java 工具类（时间格式字符串截取年月）

	public String getYear(String content) { 
		String year = null; 
		if(content!=null){ 
			//正则表达式 
			String pat = "\\d{4}-\\d{2}-\\d{2} \\d{2}:\\d{2}:\\d{2}"; 
			Pattern pattern = Pattern.compile(pat) ;      // 实例化Pattern类 
		        Matcher m = pattern.matcher(content) ;    // 实例化Matcher类 
		        if(m.matches()){        				  // 进行验证的匹配，使用正则 
		        	SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 
					Date date = null; 
					try { 
						date = format.parse(content); 
						Calendar   cal   =   Calendar.getInstance();    
						cal.setTime(date);  
						year=""+cal.get(Calendar.YEAR); 
					} catch (ParseException e) { 
						e.printStackTrace(); 
					} 
		        } 
		 
		} 
		 
		return year; 
	}	 
	public String getMonth(String content){ 
		String month=null; 
		if(content!=null){ 
			//正则表达式 
			String pat = "\\d{4}-\\d{2}-\\d{2} \\d{2}:\\d{2}:\\d{2}"; 
			Pattern pattern = Pattern.compile(pat) ;      // 实例化Pattern类 
		        Matcher m = pattern.matcher(content) ;    // 实例化Matcher类 
		        if(m.matches()){        				  // 进行验证的匹配，使用正则 
		        	SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 
					Date date = null; 
					try { 
						date = format.parse(content); 
						Calendar   cal   =   Calendar.getInstance();    
						cal.setTime(date);  
						int num=cal.get(Calendar.MONTH)+1; 
						month=""+num; 
					} catch (ParseException e) { 
						e.printStackTrace(); 
					} 
		        } 
		 
		} 
		 
		return month; 
	} 
	 
	public static void main(String[] args){ 
		KmsMultidocKnowledgeIntegralStatisticsServiceImpl test=new KmsMultidocKnowledgeIntegralStatisticsServiceImpl(); 
		System.out.println("month is："+test.getMonth("2015-08-03 10:44:15")); 
		System.out.println("year is："+test.getYear("2015-08-03 10:44:15")); 
	}