标签：ret into 需要 alias type bsp test password 接管
1.通过上两篇文章的学习,大致了解了spring和mybatis的架构和使用原理,下面这篇文章就将给出两者结合的一个小实例,通过该实例进一步探索这两个框架的魅力,工程所需要的所有jar包都在链接:http://pan.baidu.com/s/1kUZmpWb
2.spring+mybatis结合实例
(1)建立数据库mybatis,建立一张user表:
(2)建立User.java类:
package com.springMyBatis.system.model; public class User { private int id; private String username; private String password; public User() { } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String toString() { return "User[id=" + id + " , username=" + username + " , password=" + password + "]"; } }
(3)建立UserDao数据访问接口:
package com.springMyBatis.system.dao; import com.springMyBatis.system.model.User; public interface UserDao { public User getUser(User user); public void addUser(User user); public void updateUser(User user); public void deleteUser(int UserId); }
(4)建立数据访问接口映射文件:
<?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"> <mapper namespace="com.springMyBatis.system.dao.UserDao"> <select id="getUser" parameterType="User" resultType="User"> SELECT * FROM user WHERE username=#{username} AND password=#{password} </select> <insert id="addUser" parameterType="User" flushCache="true"> INSERT INTO user (id,username,password) VALUES (#{id},#{username},#{password}) </insert> <update id="updateUser" parameterType="User"> UPDATE user SET password=#{password} WHERE id=#{id} </update> <delete id="deleteUser" parameterType="int"> DELETE FROM user WHERE id=#{id} </delete> </mapper>
(5)建立mybatis配置文件:
<?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> <typeAliases> <!--这里给实体类取别名，方便在mapper配置文件中使用 --> <typeAlias alias="User" type="com.springMyBatis.system.model.User" /> </typeAliases> <mappers> <mapper resource="com/springMyBatis/system/dao/UserDao.xml" /> </mappers> </configuration>
(6)建立spring配置文件:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.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-3.0.xsd"> <!-- 配置数据源 --> <bean id="jdbcDataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName"> <value>com.mysql.jdbc.Driver</value> </property> <property name="url"> <value>jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=UTF-8 </value> </property> <property name="username"> <value>root</value> </property> <property name="password"> <value>geningchao</value> </property> </bean> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="jdbcDataSource" /> <property name="configLocation" value="classpath:mybatis-config.xml"></property> </bean> <bean id="userDao" class="org.mybatis.spring.mapper.MapperFactoryBean"> <property name="mapperInterface" value="com.springMyBatis.system.dao.UserDao"></property> <property name="sqlSessionFactory" ref="sqlSessionFactory"></property> </bean> </beans>
(7)建立测试类:
package com.springMyBatis.system.test; import java.util.Random; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.springMyBatis.system.dao.UserDao; import com.springMyBatis.system.model.User; public class UserController { public static void main(String[] args) { ApplicationContext ctx = new ClassPathXmlApplicationContext("ApplicationContext.xml"); UserDao userDao = (UserDao) ctx.getBean("userDao"); User user = new User(); // 添加两条数据 user.setId(new Random().nextInt(10000)); user.setUsername("Jessica"); user.setPassword("123"); userDao.addUser(user); user.setId(new Random().nextInt(10000)); user.setUsername("Jessica2"); user.setPassword("123"); userDao.addUser(user); System.out.println("添加成功"); // 查询数据 user.setUsername("Jessica"); user.setPassword("123"); System.out.println(userDao.getUser(user).toString()); user.setUsername("Jessica2"); user.setPassword("123"); System.out.println(userDao.getUser(user).toString()); // 修改数据 user.setId(new Random().nextInt(10000)); user.setPassword("802"); userDao.updateUser(user); System.out.println("修改成功"); // 删除数据 userDao.deleteUser(1); System.out.println("删除成功"); } }
3.工程分析
该工程包括四部分,第一部分为基本的User实体类和UserDao访问接口,第二部分为mybatis接管的数据访问接口映射文件和mybatis配置文件,接口映射文件实现所有的数据访问控制,配置文件加载映射文件;第三部分为spring配置文件,该文件包含了连接数据库,加载mybatis配置文件;第四部分就是测试类了,测试类很容易懂;整体流程就是这样,希望通过这篇文章理清spring+mybatis的流程.
以上仅是个人学习观点,若有不确之处,还请指点扶正!
标签：ret into 需要 alias type bsp test password 接管
原文地址：http://www.cnblogs.com/geningchao/p/6628376.html
