前面说了基于 PersonMappe.xml 配置文件的操作, 现在咱们说一下基于注解的配置如何操作.
一般我们不用基于注解的配置.
大体了解一下吧,
首先, 要想使用基于注解的配置, 首先得把之前建立的 PersonMapper.xml 文件删掉, 然后在 cong.xml 文件中接触注册.
一: 定义 SQL 映射的接口
package com.mybatis.entities;
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;
public interface PersonMapper {
@Insert("INSERT INTO person(name, age) VALUES(#{name}, #{age})")
public int insertPerson(Person Person);
@Delete("DELETE FROM person WHERE id=#{id}")
public int deletePersonById(int id);
@Update("UPDATE person SET name=#{name},age=#{age} WHERE id=#{id}")
public int updatePerson(Person Person);
@Select("SELECT id, name, age FROM person WHERE id=#{id}")
public Person getPersonById(int id);
@Select("SELECT id, name, age FROM Person")
public List<Person> getAllPerson();
}二: 在conf.xml中注册
<mappers> <mapper class="com.mybatis.entities.PersonMapper"/> </mappers>
三: 调用
package com.mybatis.test;
import org.apache.ibatis.session.SqlSession;
import org.junit.Test;
import com.mybatis.entities.Person;
import com.mybatis.entities.PersonMapper;
import com.mybatis.util.MyBatisUtil;
public class TestPersonAnnotation {
@Test
public void testGetPersonById(){
SqlSession session = MyBatisUtil.getSqlSession();
PersonMapper mapper = session.getMapper(PersonMapper.class);
Person person = mapper.getPersonById(2);
System.out.println(person);
}
} 就这么点东西.
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原文:http://wuqinglong.blog.51cto.com/9087037/1723196