《转》Java模拟HTTP的Get和Post请求
import org.apache.commons.httpclient.HttpClient;import org.apache.commons.httpclient.HttpMethod;import org.apache.commons.httpclient.HttpStatus;import org.apache.commons.httpclient.URIException;import org.apache.commons.httpclient.methods.GetMethod;import org.apache.commons.httpclient.methods.PostMethod;import org.apache.commons.httpclient.params.HttpMethodParams;import org.apache.commons.httpclient.util.URIUtil;import org.apache.commons.lang.StringUtils;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.util.Map;/*** HTTP工具箱** @author leizhimin 2009-6-19 16:36:18*/public final class HttpTookit { private static Log log = LogFactory.getLog(HttpTookit.class); /** * 执行一个HTTP GET请求，返回请求响应的HTML * * @param url 请求的URL地址 * @param queryString 请求的查询参数,可以为null * @param charset 字符集 * @param pretty 是否美化 * @return 返回请求响应的HTML */ public static String doGet(String url, String queryString, String charset, boolean pretty) { StringBuffer response = new StringBuffer(); HttpClient client = new HttpClient(); HttpMethod method = new GetMethod(url); try { if (StringUtils.isNotBlank(queryString)) //对get请求参数做了http请求默认编码，好像没有任何问题，汉字编码后，就成为%式样的字符串 method.setQueryString(URIUtil.encodeQuery(queryString)); client.executeMethod(method); if (method.getStatusCode() == HttpStatus.SC_OK) { BufferedReader reader = new BufferedReader(new InputStreamReader(method.getResponseBodyAsStream(), charset)); String line; while ((line = reader.readLine()) != null) { if (pretty) response.append(line).append(System.getProperty("line.separator")); else response.append(line); } reader.close(); } } catch (URIException e) { log.error("执行HTTP Get请求时，编码查询字符串“" + queryString + "”发生异常！", e); } catch (IOException e) { log.error("执行HTTP Get请求" + url + "时，发生异常！", e); } finally { method.releaseConnection(); } return response.toString(); } /** * 执行一个HTTP POST请求，返回请求响应的HTML * * @param url 请求的URL地址 * @param params 请求的查询参数,可以为null * @param charset 字符集 * @return 返回请求响应的HTML */ public static String doPost(String url, Map<String, String> params, String charset) { StringBuffer response = new StringBuffer(); HttpClient client = new HttpClient(); PostMethod method = new PostMethod(url); //设置Http Post数据 if (params != null) { NameValuePair[] data = new NameValuePair[5]; int i=0; HttpMethodParams p = new HttpMethodParams(); for (Map.Entry<String, String> entry : params.entrySet()) { data[i]=new NameValuePair(entry.getKey(), entry.getValue()); i++; } method.setRequestBody(data); } try { client.executeMethod(method); if (method.getStatusCode() == HttpStatus.SC_OK) { System.out.println("OK"); }else{ System.out.println(method.getStatusCode()); } } catch (IOException e) { log.error("执行HTTP Post请求" + url + "时，发生异常！", e); } finally { method.releaseConnection(); } return response.toString(); } public static void main(String[] args) { String y = doGet("http://video.sina.com.cn/life/tips.html", null, "GBK", true); System.out.println(y); }}

?另外，将查看Java平台环境的代码给出来，很常用！

        public static void main(String[] args) {                Properties p = System.getProperties();                for (Map.Entry<Object, Object> entry : p.entrySet()) {                        System.out.println(entry.getKey() + " = " + entry.getValue());                }        }

?用到的包随文上传了。这个用的是HttpClient 3.1 版本