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:\n"+aFileNames.keySet());
         System.out.println(bRoot+" list:\n"+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:\n" + 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);
                 }
             }
         }
     }

 }