Spring + mybatis整合实例应用

项目结构图 (Spring3.0.2 +mybatis3.0.4)



方案一: 通过配置文件整合Spring和mybatis
应用数据库

--
--数据库 tb_user
--

drop table if exists tb_user;

create table tb_user(
id int primary key auto_increment comment '主键',
username varchar(40) not null unique comment '用户名',
password varchar(40) not null comment '密码',
email varchar(40) comment '邮件',
age int  comment '年龄',
sex char(2) not null comment '性别'
);

对应的实体类

package com.icreate.entity;
/**
*  @version ： 1.0
*  @author  ：
*  @since   ： 1.0        创建时间:    2013-4-9    上午11:15:50*
*  @function： TODO
*
*/
public class User {

private int id;
private String username;
private String password;
private String sex;
private String email;
private int age;

//getter() and  setter ()
}

数据Dao接口

package com.icreate.dao;

import java.util.List;

import com.icreate.entity.User;

/**
*
*/
public interface UserDao {

public int insert(User user);

public int update(User user);

public int delete(String userName);

public List selectAll();

public int countAll();

public User findByUserName(String userName);

}

在config目录下进行Mapper文件配置

<?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.icreate.dao.UserDao">
<select id="countAll" resultType="int">  <!-- 查询表中记录总数 -->
select count(*) c from tb_user;
</select>

<select id="selectAll" resultType="com.icreate.entity.User">    <!-- 查询表中的所有用户 -->
select * from tb_user order by username asc
</select>

<insert id="insert" parameterType="com.icreate.entity.User">    <!-- 向数据库中插入用户 -->
insert into tb_user(username,password,email,sex,age) values(#{username},#{password},#{email},#{sex},#{age})
</insert>

<update id="update" parameterType="com.icreate.entity.User">     <!-- 更新库中的用户 -->
update tb_user set username=#{username},password=#{password},email=#{email},sex=#{sex},age=#{age} where username=#{username}
</update>

<delete id="delete" parameterType="String">    <!-- 删除用户 -->
delete from tb_user where username=#{username}
</delete>

<select id="findByUserName" parameterType="String" resultType="com.icreate.entity.User"> <!-- 根据用户名查找用户 -->
select * from tb_user where username=#{username}
</select>
</mapper>

Mybatis应用配置文件MyBatis-Configuration.xml

<?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">
<configuration>
<mappers>
<mapper resource="com/icreate/dao/UserDao.xml"/>
</mappers>
</configuration>

Spring配置文件,本例中我们放在/WebRoot/WEB-INF/applicationContext.xml

<?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"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"> 
<!-- 配置数据源 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://localhost:3306/db_mybatis?useUnicode=
true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull"></property>
<property name="username" value="root"></property>
<property name="password" value="root"></property>
</bean>

<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="configLocation" value="classpath:MyBatis-Configuration.xml"></property>
<property name="dataSource" ref="dataSource" />
</bean>

<bean id="userDao" class="org.mybatis.spring.mapper.MapperFactoryBean">
<property name="mapperInterface" value="com.icreate.dao.UserDao"></property>
<property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
</bean>

<bean id="userService" class="com.icreate.service.impl.UserServiceImpl">
<property name="userDao" ref="userDao"></property>
</bean>

</beans>

同目录下的web.xml文件进行如下配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> 
<context-param>
<param-name>contextConfigLocation</param-name>
<!-- applicationContext.xml文件在/WEB-INF/目錄下時可以這樣配置,-->
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>

<!-- 配置上下文监听 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

配置说明:
<context-param/> 节点配置contextConfigLocation属性是为了让ContextLoaderListener找到Spring上下文的位置并加载它，如果不指定contextConfigLocation，ContextLoaderListener会到/WEB-INF/目录下找applicationContext.xml来加载。
<listener/> 节点上配了ContextLoaderListener。它实现了ServletContextListener接口，所以web server启动时ContextLoaderListener能读取到ServletContext，也就能通过<context-param/>指定的Spring上下文的路径来找到上下文并加载它。
当然，如果你不需要Spring来管理你的Bean，可以去掉上面两个节点。
定义service接口
package com.icreate.service;

import java.util.List;

import com.icreate.entity.User;

/**
*
* @version ： 1.0
* @author ：
* @since ： 1.0 创建时间: 2013-4-9 下午03:52:07
* @function： TODO
*
*/
public interface UserService {

public int insert(User user);

public int update(User user);

public int delete(String userName);

public List<User> selectAll();

public int countAll();

public User findByUserName(String userName);
}

实现service接口,执行dao操作

package com.icreate.service.impl;

import java.util.List;

import com.icreate.dao.UserDao;
import com.icreate.entity.User;
import com.icreate.service.UserService;

/**
* @version ： 1.0
* @author ：
* @since ： 1.0 创建时间: 2013-4-9 下午03:53:26
* @function： TODO
*
*/
public class UserServiceImpl implements UserService{

private UserDao userDao;

public UserDao getUserDao() {
return userDao;
}

public void setUserDao(UserDao userDao) {
this.userDao = userDao;
}

public int countAll() {
return this.userDao.countAll();
}

public int delete(String userName) {
return this.userDao.delete(userName);
}

public User findByUserName(String userName) {
return this.userDao.findByUserName(userName);
}

public int insert(User user) {
return this.userDao.insert(user);
}

public List<User> selectAll() {
return this.userDao.selectAll();
}

public int update(User user) {
return this.userDao.update(user);
}

}

接下来写我们的测试:

package com.icreate.service;

import java.util.List;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;

import com.icreate.entity.User;

/**
* 测试实例
*
* @author 我的账号
*/
public class SpringBatis {
ApplicationContext context = null;
UserService userService = null;

public void initContext() {
this.context = new FileSystemXmlApplicationContext(
"WebRoot/WEB-INF/applicationContext.xml");
this.userService = (UserService) context.getBean("userService");
}

public void countAll() {
System.out.println("数据库中的纪录条数:" + userService.countAll());
}

public void insert() {
User user = new User();
user.setUsername("马晓苏");
user.setPassword("123456");
user.setEmail("maxiaosu@qq.com");
user.setSex("男");
user.setAge(23);
userService.insert(user);
}

public void selectAll() {
List<User> list = userService.selectAll();
for (int i = 0; i < list.size(); i++) {
User user = list.get(i);
System.err.println("用户名:" + user.getUsername() + "\t 密码:"
+ user.getPassword());
}
}

public void update() {
User user = new User();
user.setUsername("马若年");
user.setPassword("xxxxxxxxxxx");
user.setEmail("xxxxxxxxx@qq.com");
user.setSex("男");
user.setAge(23);
userService.update(user);
}

public void delete() {
userService.delete("马若年");
}

public void findByName() {
User user = userService.findByUserName("马若年");
System.out.println("用户名:" + user.getUsername() + "\t密码:"
+ user.getPassword() + "\t邮箱：" + user.getEmail());
}

/**
* 入口
* @param args
*/
public static void main(String[] args) {
SpringBatis sp = new SpringBatis();
sp.initContext();
sp.insert();
}
}