java如何查找目录下是否有特定文件

package com.cn.leng;

import java.io.File;
import java.io.FilenameFilter;

public class ListFile {
	private  String filepre;//文件前缀
	private  String filesux;//文件后缀
	public  void listFile(String dir, String prefix, String suffix){
		File fileTarget = new File(dir);//取得目标目录
		filepre = prefix;
		filesux =suffix;
		if(fileTarget.exists()){//判断目录是否存在
			File[] fileLogs = fileTarget.listFiles(
					new FilenameFilter(){
						public boolean accept(File dir, String name) {
							return ((name.startsWith(filepre))&&(name.endsWith(filesux)));//使用FilenameFilter类过滤取得满足指定条件的文件的文件数组
						}	
					}
					);
			if(fileLogs.length > 0){
				for(int i = 0; i<fileLogs.length; i++){
					System.out.println(fileLogs[i].getName());
				}				
			}else{
				System.err.println("we cant find the file start with:" + prefix);
				System.exit(0);
			}
		}else{
			System.err.print("we cant find the path:" + fileTarget);
		    }
		
	}


	public static void main(String[] args) {
		ListFile lf = new ListFile();
		lf.listFile("C:\\swserver\\ipe113\\logs","eai","log");

	}

}

结果：

引用

eaijava.59335b28b4d45c18fffffff50006ca1c.log
eaireg.log
eairegerror.log
eaiunreg.log
eaiunregerror.log