使用Eclipse，Maven简单搭建Spring+MyBatis

<groupId>javax.servlet</groupId>

<artifactId>javax.servlet-api</artifactId>

<version>3.1.0</version>

<!-- 只在编译和测试时运行 -->

<scope>provided</scope>

</dependency>

<!-- 使用junit4 -->

<dependency>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

<version>4.11</version>

<scope>test</scope>

</dependency>

<dependency>

<groupId>javax.servlet</groupId>

<artifactId>javax.servlet-api</artifactId>

<version>3.1.0</version>

<!-- 只在编译和测试时运行 -->

<scope>provided</scope>

</dependency>

<!-- 补全项目依赖 -->

<!-- 1:日志

slf4j是规范/接口

日志实现:log4j,logback,common-logging

这里使用:slf4j + log4j

-->

<dependency>

<groupId>org.slf4j</groupId>

<artifactId>slf4j-log4j12</artifactId>

<version>1.7.2</version>

</dependency>

<!-- 2:数据库相关依赖 -->

<dependency>

<groupId>mysql</groupId>

<artifactId>mysql-connector-java</artifactId>

<version>5.1.39</version>

<scope>runtime</scope>

</dependency>

<!-- c3p0数据库连接池 -->

<dependency>

<groupId>c3p0</groupId>

<artifactId>c3p0</artifactId>

<version>0.9.1.2</version>

</dependency>

<!-- 3:DAO框架依赖：MyBatis依赖 -->

<dependency>

<groupId>org.mybatis</groupId>

<artifactId>mybatis</artifactId>

<version>3.3.0</version>

</dependency>

<!-- MyBatis自身实现的spring整合依赖 -->

<dependency>

<groupId>org.mybatis</groupId>

<artifactId>mybatis-spring</artifactId>

<version>1.2.3</version>

</dependency>

<!-- 4:spring依赖 -->

<!-- 1) spring核心依赖-->

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-core</artifactId>

<version>4.1.7.RELEASE</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-beans</artifactId>

<version>4.1.7.RELEASE</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-context</artifactId>

<version>4.1.7.RELEASE</version>

</dependency>

<!-- 2) spring dao层依赖-->

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-jdbc</artifactId>

<version>4.1.7.RELEASE</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-tx</artifactId>

<version>4.1.7.RELEASE</version>

</dependency>

</dependencies>

CREATE DATABASE sm_project;

USE sm_project;

--创建用户表

CREATE TABLE tb_user(

`user_id`                            INT PRIMARY KEY AUTO_INCREMENT COMMENT ‘用户ID‘,

`user_name`       VARCHAR(30) COMMENT ‘用户名‘,

`user_birthday`   DATE COMMENT ‘用户生日‘,

`user_salary`              DOUBLE COMMENT ‘用户工资‘

)ENGINE=InnoDB DEFAULT CHARSET=UTF8 COMMENT=‘用户表‘;

public class User implements Serializable {

private int id;

private String name;

private Date birthday;

private double salary;

//setter()/getter()/toString()略

}

public void insert(User user);

public void delete(int id);

public void update(User user);

public User findById(int id);

public List<User> findAll();

}

<!DOCTYPE mapper

PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"

"http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<!-- 其中命名空间指向与该文件同名的DAO层接口 -->

<mapper namespace="com.study.dao.IUserDAO">

<!-- 通过resultMap解决实体类属性与数据库字段名不一致的问题 -->

<resultMap type="com.study.entity.User" id="userResult">

<!--

其中id为主键，result为普通字段

property对应实体类属性，column对应字段名（更准确的说应该是查询结果集中的字段名）

-->

<id property="id" column="user_id"/>

<result property="name" column="user_name"/>

<result property="birthday" column="user_birthday"/>

<result property="salary" column="user_salary"/>

</resultMap>

<!-- 插入数据后获得自增主键的值 -->

<insert id="insert" keyProperty="id" keyColumn="user_id">

INSERT INTO tb_user

(user_name,user_birthday,user_salary)

VALUES

(#{name},#{birthday},#{salary})

</insert>

<!-- 修改用户内容 -->

<update id="update">

UPDATE tb_user

SET

user_name=#{name},

user_birthday=#{birthday},

user_salary=#{salary}

WHERE

user_id=#{id}

</update>

<!-- 根据id删除用户 -->

<delete id="delete">

DELETE FROM tb_user WHERE user_id=#{id}

</delete>

<!-- 根据id查询用户 -->

<select id="findById" resultMap="userResult">

SELECT user_id,user_name,user_birthday,user_salary FROM tb_user WHERE user_id=#{id}

</select>

<!-- 查询所有用户 -->

<select id="findAll" resultMap="userResult">

SELECT user_id,user_name,user_birthday,user_salary FROM tb_user

</select>

</mapper>

<!DOCTYPE configuration

PUBLIC "-//mybatis.org//DTD Config 3.0//EN"

"http://mybatis.org/dtd/mybatis-3-config.dtd">

<configuration>

<!-- 配置全局属性 -->

<settings>

<!-- 使用jdbc的getGeneratedKeys获取数据库自增主键值 -->

<setting name="useGeneratedKeys" value="true"/>

<!-- 使用列别名替换列名 默认:true -->

<setting name="useColumnLabel" value="true"/>

<!-- 开启驼峰命名转换 -->

<setting name="mapUnderscoreToCamelCase" value="true"/>

</settings>

</configuration>

<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"

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">

<!-- 配置整合MyBatis -->

<!-- 1:配置数据库相关参数 properties属性：${url} -->

<context:property-placeholder location="classpath:jdbc.properties" />

<!-- 2:数据库连接池 -->

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">

<!-- 配置连接池属性 -->

<property name="driverClass" value="${jdbc.driver}" />

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

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

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

<!-- c3p0连接池的私有属性 -->

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

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

<!-- 关闭连接后不自动commit -->

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

<!-- 获取连接超时时间 -->

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

<!-- 当获取连接失败重试次数 -->

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

</bean>

<!-- spring + MyBatis 精华 -->

<!-- 约定大于配置 -->

<!-- 3:配置SqlSessionFactory对象 -->

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">

<!-- 注入数据库连接池 -->

<property name="dataSource" ref="dataSource"/>

<!-- 配置MyBatis全局配置文件：mybatis-config.xml -->

<property name="configLocation" value="classpath:mybatis-config.xml"/>

<!-- 扫描entity包 使用别名 org.asset.entity.User -> User -->

<property name="typeAliasesPackage" value="com.study.entity"/>

<!-- 扫描sql配置文件:mapper需要的xml文件 -->

<property name="mapperLocations" value="classpath:mapper/*.xml"/>

</bean>

<!-- 4:配置扫描DAO接口包，动态实现DAO接口，并注入到spring容器中 -->

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">

<!-- 给出需要扫描DAO接口包 -->

<property name="basePackage" value="com.study.dao"/>

<!-- 注入sqlSessionFactory -->

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

</bean>

</beans>

jdbc.driver=com.mysql.jdbc.Driver

jdbc.url=jdbc:mysql://localhost:3306/sm_project?useUnicode=true&characterEncoding=utf-8

jdbc.username=root

jdbc.password=

maxPoolSize=30

minPoolSize=10

autoCommitOnClose=false

checkoutTimeout=1000

acquireRetryAttempts=2

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

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

log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %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

import java.util.Date;

import java.util.List;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

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

import org.springframework.test.context.ContextConfiguration;

import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.study.entity.User;

@RunWith(SpringJUnit4ClassRunner.class)

@ContextConfiguration({"classpath:spring-mybatis.xml"})

public class IUserDAOTest {

private Logger logger = LoggerFactory.getLogger(IUserDAOTest.class);

@Autowired

private IUserDAO userDAO;

@Test

public void testInsert() {

User user = new User();

user.setBirthday(new Date());

user.setName("James");

user.setSalary(15000.0);

this.userDAO.insert(user);

logger.info("insert the user={}",user);

this.userDAO.delete(user.getId());

User u = this.userDAO.findById(user.getId());

logger.info("after delete the user={}", u);

}

@Test

public void testUpdate() {

User user = new User();

user.setBirthday(new Date());

user.setName("Daniel");

user.setSalary(13000.0);

logger.info("before update the user={}", user);

this.userDAO.insert(user);

user.setSalary(22000.0);

this.userDAO.update(user);

User u = this.userDAO.findById(user.getId());

logger.info("after update the user={}", u);

this.userDAO.delete(u.getId());

}

@Test

public void testFindAll() {

List<User> users = this.userDAO.findAll();

logger.info("all the users={}", users);

}

}

2017-08-24 15:21:06,825 [main] INFO  [com.study.dao.IUserDAOTest] - after delete the user=null