HttpClient 4 使用POST方式提交普通表单数据的例子

import java.io.BufferedReader;  
import java.io.InputStreamReader;  
import org.apache.http.HttpEntity;  
import org.apache.http.HttpHost;  
import org.apache.http.HttpResponse;  
import org.apache.http.client.methods.HttpPost;  
import org.apache.http.conn.params.ConnRoutePNames;  
import org.apache.http.entity.StringEntity;  
import org.apache.http.impl.client.DefaultHttpClient;  
 
/**
* HttpClient 4 使用POST方式提交普通表单数据的例子.
*
* @author JAVA世纪网(java2000.net, laozizhu.com)
*/ 
public class HttpClientPost {  
  public static void main(String[] args) throws Exception {  
     DefaultHttpClient httpclient = new DefaultHttpClient();  
    // 代理的设置  
     HttpHost proxy = new HttpHost("10.60.8.20", 8080);  
     httpclient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);  
    // 目标地址  
     HttpPost httppost = new HttpPost("http://www.java2000.net/login.jsp");  
     System.out.println("请求: " + httppost.getRequestLine());  
    // 构造最简单的字符串数据  
     StringEntity reqEntity = new StringEntity("username=test&password=test");  
    // 设置类型  
     reqEntity.setContentType("application/x-www-form-urlencoded");  
    // 设置请求的数据  
     httppost.setEntity(reqEntity);  
    // 执行  
     HttpResponse response = httpclient.execute(httppost);  
     HttpEntity entity = response.getEntity();  
     System.out.println("----------------------------------------");  
     System.out.println(response.getStatusLine());  
    if (entity != null) {  
       System.out.println("Response content length: " + entity.getContentLength());  
     }  
    // 显示结果  
     BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent(), "UTF-8"));  
     String line = null;  
    while ((line = reader.readLine()) != null) {  
       System.out.println(line);  
     }  
    if (entity != null) {  
       entity.consumeContent();  
     }  
   }  
}