Spring+Mybatis配置

Spring+Mybatis配置

之前做项目的时候用到了spring+mybatis框架，一直想抽空整理一下

Mybatis:

mybatis是支持普通 SQL查询，存储过程和高级映射的优秀持久层框架。MyBatis 消除了几乎所有的JDBC代码和参数的手工设置以及结果集的检索。MyBatis 使用简单的 XML或注解用于配置和原始映射，将接口和 Java 的POJOs（Plain Old Java Objects，普通的 Java对象）映射成数据库中的记录。

Spring:

spring是J2EE应用程序框架，是轻量级的IoC和AOP的容器框架，主要是针对javaBean的生命周期进行管理的轻量级容器。

开始整合spring和mybais

1.在IDEA中新建一个spring项目（或在Eclipse中建立一个web项目），需要导入如下jar文件。

将需要的jar包粘贴复制到lib下，复制完之后不能立马使用，可以看到复制之后并没有三角形符号，需要到File--ProjectStructure--Libraries---添加

2.创建一个数据库（spring）和一个表（user）

3.在项目中进行配置

model---User

package model;


public class User {
private  int id;
private  String name;
private  int age;

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 int getAge() {
    return age;
}

public void setAge(int age) {
    this.age = age;
}
}

model--UserDao

package dao;

import 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);
}

model--Main

package model;

import dao.UserDao;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;


public class Main {
public static void main(String[] args){
    User user=new User();
    user.setId(1);
    user.setName("jane");
    user.setAge(11);
    ApplicationContext ctx=new ClassPathXmlApplicationContext("ApplicationContext.xml");
    UserDao userDao= (UserDao) ctx.getBean("userDao");
    userDao.addUser(user);
    System.out.println("添加成功");

}
}

4.spring配置文件--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: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">

<context:property-placeholder location="classpath:spring-jdbc.properties" />
<!-- 配置数据源 -->
<bean id="jdbcDataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource" >
    <property name="username" value="${jdbc.user}"></property>
    <property name="password" value="${jdbc.password}"></property>
    <property name="driverClassName" value="${jdbc.driverClass}"></property>
    <property name="url" value="${jdbc.jdbcUrl}"></property>

</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="jdbcDataSource"></property>
    <property name="configLocation" value="classpath:mybatis-config.xml"></property>
</bean>
<bean id="userDao" class="org.mybatis.spring.mapper.MapperFactoryBean">
        <property name="mapperInterface" value="dao.UserDao"></property>
        <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
</bean>
</beans>

spring-jdbc.properties

jdbc.user=root
jdbc.password=12345
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.jdbcUrl=jdbc:mysql://localhost:3306/spring?useSSL=false

5.mybatis配置文件-mybatis-config.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="UserDao.xml"/>
</mappers>
</configuration>

UserDao.xml

<?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="dao.UserDao">
<select id="getUser" parameterType="model.User" resultType="model.User">
    SELECT * FROM user WHERE  age=#{age}
</select>
<insert id="addUser" parameterType="model.User" flushCache="true">
    INSERT into user (id,name,age)VALUES (#{id},#{name},#{age})
</insert>
<update id="updateUser" parameterType="model.User">
    UPDATE SET user name=#{name} WHERE  id=#{id}
</update>
<delete id="deleteUser" parameterType="int">
       DELETE  FROM user WHERE id=#{id}
</delete>
</mapper>	

6.测试一下

运行model--Main方法，可以看到数据库中添加了一条记录