SSM(7)-mybaits整合

分三步走：
1.导入jar包：
2.写配置文件：mybatis-config.xml和mapper映射文件
3,JAVA类实现与调用

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1.导入jar包： 1.1junit 1.2mybatis 1.3mysql-connector-java 1.4spring相关 1.5aspectJ AOP 织入器 1.6mybatis-spring整合包

2.写配置文件：mybatis-config.xml和mapper映射文件
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>

   <typeAliases>
       <package name="com.tang.pojo"/>
   </typeAliases>

   <environments default="development">
       <environment id="development">
           <transactionManager type="JDBC"/>
           <dataSource type="POOLED">
               <property name="driver" value="com.mysql.jdbc.Driver"/>
               <property name="url" value="jdbc:mysql://localhost:3306/mybatis?useSSL=true&amp;useUnicode=true&amp;characterEncoding=utf8"/>
               <property name="username" value="root"/>
               <property name="password" value="123456"/>
           </dataSource>
       </environment>
   </environments>

   <mappers>
       <package name="com.tang.dao"/>
   </mappers>
</configuration>

<?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.tang.dao.UserMapper">

   <select id="selectUser" resultType="User">
    select * from user
   </select>

</mapper>

3,JAVA类实现与调用
 

package com.tang.pojo;

public class User {
   private int id;        //id
   private String name;   //姓名
   private String pwd;   //密码
}
public interface UserMapper {
   public List<User> selectUser();
}




//测试类
@Test
public void selectUser() throws IOException {

   String resource = "mybatis-config.xml";
   InputStream inputStream = Resources.getResourceAsStream(resource);
   SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
   SqlSession sqlSession = sqlSessionFactory.openSession();

   UserMapper mapper = sqlSession.getMapper(UserMapper.class);

   List<User> userList = mapper.selectUser();
   for (User user: userList){
       System.out.println(user);
  }

   sqlSession.close();
}