Spring + mybatis整合方案总结 结合实例应用

冰恋

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  ： 苏若年              <a href="mailto:DennisIT@163.com">发送邮件</a>
*   
*  @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;
/**
*
*
*  @version ： 1.0
*  
*  @author  ： 苏若年              <a href="mailto:DennisIT@163.com">发送邮件</a>
*   
*  @since   ： 1.0        创建时间:    2013-4-9    上午11:36:34
*     
*  @function： TODO        
*
*/
public interface UserDao {
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);
}


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&amp;characterEncoding=UTF-8&amp;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  ： 苏若年              <a href="mailto:DennisIT@163.com">发送邮件</a>
*   
*  @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  ： 苏若年              <a href="mailto:DennisIT@163.com">发送邮件</a>
*   
*  @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用例 

package com.icreate.service;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
import com.icreate.entity.User;

/**
*
*
*  @version ： 1.0
*  
*  @author  ： 苏若年              <a href="mailto:DennisIT@163.com">发送邮件</a>
*   
*  @since   ： 1.0        创建时间:    2013-4-9    下午05:16:28
*     
*  @function： TODO        
*
*/
public class SpringBatis {
ApplicationContext context = null;
UserService userService = null;
@Before
public void initContext(){
this.context = new FileSystemXmlApplicationContext("WebRoot/WEB-INF/applicationContext.xml");
this.userService = (UserService) context.getBean("userService");
}

@Test
public void countAll(){
System.out.println("数据库中的记录条数:"  + userService.countAll());
}
@Test
public void insert(){
User user = new User();
user.setUsername("苏若年");
user.setPassword("passtest");
user.setEmail("dennisit@163.com");
user.setSex("男");
user.setAge(23);
userService.insert(user);
}
@Test
public void selectAll(){
List<User> list = userService.selectAll();
for(int i=0; i<list.size(); i++){
User user = list.get(i);
System.out.println("用户名:" + user.getUsername() + "\t密码:" + user.getPassword() + "\t邮箱：" + user.getEmail());
}
}
@Test
public void update(){
User user = new User();
user.setUsername("苏若年");
user.setPassword("xxxxxxxx");
user.setEmail("xxxxxx@163xxx");
user.setSex("男");
user.setAge(23);
userService.update(user);
}
@Test
public void delete(){
userService.delete("苏若年");
}
@Test
public void findByName(){
User user = userService.findByUserName("苏若年");
System.out.println("用户名:" + user.getUsername() + "\t密码:" + user.getPassword() + "\t邮箱：" + user.getEmail());
}
}


 
方案二:使用注解整合
这次将配置文件放置在config目录下.

数据库表与实体类同上
数据dao接口定义

package com.icreate.dao;
import java.util.List;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;
import com.icreate.entity.User;
/**
*
*
*  @version ： 1.0
*  
*  @author  ： 苏若年              <a href="mailto:DennisIT@163.com">发送邮件</a>
*   
*  @since   ： 1.0        创建时间:    2013-4-9    上午11:36:34
*     
*  @function： TODO        
*
*/
public interface UserDao {
@Insert("insert into tb_user(username,password,email,sex,age) values(#{username},#{password},#{email},#{sex},#{age})")
public int insert(User user);
@Update("update tb_user set username=#{username},password=#{password},email=#{email},sex=#{sex},age=#{age} where username=#{username}")
public int update(User user);
@Delete("delete from tb_user where username=#{username}")
public int delete(String userName);
@Select("select * from tb_user ")
public List<User> selectAll();
@Select("select count(*) from tb_user")
public int countAll();
@Select("select * from tb_user where username=#{username}")
public User findByUserName(String userName);
}


Service接口与实现不变.
Spring配置文件内容如下 

<?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: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&amp;characterEncoding=UTF-8&amp;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="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>


Web.xml文件配置如下

<?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>classpath: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>


测试类大致上没有变化,只是ApplicationContext初始化的方法改变成了下面方式

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


至此我们Spring与mybatis整合实例应用演示完毕
转载请注明出处:[http://www.cnblogs.com/dennisit/archive/2013/04/10/3012972.html]