mybatis 注解

一、mybatis.xml

• <mapper>中使用<package/>

 

二、mapper.java接口

• public interface StudentMapper2 {
•       @Select("select * from stu")
•       List<Student> selAll();
• }

 

三、Test中調用

• StudentMapper2 sm = session.getMapper(StudentMapper2.class);
• List<Student> list = sm.selAll();

 

四、多值傳遞（用#{param1},#{param2},#{param3}。不能用#{0},#{1},#{2}）

package top.woldcn.mapper;

 

import java.util.List;

import org.apache.ibatis.annotations.Delete;

import org.apache.ibatis.annotations.Insert;

import org.apache.ibatis.annotations.Select;

import org.apache.ibatis.annotations.Update;

import top.woldcn.entity.Comment;

 

public interface CommentMapper {

    @Insert("insert into comment values(default, #{param1},#{param2},#{param3},default)")

    int insert(int essayId, int visitorId, String content);

}