前后端分离项目(九):实现"添加"功能(后端接口)

好家伙,来了来了，”查“已经完成了，现在是“增”

 

前端的视图已经做好了，现在我们来完善后端

后端目录结构

 

 

完整代码在前后端分离项目(五):数据分页查询（后端接口） - 养肥胖虎 - 博客园 (cnblogs.com)中

 

我们来看我们的接口代码:

package com.example.demo2.controller;

import com.example.demo2.entity.Book;
import com.example.demo2.repository.BookRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.web.bind.annotation.*;

@RestController
@RequestMapping("/book")
public class BookHandler {
    @Autowired
    private BookRepository bookRepository;

    @GetMapping("/findAll/{page}/{size}")
    public Page findAll(@PathVariable("page") Integer page, @PathVariable("size") Integer size){
        PageRequest request = PageRequest.of(page-1,size);
        return bookRepository.findAll(request);
    }

    @PostMapping("/save")
    public String save(@RequestBody Book book){
        Book result = bookRepository.save(book);
        if(result != null){
            return "success";
        }else{
            return "error";
        }
    }

    @GetMapping("/findById/{id}")
    public Book findById(@PathVariable("id") Integer id){
        return bookRepository.findById(id).get();
    }

    @PutMapping("/update")
    public String update(@RequestBody Book book){
        Book result = bookRepository.save(book);
        if(result != null){
            return "success";
        }else{
            return "error";
        }
    }

    @DeleteMapping("/deleteById/{id}")
    public void deleteById(@PathVariable("id") Integer id){
        bookRepository.deleteById(id);
    }
}

 

    @PostMapping("/save")
    public String save(@RequestBody Book book){
        Book result = bookRepository.save(book);
        if(result != null){
            return "success";
        }else{
            return "error";
        }
    }

前端的接口调用记得改

 

我们的数据库表:

 

 来了,让我们看看效果吧

 

 

成了,卧槽,终于tmd成了,