在ruoyi系统添加CURD 功能

目录

1.在若依数据库中添加测试表

2.在若依系统添加实例代码

3.具体代码

3.1User

3.2UserMapper接口

3.3UserService

3.4UserServiceimpl

3.5UserMapper.xml

4.开放接口​编辑

5.连接数据库

6.测试接口

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1.在若依数据库中添加测试表

2.在若依系统添加实例代码

在ruoyi-system\src\main\java\com\ruoyi\system添加实例代码

在包domain下添加User类

在包mapper中添加UserMapper接口

在service下添加UserService接口

在包impl中添加UserServiceimpl类

、

在ruoyi-system\src\main\resources\mapper\system这个路径下添加UserMapper.xml

ruoyi-system\src\main\java\com\ruoyi\system在此路径下添加HelloController

3.具体代码

3.1User

package com.ruoyi.system.domain;

public class User {
    public int id;
    private String name;
    private int age;
    public int sex;
    public String createTime;

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public int getSex() {
        return sex;
    }

    public void setSex(int sex) {
        this.sex = sex;
    }

    public String getCreateTime() {
        return createTime;
    }

    public void setCreateTime(String createTime) {
        this.createTime = createTime;
    }
}

3.2UserMapper接口

package com.ruoyi.system.mapper;

import com.ruoyi.system.domain.User;

import java.util.List;

public interface UserMapper {
    public List<User> selectAllUser();
}

3.3UserService

package com.ruoyi.system.service;

public interface UserService {
}

3.4UserServiceimpl

package com.ruoyi.system.service.impl;


import com.ruoyi.system.domain.User;
import com.ruoyi.system.mapper.UserMapper;
import com.ruoyi.system.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
    private UserMapper userMapper;

    public List<User> selectAllUser()
    {
        return userMapper.selectAllUser();
    }
}

3.5UserMapper.xml

<?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="com.ruoyi.system.mapper.UserMapper">
    <resultMap id="UserResult" type="User">
        <id     property="id"   column="id"     />
        <result property="name" column="name"   />
        <result property="age"  column="age"   />
        <result property="sex"  column="sex"   />
        <result property="createTime"  column="create_time"   />
    </resultMap>

    <select id="selectAllUser" resultMap="UserResult">
        select * from myuser
    </select>

</mapper>

3.6HelloController

package com.ruoyi.web.controller.system;



import com.ruoyi.system.domain.User;
import com.ruoyi.system.service.impl.UserServiceimpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
public class HelloController {
    @Autowired
    private UserServiceimpl userServiceimpl;

    @GetMapping("/hello")
    public List<User> hello()
    {
        return userServiceimpl.selectAllUser();
    }
}

4.开放接口

添加102行代码

5.连接数据库

输入自己的用户名及密码,后点击确认

6.测试接口

启动redis 并启动ruoyi后端

获得对象,则表示成功