2011-12-2

ubuntu系统root默认密码，每次开机会随机产生默认的root密码，修改的方式:
命令sudo passwd
输入、确认新密码

使用httpclient构建post请求的方法：

       String response = null; 
       HttpClient client = null;
       PostMethod method = null; 
           try
           {
               client = new HttpClient();         //初始化 HttpClient
               client.getHostConfiguration().setHost("localhost", port);
               method = new PostMethod(url);     //初始化 Http方法 POST，url中不包含参数信息，通过一下代码设置参数
               method.setParameter("name", "a");
               method.addParameter(new NameValuePair("sex","b"));
               method.addParameter(new NameValuePair("location","c"));
               method.addParameter(new NameValuePair("textarea1",new String(text.getBytes("utf-8"),"iso-8859-1")));    
//防止乱码 text为类中的静态变量，类型为String
               client.getParams().setParameter(HttpMethodParams.USER_AGENT,"Mozilla/5.0 Firefox/3.5.2");        //将程序伪装为firefox
               client.executeMethod(method);                             //执行 POST 方法
               if (method.getStatusCode() == HttpStatus.SC_OK)    {        //方法执行结果是否正常?
                   InputStream inputStream = method.getResponseBodyAsStream();   
                   BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));   
                   StringBuffer stringBuffer = new StringBuffer();   
                   String str= "";   
                   while((str = br.readLine()) != null){   
                       stringBuffer .append(str );   
                   response=stringBuffer.toString();
                }   
               }//将网页保存为String
               else if (method.getStatusCode() == 404)
                   return null;
           }
           catch (Exception e)
           {
               e.printStackTrace();
               System.out.println("===== Timed Out =====");
           }
       method.releaseConnection();

 与GET方法的区别，get方法的url，是通过method的setMethod方法设置，并且其中包含参数的传递。