MyBatis入門09之整合spring

1、jar包準備：
【mybatis】
mybatis-3.2.0.jar
mybatis-spring-1.1.1.jar
log4j-1.2.17.jar
【spring】
spring-aop-3.2.0.RELEASE.jar
spring-beans-3.2.0.RELEASE.jar
spring-context-3.2.0.RELEASE.jar
spring-core-3.2.0.RELEASE.jar
spring-expression-3.2.0.RELEASE.jar
spring-jdbc-3.2.0.RELEASE.jar
spring-test-3.2.4.RELEASE.jar
spring-tx-3.2.0.RELEASE.jar

aopalliance-1.0.jar
cglib-nodep-2.2.3.jar
commons-logging-1.1.1.jar

【MYSQL驅動包】
mysql-connector-java-5.0.4-bin.jar

項目目錄結構：

2、數據庫表

CREATE TABLE s_user(
    user_id INT AUTO_INCREMENT PRIMARY KEY,
    user_name VARCHAR(30),
    user_birthday DATE,
    user_salary DOUBLE
)

3、實體類

package com.atguigu.day03_ms.bean;

import java.util.Date;

public class User {

    private int id;
    private String name;
    private Date birthday;
    private double salary;

    public User(int id, String name, Date birthday, double salary) {
        super();
        this.id = id;
        this.name = name;
        this.birthday = birthday;
        this.salary = salary;
    }

    public User() {
        super();
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Date getBirthday() {
        return birthday;
    }

    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }

    public double getSalary() {
        return salary;
    }

    public void setSalary(double salary) {
        this.salary = salary;
    }

    @Override
    public String toString() {
        return "User [id=" + id + ", name=" + name + ", birthday=" + birthday
                + ", salary=" + salary + "]";
    }

}

4、DAO接口: UserMapper (XXXMapper)

public interface UserMapper {

    void save(User user);
    void update(User user);
    void delete(int id);
    User findById(int id);
    List<User> findAll();
}

5、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">
<!--namespace必須是接口的全類名  -->
<mapper namespace="com.atguigu.day03_ms.mapper.UserMapper">

    <resultMap type="User" id="userResult">
        <result column="user_id" property="id"/>
        <result column="user_name" property="name"/>
        <result column="user_birthday" property="birthday"/>
        <result column="user_salary" property="salary"/>
    </resultMap>

    <!-- 取得插入數據後的id -->
    <insert id="save" keyColumn="user_id" keyProperty="id" useGeneratedKeys="true">
        insert into s_user(user_name,user_birthday,user_salary)
        values(#{name},#{birthday},#{salary})
    </insert>

    <update id="update">
        update s_user
        set user_name = #{name},
            user_birthday = #{birthday},
            user_salary = #{salary}
        where user_id = #{id}
    </update>

    <delete id="delete">
        delete from s_user
        where user_id = #{id}
    </delete>

    <select id="findById" resultMap="userResult">
        select *
        from s_user
        where user_id = #{id}
    </select>

    <select id="findAll" resultMap="userResult">
        select * 
        from s_user
    </select>
</mapper>

6、spring.xml文件：

<?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:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-3.2.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">
    <!-- 1. 數據源 : DriverManagerDataSource -->
    <bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/mybatis"/>
        <property name="username" value="root"/>
        <property name="password" value="root"/>
    </bean>

    <!-- 
        2. mybatis的SqlSession的工廠: SqlSessionFactoryBean 
            dataSource / typeAliasesPackage
           typeAliasesPackage:指定實體類的包名，自動將實體的簡單類名映射成別名
    -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="datasource"/>
        <property name="typeAliasesPackage" value="com.atguigu.day03_ms.bean"/>
    </bean>

    <!-- 
        3. mybatis自動掃描加載Sql映射文件 : MapperScannerConfigurer 
            sqlSessionFactory / basePackage
    -->
    <bean id="config" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.atguigu.day03_ms.mapper"/>
        <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
    </bean>

    <!-- 4. 事務管理 : DataSourceTransactionManager -->
    <bean id="manager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="datasource"/>
    </bean>

    <!-- 5. 使用聲明式事務 -->
    <tx:annotation-driven transaction-manager="manager" />
</beans>

7、測試代碼：

package com.atguigu.day03_ms.test;

import java.util.Date;

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.day03_ms.bean.User;
import com.atguigu.day03_ms.mapper.UserMapper;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("/beans.xml") //加載配置
public class SMTest {

    @Autowired
    private UserMapper mapper;


    @Test
    public void testAdd() {
        User user = new User(-1, "tom", new Date(), 1234);
        mapper.save(user);

        int id = user.getId();
        System.out.println(id);
    }
}