Spring+Mybatis配置

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=rootjdbc.password=12345jdbc.driverClass=com.mysql.jdbc.Driverjdbc.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