springclouddemo5.2 service provider -user

** Learn from the station b springcloud project, now summarize the summary removal of a small error appearing in the video, some of the error-prone places were reminded

b outbound links: https://www.bilibili.com/video/av55629580?p=1
profile link:
https://pan.baidu.com/s/1o0Aju3IydKA15Vo1pP4z5w
extraction code: 21ru

On a link:
https://blog.csdn.net/qq_40893824/article/details/103615379
next section link:
https://blog.csdn.net/qq_40893824/article/details/103626809

The following list summarizes:
Client / Entity / the User → Client / Feign New UserFeign.java → client / controller checks the New UserHandler.java →

Now calling user to the client function
implementation details:
1. User / entity class User entity to copy client / entity are
2. In client / feign the New Interface UserFeign.java, tagging:

package com.southwind.feign;

import com.southwind.entity.User;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@FeignClient(value = "user")
public interface UserFeign {

    /*增*/
    @PostMapping("/user/save")
    public void save(@RequestBody User user);

    /*改*/
    @PutMapping("/user/update")
    public void update(@RequestBody User user);

    /*删*/
    @DeleteMapping("/user/deleteById/{id}")
    public void deleteById(@PathVariable("id")long id);

    /*查*/
    @GetMapping("/user/findAll/{index}/{limit}")
    public List<User> findAll(@PathVariable("index")int index , @PathVariable("limit")int limit);

    @GetMapping("/user/findById/{id}")
    public User findById(@PathVariable("id")long id);

    @GetMapping("/user/count")
    public int count();
}

3. In the client / controller to control the new class UserHandler.java, tagging:
Note save @RequestBody no need to add the User, the Client does not need @RequestBody, only handle this function is achieved only need to parse data @RequestBody, just call the client does not need to parse data @RequestBody!
user / UserHandler in will add @RequestBody

package com.southwind.controller;

import com.southwind.entity.User;
import com.southwind.feign.UserFeign;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping("/user")
public class UserHandler {

    @Autowired
    private UserFeign userFeign;

    /*增*/
    @PostMapping("/save")
    public void save( User user){
        userFeign.save(user);
    }

    @PutMapping("/update")
    public void update(@RequestBody User user){
        userFeign.update(user);
    }
    /*删*/
    @DeleteMapping("/deleteById/{id}")
    public void deleteById(@PathVariable("id")long id){
        userFeign.deleteById(id);
    }

    /*查*/
    @GetMapping("/findAll/{index}/{limit}")
    public List<User> findAll(@PathVariable("index") int index , @PathVariable("limit") int limit){
        return userFeign.findAll(index, limit);
    }

    @GetMapping("/findById/{id}")
    public User findById(@PathVariable("id")long id){
        return userFeign.findById(id);
    }

    @GetMapping("/count")
    public int count(){
        return userFeign.count();
    }
}

4. Enter the HTTP: // localhost: 8030 / the User / findAll / 0/10

findAll successful call!
5. Open Postman
A into the HTTP GET:. // localhost: 8030 / the User / findAll / 0/10

findAll success!
b into the post http:. // localhost: 8030 / user / save

successfully added!
c enters put http:. // localhost: 8030 / user / update

re-entering the get http: // localhost: 8030 / user / findAll / 0/10

updated successfully!
d enter delete http:. // localhost: 8030 / user / deleteById / 7
re-entering the get http: // localhost: 8030 / user / findAll / 0/10

success!

On a link:
https://blog.csdn.net/qq_40893824/article/details/103615379
next section link:
https://blog.csdn.net/qq_40893824/article/details/103626809