spring与Mybatis集成

Spring集成Mybatis

创建Maven项目

1.配置pom.xml添加依赖

<?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.mage</groupId>
    <artifactId>0317-spring-mybatis</artifactId>
    <version>1.0-SNAPSHOT</version>
    <name>0317-spring-mybatis</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>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>
        <!-- spring 核心jar -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.3.2.RELEASE</version>
        </dependency>
        <!-- spring 测试jar -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>4.3.2.RELEASE</version>
        </dependency>
        <!-- spring jdbc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.3.2.RELEASE</version>
        </dependency>
        <!-- spring事物 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>4.3.2.RELEASE</version>
        </dependency>
        <!-- c3p0 连接池 -->
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
        </dependency>
        <!-- mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.1</version>
        </dependency>
        <!-- 添加mybatis与Spring整合的核心包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>
        <!-- mysql 驱动包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.39</version>
        </dependency>
        <!-- 日志打印相关的jar -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.2</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.2</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.6</version>
        </dependency>
    </dependencies>
    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.xml</include>
                    <include>**/*.properties</include>
                </includes>
            </resource>
        </resources>
    </build>
</project>

2.在项目的 src/main/resources 下创建 spring.xml 文件， 内容如下

<?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:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       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/tx
        http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd">

    <context:component-scan base-package="com.mage.mybatis"/>
    <context:property-placeholder location="classpath:db.properties"/>
    <tx:annotation-driven  transaction-manager="txManager"/>
    <aop:aspectj-autoproxy/>
    <!-- 配置c3p0 数据源  -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver}"></property>
        <property name="jdbcUrl" value="${jdbc.url}"></property>
        <property name="user" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
	
    <bean id="txManager"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!--  整合 框架（Spring与Mybatis）  -->
    <!-- 配置 sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 数据源 -->
        <property name="dataSource" ref="dataSource"></property>
        <!-- 框架的配置文件 -->
        <property name="configLocation" value="classpath:mybatis.xml" />
        <!-- 映射文件 -->
        <property name="mapperLocations" value="classpath:com/mage/mybatis/mapper/*.xml" />
    </bean>
    <!-- 配置扫描器 -->
    <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 扫描com.mage.dao这个包以及它的子包下的所有映射接口类 -->
        <property name="basePackage" value="com.mage.mybatis.dao" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
    </bean>
</beans>

3.在项目的 src/main/resources 下创建 mybatis.xml 文件， 内容如下

<?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">
<!-- 添加数据库连接相关配置信息 -->
<configuration>
    <settings>
        <setting name="cacheEnabled" value="true"/>
    </settings>
    <typeAliases>
        <package name="com.mage.mybatis.vo"/>
    </typeAliases>
</configuration>

4.在项目的 src/main/resources 下创建 db.properties 文件，内容如下(mysql 创建数据库)

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/crm?useUnicode=true&characterEncoding=utf-8&useSSL=false
jdbc.username=root
jdbc.password=123456

5.在项目的 src/main/resources 下创建 log4j.properties 文件，内容如下

# 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
log4j.logger.java.sql.ResultSet=INFO
log4j.logger.org.apache=INFO
log4j.logger.java.sql.Connection=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG

6.在项目的 src/main/java 下创建对应的包结构

com.mage.mybatis.vo

com.mage.mybatis.dao

com.mage.mybatis.mapper

com.mage.mybatis.service

7.在com.mage.mybatis.vo 包下创建 JavaBean 文件 User.java (要与数据库字段对应)

package com.mage.mybatis.vo;

import java.io.Serializable;
public class User implements Serializable {

    private Integer id;
    private String userName;
    private String trueName;
    private Role role;
    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;
    }
    public String getTrueName() {
        return trueName;
    }
    public void setTrueName(String trueName) {
        this.trueName = trueName;
    }
    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", userName='" + userName + '\'' +
                ", trueName='" + trueName + '\'' +
                ", role=" + role +
                '}';
    }
}

8.com.mage.mybatis.dao 包下创建 UserService01.java 文件，提供对应的用户详情查询功能

package com.mage.mybatis.dao;


import com.mage.mybatis.vo.User;

public interface UserService01 {
    public User queryUserById(int id);
}

9.com.mage.mybatis.mapper 包下创建 UserMapper.xml 文件，提供select 查询标签配置

<?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.mage.mybatis.dao.UserDao01">
    <resultMap id="userBase" type="user">
        <id column="id" property="id"/>
        <result column="user_name" property="userName"/>
        <result column="true_name" property="trueName"/>
        <association property="role" column="roleId" select="queryRoleById"/>
    </resultMap>
    <select id="queryUserById" parameterType="int" resultMap="userBase">
        select * from t_user where id=#{id}
    </select>
</mapper>

10.com.mage.mybatis.service 包下创建 UserService01.java 文件，提供用户详情查询方法

package com.mage.mybatis.service;
import com.mage.mybatis.dao.UserDao01;
import com.mage.mybatis.vo.User;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
@Service
public class UserService01 {
    @Resource
    private UserDao01 userDao01;
    public User queryUserById(Integer userId){
        return  userDao01.queryUserById(userId);
    }
}

11.测试

package com.mage;

import com.mage.mybatis.service.UserService01;
import com.mage.mybatis.vo.User;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class App {
    public static void main( String[] args ) {
        ApplicationContext applicationContext= new ClassPathXmlApplicationContext("spring.xml");
        UserService01 userService01 = (UserService01)applicationContext.getBean("userService01");
        User user = userService01.queryUserById(10);
        System.out.println(user);
    }
}

12.结果

User{id=10, userName='mage', trueName='bjmage', role=null}