Mybatis使用注解开发CRUD
jopen
10年前
使用XML来操作Mybatis实现CRUD,但是大量的XML配置文件的编写是非常烦人的。因此
Mybatis也提供了基于注解的配置方式,下面我们来演示一下使用接口加注解来实现CRUD的的例子。
首先是创建一个接口。
package com.bird.mybatis.bean; 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 UserMapper { @Insert("insert into users(name, age) values(#{name}, #{age})") public int add(Users user); @Delete("delete from users where id = #{id}") public int deleteById(int id); @Update("update users set name = #{name}, age = #{age} where id = #{id}") public int update(Users user); @Select("select * from users where id = #{id}") public Users getUserById(int id); @Select("select * from users") public List<Users> getAllUsers(); }
然后一定不要忘了在conf.xml配置文件中,注册这个类
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下面就是使用这个类了 </div> </div> 来自:http://blog.csdn.net/a352193394/article/details/39940259
<mappers> <mapper resource="com/bird/mybatis/bean/userMapper.xml" /> <mapper class="com.bird.mybatis.bean.UserMapper"/> </mappers>
下面就是使用这个类了
@Test public void testAdd2() { SqlSession openSession = factory.openSession(); UserMapper mapper = openSession.getMapper(UserMapper.class); mapper.add(new Users(-1,"娃娃",99)); openSession.commit(); openSession.close(); }