Android使用URLConnection提交请求的实现

package com.fukaimei.getposttest;import android.util.Log;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.URL;import java.net.URLConnection;import java.util.List;import java.util.Map;public class GetPostUtil {  private static final String TAG = "GetPostUtil";    public static String sendGet(String url, String params) {    String result = "";    BufferedReader in = null;    try {      String urlName = url + "?" + params;      URL realUrl = new URL(urlName);      // 打开和URL之间的连接      URLConnection conn = realUrl.openConnection();      // 设置通用的请求属性      conn.setRequestProperty("accept", "*  public static String sendPost(String url, String params) {    PrintWriter out = null;    BufferedReader in = null;    String result = "";    try {      URL realUrl = new URL(url);      // 打开和URL之间的连接      URLConnection conn = realUrl.openConnection();      // 设置通用的请求属性      conn.setRequestProperty("accept", "*/*");      conn.setRequestProperty("connection", "Keep-Alive");      conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");      // 发送POST请求必须设置如下两行      conn.setDoOutput(true);      conn.setDoInput(true);      // 获取URLConnection对象对应的输出流      out = new PrintWriter(conn.getOutputStream());      // 发送请求参数      out.print(params);      // flush输出流的缓存      out.flush();      // 定义BufferedReader输入流来读取URL的响应      in = new BufferedReader(new InputStreamReader(conn.getInputStream()));      String line;      while ((line = in.readLine()) != null) {        result += "\n" + line;      }    } catch (Exception e) {      Log.d(TAG, "发送POST请求出现异常！" + e);      e.printStackTrace();    } finally { // 使用finally块来关闭输出流、输入流      try {        if (out != null) {          out.close();        }        if (in != null) {          in.close();        }      } catch (IOException e) {        e.printStackTrace();      }    }    return result;  }}