From e8ac4991ff5c1ef6cb727e2465ad008b574b35d8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E5=A6=99=E5=A8=9F?= <2949988397@qq.com>
Date: Mon, 13 Feb 2023 16:56:05 +0800
Subject: [PATCH 1/3] cmj

---
 .../\351\231\210\345\246\231\345\250\237.txt"                     | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 create mode 100644 "\351\231\210\345\246\231\345\250\237/\351\231\210\345\246\231\345\250\237.txt"

diff --git "a/\351\231\210\345\246\231\345\250\237/\351\231\210\345\246\231\345\250\237.txt" "b/\351\231\210\345\246\231\345\250\237/\351\231\210\345\246\231\345\250\237.txt"
new file mode 100644
index 0000000..e69de29
-- 
Gitee


From d991975ab48b57749aeb70d11a7022c75a1a59ac Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E5=A6=99=E5=A8=9F?= <2949988397@qq.com>
Date: Tue, 28 Mar 2023 07:36:09 +0000
Subject: [PATCH 2/3] 33
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: 陈妙娟 <2949988397@qq.com>
---
 .../.vscode/launch.json"                      | 15 +++
 .../module.js"                                | 23 +++++
 .../\344\275\234\344\270\232.js"              |  9 ++
 .../file.js"                                  | 51 ++++++++++
 .../file.js"                                  | 49 ++++++++++
 .../file.js"                                  | 50 ++++++++++
 .../db.js"                                    | 47 ++++++++++
 .../db.js"                                    | 50 ++++++++++
 .../file.js"                                  | 25 +++++
 .../config.js"                                |  8 ++
 .../db.js"                                    | 94 +++++++++++++++++++
 .../HTML/class.html"                          | 84 +++++++++++++++++
 .../zuoye.js"                                 | 26 +++++
 .../HTML/class.html"                          | 84 +++++++++++++++++
 .../zuoye.js"                                 | 33 +++++++
 .../app.js"                                   |  0
 16 files changed, 648 insertions(+)
 create mode 100644 "\351\231\210\345\246\231\345\250\237/20230215-\346\250\241\345\235\227\347\232\204\344\275\277\347\224\250/.vscode/launch.json"
 create mode 100644 "\351\231\210\345\246\231\345\250\237/20230215-\346\250\241\345\235\227\347\232\204\344\275\277\347\224\250/module.js"
 create mode 100644 "\351\231\210\345\246\231\345\250\237/20230215-\346\250\241\345\235\227\347\232\204\344\275\277\347\224\250/\344\275\234\344\270\232.js"
 create mode 100644 "\351\231\210\345\246\231\345\250\237/20230216-\346\226\207\344\273\266\347\232\204\345\206\231\345\205\245\344\273\245\345\217\212\350\257\273\345\217\226/file.js"
 create mode 100644 "\351\231\210\345\246\231\345\250\237/20230218-\345\274\202\345\220\214\346\255\245\346\226\207\344\273\266\345\206\231\345\205\245/file.js"
 create mode 100644 "\351\231\210\345\246\231\345\250\237/20230220-\345\206\231\345\205\245\346\226\207\344\273\266\346\265\201/file.js"
 create mode 100644 "\351\231\210\345\246\231\345\250\237/20230222-\346\225\260\346\215\256\345\272\223\346\250\241\345\235\227\345\242\236\345\210\240\346\224\271\346\237\245/db.js"
 create mode 100644 "\351\231\210\345\246\231\345\250\237/20230223-node\346\225\260\346\215\256\345\272\223/db.js"
 create mode 100644 "\351\231\210\345\246\231\345\250\237/20230225-\346\234\237\347\272\246\345\274\202\346\255\245\345\207\275\346\225\260/file.js"
 create mode 100644 "\351\231\210\345\246\231\345\250\237/20230227-\346\225\260\346\215\256\345\272\223\345\210\206\351\241\265\346\237\245\350\257\242/config.js"
 create mode 100644 "\351\231\210\345\246\231\345\250\237/20230227-\346\225\260\346\215\256\345\272\223\345\210\206\351\241\265\346\237\245\350\257\242/db.js"
 create mode 100644 "\351\231\210\345\246\231\345\250\237/20230302-express\346\241\206\346\236\266/HTML/class.html"
 create mode 100644 "\351\231\210\345\246\231\345\250\237/20230302-express\346\241\206\346\236\266/zuoye.js"
 create mode 100644 "\351\231\210\345\246\231\345\250\237/20230304-express\344\270\255\351\227\264\344\273\266/HTML/class.html"
 create mode 100644 "\351\231\210\345\246\231\345\250\237/20230304-express\344\270\255\351\227\264\344\273\266/zuoye.js"
 create mode 100644 "\351\231\210\345\246\231\345\250\237/20230306-\351\241\271\347\233\256\344\275\234\344\270\232/app.js"

diff --git "a/\351\231\210\345\246\231\345\250\237/20230215-\346\250\241\345\235\227\347\232\204\344\275\277\347\224\250/.vscode/launch.json" "b/\351\231\210\345\246\231\345\250\237/20230215-\346\250\241\345\235\227\347\232\204\344\275\277\347\224\250/.vscode/launch.json"
new file mode 100644
index 0000000..7b7a860
--- /dev/null
+++ "b/\351\231\210\345\246\231\345\250\237/20230215-\346\250\241\345\235\227\347\232\204\344\275\277\347\224\250/.vscode/launch.json"
@@ -0,0 +1,15 @@
+{
+    // 使用 IntelliSense 了解相关属性。 
+    // 悬停以查看现有属性的描述。
+    // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "pwa-chrome",
+            "request": "launch",
+            "name": "Launch Chrome against localhost",
+            "url": "http://localhost:8080",
+            "webRoot": "${workspaceFolder}"
+        }
+    ]
+}
\ No newline at end of file
diff --git "a/\351\231\210\345\246\231\345\250\237/20230215-\346\250\241\345\235\227\347\232\204\344\275\277\347\224\250/module.js" "b/\351\231\210\345\246\231\345\250\237/20230215-\346\250\241\345\235\227\347\232\204\344\275\277\347\224\250/module.js"
new file mode 100644
index 0000000..9d9aed9
--- /dev/null
+++ "b/\351\231\210\345\246\231\345\250\237/20230215-\346\250\241\345\235\227\347\232\204\344\275\277\347\224\250/module.js"
@@ -0,0 +1,23 @@
+//作业：写个加减乘除的模块（尽量少写暴露,要考虑复用性），供外部使用. 作业每个分支要建一个目录（自己名字）
+class method  {
+    constructor(a,b){
+        this.a = a;
+        this.b = b;
+    }
+    add(){
+        return this.a + this.b;
+    }
+    subtract(){
+        return this.a - this.b;
+    }
+    multiply(){
+        return this.a * this.b;
+    }
+    divide(){
+        if(this.b==0){
+            return "除数不能为零";
+        }
+        return this.a / this.b;
+    }
+}
+module.exports = method;
\ No newline at end of file
diff --git "a/\351\231\210\345\246\231\345\250\237/20230215-\346\250\241\345\235\227\347\232\204\344\275\277\347\224\250/\344\275\234\344\270\232.js" "b/\351\231\210\345\246\231\345\250\237/20230215-\346\250\241\345\235\227\347\232\204\344\275\277\347\224\250/\344\275\234\344\270\232.js"
new file mode 100644
index 0000000..54a99b5
--- /dev/null
+++ "b/\351\231\210\345\246\231\345\250\237/20230215-\346\250\241\345\235\227\347\232\204\344\275\277\347\224\250/\344\275\234\344\270\232.js"
@@ -0,0 +1,9 @@
+//作业：写个加减乘除的模块（尽量少写暴露,要考虑复用性），供外部使用. 作业每个分支要建一个目录（自己名字）
+let obj = require("./module");
+
+var add = new obj(10,5);
+
+console.log('加法结果为:'+add.add());
+console.log('减法结果为:'+add.subtract());
+console.log('乘法结果为:'+add.multiply());
+console.log('除法结果为:'+add.divide());
\ No newline at end of file
diff --git "a/\351\231\210\345\246\231\345\250\237/20230216-\346\226\207\344\273\266\347\232\204\345\206\231\345\205\245\344\273\245\345\217\212\350\257\273\345\217\226/file.js" "b/\351\231\210\345\246\231\345\250\237/20230216-\346\226\207\344\273\266\347\232\204\345\206\231\345\205\245\344\273\245\345\217\212\350\257\273\345\217\226/file.js"
new file mode 100644
index 0000000..32f7227
--- /dev/null
+++ "b/\351\231\210\345\246\231\345\250\237/20230216-\346\226\207\344\273\266\347\232\204\345\206\231\345\205\245\344\273\245\345\217\212\350\257\273\345\217\226/file.js"
@@ -0,0 +1,51 @@
+//文件读取需要使用fs模块,fs node自带的
+let fs = require("fs");
+//异步读取文件
+// fs.readFile('./weekend.txt', (error, data) => {
+//     console.log(error);
+//     console.log(data);//data 是 Buffer 类型
+//     console.log(data.toString());//1
+// });
+// console.log("我在前面还是后面输出");//
+
+//同步读取文件
+// let data = fs.readFileSync("./sports.txt");
+// console.log(data.toString());
+// console.log("会不会先输出");
+
+//假设读取文件 100毫秒，一个函数执行5毫秒，异步方式执行这个代码，总的耗时是多少 100毫秒，同步方式 105毫秒
+
+//文件写入
+
+//同步文件写入,有这个Sync就是同步
+
+// 作业：生成100个文件，每个文件存入一个1到1000的随机数字，再取出最大值的那个文件,值也要取出来,再取出最小的那个.
+var arr=[];
+for(let i=1;i<=10;i++){
+    var a = Math.floor(Math.random()*1001);
+    fs.writeFileSync("./D"+i,""+a);
+    arr.push(a);
+    fs.readFile("./D"+i,(error,data)=>{
+        var num = data.toString();
+        console.log("该文件夹后缀为:"+i+",数值为："+num);
+    })
+}
+var max=arr[0];
+var maxhz=1;
+for(let ii=0;ii<arr.length;ii++){
+    if(arr[ii]>max){
+        max=arr[ii];
+        maxhz=ii+1;
+    }
+}
+
+var min=arr[0];
+var minhz=1;
+for(let iii=0;iii<arr.length;iii++){
+    if(arr[iii]<min){
+        min=arr[iii]
+        minhz=iii+1;
+    }
+}
+console.log("---最大值为:"+max+",该文件名为：D"+maxhz);
+console.log("---最小值为:"+min+",该文件名为：D"+minhz);
\ No newline at end of file
diff --git "a/\351\231\210\345\246\231\345\250\237/20230218-\345\274\202\345\220\214\346\255\245\346\226\207\344\273\266\345\206\231\345\205\245/file.js" "b/\351\231\210\345\246\231\345\250\237/20230218-\345\274\202\345\220\214\346\255\245\346\226\207\344\273\266\345\206\231\345\205\245/file.js"
new file mode 100644
index 0000000..6d1ee59
--- /dev/null
+++ "b/\351\231\210\345\246\231\345\250\237/20230218-\345\274\202\345\220\214\346\255\245\346\226\207\344\273\266\345\206\231\345\205\245/file.js"
@@ -0,0 +1,49 @@
+// 作业2:生成1000个文件，用同步异步分别计算生成文件的时间.
+let fs = require("fs");
+
+// 同步写入
+//方法一：
+var T1=new Date().getTime();
+for(let i=0;i<1000;i++){
+    var nowDate = new Date();
+    var fileName = "./files/"+i;
+    fs.writeFileSync(fileName,"写入文件的时间戳为:"+nowDate.getTime()+"ms,写入文件的时间为:"+nowDate.toLocaleString());
+}
+var T2=new Date().getTime();
+console.log("方法一同步创建1000个文件消耗的时间为："+(T2-T1)+"ms");
+
+// 方法二：同步写入异步读取（等待两秒后读取）
+for(let i=0;i<1000;i++){
+    var nowDate = new Date();
+    var fileName = "./files/"+i;
+    fs.writeFileSync(fileName,"写入文件的时间戳为:"+nowDate.getTime()+"ms,写入文件的时间为:"+nowDate.toLocaleString());
+}
+var startTime = null ;
+var endTime = null;
+fs.readFile("./files/0",(error,data)=>{
+    startTime = data.toString().substring(10,23);
+    console.log("同步文件写入的开始时间戳为:"+startTime);
+});
+fs.readFile("./files/999",(error,data)=>{
+    endTime = data.toString().substring(10,23);
+    console.log("同步文件写入的结束时间戳为:"+endTime);
+});
+setTimeout(() => {
+    console.log("方法二同步创建1000个文件消耗的的时间为:"+(endTime-startTime)+"ms")
+}, 2000);
+
+// 异步写入
+setTimeout(() => {
+    var t1=new Date().getTime();
+    var num =0;
+    for(let j=0;j<1000;j++){
+        var nowDate = new Date();
+        var fileName = "./files/D"+j;
+        fs.writeFile(fileName,"写入文件的时间戳为:"+nowDate.getTime()+"ms,写入文件的时间为:"+nowDate.toLocaleString(),(error,data)=>{});
+        num++;
+        if(num ==1000){
+            var t2=new Date().getTime();
+            console.log("异步创建1000个文件消耗的时间为："+(t2-t1)+"ms");
+        }
+    }
+}, 2500);
\ No newline at end of file
diff --git "a/\351\231\210\345\246\231\345\250\237/20230220-\345\206\231\345\205\245\346\226\207\344\273\266\346\265\201/file.js" "b/\351\231\210\345\246\231\345\250\237/20230220-\345\206\231\345\205\245\346\226\207\344\273\266\346\265\201/file.js"
new file mode 100644
index 0000000..583bdb7
--- /dev/null
+++ "b/\351\231\210\345\246\231\345\250\237/20230220-\345\206\231\345\205\245\346\226\207\344\273\266\346\265\201/file.js"
@@ -0,0 +1,50 @@
+//作业:使用open write close的形式去创建一个大文件,
+// 内容从指定的文本中随机取一些（每次取得长度内容可以不一样）,
+// 计算出这个大文件出现最多的字符(要使用流的形式).
+let fs = require("fs");     
+
+var str = "qwertyuiopasdfghjklzxcvbnm";
+
+let fd = fs.openSync("./zuoye.txt","a");
+for(let i = 0;i<1000;i++){
+    var str11 = suiJi(Math.ceil(Math.random()*str.length));//ceil向上取整
+    fs.writeFileSync(fd,str11);
+}
+fs.closeSync(fd);
+
+var rs = fs.createReadStream("./zuoye.txt",'utf-8');
+var max=0;
+var char="";
+var o={};
+rs.on('data',function(chunk){
+    for(var k=0;k<chunk.length;k++){
+        if(o[chunk[k]]){
+            o[chunk[k]]++;
+        }else{
+            o[chunk[k]]=1;
+        }
+    }
+
+    for (var key in o) {
+        if (o[key]>max){
+            max=o[key];
+            char=key;   
+        }
+    }
+    console.log("该大文件的内容为:"+chunk);
+})
+
+rs.on('end',function(){
+    console.log("该大文件出现最多的字符为："+char+",次数为:"+max+"次");
+})
+
+
+///随机获取n个字符
+function suiJi(n){
+    var str1 = "";
+    for(let j=0;j<n;j++){
+        var xiaBiao=Math.ceil(Math.random()*str.length);
+        str1=str1+str[xiaBiao];
+    }
+    return str1;
+};
\ No newline at end of file
diff --git "a/\351\231\210\345\246\231\345\250\237/20230222-\346\225\260\346\215\256\345\272\223\346\250\241\345\235\227\345\242\236\345\210\240\346\224\271\346\237\245/db.js" "b/\351\231\210\345\246\231\345\250\237/20230222-\346\225\260\346\215\256\345\272\223\346\250\241\345\235\227\345\242\236\345\210\240\346\224\271\346\237\245/db.js"
new file mode 100644
index 0000000..68a5de7
--- /dev/null
+++ "b/\351\231\210\345\246\231\345\250\237/20230222-\346\225\260\346\215\256\345\272\223\346\250\241\345\235\227\345\242\236\345\210\240\346\224\271\346\237\245/db.js"
@@ -0,0 +1,47 @@
+//作业：建一个用户表（有姓名,年龄,性别,创建时间,修改时间）,使用模块加mysql模块,实现对数据的增删改查
+//npm init  初始化模块
+//npm install mysql 安装sql模块
+
+let mysql = require("mysql");
+
+let connection = mysql.createConnection({host:"localhost",user:"root",password:"root",port:"3306",database:"d"});
+connection.connect();
+//创建数据库代码
+// create table user (
+// 	user_id int primary key auto_increment,
+// 	user_name varchar (255),
+// 	user_year int ,
+// 	user_sex varchar(50),
+// 	user_createTime datetime,
+// 	user_updateTime	datetime default null
+// );
+
+// 查询数据库所有数据
+let sql = "select * from user ";
+connection.query(sql,(err,data)=>{
+    console.log(data);
+    // connection.end();
+})
+
+//新增数据
+let insertsql = "insert into user(`user_id`,`user_name`,`user_year`,`user_sex`,`user_createTime`) values(null,'张三','18','女',now());";
+connection.query(insertsql,(err,data)=>{
+    console.log(data);
+})
+
+//修改数据
+let updatesql = "update user set `user_name`='小明',`user_updateTime`=now() where user_id=1;";
+connection.query(updatesql,(err,data)=>{
+    console.log(data);
+})
+
+//删除数据
+let deletesql = "delete from user where `user_id`=3;";
+connection.query(deletesql,(err,data)=>{
+    console.log(data);
+    
+})
+connection.query(sql,(err,data)=>{
+    console.log(data);
+})
+connection.end();
\ No newline at end of file
diff --git "a/\351\231\210\345\246\231\345\250\237/20230223-node\346\225\260\346\215\256\345\272\223/db.js" "b/\351\231\210\345\246\231\345\250\237/20230223-node\346\225\260\346\215\256\345\272\223/db.js"
new file mode 100644
index 0000000..42918bb
--- /dev/null
+++ "b/\351\231\210\345\246\231\345\250\237/20230223-node\346\225\260\346\215\256\345\272\223/db.js"
@@ -0,0 +1,50 @@
+//实现分页,能实现男女个数和总数的统计,能统计出（小于18） 和 18-45 和 45岁以上的人数（可以的话一条sql,分组,如果不能行就写多个sql统计）
+let mysql = require("mysql");
+let connection = mysql.createConnection({host:'localhost',user:'root',password:'root',port:'3306',database:'class7'});
+connection.connect();
+
+let name = "小明";
+let sex = "男";
+let year = "17";
+
+let name1 = "张三";
+let sex1 = "男";
+let year1 = "18";
+
+
+let name2 = "李四";
+let sex2 = "男";
+let year2 = "19";
+
+let name3 = "王五";
+let sex3 = "女";
+let year3 = "20";
+
+let name4 = "老六";
+let sex4 = "男";
+let year4 = "45";
+
+let name5 = "小七";
+let sex5 = "女";
+let year5 = "48";
+
+let insertsql = "insert into user(`user_name`,`user_sex`,`user_year`) values(?,?,?)";
+connection.query(insertsql,[name,sex,year],()=>{})
+connection.query(insertsql,[name1,sex1,year1],()=>{})
+connection.query(insertsql,[name2,sex2,year2],()=>{})
+connection.query(insertsql,[name3,sex3,year3],()=>{})
+connection.query(insertsql,[name4,sex4,year4],()=>{})
+connection.query(insertsql,[name5,sex5,year5],()=>{})
+
+//实现分页,能实现男女个数和总数的统计,能统计出（小于18） 和 18-45 和 45岁以上的人数（可以的话一条sql,分组,如果不能行就写多个sql统计）
+let selectsql = "select `user_sex` as `性别`,count(*) as `个数`,count(user_id) as `总人数` from user group by user_sex;"
+connection.query(selectsql,(err,data)=>{
+    console.log(data);
+});
+
+//统计出（小于18） 和 18-45 和 45岁以上的人数
+let selectsqlall = "select  type,count(*) as `个数` from (select if(user_age<18,'小于18岁',if(user_age between 18 and 45,'18岁到45岁之间','45岁以上')) as type  from user) as a group by type;"
+connection.query(selectsqlall,(err,data)=>{
+    console.log(data)
+})
+connection.end();
\ No newline at end of file
diff --git "a/\351\231\210\345\246\231\345\250\237/20230225-\346\234\237\347\272\246\345\274\202\346\255\245\345\207\275\346\225\260/file.js" "b/\351\231\210\345\246\231\345\250\237/20230225-\346\234\237\347\272\246\345\274\202\346\255\245\345\207\275\346\225\260/file.js"
new file mode 100644
index 0000000..9ce720e
--- /dev/null
+++ "b/\351\231\210\345\246\231\345\250\237/20230225-\346\234\237\347\272\246\345\274\202\346\255\245\345\207\275\346\225\260/file.js"
@@ -0,0 +1,25 @@
+//作业:第一个能不能使用promise的异步函数,封装下数据库的查询,二 把sequelize 配置完成,至少能查询一个表去看看sequelize的文档
+let mysql = require('mysql');
+let connection = mysql.createConnection({host:'localhost',user:'root',password:'root',port:3306,database:"class7"});
+connection.connect();
+
+function method(sql){
+    return new Promise((resolve,reject)=>{
+        connection.query(sql,(err,data)=>{
+            if(err!=null){
+                reject(err);
+            }else{
+                resolve(data);
+            }
+        })
+    })
+};
+
+async function d(sql){
+    let connect = await method(sql);
+    console.log(connect);
+}
+
+d("select * from user");
+
+connection.end();
\ No newline at end of file
diff --git "a/\351\231\210\345\246\231\345\250\237/20230227-\346\225\260\346\215\256\345\272\223\345\210\206\351\241\265\346\237\245\350\257\242/config.js" "b/\351\231\210\345\246\231\345\250\237/20230227-\346\225\260\346\215\256\345\272\223\345\210\206\351\241\265\346\237\245\350\257\242/config.js"
new file mode 100644
index 0000000..8d60033
--- /dev/null
+++ "b/\351\231\210\345\246\231\345\250\237/20230227-\346\225\260\346\215\256\345\272\223\345\210\206\351\241\265\346\237\245\350\257\242/config.js"
@@ -0,0 +1,8 @@
+let data = {
+    host:"localhost",
+    user:'root',
+    password:'root',
+    port:3306,
+    database:'class7'
+}
+module.exports = data;
\ No newline at end of file
diff --git "a/\351\231\210\345\246\231\345\250\237/20230227-\346\225\260\346\215\256\345\272\223\345\210\206\351\241\265\346\237\245\350\257\242/db.js" "b/\351\231\210\345\246\231\345\250\237/20230227-\346\225\260\346\215\256\345\272\223\345\210\206\351\241\265\346\237\245\350\257\242/db.js"
new file mode 100644
index 0000000..ed863a1
--- /dev/null
+++ "b/\351\231\210\345\246\231\345\250\237/20230227-\346\225\260\346\215\256\345\272\223\345\210\206\351\241\265\346\237\245\350\257\242/db.js"
@@ -0,0 +1,94 @@
+// 作业：创建一个学生表,里面有班级字段,里面最好有自己班上同学姓名,
+//       其它班级的姓名随机写,有个字段存储游戏的分值,先实现随机的数值写入,
+//       查询出各班级前三名的学生
+
+//引入配置文件
+let config = require('./config');
+
+let mysql = require('mysql2')
+//引入
+const {Sequelize, Model, DataTypes, json } =require('sequelize');
+
+//初始化对象
+const sequelize = new Sequelize(config.database,config.user,config.password,{
+    //申明下使用的数据库
+    dialect:'mysql',
+    host:config.host,
+    port:config.port,
+    loggin:true,//日志
+    timezon:"+08:00",//东八区
+    define:{
+        timestamps:true,
+        underscored:true,
+        deleteAt:false
+    }
+});
+
+//创建对象,构建模型
+class student extends Model{}
+student.init({
+    stuId:{
+        type:DataTypes.INTEGER,
+        allowNull:false,
+        primaryKey:true,
+        autoIncrement:true,
+    },
+    stuName:{
+        type:DataTypes.STRING
+    },
+    stuClass:{
+        type:DataTypes.STRING
+    },
+    stuScore:{
+        type:DataTypes.STRING
+    }
+},{
+    sequelize,
+    modelName:"student",
+    tableName:"student",
+});
+
+async function useAsync(){
+    student.sync();
+    let stu =await student.findAll();
+    console.log("异步函数查询的结果:"+JSON.stringify(stu,null,4))
+}
+useAsync();
+
+setTimeout(function(){
+        let num1 = Math.floor(Math.random()*101);
+        let stu1 = new student({stuName:'陈妙娟',stuClass:7,stuScore:num1});
+        stu1.save();
+
+        let num2 = Math.floor(Math.random()*101);
+        let stu2 = new student({stuName:'王全业',stuClass:7,stuScore:num2});
+        stu2.save();
+
+        let num3 = Math.floor(Math.random()*101);
+        let stu3 = new student({stuName:'邓富钰',stuClass:7,stuScore:num3});
+        stu3.save();
+    }
+,3000)
+
+let connection = mysql.createConnection({host:'localhost',user:'root',password:'root',port:'3306',database:'class7'})
+connection.connect();
+
+let max7="select * from student  where stu_class=7  order by stu_sore  desc limit 3";
+connection.query(max7,(err,date)=>{
+    console.log(err);
+    console.log(date)
+})
+
+let max6="select * from student  where stu_class=6  order by stu_sore  desc limit 3";
+connection.query(max6,(err,date)=>{
+    console.log(err);
+    console.log(date)
+})
+
+let max5="select * from student  where stu_class=5  order by stu_sore  desc limit 3";
+connection.query(max5,(err,date)=>{
+    console.log(err);
+    console.log(date)
+})
+
+connection.end();
\ No newline at end of file
diff --git "a/\351\231\210\345\246\231\345\250\237/20230302-express\346\241\206\346\236\266/HTML/class.html" "b/\351\231\210\345\246\231\345\250\237/20230302-express\346\241\206\346\236\266/HTML/class.html"
new file mode 100644
index 0000000..1cae33f
--- /dev/null
+++ "b/\351\231\210\345\246\231\345\250\237/20230302-express\346\241\206\346\236\266/HTML/class.html"
@@ -0,0 +1,84 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>班级成绩排行</title>
+    <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
+</head>
+<style>
+    table {
+        width: 600px;
+        text-align: center;
+        border-collapse: collapse;
+    }
+</style>
+<body>
+    <h2>班级成绩</h2>
+    <table border="1" id="table"></table>
+    <button class="previous">上一页</button>
+    <span>/</span>
+    <button class="next">下一页</button>
+    <script>
+        $(document).ready(function () {
+            var table = document.getElementById('table');
+            var previous = document.getElementsByClassName('previous')[0];
+            var next = document.getElementsByClassName('next')[0];
+            var span = previous.nextElementSibling;
+            let page = 1;
+            let pagemin = 1;
+            let pagemax = 3;
+            let nowpage = 1;
+            param(page);
+            span.innerHTML = '当前页数为第' + nowpage + '页/总共' + pagemax + '页';
+
+            previous.addEventListener('click', function () {
+                page = page - 1;
+                if (page >= 1) {
+                    nowpage = page;
+                    param(page);
+                } else {
+                    page = pagemin;
+                    nowpage = page;
+                    param(page);
+                }
+            })
+
+            next.addEventListener('click', function () {
+                page = page + 1;
+                if (page < 4) {
+                    nowpage = page;
+                    param(page)
+                } else {
+                    page = pagemax;
+                    nowpage = page;
+                    param(page)
+                }
+            })
+
+            function param(page) {
+                $.ajax({
+                    url: '/class/api?page=' + page,
+                    method: 'get',
+                    dataType: 'JSON',
+                    success: (data) => {
+                        table.innerHTML = '';
+                        table.innerHTML = "<tr><th>ID</th><th>姓名</th><th>班级</th><th>成绩</th></tr>"
+                        for (const value of data) {
+                            table.innerHTML += "<tr><td>" + value.user_id +
+                                "</td><td>" + value.user_name +
+                                "</td><td>" + value.user_class +
+                                "</td><td>" + value.user_score +
+                                "</td></tr>"
+                        }
+                    }
+                })
+            }
+
+            $(document).on('click', function () {
+                span.innerHTML = '当前页数为第' + nowpage + '页/总共' + pagemax + '页';
+            })
+        });
+    </script>
+</html>
\ No newline at end of file
diff --git "a/\351\231\210\345\246\231\345\250\237/20230302-express\346\241\206\346\236\266/zuoye.js" "b/\351\231\210\345\246\231\345\250\237/20230302-express\346\241\206\346\236\266/zuoye.js"
new file mode 100644
index 0000000..5252b1a
--- /dev/null
+++ "b/\351\231\210\345\246\231\345\250\237/20230302-express\346\241\206\346\236\266/zuoye.js"
@@ -0,0 +1,26 @@
+// 利用express 想想怎么结合数据库,去实现学生（贪吃蛇的排名列表）,能把学生的分数，班级
+// 在班上排名显示出来,还能实现分页
+let express = require('express');
+let fs = require("fs");
+let mysql = require('mysql2')
+const app = express();
+
+app.get("/class",(request,response)=>{ 
+    fs.readFile('./html/class.html',(err,data)=>{
+        response.end(data)
+    });
+})
+
+app.get('/class/api',(request,response)=>{
+    response.writeHead(200, {'Content-Type': 'text/html;charset=utf-8'});
+    let connection = mysql.createConnection({host:'localhost',user:'root',password:'root',database:'class7'})
+    connection.connect();
+    let page = request.query.page ? request.query.page:1;
+    let sql = 'select * from user limit '+ (page-1)*3+',3';
+    connection.query(sql,(err,data)=>{
+        response.end(JSON.stringify(data))
+    })
+    connection.end();
+})
+
+app.listen(8080);
\ No newline at end of file
diff --git "a/\351\231\210\345\246\231\345\250\237/20230304-express\344\270\255\351\227\264\344\273\266/HTML/class.html" "b/\351\231\210\345\246\231\345\250\237/20230304-express\344\270\255\351\227\264\344\273\266/HTML/class.html"
new file mode 100644
index 0000000..1cae33f
--- /dev/null
+++ "b/\351\231\210\345\246\231\345\250\237/20230304-express\344\270\255\351\227\264\344\273\266/HTML/class.html"
@@ -0,0 +1,84 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>班级成绩排行</title>
+    <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
+</head>
+<style>
+    table {
+        width: 600px;
+        text-align: center;
+        border-collapse: collapse;
+    }
+</style>
+<body>
+    <h2>班级成绩</h2>
+    <table border="1" id="table"></table>
+    <button class="previous">上一页</button>
+    <span>/</span>
+    <button class="next">下一页</button>
+    <script>
+        $(document).ready(function () {
+            var table = document.getElementById('table');
+            var previous = document.getElementsByClassName('previous')[0];
+            var next = document.getElementsByClassName('next')[0];
+            var span = previous.nextElementSibling;
+            let page = 1;
+            let pagemin = 1;
+            let pagemax = 3;
+            let nowpage = 1;
+            param(page);
+            span.innerHTML = '当前页数为第' + nowpage + '页/总共' + pagemax + '页';
+
+            previous.addEventListener('click', function () {
+                page = page - 1;
+                if (page >= 1) {
+                    nowpage = page;
+                    param(page);
+                } else {
+                    page = pagemin;
+                    nowpage = page;
+                    param(page);
+                }
+            })
+
+            next.addEventListener('click', function () {
+                page = page + 1;
+                if (page < 4) {
+                    nowpage = page;
+                    param(page)
+                } else {
+                    page = pagemax;
+                    nowpage = page;
+                    param(page)
+                }
+            })
+
+            function param(page) {
+                $.ajax({
+                    url: '/class/api?page=' + page,
+                    method: 'get',
+                    dataType: 'JSON',
+                    success: (data) => {
+                        table.innerHTML = '';
+                        table.innerHTML = "<tr><th>ID</th><th>姓名</th><th>班级</th><th>成绩</th></tr>"
+                        for (const value of data) {
+                            table.innerHTML += "<tr><td>" + value.user_id +
+                                "</td><td>" + value.user_name +
+                                "</td><td>" + value.user_class +
+                                "</td><td>" + value.user_score +
+                                "</td></tr>"
+                        }
+                    }
+                })
+            }
+
+            $(document).on('click', function () {
+                span.innerHTML = '当前页数为第' + nowpage + '页/总共' + pagemax + '页';
+            })
+        });
+    </script>
+</html>
\ No newline at end of file
diff --git "a/\351\231\210\345\246\231\345\250\237/20230304-express\344\270\255\351\227\264\344\273\266/zuoye.js" "b/\351\231\210\345\246\231\345\250\237/20230304-express\344\270\255\351\227\264\344\273\266/zuoye.js"
new file mode 100644
index 0000000..8b2c60c
--- /dev/null
+++ "b/\351\231\210\345\246\231\345\250\237/20230304-express\344\270\255\351\227\264\344\273\266/zuoye.js"
@@ -0,0 +1,33 @@
+// 利用express 想想怎么结合数据库,去实现学生（贪吃蛇的排名列表）,能把学生的分数，班级
+// 在班上排名显示出来,还能实现分页
+let express = require('express');
+let fs = require("fs");
+let mysql = require('mysql2')
+const app = express();
+
+//中间件
+let globalmd = (req,res,next)=>{
+    console.log(req.url)
+    next();
+}
+app.use(globalmd);
+
+app.get("/class",(request,response)=>{ 
+    fs.readFile('./html/class.html',(err,data)=>{
+        response.end(data)
+    });
+})
+
+app.get('/class/api',(request,response)=>{
+    response.writeHead(200, {'Content-Type': 'text/html;charset=utf-8'});
+    let connection = mysql.createConnection({host:'localhost',user:'root',password:'root',database:'class7'})
+    connection.connect();
+    let page = request.query.page ? request.query.page:1;
+    let sql = 'select * from user limit '+ (page-1)*3+',3';
+    connection.query(sql,(err,data)=>{
+        response.end(JSON.stringify(data))
+    })
+    connection.end();
+})
+
+app.listen(8080);
\ No newline at end of file
diff --git "a/\351\231\210\345\246\231\345\250\237/20230306-\351\241\271\347\233\256\344\275\234\344\270\232/app.js" "b/\351\231\210\345\246\231\345\250\237/20230306-\351\241\271\347\233\256\344\275\234\344\270\232/app.js"
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From 3abe52cfcd87ad1bc09aa2de5c77775f867a3fb3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E5=A6=99=E5=A8=9F?= <2949988397@qq.com>
Date: Tue, 28 Mar 2023 07:36:18 +0000
Subject: [PATCH 3/3] =?UTF-8?q?=E5=88=A0=E9=99=A4=E6=96=87=E4=BB=B6=20?=
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diff --git "a/\351\231\210\345\246\231\345\250\237/\351\231\210\345\246\231\345\250\237.txt" "b/\351\231\210\345\246\231\345\250\237/\351\231\210\345\246\231\345\250\237.txt"
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