node实现简单的增删改查接口实例代码

• Z时代
• 2024-01-10
• 分类：综合

node实现简单的增删改查接口的全部代码如下：

// 数据存储在users.json文件中
const express = require("express");
const fs = require("fs");
const cors = require("cors");
const bodyParser = require("body-parser");
const app = express();
app.use(cors({ origin: "*" })); // fix 跨域
app.use(bodyParser.json()); // for parsing application/json
app.use(bodyParser.urlencoded({ extended: true })); // for parsing application/x-www-form-urlencoded
// 新增
app.post("/addUser", (req, res) => {
 fs.readFile("./users.json", "utf8", (err, data) => {
  if (err) {
   throw err;
  }
  data = data ? JSON.parse(data) : [];
  data.push(req.body);
  fs.writeFile("./users.json", JSON.stringify(data), err => {
   if (err) throw err;
   res.end();
  });
 });
});
// 删除
app.delete("/delUser/:id", (req, res) => {
 const id = req.params.id;
 fs.readFile("./users.json", "utf8", (err, data) => {
  data = JSON.parse(data) || [];
  const saveData = data.filter(item => item.id != id);
  fs.writeFile("./users.json", JSON.stringify(saveData), err => {
   if (err) throw err;
   res.end();
  });
 });
});
// 修改
app.put("/update/:id", (req, res) => {
 const id = req.params.id;
 const body = req.body;
 fs.readFile(__dirname + "/" + "users.json", "utf8", (err, data) => {
  const userList = (data && JSON.parse(data)) || [];
  const index = userList.findIndex(item => item.id == id);
  userList[index] = { ...userList[index], ...body };
  fs.writeFile("./users.json", JSON.stringify(userList), err => {
   if (err) throw err;
console.log("修改");
   res.end();
  });
 });
});
// 列表查询
app.get("/listUsers", function(req, res) {
  fs.readFile(__dirname + "/" + "users.json", "utf8", function(err, data) {
   console.log(data);
   res.end(data);
  });
});
app.listen(8081, function() {
 console.log("访问地址: http://localhost:8081");
});

以上是 node实现简单的增删改查接口实例代码 的全部内容， 来源链接： utcz.com/z/328386.html