Spring与MyBatis的整合（山东数漫江湖）

首先看一下项目结构图：

具体步骤如下：

1、建立JDBC属性文件

jdbc.properties （文件编码修改为 utf-8 ）

driver=com.mysql.jdbc.Driver

url=jdbc:mysql://localhost:3306/projectview

username=root

password=729821

辅助：数据库脚本：

INSERT INTO `test_user` VALUES (1, 'liuzhonghao', '6329869', '384037404@qq.com');

INSERT INTO `test_user` VALUES (2, 'xiahe', '6329869', '12345@qq.com');

INSERT INTO `test_user` VALUES (3, NULL, NULL, NULL);

INSERT INTO `test_user` VALUES (4, '123', '123', '123');

INSERT INTO `test_user` VALUES (5, '321', '321', '321');

2、log4j的配置

#\u5B9A\u4E49LOG\u8F93\u51FA\u7EA7\u522B

log4j.rootLogger=INFO,Console,File

#\u5B9A\u4E49\u65E5\u5FD7\u8F93\u51FA\u76EE\u7684\u5730\u4E3A\u63A7\u5236\u53F0

log4j.appender.Console=org.apache.log4j.ConsoleAppender

log4j.appender.Console.Target=System.out

#\u53EF\u4EE5\u7075\u6D3B\u5730\u6307\u5B9A\u65E5\u5FD7\u8F93\u51FA\u683C\u5F0F\uFF0C\u4E0B\u9762\u4E00\u884C\u662F\u6307\u5B9A\u5177\u4F53\u7684\u683C\u5F0F

log4j.appender.Console.layout = org.apache.log4j.PatternLayout

log4j.appender.Console.layout.ConversionPattern=[%c] - %m%n

#\u6587\u4EF6\u5927\u5C0F\u5230\u8FBE\u6307\u5B9A\u5C3A\u5BF8\u7684\u65F6\u5019\u4EA7\u751F\u4E00\u4E2A\u65B0\u7684\u6587\u4EF6

log4j.appender.File =org.apache.log4j.RollingFileAppender

#\u6307\u5B9A\u8F93\u51FA\u76EE\u5F55

log4j.appender.File.File = logs/ssm.log

#\u5B9A\u4E49\u6587\u4EF6\u6700\u5927\u5927\u5C0F

log4j.appender.File.MaxFileSize = 10MB

# \u8F93\u51FA\u6240\u4EE5\u65E5\u5FD7\uFF0C\u5982\u679C\u6362\u6210DEBUG\u8868\u793A\u8F93\u51FADEBUG\u4EE5\u4E0A\u7EA7\u522B\u65E5\u5FD7

log4j.appender.File.Threshold = ALL

log4j.appender.File.layout =org.apache.log4j.PatternLayout

log4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-ddHH\:mm\:ss}][%c]%m%n

3、建立工程

（1）User类

package com.hqj.model;

public class User {

    private Integer id;

    private String username;

    private String password;

    private String email;

    public Integer getId() {

        return id;

    }

    public void setId(Integer id) {

        this.id = id;

    }

    public String getUsername() {

        return username;

    }

    public void setUsername(String username) {

        this.username = username == null ? null : username.trim();

    }

    public String getPassword() {

        return password;

    }

    public void setPassword(String password) {

        this.password = password == null ? null : password.trim();

    }

    public String getEmail() {

        return email;

    }

    public void setEmail(String email) {

        this.email = email == null ? null : email.trim();

    }

    public User() {

        super();

        // TODO Auto-generated constructor stub

    }

    public User(Integer id, String username, String password, String email) {

        super();

        this.id = id;

        this.username = username;

        this.password = password;

        this.email = email;

    }

    @Override

    public String toString() {

        return "User [id=" + id + ", username=" + username + ", password="

                + password + ", email=" + email + "]";

    }

}

（2）UserMapper类（Mybatis中的DAO类）

package com.hqj.dao;

import com.hqj.model.User;

public interface UserMapper {

    int deleteByPrimaryKey(Integer id);

    int insert(User record);

    int insertSelective(User record);

    User selectByPrimaryKey(Integer id);

    int updateByPrimaryKeySelective(User record);

    int updateByPrimaryKey(User record);

}

（3）UserMapper类（Mybatis映射文件）

<?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.hqj.dao.UserMapper" >

  <resultMap id="BaseResultMap" type="com.hqj.model.User" >

    <id column="id" property="id" jdbcType="INTEGER" />

    <result column="username" property="username" jdbcType="VARCHAR" />

    <result column="password" property="password" jdbcType="VARCHAR" />

    <result column="email" property="email" jdbcType="VARCHAR" />

  </resultMap>

  <sql id="Base_Column_List" >

    id, username, password, email

  </sql>

  <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >

    select

    <include refid="Base_Column_List" />

    from test_user

    where id = #{id,jdbcType=INTEGER}

  </select>

  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >

    delete from test_user

    where id = #{id,jdbcType=INTEGER}

  </delete>

  <insert id="insert" parameterType="com.hqj.model.User" >

    insert into test_user (id, username, password,

      email)

    values (#{id,jdbcType=INTEGER}, #{username,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR},

      #{email,jdbcType=VARCHAR})

  </insert>

  <insert id="insertSelective" parameterType="com.hqj.model.User" >

    insert into test_user

    <trim prefix="(" suffix=")" suffixOverrides="," >

      <if test="id != null" >

        id,

      </if>

      <if test="username != null" >

        username,

      </if>

      <if test="password != null" >

        password,

      </if>

      <if test="email != null" >

        email,

      </if>

    </trim>

    <trim prefix="values (" suffix=")" suffixOverrides="," >

      <if test="id != null" >

        #{id,jdbcType=INTEGER},

      </if>

      <if test="username != null" >

        #{username,jdbcType=VARCHAR},

      </if>

      <if test="password != null" >

        #{password,jdbcType=VARCHAR},

      </if>

      <if test="email != null" >

        #{email,jdbcType=VARCHAR},

      </if>

    </trim>

  </insert>

  <update id="updateByPrimaryKeySelective" parameterType="com.hqj.model.User" >

    update test_user

    <set >

      <if test="username != null" >

        username = #{username,jdbcType=VARCHAR},

      </if>

      <if test="password != null" >

        password = #{password,jdbcType=VARCHAR},

      </if>

      <if test="email != null" >

        email = #{email,jdbcType=VARCHAR},

      </if>

    </set>

    where id = #{id,jdbcType=INTEGER}

  </update>

  <update id="updateByPrimaryKey" parameterType="com.hqj.model.User" >

    update test_user

    set username = #{username,jdbcType=VARCHAR},

      password = #{password,jdbcType=VARCHAR},

      email = #{email,jdbcType=VARCHAR}

    where id = #{id,jdbcType=INTEGER}

  </update>

</mapper>

（4）UserService类（Spring中对应的类接口）

package com.hqj.service;

import com.hqj.model.User;

public interface UserService {

    public User getUserById(Integer id);

}

（5）UserServiceImpl类（Spring中对应的类接口的实现）

务必先看图片中的红字！易错点！！！
务必先看图片中的红字！易错点！！！
务必先看图片中的红字！易错点！！！

package com.hqj.serviceimpl;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

import com.hqj.dao.UserMapper;

import com.hqj.model.User;

import com.hqj.service.UserService;

@Service("userService")

public class UserServiceImpl implements UserService {

    @Autowired

    private UserMapper userMapper;

    public User getUserById(Integer id) {

        // TODO Auto-generated method stub

        return userMapper.selectByPrimaryKey(id);

    }

    public UserMapper getUserMapper() {

        return userMapper;

    }

    public void setUserMapper(UserMapper userMapper) {

        this.userMapper = userMapper;

    }

}

（6）测试类

务必先看图片中的红字！易错点！！！
务必先看图片中的红字！易错点！！！
务必先看图片中的红字！易错点！！！

package com.hqj.test;

import org.junit.Test;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.hqj.model.User;

import com.hqj.service.UserService;

public class test1 {

    @Test

    public void testsearch() {

        ApplicationContext ctx = null;

        ctx = new ClassPathXmlApplicationContext("spring-mybatis.xml");

        UserService userService = (UserService) ctx.getBean("userService");

        User user = userService.getUserById(1);

        System.out.println(user);

    }

}

（7）spring-mybatis.xml配置文件（最重要的配置）

务必先看图片中的红字！易错点！！！
务必先看图片中的红字！易错点！！！
务必先看图片中的红字！易错点！！！

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"

    xmlns:context="http://www.springframework.org/schema/context"

    xmlns:mvc="http://www.springframework.org/schema/mvc"

    xsi:schemaLocation="http://www.springframework.org/schema/beans

 http://www.springframework.org/schema/beans/spring-beans-3.1.xsd

 http://www.springframework.org/schema/context

 http://www.springframework.org/schema/context/spring-context-3.1.xsd

 http://www.springframework.org/schema/mvc

 http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">

    <!-- 自动扫描 -->

    <context:component-scan base-package="com.hqj.serviceimpl" />

    <!-- 引入配置文件 -->

    <bean id="propertyConfigurer"

        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">

        <property name="location" value="classpath:jdbc.properties" />

    </bean>

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"

        destroy-method="close">

        <property name="driverClassName" value="${driver}" />

        <property name="url" value="${url}" />

        <property name="username" value="${username}" />

        <property name="password" value="${password}" />

    </bean>

    <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->

    <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/hqj/mapping/*.xml"></property>

    </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.hqj.dao" />

        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>

    </bean>

    <!-- (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>

</beans>

测试成功的结果如下：

巴特西

Spring与MyBatis的整合（山东数漫江湖）

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