[javaSE] java擷取檔案清單，javasejava

[javaSE] java擷取檔案清單，javasejava

遞迴測試

import java.io.File;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;public class FilesDemo {    private static final String FILE_PATH = "./";    private static List<Map<String, String>> FileList;    public static void main(String[] args) {        listFiles(new File(FILE_PATH), 1);        // for(Map<String,String> item:FileList){        // System.out.println("{name:"+item.get("name")+",level:"+item.get("level")+"}");        // }    }    public static void listFiles(File file, int level) {        FileList = new ArrayList<>();        Map<String, String> item;        File[] files = file.listFiles();        if (file.list().length != 0) {            for (File fileTemp : files) {                String fileName = fileTemp.getName();                System.out.println(getLevelPrefix(level) + fileName);                if (fileTemp.isDirectory() && fileTemp.list().length > 0) {                    listFiles(fileTemp, level + 1);                } else {                    item = new HashMap<String, String>();                    item.put("name", fileTemp.getName());                    item.put("level", String.valueOf(level));                    FileList.add(item);                }            }        } else {            System.out.println(getLevelPrefix(level) + file.getName());        }    }    public static String getLevelPrefix(int level) {        StringBuilder sb = new StringBuilder();        for (int i = 1; i < level; i++) {            sb.append("    ");        }        sb.append("|--");        return sb.toString();    }}