Java 中使用HttpURLConnection发起POST 请求

private void httpUrlConnection() { 
try { 
String pathUrl = "http://172.20.0.206:8082/TestServelt/login.do"; 
// 建立连接 
URL url = new URL(pathUrl); 
HttpURLConnection httpConn = (HttpURLConnection) url.openConnection(); 

 
// //设置连接属性 
httpConn.setDoOutput(true);// 使用 URL 连接进行输出 
httpConn.setDoInput(true);// 使用 URL 连接进行输入 
httpConn.setUseCaches(false);// 忽略缓存 
httpConn.setRequestMethod("POST");// 设置URL请求方法 
String requestString = "客服端要以以流方式发送到服务端的数据..."; 

 
// 设置请求属性 
// 获得数据字节数据，请求数据流的编码，必须和下面服务器端处理请求流的编码一致 
byte[] requestStringBytes = requestString.getBytes(ENCODING_UTF_8); 
httpConn.setRequestProperty("Content-length", "" + requestStringBytes.length); 
httpConn.setRequestProperty("Content-Type", "application/octet-stream"); 
httpConn.setRequestProperty("Connection", "Keep-Alive");// 维持长连接 
httpConn.setRequestProperty("Charset", "UTF-8"); 
// 
String name = URLEncoder.encode("黄武艺", "utf-8"); 
httpConn.setRequestProperty("NAME", name); 

 
// 建立输出流，并写入数据 
OutputStream outputStream = httpConn.getOutputStream(); 
outputStream.write(requestStringBytes); 
outputStream.close(); 
// 获得响应状态 
int responseCode = httpConn.getResponseCode(); 

 
if (HttpURLConnection.HTTP_OK == responseCode) {// 连接成功 
// 当正确响应时处理数据 
StringBuffer sb = new StringBuffer(); 
String readLine; 
BufferedReader responseReader; 
// 处理响应流，必须与服务器响应流输出的编码一致 
 responseReader = new BufferedReader(new InputStreamReader(httpConn.getInputStream(), ENCODING_UTF_8)); 
while ((readLine = responseReader.readLine()) != null) { 
sb.append(readLine).append("\n"); 
} 
responseReader.close(); 
tv.setText(sb.toString()); 
} 
} catch (Exception ex) { 
ex.printStackTrace(); 
} 

 
}