1. package httpclient;  

  2.   

  3. import java.io.IOException;  

  4. import java.net.URLEncoder;  

  5.   

  6. import org.apache.commons.httpclient.HttpClient;  

  7. import org.apache.commons.httpclient.HttpMethod;  

  8. import org.apache.commons.httpclient.NameValuePair;  

  9. import org.apache.commons.httpclient.methods.GetMethod;  

  10. import org.apache.commons.httpclient.methods.PostMethod;  

  11.   

  12. public class HttpClientTest {  

  13.   

  14.     public static void main(String[] args) throws Exception{  

  15.         String url = "/webservices/DomesticAirline.asmx/getDomesticAirlinesTime";  

  16.         String host = "www.webxml.com.cn";  

  17.         String param = "startCity="+URLEncoder.encode("杭州""utf-8")+"&lastCity=&theDate=&userID=";  

  18.         HttpClient httpClient = new HttpClient();  

  19.         httpClient.getHostConfiguration().setHost(host, 80"http");          

  20.           

  21.         HttpMethod method = getMethod(url, param);  

  22.         //HttpMethod method = postMethod(url);  

  23.           

  24.         httpClient.executeMethod(method);  

  25.           

  26.         String response = method.getResponseBodyAsString();  

  27.         //String response = new String(method.getResponseBodyAsString().getBytes("ISO-8859-1"));                  

  28.         System.out.println(response);  

  29.     }  

  30.       

  31.     private static HttpMethod getMethod(String url,String param) throws IOException{  

  32.         GetMethod get = new GetMethod(url+"?"+param);  

  33.         get.releaseConnection();  

  34.         return get;  

  35.     }  

  36.           

  37.     private static HttpMethod postMethod(String url) throws IOException{   

  38.         PostMethod post = new PostMethod(url);  

  39.         post.setRequestHeader("Content-Type","application/x-www-form-urlencoded;charset=gbk");    

  40.         NameValuePair[] param = { new NameValuePair("startCity","杭州"),  

  41.                 new NameValuePair("lastCity","沈阳"),  

  42.                 new NameValuePair("userID",""),  

  43.                 new NameValuePair("theDate","") } ;  

  44.         post.setRequestBody(param);  

  45.         post.releaseConnection();  

  46.         return post;  

  47.     }  

  48. }  

如果PostMethod提交的是中文字符,需要加上相应的编码格式: 
post.setRequestHeader("Content-Type","application/x-www-form-urlencoded;charset=gbk");  

如果GetMethod提交的参数有中文字符,需要先转换成utf-8格式: 
URLEncoder.encode("杭州", "utf-8");

原文:http://honda418.iteye.com/blog/337052/