遍历文件夹下各个文件，然后读出每个文件的内容，并对内容进行过滤输出

遍历文件夹下各个文件，然后读出每个文件的内容，并对内容进行过滤输出

 

在E盘的Test文件夹下有个文件

内容是：

<clientID>123456
<currentTime>20090326
<state>yes

 

package filereader; /** * 遍历文件夹下各个文件，然后读出每个文件的内容，并对内容进行过滤输出 */ import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.io.IOException; import java.util.ArrayList; public class FileList { private static ArrayList<String> filelist = new ArrayList<String>(); public static void main(String[] args) { FileList fileList = new FileList(); fileList.refreshFileList("E://Test"); //文件路径 } public void refreshFileList(String strPath) { File dir = new File(strPath); File[] files = dir.listFiles(); if (files == null) return; for (int i = 0; i < files.length; i++) { if (files[i].isDirectory()) { refreshFileList(files[i].getAbsolutePath()); } else { String strFileName = files[i].getAbsolutePath().toLowerCase(); System.out.println(strFileName); readTxt(strFileName); filelist.add(files[i].getAbsolutePath()); } } } public void readTxt(String fileName) { BufferedReader reader = null; String id = null; String state = null; String time = null; try { reader = new BufferedReader(new FileReader(fileName)); String tempString = null; while ((tempString = reader.readLine()) != null) { if (tempString.startsWith("<clientID>")) { int start = tempString.indexOf(">"); id = tempString.substring(start + 1).trim(); tempString = reader.readLine(); } if (tempString.startsWith("<currentTime>")) { int start = tempString.indexOf(">"); time = tempString.substring(start + 1).trim(); tempString = reader.readLine(); } if (tempString.startsWith("<state>")) { int start = tempString.indexOf(">"); state = tempString.substring(start + 1).trim(); } String info = id + "/n" + time + "/n" + state; System.out.println(info); return; } } catch (IOException e) { e.printStackTrace(); } finally { if (reader != null) { try { reader.close(); } catch (IOException e) { e.printStackTrace(); } } } } }