spring boot——spring boot的基本配置——spring boot整合mybatis——本地实例运行——更新操作——int类型——根据id修改数据&根据name修改数据...

以你之姓@ 2023-09-28 23:54 12阅读 0赞

pojo类：

package org.example.entity;
    
    public class MyUser
    {
        private int id;
        private String name;
        private int age;
    
    
        public int getId() {
            return id;
        }
    
        public void setId(int id) {
            this.id = id;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public int getAge() {
            return age;
        }
    
        public void setAge(int age) {
            this.age = age;
        }
    
        @Override
        public String toString() {
            return "MyUser{" +
                    "id=" + id +
                    ", name='" + name + '\'' +
                    ", age=" + age +
                    '}';
        }
    }

![49bc609f24b2f03a9f4983f461d08fd8.png][]

mapper文件：

<?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="org.example.mapper.UserMapper">
        <select id="findAll" resultType="org.example.entity.MyUser">
            select * from users
        </select>
    
        <insert id="saveUser" parameterType="org.example.entity.MyUser">
            insert into users(id,name,age) values(#{id},#{name},#{age})
        </insert>
    
        <insert id="saveUser2" parameterType="org.example.entity.MyUser">
            insert into users(id,name,age) values(#{id},#{name},#{age})
        </insert>
    
        <insert id="saveInsertUser" parameterType="org.example.entity.MyUser">
            <selectKey keyProperty="id" keyColumn="id" order="AFTER" resultType="int">
                SELECT LAST_INSERT_ID();
            </selectKey>
            insert into users(id,name,age) values(#{id},#{name},#{age})
        </insert>
    
        <update id="updateUser" parameterType="org.example.entity.MyUser">
            update users set name = #{name},age = #{age} where id = #{id}
        </update>
    
    </mapper>

![4e09d8a2d3894d07eeae7a8d5554562d.png][]

mapper接口：

package org.example.mapper;
    
    import org.example.entity.MyUser;
    import org.apache.ibatis.annotations.Mapper;
    
    import java.util.List;
    
    @Mapper
    public interface UserMapper
    {
    
        public List<MyUser> findAll();
    
        void saveUser(MyUser user);
    
        int saveUser2(MyUser user);
    
        int saveInsertUser(MyUser user);
    
        int updateUser(MyUser user);
    
    }

service接口：

package org.example.service;
    
    
    import org.example.entity.MyUser;
    
    import java.util.List;
    
    public interface UserService
    {
        List<MyUser> findAll();
    
        void saveUser(MyUser user);
    
        int saveUser2(MyUser user);
    
        int saveInsertUser(MyUser user);
    
        int updateUser(MyUser user);
    
    }

实现service接口：

package org.example.service.Impl;
    
    
    import org.example.entity.MyUser;
    import org.example.mapper.UserMapper;
    import org.example.service.UserService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    
    import java.util.List;
    
    @Service
    public class UserServiceImpl implements UserService
    {
        @Autowired
        UserMapper userMapper;
    
        @Override
        public List<MyUser> findAll()
        {
            return userMapper.findAll();
        }
    
        @Override
        public void saveUser(MyUser user)
        {
            userMapper.saveUser(user);
        }
    
        public int saveUser2(MyUser user)
        {
            return userMapper.saveUser2(user);
        }
    
        public int saveInsertUser(MyUser user)
        {
    
            return userMapper.saveInsertUser(user);
        }
    
        public int updateUser(MyUser user)
        {
            return userMapper.updateUser(user);
        }
    }

![62030b24274dcf3a955554d580956cc4.png][]

控制器：

package org.example.controller;
    
    import java.util.List;
    import org.example.entity.MyUser;
    import org.example.service.UserService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    public class MyUserController
    {
        @Autowired
        private UserService userService;
    
        @GetMapping(value = "/1")
        public List<MyUser> home1()
        {
            // 查询所有网站
            List<MyUser> users = userService.findAll();
    
            for (MyUser user : users)
            {
                System.out.println(user.getId()+"  "+user.getName()+"  "+user.getAge());
            }
    
            return users;
        }
    
        @GetMapping(value = "/2")
        public void home2()
        {
            MyUser user2 = new MyUser();
            user2.setName("TTT");
            user2.setAge(7878);
    
            userService.saveUser(user2);
    
        }
    
        @GetMapping(value = "/3")
        public int home3()
        {
            MyUser user2 = new MyUser();
            user2.setName("RRR");
            user2.setAge(6666);
    
            int a = userService.saveUser2(user2);
    
            System.out.println(a);
    
            return a;
    
        }
    
        @GetMapping(value = "/4")
        public int home4()
        {
            MyUser user2 = new MyUser();
            user2.setName("ccc");
            user2.setAge(321123);
    
            userService.saveInsertUser(user2);
    
            int a = user2.getId();
    
            System.out.println(a);
    
            System.out.println(user2);
    
            return a;
    
        }
    
        @GetMapping(value = "/5")
        public int updateUser()
        {
            MyUser user2 = new MyUser();
            user2.setId(1013);
            user2.setName("sprint-boot-1013");
            user2.setAge(5858585);
    
            int a = userService.updateUser(user2);
    
            System.out.println(a);
    
            return a;
    
        }
    
    }

![44947aa579dddfc12c3fb4d8020690cb.png][]

修改前数据：

![f0cf33803cc0297368c9f99e952bfcb3.png][]

运行操作：

![0f7eb3443235534f59461ea7956316a9.png][]

![7fa8e21d382a7e4955ec55340ee101be.png][]

![860eb831a3de3bc0f210c3fe0c1d2d99.png][]

===========================================================================

其他不变：

修改如下：

![99fe7c90c0dafaf4f2f4688243ac409f.png][]

![c9a7c9f8f57e0f4d9d24072880b59e1d.png][]

![852c1522176609a5eb92eabfc64acc48.png][]

[49bc609f24b2f03a9f4983f461d08fd8.png]: https://img-blog.csdnimg.cn/img_convert/49bc609f24b2f03a9f4983f461d08fd8.png
[4e09d8a2d3894d07eeae7a8d5554562d.png]: https://img-blog.csdnimg.cn/img_convert/4e09d8a2d3894d07eeae7a8d5554562d.png
[62030b24274dcf3a955554d580956cc4.png]: https://img-blog.csdnimg.cn/img_convert/62030b24274dcf3a955554d580956cc4.png
[44947aa579dddfc12c3fb4d8020690cb.png]: https://img-blog.csdnimg.cn/img_convert/44947aa579dddfc12c3fb4d8020690cb.png
[f0cf33803cc0297368c9f99e952bfcb3.png]: https://img-blog.csdnimg.cn/img_convert/f0cf33803cc0297368c9f99e952bfcb3.png
[0f7eb3443235534f59461ea7956316a9.png]: https://img-blog.csdnimg.cn/img_convert/0f7eb3443235534f59461ea7956316a9.png
[7fa8e21d382a7e4955ec55340ee101be.png]: https://img-blog.csdnimg.cn/img_convert/7fa8e21d382a7e4955ec55340ee101be.png
[860eb831a3de3bc0f210c3fe0c1d2d99.png]: https://img-blog.csdnimg.cn/img_convert/860eb831a3de3bc0f210c3fe0c1d2d99.png
[99fe7c90c0dafaf4f2f4688243ac409f.png]: https://img-blog.csdnimg.cn/img_convert/99fe7c90c0dafaf4f2f4688243ac409f.png
[c9a7c9f8f57e0f4d9d24072880b59e1d.png]: https://img-blog.csdnimg.cn/img_convert/c9a7c9f8f57e0f4d9d24072880b59e1d.png
[852c1522176609a5eb92eabfc64acc48.png]: https://img-blog.csdnimg.cn/img_convert/852c1522176609a5eb92eabfc64acc48.png

spring boot——spring boot的基本配置——spring boot整合mybatis——本地实例运行——更新操作——int类型——根据id修改数据&根据name修改数据...

发表评论取消回复

还没有评论，来说两句吧...

相关阅读

相关 spring boot——spring boot的基本配置——spring boot整合mybatis——本地实例运行——查询操作——返回int类型——查询总行数...

相关 spring boot——spring boot的基本配置——spring boot整合mybatis——本地实例运行——查询操作——返回list列表-pojo类型——根据name查询数据...

相关 spring boot——spring boot的基本配置——spring boot整合mybatis——本地实例运行——查询操作——返回pojo类型——根据id查询数据...

相关 spring boot——spring boot的基本配置——spring boot整合mybatis——本地实例运行——删除操作——int类型——根据name删除数据...

相关 spring boot——spring boot的基本配置——spring boot整合mybatis——本地实例运行——MyBatis动态SQL——MyBatis分页...

相关 spring boot——spring boot的基本配置——spring boot整合mybatis——本地实例运行——MyBatis动态SQL——MyBatis set标签...

相关 spring boot——spring boot的基本配置——spring boot整合mybatis——本地实例运行——更新操作——int类型——根据id修改数据&根据name修改数据...

相关 spring boot——spring boot的基本配置——spring boot整合mybatis——本地实例运行——保存操作——int类型...

相关 spring boot——spring boot的基本配置——spring boot整合mybatis——本地实例运行——保存操作——int类型——获取返回自增id...

相关 spring boot——spring boot的基本配置——spring boot整合mybatis——本地实例运行