Java中正则表达式的简单使用

import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.junit.Test;

public class TestRegularExp {
	@Test
	public void testSearch(){
		String str = "lingyibin";
		
		String regExp = "n*y";
		
		Pattern pattern = Pattern.compile(regExp);//,Pattern.CASE_INSENSITIVE);
		Matcher matcher = pattern.matcher(str);
		
		boolean b = matcher.find();
		System.out.println(b);
		
		System.out.println(matcher.start() + "--->" + matcher.end());
	}
	
	@Test
	public void testGetSubStr(){
		String str = "E:\\Eclipse3_6\\workspace\\Test.txt";
		
		//We'll have to use four '\' instead of one
		String regExp = ".+\\\\(.+)$";//"\\\\.+\\\\";
		
		Pattern pattern = Pattern.compile(regExp);
		Matcher matcher = pattern.matcher(str);
		
		matcher.find(); //This is could not be deleted! Or you'll get an error!
		
		int cnt = matcher.groupCount();
		for(int i = 0; i <= cnt; i ++){
			System.out.println(matcher.group(i));
		}
	}
	
	@Test
	public void testSplit(){
		String str = "ling#yi#bin";
		String regExp = "#";
		Pattern pattern = Pattern.compile(regExp);
		String[] strs = pattern.split(str);
		
		for(String s:strs){
			System.out.println(s);
		}
	}
	
	@Test
	public void testReplace(){
		String str = "lllling";
		String regExp = "l+";
		
		Pattern pattern = Pattern.compile(regExp);
		Matcher matcher = pattern.matcher(str);
		
		str = matcher.replaceAll("L");
		System.out.println(str);
	}
}