java檔案目錄操作函數

//用於快取檔案列表
private arraylist files = new arraylist();
//用於承載檔案路徑
private string _path;
//用於承載未合并的正則公式
private string _regexp;

class myfilefilter implements filefilter {

/**
* 匹配檔案名稱
*/
public boolean accept(file file) {
try {
pattern pattern = pattern.compile(_regexp);
matcher match = pattern.matcher(file.getname());
return match.matches();
} catch (exception e) {
return true;
}
}
}

/**
* 解析輸入資料流
* @param inputs
*/
filesanalyze (string path,string regexp){
getfilename(path,regexp);
}

/**
* 分析檔案名稱並加入files
* @param input
*/
private void getfilename(string path,string regexp) {
//目錄
_path=path;
_regexp=regexp;
file directory = new file(_path);
file[] filesfile = directory.listfiles(new myfilefilter());
if (filesfile == null) return;
for (int j = 0; j < filesfile.length; j++) {
files.add(filesfile[j]);
}
return;
}

/**
* 顯示輸出資訊
* @param out
*/
public void print (printstream out) {
iterator elements = files.iterator();
while (elements.hasnext()) {
file file=(file) elements.next();
out.println(file.getpath());
}
}

public static void output(string path,string regexp) {

filesanalyze filegroup1 = new filesanalyze(path,regexp);
filegroup1.print(system.out);
}

public static void main (string[] args) {
output("c:\","[a-z|.]*");
}