java正则表达式教程

http://blog.csdn.net/yaerfeng/article/details/28855587

例子

package javastudy;

public class Test3 {
	static String s = "sdgjerj5346m456n45653m4";
	
	public static void main(String [] args){
		String a = s.replaceAll("[^0-9]", "");
		System.out.println(a);
		
		String str = "2006-04-06 02:31:04";
		StringBuffer sb = new StringBuffer();
		//\d正则表达式是非数字的意思以非数字分割字符串str，与[^0-9]等价
		String [] result = str.split("\D");
		for (int i=0;i<result.length;i++){
			System.out.println(result[i]);
			sb.append(result[i]);
		}
		System.out.println(sb.toString()) ;
		
		String b = str.replaceAll("[^0-9]", "");
		System.out.println(b); 
	}
}

　结果为

5346456456534
2006
04
06
02
31
04
20060406023104
20060406023104