Question

我有一个程序，当前正在读取文件，查找关键字，并输出关键字的出现次数。我需要编写一个读取所有文件的函数，我需要在一个点中插入这个函数，以便显示总出现次数。

我目前正在阅读1个这样的文件

try (BufferedReader br = new BufferedReader(new FileReader("C:\\P4logs\\out.log.2012-12-26")))
    {

Answer 1

您需要获取文件夹路径，然后循环浏览该文件夹中的所有文件，并检查过滤掉您不想要的文件。

File path = new File(path); //path to your folder. eg. C:\\P4logs
for(File f: path.listFiles()) { // this loops through all the files + directories
    if(f.isFile()) { // checks if it is a file, not a directory.
                     // most basic check. more checks will have to be added if 
                     // you have other files you don't want read. (like non log files)
        try (BufferedReader br = new BufferedReader(new FileReader(f.getAbsolutePath()))) { 
        // gets the full path of a file. so "C:\\P4logs\\out.log.2012-12-26"
            //do stuff
        }
    }
}

Answer 2

很简单：

File folder = new File("C:/path_to_your_folder/");

for (File file : folder.listFiles()) {
  // Got a file. Do what you want.
}

Answer 3

您需要一个递归搜索的递归函数

void readAllFiles(final File myFile) {
  if(file.isFile()) {
    //read the file and whatever
    return;
  }
  for(final File childFile : myFile.listFiles()) {
    readAllFiles(childFile);
  }
}

java函数读取文件的文件夹

3 个答案: