Spring+Mybatis配置

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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" />  <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>