java小程序，用java在指定目录或以及子目录中找出同名文件，java File过滤文件名后找同名文件

主要是使用java API“java.io.File”实现

一个简单的类，copy出来，因main方法可直接运行。

package com.paic.icore.pams.auto.util;

import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

/**
 * @author White lion
 *
 */
public class FindSameFile {
    static int filterFilesCount=0,filterFileNamesCount=0;
    static List<String> filterFiles = new ArrayList<String>(),filterFileNames = new ArrayList<String>();
    static Map<String, Object> sameFileNames = new HashMap<String, Object>(),fileNames = new HashMap<String, Object>();
    static File root,aRoot,bRoot;
    
    //execue init data
    static{
        filterFileNames.add("svn-");
        filterFileNames.add("index.html");
        
        filterFiles.add(".svn");
        filterFiles.add("image");
        filterFiles.add("htmlDemo");
        
        //目录A
        aRoot = new File("E:/Software/src/webroot");
        //目录B
        bRoot = new File("D:/Software/webroot");
        
        root = new File("E:/Software/src/webroot");
    }
    
    //execue
    public static void main(String[] args) {
        long start =System.currentTimeMillis();
//        findFile(root, fileNames, null, null);
        findSameFileName(aRoot,bRoot);
        System.out.println("耗时:"+(System.currentTimeMillis()-start)+"ms，sameFileNames count:" + sameFileNames.size()+"，fileNames count:" + fileNames.size()+"，filterFilesCount:" + filterFilesCount+"，filterFileNamesCount:" + filterFileNamesCount);
    }

    public static void findSameFileName(File aRoot, File bRoot) {
        long start =System.currentTimeMillis();
        Map<String, Object> aFileNames = new HashMap<String, Object>();
        findFile(aRoot,aFileNames,filterFiles,filterFileNames);
        
        Map<String, Object> bFileNames = new HashMap<String, Object>();
        findFile(bRoot,bFileNames,filterFiles,filterFileNames);
        
        System.out.println(aRoot+" list:
"+aFileNames.keySet());
        System.out.println(bRoot+" list:
"+bFileNames.keySet());
        
        Iterator<Entry<String, Object>> iterator;
        Map<String, Object> stayFindFileNames = new HashMap<String, Object>();
        if(aFileNames.size() >= bFileNames.size()){
            iterator=aFileNames.entrySet().iterator();
            stayFindFileNames=bFileNames;
        }else{
            iterator=bFileNames.entrySet().iterator();
            stayFindFileNames=aFileNames;
        }
                
        while (iterator.hasNext()) {
            Entry<String, Object> next = iterator.next();
            String key = next.getKey();
            Object value = next.getValue();
            
            if(null!=stayFindFileNames.get(key)){
                Object stayObj = stayFindFileNames.get(key);

                if(value instanceof java.io.File){
                    File a = (File) value;
                    addFileToSameFileNamesBox(stayObj, a);
                }else if(value instanceof List){
                    List<File> list = (List<File>) value;
                    for (File f : list) {
                        addFileToSameFileNamesBox(stayObj, f);
                    }
                    
                }
                
            }
            
        }
        System.out.println("findSameFileName 耗时:"+(System.currentTimeMillis()-start)+"ms，sameFileNames count:" + sameFileNames.size()+"，sameFileNames list:
" + sameFileNames.keySet());
    }

    
    public static void findFile(File root, Map<String, Object> fileNames,List<String> filterFiles,List<String> filterFileNames) {
        if (root.exists() && root.isDirectory()) {
            for (File file : root.listFiles()) {
                if (file.isFile()) {
                    if(null!=filterFileNames){
                        int tmpFilterFileNamesCount=filterFileNamesCount;
                        for (String filter : filterFileNames) {
                            if(file.getName().indexOf(filter)>-1){
                                filterFileNamesCount++;
                                System.out.println("filter fileName1:"+file.getPath());//这里输出文件名！
                                break;
                            }
                        }
                        if(tmpFilterFileNamesCount<filterFileNamesCount) continue;
                    }
                    if(null!=fileNames.get(file.getName())){
                        Object value = fileNames.get(file.getName());
                        if(value instanceof java.io.File){
                            File b = (File) value;
                            List<File> list = new ArrayList<File>(); 
                            fileNames.put(b.getName(), list);
                            list.add(b);
                            list.add(file);
                        }else if(value instanceof List){
                            List<File> b = (List<File>) value;
                            b.add(file);
                        }
                    }else{
                        fileNames.put(file.getName(), file);
                    }
//                    System.out.println("find:"+file.getPath());//这里输出文件名！
                } else if (file.isDirectory()) {
                    if(null!=filterFiles){
                        if(filterFiles.contains(file.getName())){
                            filterFilesCount++;
                            System.out.println("filter file2:"+file.getPath());//这里输出文件名！
                            continue;
                        }
                    }
                    findFile(file, fileNames, filterFiles, filterFileNames);
                }
                
            }
        }
        
    }
    
    public static void addFileToSameFileNamesBox(File file) {
        if(null!=sameFileNames.get(file.getName())){
            Object value = sameFileNames.get(file.getName());
            if(value instanceof java.io.File){
                File b = (File) value;
                List<File> list = new ArrayList<File>(); 
                sameFileNames.put(b.getName(), list);
                list.add(b);
                list.add(file);
            }else if(value instanceof List){
                List<File> b = (List<File>) value;
                b.add(file);
            }
        }else{
            sameFileNames.put(file.getName(), file);
        }
    }
    
    public static void addFileToSameFileNamesBox(Object stayObj, File file) {
        if(stayObj instanceof java.io.File){
            File stayFile = (File) stayObj;
            if(stayFile.getName().equals(file.getName())){
                addFileToSameFileNamesBox(stayFile);
            }
        }else if(stayObj instanceof List){
            List<File> list = (List<File>) stayObj;
            for (File f : list) {
                if(f.getName().equals(file.getName())){
                    addFileToSameFileNamesBox(f);
                }
            }
        }
    }
    
}