java http 请求get 和post

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代码，走您
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 TestIp {public static void main(String[] args) {String url = "http://ip.taobao.com/service/getIpInfo.php?ip=183.37.106.202";//url = "http://bbs.csdn.net/topics/300229433";try {sendGetHttp(url);sendPostHttp(url);} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}public static void sendGetHttp(String url) throws Exception {URL url2 = new URL(url);HttpURLConnection httpUrl = (HttpURLConnection) url2.openConnection();// 连接指定的网络资源httpUrl.connect();BufferedReader reader = new BufferedReader(new InputStreamReader(httpUrl.getInputStream()));StringBuffer stringBuffer = new StringBuffer();String lines;while ((lines = reader.readLine()) != null) {stringBuffer.append(lines);}String b = stringBuffer.toString();String newStr = new String(b.getBytes(), "gb2312");System.out.println("TestIp.sendHttp()" + newStr);newStr = new String(newStr);System.out.println("TestIp.sendHttp()" + newStr);String str = "\u4e2d\u56fd";System.out.println(str);}/** * 将url 一定要写对，一定可以的 * @param url * @throws IOException */public static void sendPostHttp(String url) throws IOException {            // Post请求的url，与get不同的是不需要带参数            URL postUrl = new URL(url);            // 打开连接            HttpURLConnection connection = (HttpURLConnection) postUrl.openConnection();            //打开读写属性，默认均为false            connection.setDoOutput(true);                            // 设置请求方式，默认为GET            connection.setRequestMethod("POST");            // Post 请求不能使用缓存            connection.setUseCaches(false);            // URLConnection.setFollowRedirects是static 函数，作用于所有的URLConnection对象。            // connection.setFollowRedirects(true);            //URLConnection.setInstanceFollowRedirects 是成员函数，仅作用于当前函数            connection.setInstanceFollowRedirects(true);            // 配置连接的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()会隐含的进行调用 connect()，所以这里可以省略            //connection.connect();            DataOutputStream out = new DataOutputStream(connection                            .getOutputStream());            //正文内容其实跟get的URL中'?'后的参数字符串一致            String content = " firstname= "+URLEncoder.encode(" 一个大肥人 ", " utf-8 ");            // DataOutputStream.writeBytes将字符串中的16位的 unicode字符以8位的字符形式写道流里面            out.writeBytes(content);            out.flush();            out.close(); // flush and close            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));            String line;            System.out.println(" ============================= ");            System.out.println(" Contents of post request ");            System.out.println(" ============================= ");            while ((line = reader.readLine()) != null) {                    System.out.println(line);            }            System.out.println(" ============================= ");            System.out.println(" Contents of post request ends ");            System.out.println(" ============================= ");            reader.close();            //connection.disconnect();     }}
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