java请求PHP接口

* 请求PHP接口
* @param pathUrl 接口地址
* @param params 请求参数
* @return httpUrlConnection
*/
public  String httpUrlConnection(String pathUrl, String params) {
try {
// 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 = "param="+params;

// 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("UTF-8");
httpConn.setRequestProperty("Content-length", "" + requestStringBytes.length);
httpConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
httpConn.setRequestProperty("Connection", "Keep-Alive");// 维持长连接
httpConn.setRequestProperty("Charset", "UTF-8");
//
// 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(), "UTF-8"));
while ((readLine = responseReader.readLine()) != null) {
sb.append(readLine).append("\n");
}
responseReader.close();
System.out.println(sb.toString());
return sb.toString();
}
} catch (Exception ex) {
ex.printStackTrace();
}
return "";
}