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<Book> 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

<template>
    <el-form style="width: 60%" :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm">

        <el-form-item label="图书编号" prop="id">
            <el-input v-model="ruleForm.id"></el-input>
        </el-form-item>

        <el-form-item label="图书名称" prop="name">
            <el-input v-model="ruleForm.name"></el-input>
        </el-form-item>

        <el-form-item label="作者" prop="author">
            <el-input v-model="ruleForm.author"></el-input>
        </el-form-item>

        <el-form-item>
            <el-button type="primary" @click="submitForm('ruleForm')">修改</el-button>
            <el-button @click="resetForm('ruleForm')">重置</el-button>
        </el-form-item>

    </el-form>
</template>

<script>
import axios from 'axios'
    export default {
        data() {
            return {
                ruleForm: {
                    id: '',
                    name: '',
                    author: ''
                },
                rules: {
                    name: [
                        { required: true, message: '图书名称不能为空', trigger: 'blur' }
                    ],
                    author:[
                        { required: true, message: '作者不能为空', trigger: 'blur' }
                    ]
                }
            };
        },
        methods: {
            submitForm(formName) {
                const _this = this
                this.$refs[formName].validate((valid) => {
                    if (valid) {
                        axios.put('http://localhost:8011/book/update',this.ruleForm).then(function(resp){
                            if(resp.data == 'success'){
                                _this.$alert('《'+_this.ruleForm.name+'》修改成功！', '消息', {
                                    confirmButtonText: '确定',
                                    callback: action => {
                                        _this.$router.push('/home/users')
                                    }
                                })
                            }
                        })
                    } else {
                        return false;
                    }
                });
            },
            resetForm(formName) {
                this.$refs[formName].resetFields();
            }
        },

    }
</script>

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,