init

index.js

@@ -0,0 +1,80 @@
+const express = require('express')
+const sqlite3 = require("sqlite3").verbose()
+const app = express()
+
+const db = new sqlite3.Database("db/student.db")
+
+app.get('/', function (req, res) { //根路由返回index.html前端文件
+    res.setHeader('Content-Type', 'text/html')
+    res.sendFile(`${__dirname}/static/index.html`)
+})
+app.get('/select', (req, response) => { //查询
+    const saddr = req.query.saddr ?? ""
+    console.log(saddr)
+    if (saddr) {
+        db.all(`select * from S where SADDR = '${saddr}';`, (e, res) => {
+            console.log(res)
+            response.json(res)
+        })
+    } else {
+        db.all(`select * from S;`, (e, res) => {
+            console.log(res)
+            response.json(res)
+        })
+    }
+})
+
+app.get('/update', (req, res) => { //修改
+    const sno = req.query.sno
+    const sname = req.query.sname
+    const ssex = req.query.ssex
+    const sage = req.query.sage
+    const saddr = req.query.saddr
+    if (sno) {
+        db.run(`update S set SNAME = '${sname}', SSEX = '${ssex}', SAGE = ${sage}, SADDR = '${saddr}' where SNO = ${sno};`, (e) => {
+            if (!e) {
+                res.json({success: "更新成功"})
+            } else {
+                res.json({err: e.toString()})
+            }
+        })
+    } else {
+        res.json({err: "sno is required"})
+    }
+})
+
+app.get('/insert', (req, res) => { //插入
+    const sno = req.query.sno
+    const sname = req.query.sname
+    const ssex = req.query.ssex
+    const sage = req.query.sage
+    const saddr = req.query.saddr
+    if (sno) {
+        db.run(`insert into S values(${sno}, '${sname}', '${ssex}', ${sage}, '${saddr}')`, (e) => {
+            if (!e) {
+                res.json({success: "插入成功"})
+            } else {
+                res.json({err: e.toString()})
+            }
+        })
+    } else {
+        res.json({err: "sno is required"})
+    }
+})
+
+app.get('/delete', (req, res) => { //删除
+    const sno = req.query.sno
+    if (sno) {
+        db.run(`delete from S where SNO = ${sno}`, (e) => {
+            if (!e) {
+                res.json({success: "删除成功"})
+            } else {
+                res.json({err: e.toString()})
+            }
+        })
+    } else {
+        res.json({err: "sno is required"})
+    }
+})
+app.listen(3000)
+console.log("程序运行在 http://127.0.0.1:3000")