读流testDemo

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.ProtocolException;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
/**
	 * @author xuza
	 * @param params 参数
	 * @param url 字符串
	 * @return
	 */
	public static String sendChar(String params,String url){
		String sTotalString = "";
        try {
			URL newUrl = null;
			HttpURLConnection httpConn = null;
			OutputStream output = null;
			OutputStreamWriter outr = null;
			newUrl = new URL(url);
			httpConn = (HttpURLConnection) newUrl.openConnection();
			HttpURLConnection.setFollowRedirects(true);
			httpConn.setDoOutput(true);
			httpConn.setRequestMethod("POST");
			httpConn.setRequestProperty("Content-Type", "text/xml");
			httpConn.connect();
			output = httpConn.getOutputStream();
			outr = new OutputStreamWriter(output);
			// 写入请求参数
			outr.write(params.toString().toCharArray(), 0, params .toString().length());
			outr.flush();
			outr.close();
//        System.out.println("send ok");
			int code = httpConn.getResponseCode();
//        System.out.println("code " + code);
//        System.out.println(httpConn.getResponseMessage());
			//读取响应内容
			String sCurrentLine = "";
			if (code == 200)
			{
			    java.io.InputStream is = httpConn.getInputStream();
			    BufferedReader reader = new BufferedReader(
			            new InputStreamReader(is));
			    while ((sCurrentLine = reader.readLine()) != null)
			        if (sCurrentLine.length() > 0)
			            sTotalString = sTotalString + sCurrentLine.trim();
			} else
			{
			    sTotalString = "远程服务器连接失败,错误代码:" + code;
			}
			System.out.println("response:" + sTotalString);
		} catch (MalformedURLException e) {
			e.printStackTrace();
		} catch (ProtocolException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
        return sTotalString;
	}