Java模拟表单post提交 HttpClient

 

import java.io.IOException;
import java.io.UnsupportedEncodingException;

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.methods.PostMethod;
 
 
public class SendPostMethod { 
     
 
    public  String methodPost(String url,NameValuePair[] data){ 
         
        String response= "";//要返回的response信息 
        HttpClient httpClient = new HttpClient(); 
        PostMethod postMethod = new PostMethod(url); 
        // 将表单的值放入postMethod中 
        postMethod.setRequestBody(data); 
        // 执行postMethod 
        int statusCode = 0; 
        try { 
            statusCode = httpClient.executeMethod(postMethod); 
        } catch (HttpException e) { 
            e.printStackTrace(); 
        } catch (IOException e) { 
            e.printStackTrace(); 
        } 
        // HttpClient对于要求接受后继服务的请求，象POST和PUT等不能自动处理转发 
        // 301或者302 
        if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY 
                || statusCode == HttpStatus.SC_MOVED_TEMPORARILY) { 
            // 从头中取出转向的地址 
            Header locationHeader = postMethod.getResponseHeader("location"); 
            String location = null; 
            if (locationHeader != null) { 
                location = locationHeader.getValue(); 
                System.out.println("The page was redirected to:" + location); 
                response= methodPost(location,data);//用跳转后的页面重新请求。 
            } else { 
                System.err.println("Location field value is null."); 
            } 
        } else { 
            System.out.println(postMethod.getStatusLine()); 
 
            try { 
                response= postMethod.getResponseBodyAsString(); 
            } catch (IOException e) { 
                e.printStackTrace(); 
            } 
            postMethod.releaseConnection(); 
        } 
        return response; 
    } 
 
  
    public static void main(String[] args) throws UnsupportedEncodingException { 
         
        String url = "http://localhost/uchome/sendapi.php";
       
       
        NameValuePair name=new NameValuePair("name", "allen");
        NameValuePair password=new NameValuePair("password", "allen");
       
        NameValuePair[] data = {name,password};
       
      
        String response=new SendPostMethod().methodPost(url,data);
       
        System.out.println("********"+response);
        
       
    } 
 
} 

 

其中需要的jar包：

1、 commons-httpclient-3.1-rc1.zip http://jakarta.apache.org/commons/httpclient/downloads.html

2、commons-codec-1.3.jar    http://jakarta.apache.org/site/downloads/downloads_commons-codec.cgi

3、commons-logging-api.jar   在tomcat5.5中的Tomcat 5.5\bin目录下或者    http://jakarta.apache.org/site/downloads/downloads_commons-logging.cgi