java 发送http请求

在这里介绍一个关于发送和接受http的示例，关于URL和HttpURLConnection类请参考jdk.

String method = "POST";
String content = "<name>dd</name>";
URL url = new URL(http://192.168.100.77/test.jsp);

HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();

urlConnection.setRequestMethod(method);
urlConnection.setDoOutput(true);//URL 连接可用于输入和/或输出
urlConnection.setDoInput(true);//URL 连接可用于输入和/或输出
urlConnection.setUseCaches(false);

//设置http头
urlConnection.addRequestProperty("POST","/  HTTP/1.1");
urlConnection.addRequestProperty("Content-Typeapplication/client");
urlConnection.addRequestProperty("Content-Lengt","1000");

//设置包体
urlConnection.getOutputStream().write(content.toString().getBytes());
urlConnection.getOutputStream().flush();
urlConnection.getOutputStream().close();


//取得返回包体
            InputStream in = urlConnection.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(
                    new InputStreamReader(in));//取得返回内容
            httpResponser.contentCollection = new Vector<String>();
            StringBuffer temp = new StringBuffer();
            String line = bufferedReader.readLine();
            System.out.println("lenth:"+urlConnection.getContentLength());
            while (line != null) {
                httpResponser.contentCollection.add(line);
                temp.append(line).append(" ");
                line = bufferedReader.readLine();
            }

//取得返回http头信息
          String content-type = urlConnection.getHeaderField("Content-Type");
          String contentLenth = urlConnection.getHeaderField("Content-Length");
          Sring code = urlConnection.getHeaderField("errorcode");