3.nodejs(三) 常用API
1.querystring
querystring: --- > qs npm i qs ==> qs:parse/stringify第三方插件,只有一个参数
JSON.parse 字符串转对象
JSON.stringify 对象转字符串
qs.parse() --- decode
qs.stringify() --- encode
parse/stringify(str/json,第一次切割符号,第二次切割符号)
qs.escape() 编码 encodeURIComponent
qs.unescape() 解码 decodeURIComponent
qs.decode 对象转字符串
qs.encode 字符串转对象
1.qs.parse(); qs.stringify();
qs.js
var qs = require("querystring");
var str = "a=12&b=5"
//{a:12,b:5}
var json = qs.parse(str);
console.log(json);
console.log(qs.stringify(json));
res:
my@my-THINK MINGW64 /d/workspace/7.11
$ node qs
{ a: '12', b: '5' }
a=12&b=5
qs3.js
//qs.parse/stringify(str,第一次切割的符号,第二次切割的符号)
var qs = require("querystring");
var str = "a|12=b|5=age|20";
//qs.parse/stringify(str,第一次切割的符号,第二次切割的符号)
var json = qs.parse(str,"=","|");
console.log(json);
console.log(qs.stringify(json,"=","|"));
res
my@my-THINK MINGW64 /d/workspace/7.11
$ node qs3
{ a: '12', b: '5', age: '20' }
a|12=b|5=age|20
qs4.js
引入第三方模块 npm i qs
//qs.parse/stringify(str)
后面不能跟分隔符号
var qs = require("qs");
var str = "a=12&b=5";
var json = qs.parse(str);
console.log(json);
console.log((qs.stringify(json)));
res:
my@my-THINK MINGW64 /d/workspace/7.11
$ node qs4
{ a: '12', b: '5' }
a=12&b=5
2.qs.escape();编码 qs.unescape();解码
qs2.js
var qs = require("querystring");
var str = "aaa中文";
var code = encodeURIComponent(str);
console.log(code);
console.log(decodeURIComponent(code));
console.log("----------------------");
var code = qs.escape(str);
console.log(code);
console.log(qs.unescape(code));
res:
my@my-THINK MINGW64 /d/workspace/7.11
$ node qs2
aaa%E4%B8%AD%E6%96%87
aaa中文
----------------------
aaa%E4%B8%AD%E6%96%87
aaa中文
3.
qs.encode()//转字符串
qs.decode()//转对象 parse
qs5.js
var qs = require("querystring");
//encode|decode
//var str = "aaa中文";
var str = "a=12&b=5";
var str = {a:12,b:5};
var code = qs.encode(str);//转字符串 stringify
console.log(code);
console.log(qs.decode(code));//转对象 parse
res:
my@my-THINK MINGW64 /d/workspace/7.11
$ node qs5
a=12&b=5
{ a: '12', b: '5' }
2.url
url：
url.parse()--->urlObj
url.format(urlObj)--> strUrl
url.resolve(from, to);
URLSearchParams new URLSearchParams();
地址组成：
http://www.baidu.com:80/index.html?user=aaa&pass=123#page6
http:// www.baidu.com :80 /index.html ?user=aaa&pass=123 #page6
协议 域名 端口 路径(资源地址) 数据 锚点 哈希hash
location
Url {
protocol: 'http:',
slashes: true,
auth: null,
host: 'www.baidu.com:80',
port: '80',
hostname: 'www.baidu.com',
hash: '#page6',
search: '?user=aaa&pass=123',
query: 'user=aaa&pass=123',
pathname: '/index.html',
path: '/index.html?user=aaa&pass=123',
href: 'http://www.baidu.com:80/index.html?user=aaa&pass=123#p
age6' }
URL {
href: 'http://www.baidu.com/index.html?user=aaa&pass=123#page6',
origin: 'http://www.baidu.com',
protocol: 'http:',
username: '',
password: '',
host: 'www.baidu.com',
hostname: 'www.baidu.com',
port: '',
pathname: '/index.html',
search: '?user=aaa&pass=123',
searchParams: URLSearchParams { 'user' => 'aaa', 'pass' => '123'
},
hash: '#page6' }
1.
.parse()转成对象
.format()转成字符串
url1.js
var modUrl = require("url");
var url = "http://www.baidu.com:80/index.html?user=aaa&pass=123#page6";
var urlObj = modUrl.parse(url);
console.log(1,urlObj);
console.log(2,modUrl.format(urlObj));
res:
my@my-THINK MINGW64 /d/workspace/7.11
$ node url1
1 Url {
protocol: 'http:',
slashes: true,
auth: null,
host: 'www.baidu.com:80',
port: '80',
hostname: 'www.baidu.com',
hash: '#page6',
search: '?user=aaa&pass=123',
query: 'user=aaa&pass=123',
pathname: '/index.html',
path: '/index.html?user=aaa&pass=123',
href: 'http://www.baidu.com:80/index.html?user=aaa&pass=123#page6' }
2 'http://www.baidu.com:80/index.html?user=aaa&pass=123#page6'
url2.js
var modUrl = require("url");
var url = "http://www.baidu.com:9000/index.html?user=aaa&pass=123#page6";
console.log(1,new modUrl.Url(url));
console.log(2,new modUrl.URL(url));
res:
my@my-THINK MINGW64 /d/workspace/7.11
$ node url2
1 Url {
protocol: null,
slashes: null,
auth: null,
host: null,
port: null,
hostname: null,
hash: null,
search: null,
query: null,
pathname: null,
path: null,
href: null }
2 URL {
href: 'http://www.baidu.com:9000/index.html?user=aaa&pass=123#page6',
origin: 'http://www.baidu.com:9000',
protocol: 'http:',
username: '',
password: '',
host: 'www.baidu.com:9000',
hostname: 'www.baidu.com',
port: '9000',
pathname: '/index.html',
search: '?user=aaa&pass=123',
searchParams: URLSearchParams { 'user' => 'aaa', 'pass' => '123' },
hash: '#page6' }
url3.js
.resolve(),替换路径
var modUrl = require("url");
console.log(modUrl.resolve('http://localhost:9000/login', 'index'));
console.log(modUrl.resolve('http://localhost:9000/login', '/index'));
console.log(modUrl.resolve('http://localhost:9000/users/login', 'index'));
//不加/只替换最后一个相对路径
console.log(modUrl.resolve('http://localhost:9000/users/login', '/index'));
//加/替换绝对路径
res:
my@my-THINK MINGW64 /d/workspace/7.11
$ node url3
http://localhost:9000/index
http://localhost:9000/index
http://localhost:9000/users/index
http://localhost:9000/index
url4.js
URLSearchParams
new URLSearchParams();
var modUrl = require("url");
var params = new modUrl.URLSearchParams();
console.log(params);
params.append("user","aaa");
params.append("pass","123");
//append添加数据
// user=aaa&pass=123
console.log(params);
console.log(params.toString());
res:
my@my-THINK MINGW64 /d/workspace/7.11
$ node url4
URLSearchParams {}
URLSearchParams { 'user' => 'aaa', 'pass' => '123' }
user=aaa&pass=123
url5.js
//node 10以上,才可以
var params = new URLSearchParams();
params.append("user","aaa");
params.append("pass","123");
// user=aaa&pass=123
console.log(params.toString());
res:
my@my-THINK MINGW64 /d/workspace/7.11
$ node url5
user=aaa&pass=123
3.path
path:
path.parse(path)
path.format(pathObject)
path.basename(path)
path.dirname(path) 路径
path.extname(path)
path.join() 相对路径 路径拼接
path.relative() 获取的相对路径 路线图
path.resolve() 绝对路径 路径拼接 碰到绝对路径 会替换
__dirname 绝对路径
__filename 绝对地址包含文件名
global 全集对象 相当于 window
path1.js
var path = require("path");
//win: \ linux /
var str = "D:\\wamp64\\www\\20180711\\path.js"; //window要用双斜线,向右撇
var str = "D:/wamp64/www/20180711/path.js";
var pathObj = path.parse(str);
console.log(pathObj);//字符串转对象
console.log(path.format(pathObj));//对象转字符串
res:
my@my-THINK MINGW64 /d/workspace/7.11
$ node path1
{ root: 'D:/',
dir: 'D:/wamp64/www/20180711',
base: 'path.js',
ext: '.js',
name: 'path' }
D:/wamp64/www/20180711\path.js
path2.js
var path = require("path");
var str = "D:/wamp64/www/20180711/path.js";
console.log(path.parse(str));
console.log("--------------------------");
console.log(path.basename(str));//文件名
console.log(path.dirname(str)); //路径
console.log(path.extname(str));//文件后缀 带点
console.log("--------------------------");
console.log(__dirname);
console.log(__filename);
res:
my@my-THINK MINGW64 /d/workspace/7.11
$ node path2
{ root: 'D:/',
dir: 'D:/wamp64/www/20180711',
base: 'path.js',
ext: '.js',
name: 'path' }
--------------------------
path.js
D:/wamp64/www/20180711
.js
--------------------------
D:\workspace\7.11
D:\workspace\7.11\path2.js
path31.js
var path = require("path");
console.log("www"+"/index.html");//只是拼接
console.log(path.join("www","/index.html"));
console.log(path.join("www","/////index.html"));//自动去除多余的/
console.log(path.join("www","index.html"));//自动添加/
res:
my@my-THINK MINGW64 /d/workspace/7.11
$ node path31
www/index.html
www\index.html
www\index.html
www\index.html
path32.js
var path = require("path");
console.log("www"+"/index.html");
console.log(path.join("\\a","b","c"));
console.log(path.join("/a","b","c"));
console.log(path.join("a","/b","../c")); //../返回上级目录
res:
my@my-THINK MINGW64 /d/workspace/7.11
$ node path32
www/index.html
\a\b\c
\a\b\c
a\c
path33.js
var path = require("path");
console.log(path.relative('/data/orandea/test/aaa', '/data/orandea/impl/bbb'));
console.log(path.relative('C:\\orandea\\test\\aaa', 'C:\\orandea\\impl\\bbb'));
res:
my@my-THINK MINGW64 /d/workspace/7.11
$ node path33
..\..\impl\bbb
..\..\impl\bbb
path34.js
var path = require("path");
/* resolve返回绝对路径,参数前不加/,
在后面添加,加/直接替换全部 */
console.log(path.resolve("a","b","c"));
console.log(path.resolve("a","/b","/c"));
console.log(path.resolve("a/b/c","../d","../e"));
res:
my@my-THINK MINGW64 /d/workspace/7.11
$ node path34
D:\workspace\7.11\a\b\c
D:\c
D:\workspace\7.11\a\b\e
4.Buffer
Buffer 二进制流
操作方式和字符串类似
16进制 0-F
"a".chatCodeAt(0).toString(16); ascii:97 hex:61
97: a (ASCII)
String.fromCharCode(code);//ASCII转字符
中文的范围 4e00 - 9fa5
\u4e00(直接转成中文)
0X4e00(转成十进制)
hex: 16进制
Buffer.from(...); new Buffer(废弃)
buf1.js
var str = "abc";
//var buf = new Buffer(str);
var buf = Buffer.from(str);
console.log(buf);
//16进制 中文的范围 4e00 - 9fa5
console.log("a".charCodeAt(0).toString(16));
res:
$ node buf1
<Buffer 61 62 63>
61
buf2.js
const buf = Buffer.from('abc', 'ascii');
console.log(buf);
console.log(buf.toString('hex'));
console.log(buf.toString('base64'));
res:
$ node buf2
<Buffer 61 62 63>
616263
YWJj
buf3.js
const buf = Buffer.from([1, 2, 3]);
console.log(buf);
for(var i = 0; i < buf.length; i++){
console.log(buf[i]);
}
// Prints:
// 1
// 2
// 3
for (const b of buf) {
console.log(b);
}
res:
$ node buf3
<Buffer 01 02 03>
1
2
3
1
2
3
buf4.js
var buf = Buffer.from([0x61, 0x62, 0x63]);
console.log(buf.toString());
var buf = Buffer.from("abc");
console.log(buf.toString());
res:
$ node buf4
abc
abc
buf42.js
var buf1 = Buffer.from("abc");
//var buf2 = Buffer.from(buf1);
var buf2 = Buffer.from("abc");
console.log(buf1.toString(),buf2.toString());//abc abc
console.log(buf1 == buf2);//false
console.log(buf1 === buf2);//false
console.log(buf1.toString() == buf2.toString());//true
console.log(Buffer.compare(buf1, buf2));//0 , 相同为0,不同为-1
res:
$ node buf42
abc abc
false
false
true
0
buf5.js
var str = "abc中文";
var buf = Buffer.from(str);
console.log(buf);
console.log(str.length);
console.log(buf.length);
console.log(Buffer.byteLength(buf));
res:
$ node buf5
<Buffer 61 62 63 e4 b8 ad e6 96 87>
5
9
9
buf6.js
var str = "abc";
var arr = [];
for(var i = 0; i < str.length; i++){
arr.push(Buffer.from(str[i]));//61 62 62 arr[buf1,buf2,buf3]
}
console.log(arr);
console.log(Buffer.concat(arr));
res:
$ node buf6
[ <Buffer 61>, <Buffer 62>, <Buffer 63> ]
<Buffer 61 62 63>
buf7.js
Buffer.isBuffer() 判断是否是Buffer
var str = "abc";
console.log(Buffer.isBuffer(str));
var buf = Buffer.from(str);
console.log(Buffer.isBuffer(buf));
res:
$ node buf7
false
true
buf8.js
.equals()判断buffer是否相等
const buf1 = Buffer.from('ABC');
const buf2 = Buffer.from('414243', 'hex');//ABC
const buf3 = Buffer.from('ABCD');
// 输出: true
console.log(buf1.equals(buf2));
// 输出: false
console.log(buf1.equals(buf3));
res:
$ node buf8
true
false
buf9.js
/*
buf.includes/indexOf
*/
var buf = Buffer.from('abcdef');
console.log(buf.includes("def"));//是否包含"def"
console.log(buf.indexOf("def"));
//是否包含"def",有的话输出开始下标,没有的话输出-1;
res:
$ node buf9
true
3
buf10.js
/*
buf.includes/indexOf
*/
var buf = Buffer.from('abcdef');
console.log(buf.keys());
console.log(buf.values());
//buf是一个对象,需循环输出key和value
console.log("------keys------------");
for(var n of buf.keys()){
console.log(n);
}
console.log("------values------------");
for(var n of buf.values()){
console.log(n,String.fromCharCode(n));
}
res:
$ node buf10
{}
{}
------keys------------
0
1
2
3
4
5
------values------------
97 'a'
98 'b'
99 'c'
100 'd'
101 'e'
102 'f'
5.events
evt1.js
var EventEmitter = require("events");
console.log(EventEmitter == EventEmitter.EventEmitter);
res:
$ node evt1
true
evt21.js
var EventEmitter = require("events");
var ev = new EventEmitter();
console.log(ev.on == ev.addListener);
//添加事件
//addListener/on
ev.on("sum",function(a,b){
console.log("sum:",a+b);
});
ev.addListener("abc",function(){
console.log("abc:");
});
//触发
console.log(1,ev.emit("sum",12,5));
console.log(2,ev.emit("abc"));
res:
$ node evt21
true
sum: 17
1 true
abc:
2 true
evt22.js
var EventEmitter = require("events");
var ev = new EventEmitter.EventEmitter();
console.log(ev.on == ev.addListener);
//添加事件
//addListener/on
ev.on("sum",function(a,b){
console.log("sum:",a+b);
});
ev.addListener("abc",function(){
console.log("abc:");
});
//触发
console.log(1,ev.emit("sum",12,5));
console.log(2,ev.emit("abc"));
res:
$ node evt22
true
sum: 17
1 true
abc:
2 true
evt3.js
var EventEmitter = require("events");
var ev = new EventEmitter();
console.log(1,ev.on == ev.addListener);
//添加事件
ev.prependListener("abc",function(){
console.log(2,"abc:");
});
//触发
console.log(3,ev.emit("abc"));
res:
$ node evt3
1 true
2 'abc:'
3 true
6.fs 文件目录
文件
读写
fs.readFile 读
fs.writeFile 写
fs.appendFile 添加内容
fs.unlink 删除
fs.copyFile 复制
目录
fs.mkdir 创建
fs.rmdir 删除
fs.readdir 读
状态
文件或者目录是否存在
fs.exists 废弃
fs.access
判断是否是文件或者目录
fs.stat(path,function(stats){
stats.isFile()/isDirectory()
})
监听
fs.watch(filename[, options][, listener])
fs.watchFile(filename[, options], listener)
fs1.js
写比读先执行
var fs = require("fs");
//readFile/Sync
//读
fs.readFile("a.txt",function(err,data){
console.log(1,err,data);
});
//写,找到a.txt没有的话创建,添加"aaa"到a.txt
fs.writeFile("a.txt","bbb",function(err){
console.log(2,err); //返回null,表示没有错误
});
res:
$ node fs1
2 null
1 null <Buffer 62 62 62>
fs2.js
//copyFile("源文件","目标文件",回调函数)
var fs = require("fs");
//拷贝 1、先读 2、再写
//读
/*fs.readFile("a.txt",function(err,data){
if(err){
console.log("读取文件失败");
} else {
//写
fs.writeFile("b.txt",data,function(err){
if(err){
console.log("拷贝失败");
} else {
console.log("拷贝成功");
}
});
}
});
*/
//copyFile("源文件","目标文件",回调函数)
fs.copyFile("a.txt","b.txt",function(err){
if(err){
console.log("拷贝失败");
} else {
console.log("拷贝成功");
}
});
rse:
$ node fs2
拷贝成功
fs3.js
//appendFile 创建文件或者追加
var fs = require("fs");
//appendFile 创建文件或者追加
fs.appendFile("b.txt","append",function(err){
console.log(err);
});
res:
$ node fs3
null
fs4.js
unlink 删除文件 不能删除目录
var fs = require("fs");
//unlink 删除文件 不能删除目录
fs.unlink("b.txt",function(err){
console.log(err);
});
res:
$ node fs4
null
fs51.js
//fs.mkdir()创建目录
var fs = require("fs");
//创建目录
fs.mkdir("abc", function(err){
console.log(err);
});
res:
$ node fs51
null
fs52.js
var fs = require("fs");
//删除目录
fs.rmdir("abc", function(err){
console.log(err);
});
res:
$ node fs52
null
fs53.js
var fs = require("fs");
//读取目录
fs.readdir("abc", function(err,res){
console.log(err,res);
});
res:
$ node fs53
null [ 'youarebeautiful' ]
fs61.js
fs.exists
//判断文件和目录
//文件状态 文件、目录是否存在 是文件 还是目录
var fs = require("fs");
//判断文件和目录
//文件状态 文件、目录是否存在 是文件 还是目录
fs.exists("abcd", (exists) => {
console.log(exists);
});
res:
$ node fs61
true
fs62.js
fs.access
var fs = require("fs");
//判断文件和目录
//文件状态 文件、目录是否存在 是文件 还是目录
fs.access("a.txt", (err) => {
console.log(err);
});
res:
$ node fs62
null
fs63.js
var fs = require("fs");
//判断文件和目录
//文件状态 文件、目录是否存在 是文件 还是目录
fs.stat("abc", (err,stats) => {
//stats.isDirectory()是否是目录/stats.isFile()是否是文件
console.log(err,stats.isFile(),stats.isDirectory());
});
res:
$ node fs63
null false true
fs71.js
var fs = require("fs");
//可以监听文件和目录
//监听有范围限制 只有一层
fs.watch("a.txt", (eventType, filename) => {
console.log(`事件类型是: ${eventType}-----${filename}`);
});
res:
$ node fs71
事件类型是: change-----a.txt
事件类型是: change-----a.txt
fs72.js
var fs = require("fs");
//可以监听文件 目录 有延迟 目录的文件的修改监听不到 最好用来监听文件
fs.watchFile("abc", (curr, prev) => {
/*console.log(curr);
console.log(prev);*/
console.log(curr.mtime);
});
/*Stats {
dev: 4145068239,
mode: 16822,
nlink: 1,
uid: 0,
gid: 0,
rdev: 0,
blksize: undefined,
ino: 844424930155958,
size: 0,
blocks: undefined,
atimeMs: 1531312004235.5886,
mtimeMs: 1531312004235.5886,
ctimeMs: 1531312004235.5886,
birthtimeMs: 1531311081220.7952,
atime: 2018-07-11T12:26:44.236Z,
mtime: 2018-07-11T12:26:44.236Z,
ctime: 2018-07-11T12:26:44.236Z,
birthtime: 2018-07-11T12:11:21.221Z } */
res:
$ node fs72
2018-07-11T12:24:44.050Z
7.流stream
流stream
输入流、输出流
var rs = fs.createReadStream("src");
var ws = fs.createWriteStream("dist");
管道pipe
rs.pipe(ws);
拆解：
//一边读一边写
rs.on("data",function(data){
ws.wrtie(data);
});
rs.on("end",function(data){
ws.end(fn);
});
rs.on("error",function(){...})
ws.on("error",function(){...})
gzip:
1、const zlib = require('zlib');
2、必须设置一个头：
res.writeHead(200, { 'content-encoding': 'gzip' });
3、通过管道
rs.pipe(zlib.createGzip()).pipe(res);
stream1.js
var fs = require("fs");
//输入流 输出
var rs = fs.createReadStream("a.txt");
var ws = fs.createWriteStream("b.txt");
//管道 pipe
rs.pipe(ws);将a.txt中的内容一步一步写入b.txt
res:
$ node stream1
stream2.js
var fs = require("fs");
//输入流
var rs = fs.createReadStream("a.txt");
rs.on("data",function(data){
console.log(data);
});
rs.on("end",function(){
console.log("读完了");
});
rs.on("error",function(){
console.log("读取文件失败");
});
res:
$ node stream2
<Buffer 61 61 61>
读完了
stream3.js
var fs = require("fs");
var ws = fs.createWriteStream("b.txt");
ws.write("abc",function(){
console.log("write完了");
});
ws.end("end",function(){
console.log("end写完了");
});
res:
$ node stream3
write完了
end写完了
stream4.js
var fs = require("fs");
var rs = fs.createReadStream("a.txt");
var ws = fs.createWriteStream("b.txt");
rs.on("data",function(data){
ws.write(data);
});
rs.on("end",function(){
console.log("读完了");
ws.end(function(){
console.log("写完了");
});
});
res:
$ node stream4
读完了
写完了
server.js
前面的服务器可以写成流
大文件可以压缩
var http = require("http");
var fs = require("fs");
var zlib = require("zlib");
var server = http.createServer(function(req,res){
var url = req.url;
if(url == "/favicon.ico") return;
/*fs.readFile("www"+url,function(err,data){
if(err){
res.end("404");
} else {
res.end(data);
}
});*/
res.writeHead(200, { 'content-encoding': 'gzip' });
var rs = fs.createReadStream("www"+url);
rs.pipe(zlib.createGzip()).pipe(res);
});
server.listen(9000);
完整服务器代码:
server.js
var http = require("http");
var fs = require("fs");
var zlib = require("zlib");
var modUrl = require("url");
var qs = require("querystring");
var users = {aaa:123};
var server = http.createServer(function(req,res){
var url = req.url;
var str = "";
req.on("data",function(data){
str += data;
})
req.on("end",function(){
var urlObj = modUrl.parse(url,true);
url = urlObj.pathname;
var GET = urlObj.query;
var POST = qs.parse(str);
var params = req.method == "POST" ? POST : GET;
var username = params.user;
var password = params.pass;
if(url == "/login"){
if(users[username]){
if(users[username] == password){
res.end(JSON.stringify({"error":1,"msg":"登陆成功"}));
}else{
res.end(JSON.stringify({"error":0,"msg":"用户名或者密码错误"}));
}
}else{
res.end(JSON.stringify({"error":0,"msg":"用户名或者密码错误"}));
}
}else if(url == "/reg"){
if(users[username]){
res.end(JSON.stringify({"error":0,"msg":"用户名已存在"}));
}else{
users[username] = password;
res.end(JSON.stringify({"error":1,"msg":"注册成功"}));
}
}else if(url == "/favicon.ico") {
return;
}else{
res.writeHead(200, { 'content-encoding': 'gzip' });
var rs = fs.createReadStream("www"+url);
rs.pipe(zlib.createGzip()).pipe(res);
console.log(res);
}
})
});
server.listen("9000",function(){
console.log("服务器已打开!");
})
user.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script src="jquery.js"></script>
<script>
$(function(){
$oUser = $("#user");
$oPass = $("#pass");
$oLogin = $("#login");
$oReg = $("#reg");
$oLogin.click(function(){
$.ajax({
type:"get",
url:"/login",
data:{
user:$oUser.val(),
pass:$oPass.val()
},
async:true,
success:function(str){
alert(str);
}
});
});
$oReg.click(function(){
$.ajax({
type:"post",
url:"/reg",
data:{
user:$oUser.val(),
pass:$oPass.val()
},
async:true,
success:function(str){
alert(str);
}
});
});
})
</script>
</head>
<body>
用户名:<input id = "user" type="text" value="aaa"/><br />
密码: <input id ="pass" type="text" value="123"/><br />
<input id = "login" type="button" value="登录"/>
<input id = "reg" type="button" value="注册"/>
</body>
</html>
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