Java自定義URL匹配器

項目開發過程中，往往需要判斷一個URL是否符合特定規則，於是乎，自己定義一個類。用法參見main函數。

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class UrlMatcher
{
	private static final String TMP_PLACEHOLDER = "@@@@@#####$$$$$";
	private List<Pattern> includePatterns;
	private List<Pattern> excludePatterns;
	public UrlMatcher(String includes, String excludes)
	{
		this.includePatterns = valueToPatterns(includes);
		this.excludePatterns = valueToPatterns(excludes);
	}
	
	private List<Pattern> valueToPatterns(String value)
	{
		List<Pattern> patterns = new ArrayList<>();
		if(value == null) return patterns;
		
		String[] patternItems = value.split(",");
		for (String patternItem : patternItems)
		{
			patternItem = patternItem.trim();
			if("".equals(patternItem)) continue;
			
			patternItem = patternItem.replace("**", TMP_PLACEHOLDER);
			patternItem = patternItem.replace("*", "[^/]*?");//替換*
			patternItem = patternItem.replace(TMP_PLACEHOLDER, "**");
			patternItem = patternItem.replace("**", ".*?");//替換**
			patterns.add(Pattern.compile(patternItem));
		}
		
		return patterns;
	}
	
	public boolean matches(String url)
	{
		return matches(includePatterns, url) && !matches(excludePatterns, url);
	}
	
	private boolean matches(List<Pattern> patterns, String url)
	{
		for (Pattern pattern : patterns)
		{
			Matcher matcher = pattern.matcher(url);
			if(matcher.matches()) return true;
		}
		return false;
	}
	
	public static void main(String[] args)
	{
		UrlMatcher matcher = new UrlMatcher("/login/**,/abc/*/*", "");
		System.out.println(matcher.matches("/abc/login/get"));
	}
}