" propagation="REQUIRED"/>
<tx:method name="*" propagation="REQUIRED"/>
</tx:attributes>
</tx:advice>
<!--配置拦截service-->
<aop:config>
<aop:advisor advice-ref="txAdvice" pointcut="execution(* com.ssm.service.*.*(..))"/>
</aop:config>
<!--配置路径-->
<mvc:annotation-driven/>
<mvc:default-servlet-handler/>
<mvc:resources mapping="/static/upload/**" location="/static/upload/"/>
<mvc:resources mapping="/static/js/**" location="/static/js/"/>
数据库信息文件 db.properties:
jdbc.driver = com.mysql.jdbc.Driver
jdbc.url = jdbc:mysql://localhost:3306/mybatis_01?useUnicode=true&characterEncoding=UTF-8
jdbc.username = root
jdbc.password = 123
配置springmvc文件:(dispatcher.xml)
<!-- 将controller交给spring管理 -->
<context:component-scan base-package="com.ssm"></context:component-scan>
<!--
<mvc:annotation-driven/>默认创建RequestMappingHandlerMapping,RequestMappingHandlerAdapter
提供对json数据格式支持
-->
<mvc:annotation-driven/>
<!-- 配置视图解析器:解析出真正的物理视图
后台返回逻辑视图:index
解析出真正的物理视图,前端+逻辑视图+后缀==/WEB-INF/index.jsp(/index.jsp)
-->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<!--文件上传解析器-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="10240000"></property>
</bean>
配置mybatis文件:
(注意都放在config【idea设置文件为 Resources Root】或者放在src下)
sqlMapConfig.xml:
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!--自定义别名-->
<typeAliases>
<package name="com.ssm.po"/>
</typeAliases>
<!--加载映射文件-->
<mappers>
<mapper resource="com/ssm/dao/UserMapper.xml"/>
<mapper resource="com/ssm/dao/VideoMapper.xml"/>
<!--<!–批量加载映射文件–>-->
<!--<package name="com.sm.mapper"/>-->
</mappers>
</configuration>
log4j.properties:
# Global logging configuration
log4j.rootLogger=DEBUG, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n
创建mapper.xml(用于对数据库进行操作):
例如:UserMapper.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">
<!--注意:在mapper代理时,它具有特殊及重要的作用-->
<!-- namespace:命名空间,用于隔离sql -->
<!-- 还有一个很重要的作用,使用动态代理开发DAO,1. namespace必须和Mapper接口类路径一致 -->
<mapper namespace="com.ssm.dao.UserMapper">
<!-- 根据用户ID查询用户信息-->
<!-- select:表示一个MappingStatement对象-->
<!-- id:statement的唯一标识-->
<!-- #{}:表示一个占位符?-->
<!-- #{id}:里面的id表示输入参数的参数名称,如果该参数是简单类型,那么#{}里面的参数名称可以任意-->
<!-- parameterType:输入参数的java类型-->
<!-- resultType:输出结果的所映射的java类型(单条结果所对应的的java类型)-->
<select id="findUserById" parameterType="int" resultType="com.ssm.po.User">
SELECT * FROM USER WHERE id =#{id}
</select>
<!--查询全部-->
<select id="findUserAll" resultType="com.ssm.po.User">
SELECT * FROM USER
</select>
<!--通过username查找用户-->
<select id="findUserByUsername" parameterType="String" resultType="com.ssm.po.User">
select * from user where username like '%${value}%'
</select>
<!-- 新增用户 -->
<insert id="insertUser" parameterType="com.ssm.po.User">
<!-- selectKey 标签实现主键返回 -->
<!-- keyColumn:主键对应的表中的哪一列 -->
<!-- keyProperty:主键对应的pojo中的哪一个属性 -->
<!-- order:设置在执行insert语句前执行查询id的sql,孩纸在执行insert语句之后执行查询id的sql -->
<!-- resultType:设置返回的id的类型 -->
<selectKey keyColumn="id" keyProperty="id" order="AFTER" resultType="int">
SELECT LAST_INSERT_ID()
</selectKey>
INSERT INTO `user`
(username,birthday,sex,address,head) VALUES (#{username},#{birthday},#{sex},#{address},#{head})
</insert>
<!-- 更新用户 -->
<update id="updateUserById" parameterType="com.ssm.po.User">
UPDATE `user` SET
username = #{username} WHERE id = #{id}
</update>
<!-- 删除用户 -->
<delete id="deleteUserById" parameterType="int">
delete from user where id=#{id}
</delete>
</mapper>
创建Mapper.xml对应接口:
UserMapper.java:
package com.ssm.dao;
import com.ssm.po.User;
import java.util.List;
public interface UserMapper {
//通过id查找用户信息
User findUserById(Integer id);
//查找所有用户信息
List<User> findUserAll();
//通过username查找用户信息
List<User> findUserByUsername(String username);
//新增用户
void insertUser(User user);
//通过id更新username
void updateUserById(User user);
//通过id删除指定用户
void deleteUserById(Integer id);
}
创建service接口与实现类:
接口:
package com.ssm.service;
import com.ssm.po.User;
import java.util.List;
public interface UserService {
List<User> findUserAll();
//通过id查找用户信息
User findUserById(Integer id);
//通过username查找用户信息
List<User> findUserByUsername(String username);
//新增用户
void insertUser(User user);
//通过id更新username
void updateUserById(User user);
//通过id删除指定用户
void deleteUserById(Integer id);
}
实现类:
package com.ssm.service.impl;
import com.ssm.dao.UserMapper;
import com.ssm.po.User;
import com.ssm.service.UserService;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
import java.util.List;
@Service
public class UserServiceImpl implements UserService {
@Resource
private UserMapper userMapper;
@Override
public List<User> findUserAll() {
List<User> list = userMapper.findUserAll();
return list;
}
@Override
public User findUserById(Integer id) {
User user = userMapper.findUserById(id);
return user;
}
@Override
public List<User> findUserByUsername(String username) {
List<User> list = userMapper.findUserByUsername(username);
return list;
}
@Override
public void insertUser(User user) {
userMapper.insertUser(user);
}
@Override
public void updateUserById(User user) {
userMapper.updateUserById(user);
}
@Override
public void deleteUserById(Integer id) {
userMapper.deleteUserById(id);
}
}
创建controller进行获取请求进行前后端交互操作:
package com.ssm.controller;
import com.ssm.po.User;
import com.ssm.service.UserService;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import java.util.List;
import java.util.UUID;
@Controller
@RequestMapping("/user")
public class UserController {
@Resource
private UserService userService;
//查询所有用户
@RequestMapping("list")
public String list(Model model){
List<User> list = userService.findUserAll();
model.addAttribute("list",list);
return "UserList";
}
//查询所有用户
@RequestMapping("listById")
public String findUserById(Model model,int id){
User user = userService.findUserById(id);
model.addAttribute("user",user);
return "UpdateUser";
}
//根据关键词找名字查询所有用户
@RequestMapping("listByUsername")
public String listByUsername(Model model,String username){
List<User> list = userService.findUserByUsername(username);
model.addAttribute("list",list);
return "UserList";
}
@RequestMapping("saveUser")
public String saveUser(Model model,int id,String username){
User user = new User();
user.setId(id);
user.setUsername(username);
userService.updateUserById(user);
return "index";
}
//插入新用户(顺带上传头像)
//【注意喔,上传图片的格式还要在web.xml配置】
@RequestMapping("insertUser")
public String insertUser(String username, String sex, String address,MultipartFile upload, HttpServletRequest request) throws IOException {
//使用fileupload组件完成文件上传
//上传位置指定
//上传的位置要指定
String path = request.getSession().getServletContext().getRealPath("/static/upload/");
//判断该路径是否存在
File file = new File(path);
if (!file.exists()) {
//如果这个文件夹不存在的话,就创建这个文件
file.mkdirs();
System.out.println("noexist");
}else{
System.out.println("exist");
}
//获取上传文件名称
String filename = upload.getOriginalFilename();
//把文件名称设置成唯一值 uuid 以防止文件名相同覆盖
String uuid = UUID.randomUUID().toString().replace("-", "");
//新文件名
filename = uuid + "_" + filename;
//完成文件上传
upload.transferTo(new File(path, filename));
String NewFilePath = "static/upload/"+filename;
User user = new User();
user.setUsername(username);
user.setHead(NewFilePath);
user.setBirthday(new Date());
user.setSex(sex);
user.setAddress(address);
userService.insertUser(user);
return "redirect:list.do";
}
//删除用户
@RequestMapping("deleteUser")
public String deleteUser(int id){
userService.deleteUserById(id);
return "redirect:list.do";
}
}
jsp前端:
<h1>用户列表:</h1>
<form method="post" action="${pageContext.request.contextPath}/user/listByUsername.do" >
(根据用户名称查找)<input type="text" name="username" id="username">
<input type="submit" value="查找">
</form>
<a href="${pageContext.request.contextPath}/user/list.do">显示所有用户</a>
<table width="80%" border="1">
<tr>
<td>序号</td>
<td>编号</td>
<td>头像</td>
<td>名字</td>
<td>性别</td>
<td>生日</td>
<td>住址</td>
<td>操作1</td>
<td>操作2</td>
</tr>
<c:forEach items="${list}" var="user" varStatus="u">
<tr>
<td>${u.count}</td>
<td>${user.id}</td>
<td><img src="${pageContext.request.contextPath}/${user.head}" style="width: 60px;height: 60px;"></td>
<td>${user.username}</td>
<td>${user.sex}</td>
<td>${user.birthday}</td>
<td>${user.address}</td>
<td><a href="${pageContext.request.contextPath}/user/listById.do?id=${user.id}">修改</a></td>
<td><a href="${pageContext.request.contextPath}/user/deleteUser.do?id=${user.id}">删除</a></td>
</tr>
</c:forEach>
</table>
<hr>
<h1>添加用户</h1>
<form action="${pageContext.request.contextPath}/user/insertUser.do" method="post" enctype="multipart/form-data" id="useritem">
<span>姓名:</span><input type="text" value="${user.username}" name="username" id="uname"/>
<span>性别:</span>
<select id="sex" name="sex">
<option value="男">男</option>
<option value="女">女</option>
</select>
<span>住址:</span><input type="text" value="${user.address}" name="address" id="address">
<hr/>
<img src="" id="imgSrc" height="100" width="100">
<input type="file" id="upload" name="upload" class="upload">
<input type="hidden" value="" id="head" name="head"/>
<input type="submit" value="添加"/>
</form>
具体操作没有展示,有什么问题可留言。
注意:上传文件的路径和格式也需要要在web.xml配置喔。
谢谢阅读。