android客户端提交post请求到服务器

package com.Util;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.methods.PostMethod;


public class PostUtil //客户端代码
{
public static String postParam(NameValuePair[] n,String url) throws HttpException, IOException
{
/*
*n:传入的参数属性值组成的集合
*url:post要提交到的地址url
*result：服务器端相应结果
*/
HttpClient client = new HttpClient();
PostMethod post = new PostMethod(url);
post.setRequestBody(n);
client.executeMethod(post);
byte[] buff = StreamTool.readInputStream(post.getResponseBodyAsStream());
String result = new String(buff,"utf-8");
post.releaseConnection();
return result;
}


}
class StreamTool
{
public static byte[] readInputStream(InputStream inputStream) throws IOException
{
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
 
byte[] buffer = new byte[1024];
int len = 0;
 
while ((len=inputStream.read(buffer)) != -1)
{
outputStream.write(buffer, 0, len);
}
inputStream.close();
return outputStream.toByteArray();
}
}