Java Iterate directory to find files and edit_java iterate a file-优快云博客

本文介绍了一个简单的程序，用于递归搜索指定目录及其子目录下的所有XML文件，并对这些文件进行特定模式的批量修改。

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After mannually modified about 100 pages, I'm tired of doing that. So it's better to write a small program to deal with those thing.

1. We need to find those files which we need to modify in different directories. My example is to match all .xml file.

public static void searchFile(String sDir) {
		File[] faFiles = new File(sDir).listFiles();
		for (File file : faFiles) {
			if (file.getName().matches("^(.*xml)")) {
				System.out.println(file.getAbsolutePath());
				editFile(file.getAbsolutePath()); //Call another function
			}
			if (file.isDirectory()) {
				searchFile(file.getAbsolutePath());
			}
		}
}

2. Modify the file as we want.

public static void editFile(String fileName) {
		File f = new File(fileName);

		FileInputStream fs = null;
		InputStreamReader in = null;
		BufferedReader br = null;

		StringBuffer sb = new StringBuffer();

		String textinLine;

		try {
			fs = new FileInputStream(f);
			in = new InputStreamReader(fs);
			br = new BufferedReader(in);

			while (true) {
				textinLine = br.readLine();

				if (textinLine == null)
					break;

				if (textinLine.endsWith("</__uuid>")) { //Condition to modify file
					textinLine = "<__uuid></__uuid>";
				}

				System.out.println(textinLine);
				sb.append(textinLine + "\r\n");
			}

			fs.close();
			in.close();
			br.close();

		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
                /*Write the file back*/
		try {
			FileWriter fstream = new FileWriter(f);
			BufferedWriter outobj = new BufferedWriter(fstream);
			outobj.write(sb.toString());
			outobj.close();

		} catch (Exception e) {
			System.err.println("Error: " + e.getMessage());
		}
	}

3. In your main method, call searchFile method.

public static void main(String[] args) {
		searchFile("your file directory!");
}