java写post请求

package com.mytesting;

import java.io.DataOutputStream;

import java.io.InputStream;

import java.net.URL;

import java.net.URLConnection;

import org.apache.commons.io.IOUtils;

public class post {

public static void main(String[] args) {

// TODO Auto-generated method stub

doHttpPost("http://172.18.3.27:8031/Activity/GetActivityList","{"TPID":123}");

//第一个是请求URL 第二个是body内的参数

}

public static String doHttpPost(String URL,String postBody) {

// System.out.println("发起的数据:" + postBody);

byte[] xmlData = postBody.getBytes();

InputStream instr = null;

try {

URL url = new URL(URL);

URLConnection urlCon = url.openConnection();

urlCon.setDoOutput(true);

urlCon.setDoInput(true);

urlCon.setUseCaches(false);

urlCon.setRequestProperty("Content-Type", "application/json");

urlCon.setRequestProperty("User-Agent", "app30007/3F845F3287A3C3F20A04B08C5074FC95/2B80541F-1C28-4FE7-8EEF-4A20D688A984/0/");

urlCon.setRequestProperty("Content-length",

String.valueOf(xmlData.length));

DataOutputStream printout = new DataOutputStream(

urlCon.getOutputStream());

printout.write(xmlData);

printout.flush();

printout.close();

instr = urlCon.getInputStream();

byte[] bis = IOUtils.toByteArray(instr);

String ResponseString = new String(bis, "UTF-8");

if ((ResponseString == null) || ("".equals(ResponseString.trim()))) {

System.out.println("返回空");

}

System.out.println("返回数据为:" + ResponseString);

return ResponseString;

} catch (Exception e) {

e.printStackTrace();

return "0";

} finally {

try {

// out.close();

instr.close();

} catch (Exception ex) {

return "0";

}

}

}

}