html5 - 通过post抓取的页面数据为啥不能展现在页面上-PHP中文网问答

这是node.js代码

var http = require("http"),
    fs = require("fs"),
    querystring = require("querystring"),
    url = require("url");

http.createServer(function(req,res){
    var postdata="";
    var query="what";
    var pathname = url.parse(req.url).pathname;

    req.setEncoding("utf8");
    if(pathname=="/"){
        var indexPage = fs.readFileSync("表单.html");
        res.writeHead(200,{"Content-Type":"text/html"});
        res.end(indexPage);
    }
    if(pathname=="/about"){
        req.on("data",function(chunk){
            postdata += chunk;
        });
        req.on("end",function() {
            console.log(postdata);
            query = querystring.parse(postdata);
            console.log(query);
        });
        res.writeHead(200, {"Content-Type":"text/plain"});
        console.log(query.Name);
        console.log(query.number);
        res.write(query.number+ "and "+query.number);
        res.end();
    }
    else{
        res.writeHead(404,{"Content-Type":"text/plain"});
        res.end("Can not find the source");
    }
}).listen(2000,"127.0.0.1");

console.log("The server is running at port 2000");

这是html代码




    
    表单填写



   Name: 
    SchoolNumber:
    




执行结果图：

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