使用ssm(spring+springMVC+mybatis)创建一个简单的查询实例(二) 用ssm(spring+springMVC+mybatis)创建一个简单的查询实例(一)

这篇是上一篇的延续:

用ssm(spring+springMVC+mybatis)创建一个简单的查询实例(一)

这篇就根据实际文件进行梳理:

首先已经确定的文件有:Person    PersonMapper    PersonMapper.xml    jdbc.properties

这些有的自动生成的文件方法较多,仅测试了其中一个方法,其他的没有去除,有兴趣的可以自己测试下效果。

工程的目录结构如下图所示:红色框框中的部分是此次需求需要用到的文件,每个文件都有部分说明

下面,针对每个文件进行下说明,说明的顺序和图中文件的列表顺序同:

PersonController文件:

package com.one.controller;

import com.one.entity.Person;
import com.one.service.PersonService;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

import javax.annotation.Resource;

/**
 * @Author: guopengxia
 * @Date: 2019/3/17 13:02
 * @Version: 1.0
 */
@Controller
@RequestMapping("/person")
public class PersonController {

     @Resource
     PersonService personService;

     @RequestMapping(value="/select", produces = "text/plain;charset=utf-8")
     public ModelAndView getPerson(@RequestParam("id")String id){
         Person p=personService.getPerson(Integer.parseInt(id));
         ModelAndView mav=new ModelAndView("success");
         mav.addObject("p",p);
         return mav;
     }
}

文件中的@Controller表示可以用于匹配用户请求的url信息, @RequestMapping("/person")用于匹配具体的url的值,这个字段可以分开写到类上面一部分,写到方法上一部分

如上面的实例部分,也可以直接写到方法上(@RequestMapping("/person/select")),

PersonMapper.Java文件:

package com.one.dao;

import com.one.entity.Person;

public interface PersonMapper {
    int deleteByPrimaryKey(Integer id);

    int insert(Person record);

    Person selectByPrimaryKey(Integer id); //仅仅测试了这一个方法,其他的方法有兴趣可以自己做下测试

    int updateByPrimaryKey(Person record);
}

这个接口和PersonMapper映射文件是一一对应关系,接口中的方法可以绑定到映射文件中的SQL的ID上,二映射文件PersonMapper中的namespace是PersonMapper的路径名

com.one.entity.Person.selectByPrimaryKey可以定位到映射文件中namespace=com.one.entity.Person,对应的SQL的ID=selectByPrimaryKey,就可以具体执行SQL语句了

PersonMapper.xml文件:

<?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.one.dao.PersonMapper" >
  <resultMap id="BaseResultMap" type="com.one.entity.Person" >
    <id column="id" property="id" jdbcType="INTEGER" />
    <result column="name" property="name" jdbcType="VARCHAR" />
    <result column="password" property="password" jdbcType="VARCHAR" />
    <result column="remark" property="remark" jdbcType="VARCHAR" />
  </resultMap>
  <sql id="Base_Column_List" >
    id, name, password, remark
  </sql>
  <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
    select 
    <include refid="Base_Column_List" />
    from person
    where id = #{id,jdbcType=INTEGER}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
    delete from person
    where id = #{id,jdbcType=INTEGER}
  </delete>
  <insert id="insert" parameterType="com.one.entity.Person" >
    insert into person (id, name, password, 
      remark)
    values (#{id,jdbcType=INTEGER}, #{name,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR}, 
      #{remark,jdbcType=VARCHAR})
  </insert>
  <update id="updateByPrimaryKey" parameterType="com.one.entity.Person" >
    update person
    set name = #{name,jdbcType=VARCHAR},
      password = #{password,jdbcType=VARCHAR},
      remark = #{remark,jdbcType=VARCHAR}
    where id = #{id,jdbcType=INTEGER}
  </update>
</mapper>

服务类的文件;

PersonService.java文件的内容是:

package com.one.service;

import com.one.entity.Person;
/**
 * @Author: guopengxia
 * @Date: 2019/3/17 15:08
 * @Version: 1.0
 */

public interface PersonService{

     Person getPerson(int id);
}

这个接口,主要是定义了对外提供的 接口方法,可以封装具体的操作实现,便于维护

服务接口的实现类:PersonServiceImpl.java

package com.one.service.impl;

import com.one.dao.PersonMapper;
import com.one.entity.Person;
import com.one.service.PersonService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

/**
 * @Author: guopengxia
 * @Date: 2019/3/17 13:03
 * @Version: 1.0
 */
@Service("personService")
public class PersonServiceImpl implements PersonService {

    @Resource
    PersonMapper personMapper;

    public Person getPerson(int id){
        return personMapper.selectByPrimaryKey(id);
    }
}

这个类中具体通过接口实现了业务逻辑功能,通过调用接口的方法进行查询用户的信息。

数据库信息的配置:

jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.connectionURL=jdbc:mysql://localhost:3306/fis?useUnicode=true&characterEncoding=utf-8
jdbc.userId=root
jdbc.password=####


#jdbc.driverLocation=E:\\Java\\MySQL\\mysql-connector-java-5.1.43\\mysql-connector-java-5.1.43\\mysql-connector-java-5.1.43-bin.jar
##Oracle 数据库驱动
#jdbc.driver=oracle.jdbc.driver.OracleDriver
##jdbc:mysql://连接地址:端口号(默认3306)/数据库名
#jdbc.url=jdbc:oracle:thin:@10.1.104.xx:1521:xxxx
##用户名
#jdbc.username=lis
##密码
#jdbc.password=hxkf#xxx
##连接池初始化连接
#jdbc.initialSize=10
##连接池最大连接数
#jdbc.maxActive=100
##连接池最大空闲连接
#jdbc.maxIdle=0
##连接池最小空闲连接
#jdbc.minIdle=0
##等待超时
#jdbc.maxWait=5000
#
##线程池
##------------ Task ------------
#task.core_pool_size=5
#task.max_pool_size=100
#task.queue_capacity=1000
#task.keep_alive_seconds=60

上面的没有注释部分是此次工程中需要的,下面是配置线程池的一些信息,可以自动忽略

spring-mvc.xml文件:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd  ">

    <!-- 组件扫描@Controller,@Service组件对象 -->
    <context:component-scan base-package="com.one.service.impl;com.one.controller"></context:component-scan>

    <!-- 启动SpringMVC的注解功能,完成请求和注解POJO的映射 -->
    <bean
            class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
    </bean>
    <!-- 定义跳转的文件的前后缀 ,视图模式配置 -->
    <bean
            class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/views/" />
        <property name="suffix" value=".jsp" />
    </bean>

    <!-- 注解扫描 -->
    <mvc:annotation-driven></mvc:annotation-driven>
</beans>

spring-mybatis.xml文件:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd

">

    <!-- 引入jdbc配置文件 -->
    <context:property-placeholder location="classpath:jdbc.properties" />

    <!--dbcp数据源 -->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
          destroy-method="close">
        <property name="driverClassName" value="${jdbc.driverClass}" />
        <property name="url" value="${jdbc.connectionURL}" />
        <property name="username" value="${jdbc.userId}" />
        <property name="password" value="${jdbc.password}" />

    </bean>

    <!-- 配置spring与mybatis结合 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <!-- 自动扫描mapping.xml文件 -->
        <property name="mapperLocations" value="classpath*:com/one/mapper/*.xml"/>
    </bean>
    <!-- DAO接口所在包名,Spring会自动查找其下的类 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.one.dao" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>
    <!-- Spring事务控制(注解配置) -->
    <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
    <bean id="transactionManager"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>
    <!-- 这个必须配置,否则事物不起作用 -->
    <!-- 支持@Transactional注解支持 -->
    <!-- 带有@Transactional标记的方法会自动调用txManager管理事务 -->



</beans>

这个文件中的下面是配置事务的,这次简单查询不涉及的事务,仅仅是简单的查询功能,所以可以把下面的事务自动忽略

index.jsp:

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
 <form action="index.jsp" name="fm" method="post">
    username:<input type="text" name="username"/>
    password:<input type="password" name="password"/>
    <br>
    <input type="submit" name="submit" value="提交"/>
 </form>
</body>
</html>

响应文件success.jsp:

<%@ page language="java" contentType="text/html;charset=UTF-8" %>
<html>
<head>
   <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>Title</title>
</head>
<body>
   用户信息查询成功!<br>
   用户信息是:   用户id: ${requestScope.p.id}  用户名:${requestScope.p.name}  密码:${requestScope.p.password} 备注:${requestScope.p.remark}
</body>
</html>

最后是pom.xml文件中导入的依赖jar包,问内容如下所示:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.three</groupId>
    <artifactId>testweb</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <name>testweb Maven Webapp</name>
    <!-- FIXME change it to the project's website -->
    <url>http://www.example.com</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.7</maven.compiler.source>
        <maven.compiler.target>1.7</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.2.6.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>4.2.6.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>4.2.6.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>4.2.6.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.2.6.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>commons-pool</groupId>
            <artifactId>commons-pool</artifactId>
            <version>1.5.4</version>
        </dependency>
        <!--Mybatis Spring-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.1</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.25</version>
        </dependency>
        <!--mybatis-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.4</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.40</version>
        </dependency>
        <!--slf4j-->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.25</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.3.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>4.3.9.RELEASE</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>testweb</finalName>
        <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
            <plugins>
                <plugin>
                    <artifactId>maven-clean-plugin</artifactId>
                    <version>3.1.0</version>
                </plugin>
                <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
                <plugin>
                    <artifactId>maven-resources-plugin</artifactId>
                    <version>3.0.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.8.0</version>
                </plugin>
                <plugin>
                    <artifactId>maven-surefire-plugin</artifactId>
                    <version>2.22.1</version>
                </plugin>
                <plugin>
                    <artifactId>maven-war-plugin</artifactId>
                    <version>3.2.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-install-plugin</artifactId>
                    <version>2.5.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-deploy-plugin</artifactId>
                    <version>2.8.2</version>
                </plugin>

                <!-- mybatis逆向工程 -->
                <plugin>
                    <groupId>org.mybatis.generator</groupId>
                    <artifactId>mybatis-generator-maven-plugin</artifactId>
                    <version>1.3.2</version>
                    <configuration>
                        <!--配置文件的位置-->
                        <configurationFile>src/main/resources/Personal-GeneratorConfig.xml</configurationFile>
                        <verbose>true</verbose>
                        <overwrite>true</overwrite>
                    </configuration>
                </plugin>

            </plugins>
        </pluginManagement>

        <resources>
            <resource>
                <directory>src/main/java</directory><!--所在的目录-->
                <includes><!--包括目录下的.properties,.xml文件都会扫描到-->
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>

    </build>
</project>

至此,所有的文件都已经改造完毕,下面就是进行测试部分:

1.配置IDEA中的数据库部分,如下图所示,点击IDEA中的右边database:

选择MySQL后,进行图中配置:

配置成功以后,进行tomcat的配置,配置截图如下所示:按照红色框框中的进行配置

图中的部署部分的截图如下所示:

配置完以后,点击 apply  ,最后OK即可。

下面就可以启动项目工程了,点击tomcat旁边的绿色三角,就可以启动工程了,出现篇幅一中所示结果:

http://localhost:8080/,运行后可以出现

 查询后,结果如下所示:

到此,真个项目就结束了,不过下面还有一些经常出现的常见性错误,由于篇幅问题,在单独写一份。

路径连接如下:

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转载自www.cnblogs.com/guopengxia0719/p/10553898.html