Java post 请求

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;  



import org.apache.commons.httpclient.Header;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.cookie.CookiePolicy;
import org.apache.commons.httpclient.methods.PostMethod;

public class Dopost {
    public String callHttpPost(String url,NameValuePair[] postData){        
        HttpClient httpclient = new HttpClient();
        PostMethod postMethod = new PostMethod(url);                  
        try{    
            postMethod.addParameters(postData);
            postMethod.getParams().setParameter("http.protocol.cookie-policy", CookiePolicy.BROWSER_COMPATIBILITY);    
            int statusCode = httpclient.executeMethod(postMethod);
            if(statusCode == HttpStatus.SC_MOVED_TEMPORARILY  ||   
                    statusCode == HttpStatus.SC_MOVED_TEMPORARILY){
                Header locationHeader = postMethod.getResponseHeader("Location");
                String location = null;
                if(locationHeader != null){
                    location = locationHeader.getValue();
                }
                postMethod = new PostMethod(location);                            
                postMethod.setRequestBody(postData);
                postMethod.getParams().setParameter("http.protocol.cookie-policy",CookiePolicy.BROWSER_COMPATIBILITY);
                int statusCode1 = httpclient.executeMethod(postMethod);
                if(statusCode1 != HttpStatus.SC_OK){
                    return "postError01:重定向访问没有成功！";
                }
            }
            if(statusCode != HttpStatus.SC_OK){
                return "postError02:访问没有成功！";
            }
            InputStream responseBody = postMethod.getResponseBodyAsStream();
            BufferedReader reader = new BufferedReader(new InputStreamReader(responseBody,"utf-8"));
            String line = reader.readLine();
            String repose="";
            while(line != null){
                repose+=new String(line.getBytes());
                line = reader.readLine();
            }
            return repose;
        }
        catch (HttpException e) {
            return "postError03:"+e;
        }
        catch (IOException e) {           
           return "postError04:"+e;
        }finally{
            postMethod.releaseConnection();
        }
    }
}