java post 访问s2sh的网站，为什么接收不到post的参数？action中get，set方法都有。

Question

URL url=new URL("http://127.0.0.1:8080/HF/test/login");
HttpURLConnection connect=(HttpURLConnection)url.openConnection();

connect.setRequestMethod("POST");
connect.setDoInput(true);
connect.setDoOutput(true);
connect.setRequestProperty("content-type", "text/html");
connect.connect();
OutputStreamWriter out=new OutputStreamWriter(connect.getOutputStream(),"UTF-8");
out.write("uid={73930C20-2735-1109-A5ED-3ED0F15A16DD}&psw=7892A89464133727D5696C212E2B1CCCA83732EB&appver=baiguanchao");
out.flush();
out.close();

Answer 1

用流在后台可以得到，为什么get，set方法却无效？

Answer 2

OutputStreamWriter out=new OutputStreamWriter(connect.getOutputStream(),"UTF-8");
            out.write("uid={73930C20-2735-1109-A5ED-3ED0F15A16DD}&psw=7892A89464133727D5696C212E2B1CCCA83732EB&appver=baiguanchao");
            out.flush();
            out.close();
你将connect对象放进流里面，为什么又out.write()自己写…………不懂？

Answer 3

OutputStreamWriter out=new OutputStreamWriter(connect.getOutputStream(),"UTF-8");
            out.write("uid={73930C20-2735-1109-A5ED-3ED0F15A16DD}&psw=7892A89464133727D5696C212E2B1CCCA83732EB&appver=baiguanchao");
            out.flush();
            out.close();
你将connect对象放进流里面，为什么又out.write()自己写…………不懂？