JAVA和C实现文件搜索（递归和文件过滤器）

清疚 2022-06-13 00:46 170阅读 0赞

public static void findFile(File allList,String endName,List<File> filenames){      
    	         FileFilter filefilter = new ExtensionFileFilter(endName);
    	         // 创建fileArray名字的数组  ，存储allList目录下的所有文件 
    	         File[] fileArray= allList.listFiles();    
    	         // 如果传进来一个以文件作为对象的allList 返回  
    	         if(null==fileArray){    
    	              return ;    
    	          }  
    	         File[] files = null;
    	        if((allList.getAbsolutePath().indexOf("sd")!=-1)||(allList.getAbsolutePath().indexOf("SD")!=-1))
    	        {
    	        	files = allList.listFiles(filefilter);
    	        	if(files.length>0)
    	        	{
    	        		System.out.println("目录: "+files[0].getAbsolutePath()); 
    	        		filenames.add(files[0]);//找到所搜索文件，添加到存储器
    	        	}	        		
    	        }
    	     
    	         // 偏历目录下的文件   
    	         for(int i=0;i<fileArray.length;i++){    
    	            // 如果是个目录   
    	             if(fileArray[i].isDirectory()){    
    	            	 String dir = fileArray[i].getAbsolutePath();
    	                 if(dir.length() - dir.replaceAll("/", "").length() > 3)
    	                	  break;
    	            	 findFile(fileArray[i].getAbsoluteFile(),endName,filenames);   //递归 
    	              }
    	         }
    	         } 
        public static class ExtensionFileFilter implements FileFilter {
        	private String extension;
        	public ExtensionFileFilter(String extension) 
        	{
        		this.extension = extension;
        	}
          
        	public boolean accept(File file) 
        	{
        		if(file.isDirectory( ))
        		{
        			return false;
        		}
        	
        	String name = file.getName();// find the last
        	return name.equals(extension);//搜索特定名称的文件
        	
        	/*int index = name.lastIndexOf(".");//搜索特定后缀名文件
        	if(index == -1) {
        		return false;
        	}else 
        		if(index == name.length( ) -1) 
        		{
        			return false;
        		} 
        		else 
        		{
        			return this.extension.equals(name.substring(index+1));
        		}*/
        	}
        } 
        public static void getpath(){
        	String dir = "/";
        	File file = new File(dir); 
        	List<File> filenames = new ArrayList<File>();
        	findFile(file,"hello_sd.key",filenames);
        //	File[] files = (File[]) filenames.toArray();
        	System.out.println("file:="+filenames.get(0));//打印搜索文件，filenames中存储找到的文件信息
        }

需求一改，立马就得变换程序，orz，下面是用C实现搜索，无奈还是很笨啊

void  FindFile(const char *dirName,char* desFileName, char* desPath)
    {
        DIR* dir = NULL;
        struct dirent *d_ent = NULL;
        struct stat sb;
    	char currfile[1024]={0};
        dir = (DIR*)opendir(dirName);
        if(dir == NULL)
            return;
        int i;
        while ( (d_ent = readdir(dir))!= NULL )
           {
               if(strncmp(d_ent->d_name, ".", 1)==0 || strncmp(d_ent -> d_name,"",1) == 0)
                   continue;
               sprintf(currfile,"%s/%s",dirName,d_ent->d_name);
            //   LOGI("currfile=%s",currfile);
          //     LOGI("d_ent->d_name = %s, desFileName = %s",d_ent->d_name,desFileName);
               stat(currfile, &sb);
          //     LOGI("sb.st_nlink = %d",sb.st_nlink);
               if(S_ISDIR(sb.st_mode))//如果是目录文件，递归调用
               {
            	  // LOGI("This is dir");
            	   if(sb.st_nlink>=6)
            		   continue;
            	   FindFile(currfile,desFileName,desPath);
               }else if(strcmp(desFileName,d_ent->d_name) == 0)//是普通文件，比较是否是目标文件
               {
                   LOGI("desPath = %s",dirName);
                   strncpy(desPath,dirName,strlen(dirName) + 1);
                   break;
               }
          }
        closedir(dir);
    }