public class GetPostUtil {public static final String urlBase="http://111.230.230.93:8080/LinkMySQL/servlet/";public static String sendPost(String url,String params){PrintWriter out = null;BufferedReader in = null;String json=null;try {URL realUrl = new URL(url);URLConnection conn = realUrl.openConnection();//设置通用的请求属性conn.setRequestProperty("accept","*/*");conn.setRequestProperty("connecttion","Keep-Alive");conn.setRequestProperty("user-agent","Mozilla/4.0(compatible;MSIE 6.0;Windows NT 5.1;SV1)");//发送post请求必须设置的两行conn.setDoOutput(true);conn.setDoInput(true);//获取URLConnection对象对应的输出流out = new PrintWriter(conn.getOutputStream());//发送请求参数out.print(params);//flush缓冲流的缓冲out.flush();//定义BufferdReader输入流来读取URL的响应in = new BufferedReader(new InputStreamReader(conn.getInputStream()));InputStream is = conn.getInputStream();json = netUtil.readString(is); return json;} catch (Exception e) {System.out.println("发送post请求出现异常！"+e);e.printStackTrace();}finally{try{if(out !=null){out.close();}if(in != null){in.close();}}catch(IOException e){e.printStackTrace();}}return json;}
}

public class netUtil {public static byte[] readBytes(InputStream is){try {byte[] buffer = new byte[1024];int len = -1 ;ByteArrayOutputStream baos = new ByteArrayOutputStream();while((len = is.read(buffer)) != -1){baos.write(buffer, 0, len);}baos.close();return baos.toByteArray();} catch (Exception e) {e.printStackTrace();}return null ;}public static String readString(InputStream is){return new String(readBytes(is));}
}