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测试servlet是否可用 servlet JAVA程序里面怎么测试一个Servlet是否可用 
HttpClient httpClient = new DefaultHttpClient();
//		HttpGet get = new HttpGet("http://local:8084");
		HttpPost get = new HttpPost("http://localhost:8080");
		HttpResponse response = httpClient.execute(get);
		HttpEntity entity = response.getEntity();
		String xmlString = null;
		if (entity != null) {
			entity = new BufferedHttpEntity(entity);
			
			InputStream in = entity.getContent();
			byte[] read = new byte[1024];
			byte[] all = new byte[0];
			int num;
			while ((num = in.read(read)) > 0) {
				byte[] temp = new byte[all.length + num];
				System.arraycopy(all, 0, temp, 0, all.length);
				System.arraycopy(read, 0, temp, all.length, num);
				all = temp;
			}
			System.out.println(new String(all));
			xmlString = new String(all);
			in.close();
		}
		get.abort();
js获取系统时间 js JAVA获取系统时间 
/**
	 * 获取系统时间
	 * @return
	 */
	public String getDate(){
		
		 Calendar ca = Calendar.getInstance();
	      int year = ca.get(Calendar.YEAR);//获取年份
	      int month=ca.get(Calendar.MONTH);//获取月份 
	      int day=ca.get(Calendar.DATE);//获取日
	      int minute=ca.get(Calendar.MINUTE);//分 
	      int hour=ca.get(Calendar.HOUR);//小时 
	      int second=ca.get(Calendar.SECOND);//秒
	      
	      String date = year + "年" + (month + 1 )+ "月" + day + "日"+ hour + "时" + minute + "分" + second + "秒";


	      return date;
		
	}
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