http://wang09si.blog.163.com/blog/static/1701718042013631104658130/

package com.jxy.test;import java.io.BufferedReader;import java.io.DataOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;import java.net.URLEncoder;public class HttpURLConnectionPost { /**  * @param args  * @throws IOException   */ public static void main(String[] args) throws IOException {  readContentFromPost(); } public static void readContentFromPost() throws IOException {        // Post请求的url，与get不同的是不需要带参数        URL postUrl = new URL("http://www.open-open.com/home/do.php?ac=fefef&&ref");        // 打开连接        HttpURLConnection connection = (HttpURLConnection) postUrl.openConnection();              // 设置是否向connection输出，因为这个是post请求，参数要放在        // http正文内，因此需要设为true        connection.setDoOutput(true);        // Read from the connection. Default is true.        connection.setDoInput(true);        // 默认是 GET方式        connection.setRequestMethod("POST");               // Post 请求不能使用缓存        connection.setUseCaches(false);               connection.setInstanceFollowRedirects(true);               // 配置本次连接的Content-type，配置为application/x-www-form-urlencoded的        // 意思是正文是urlencoded编码过的form参数，下面我们可以看到我们对正文内容使用URLEncoder.encode        // 进行编码        connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");        // 连接，从postUrl.openConnection()至此的配置必须要在connect之前完成，        // 要注意的是connection.getOutputStream会隐含的进行connect。        connection.connect();        DataOutputStream out = new DataOutputStream(connection                .getOutputStream());        // The URL-encoded contend        // 正文，正文内容其实跟get的URL中 '? '后的参数字符串一致        String content = "username=" + URLEncoder.encode("timo", "UTF-8");        content = content +"&password="+URLEncoder.encode("jxy19910320", "UTF-8");        // DataOutputStream.writeBytes将字符串中的16位的unicode字符以8位的字符形式写到流里面        out.writeBytes(content);        out.flush();        out.close();                 BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));        String line;        StringBuffer sb = new StringBuffer("");        while ((line = reader.readLine()) != null) {        line = new String(line.getBytes(), "utf-8");sb.append(line);}        System.out.println(sb);        reader.close();        connection.disconnect();}}