调用Url

//from n o w  j a v a  . c o m

//package com.nowjava;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;


import java.net.URL;

import java.net.URLConnection;


import java.net.URLEncoder;


import java.util.Map;


public class Main {

    public static String callUrl(String urlString,/*from nowjava - 时代Java*/

            Map<String, String> paramMap) {

        String urlReturnValue = "";

        try {

            // Construct data

            StringBuffer dataBuf = new StringBuffer();

            boolean firstParam = true;

            for (String paramKey : paramMap.keySet()) {

                if (!firstParam)

                    dataBuf.append("&");

                dataBuf.append(URLEncoder.encode(paramKey, "UTF-8"))

                        .append("=")

                        .append(URLEncoder.encode(paramMap.get(paramKey),

                                "UTF-8"));

                firstParam = false;

            }

            String data = dataBuf.toString();


            // Send data

            URL url = new URL(urlString);

            URLConnection conn = url.openConnection();

            conn.setDoOutput(true);

            OutputStreamWriter wr = new OutputStreamWriter(

                    conn.getOutputStream());

            wr.write(data);

            wr.flush();


            // Get the response

            BufferedReader rd = new BufferedReader(new InputStreamReader(

                    conn.getInputStream()));

            String l