Mybatis_修改和删除

修改.

    <update id="update" parameterType = "xxx.x.Person">
        update person t set 
        t.name = #{name},
        t.gender = #{gender},
        t.person_addr = #{personAddr},
        t.birthday = #{birthday}
        where t.person_id = #{personId}
    </update>

public void update() {
        //创建SqlSession
        SqlSession session = sessionFactory.openSession();
        try {
            Person p = new Person();
            p.setId(2);
            p.setName("李四");
            p.setGender(1);
            p.setAddress("上海");
            p.setBirthday(new Date());
            int count = session.update("xxx.x.mapper.PersonTestMapper.update",p); //此处有一个返回值，是影响的行数
            session.commit(); //数据库的变更（增删改）都要提交事务
            System.out.println(count);
        }catch (Exception e) {
            e.printStackTrace();
            session.rollback();
        }finally {
            session.close();
        }
        
    }

 删除：

    <delete id = "delete" parameterType = "java.lang.Integer">
        delete from person where person_id = #{id}
    </delete>

    public void delete() {
        //创建SqlSession
        SqlSession session = sessionFactory.openSession();
        try {
            
            int count = session.delete("xxx.x.mapper.PersonTestMapper.delete",3); //删id为3 的那行
            session.commit(); //数据库的变更（增删改）都要提交事务
            System.out.println(count);
        }catch (Exception e) {
            e.printStackTrace();
            session.rollback();
        }finally {
            session.close();
        }
        
    }