public class GetPostUtil  {      /**      * 向指定URL发送GET方法的请求      *       * @param url      *            发送请求的URL      * @param params      *            请求参数，请求参数应该是name1=value1&name2=value2的形式。      * @return URL所代表远程资源的响应      */      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", "*/*");              conn.setRequestProperty("connection", "Keep-Alive");              conn.setRequestProperty("user-agent",                  "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");              // 建立实际的连接              conn.connect();              // 获取所有响应头字段              Map<String, List<String>> map = conn.getHeaderFields();              // 遍历所有的响应头字段              for (String key : map.keySet())              {                  System.out.println(key + "--->" + map.get(key));              }              // 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)          {              System.out.println("发送GET请求出现异常！" + e);              e.printStackTrace();          }          // 使用finally块来关闭输入流          finally          {              try              {                  if (in != null)                  {                      in.close();                  }              }              catch (IOException ex)              {                  ex.printStackTrace();              }          }          return result;      }        /**       * 向指定URL发送POST方法的请求       *        * @param url       *            发送请求的URL       * @param params       *            请求参数，请求参数应该是name1=value1&name2=value2的形式。       * @return URL所代表远程资源的响应       */      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输出流的缓冲              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)          {              System.out.println("发送POST请求出现异常！" + e);              e.printStackTrace();          }          // 使用finally块来关闭输出流、输入流          finally          {              try              {                  if (out != null)                  {                      out.close();                  }                  if (in != null)                  {                      in.close();                  }              }              catch (IOException ex)              {                  ex.printStackTrace();              }          }          return result;      }  }  

public class GetPostMain extends Activity  {      Button get , post;      EditText show;      @Override      public void onCreate(Bundle savedInstanceState)      {          super.onCreate(savedInstanceState);          setContentView(R.layout.main);          get = (Button) findViewById(R.id.get);          post = (Button) findViewById(R.id.post);          show = (EditText)findViewById(R.id.show);          //利用Handler更新UI          final Handler h = new Handler(){              @Override              public void handleMessage(Message msg) {                  if(msg.what==0x123){                      show.setText(msg.obj.toString());                  }              }          };                    get.setOnClickListener(new OnClickListener()          {              @Override              public void onClick(View v)              {                  new Thread(new AccessNetwork("GET", "http://192.168.1.88:8080/abc/a.jsp", null, h)).start();              }                     });          post.setOnClickListener(new OnClickListener()          {              @Override              public void onClick(View v)              {                  new Thread(new AccessNetwork("POST", "http://192.168.1.88:8080/abc/login.jsp", "name=crazyit.org&pass=leegang", h)).start();              }                     });       }  }  class AccessNetwork implements Runnable{      private String op ;      private String url;      private String params;      private Handler h;            public AccessNetwork(String op, String url, String params,Handler h) {          super();          this.op = op;          this.url = url;          this.params = params;          this.h = h;      }        @Override      public void run() {          Message m = new Message();          m.what = 0x123;          if(op.equals("GET")){              Log.i("iiiiiii","发送GET请求");              m.obj = GetPostUtil.sendGet(url, params);              Log.i("iiiiiii",">>>>>>>>>>>>"+m.obj);          }          if(op.equals("POST")){              Log.i("iiiiiii","发送POST请求");              m.obj = GetPostUtil.sendPost(url, params);              Log.i("gggggggg",">>>>>>>>>>>>"+m.obj);          }          h.sendMessage(m);      }  }