Java过滤文件名

Java通过实现FilenameFileter接口实现对文件名的过滤：

package file.filter;

import java.io.File;
import java.io.FilenameFilter;
import java.util.Arrays;
import java.util.regex.Pattern;

public class DirList {
    public static void main(String[] args) {
        File path = new File(DirList.class.getResource(".").getPath());
        // 只显示以.class结尾的文件
        String regex = ".*(.class)";
        String[] list = path.list(new DirFilter(regex));
        
        Arrays.sort(list, String.CASE_INSENSITIVE_ORDER);
        
        for (String file : list) {
            System.out.println(file);
        }
    }
}


/**
 * 实现FilenameFilter接口的类,实现一个通过正则表达式过滤文件
 * @author shelter
 *
 */
class DirFilter implements FilenameFilter {
    private Pattern pattern;
    
    public DirFilter(String regex) {
        pattern = Pattern.compile(regex);
    }
    
    @Override
    public boolean accept(File dir, String name) {
        return pattern.matcher(name).matches();
    }
}