在Servlet中删除和重命名多个文件的问题

Question

我必须删除并重命名doPost中的文件，但是在执行某些文件时删除了一些不属于的文件。当我在java中运行相同的代码时，操作成功执行。这里是我用于删除目录内文件的代码。下面的代码也是我在servlet中使用的代码。

public static void updateRootFile(String directorypath, String appID, String[] appName) throws IOException { 
    try { 

     FileInputStream fin = null; 
     File[] listOfFiles=fileLists(directorypath); 
     for (int i = 0; i < listOfFiles.length; i++) { 
      if (listOfFiles[i].isFile()) { 
       rootFiles = listOfFiles[i].getName(); 
       if (rootFiles.endsWith(".properties") || rootFiles.endsWith(".PROPERTIES")) { 
        fin = new FileInputStream(directorypath + rootFiles); 
        properties.load(new InputStreamReader(fin, Charset.forName("UTF-8"))); 
        String getAppName = properties.getProperty("root.label." + appID); 
        String propertyStr = "root.label." + appID; 
        saveFile(fin, getAppName, directorypath + rootFiles, propertyStr, appName[i]); 
       } 
      } 

     } 

    } catch (Exception e) { 
     System.out.println("expn-" + e); 

    } 

} 

public static void saveFile(FileInputStream fins, String oldAppName, String filePath, String propertyStr, String appName) 
     throws IOException { 
    String oldChar = propertyStr + "=" + oldAppName; 
    String newChar = propertyStr + "=" + appName; 
    String strLine; 
    File f1 = new File(filePath); 
    File f2 = new File("C:\\Equinox\\RootSipResource\\root\\root_created.properties");  
    BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(f1), "UTF-8")); 
    OutputStreamWriter out = new OutputStreamWriter(new FileOutputStream(f2), "UTF-8"); 
    while ((strLine = br.readLine()) != null) { 
     strLine = strLine.replace(oldChar, newChar); 
     out.write(strLine); 
     out.write("\r\n"); 
    } 
    out.flush(); 
    out.close(); 
    br.close(); 
    fins.close(); 
} 

servlet代码：

import java.io.*; 
import java.text.*; 
import java.util.*; 
import javax.servlet.*; 
import javax.servlet.http.*; 
import root.sip.RootSipResourceApp; 

public class SendRedirect extends HttpServlet { 

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 
      response.setContentType("text/html; charset=UTF-8"); 
      response.setCharacterEncoding("UTF-8"); 
     String strDirectorypath = (String) request.getParameter("txtfileBrowse"); 
     request.setAttribute("directorypath", strDirectorypath); 
     String strappID = request.getParameter("txtAppID"); 
     String[] appNames = {strEn, strAr, strBg, strCs, strDa, strDe, strEl, strEs, strFi, strFr, strHe, strHr, strHu, strIt,strLw, strJa, strKo, strNl, strNo, strPl, strPt, strRo, strRu, strSk, strSl, strSv, strTr, strZh, strZh_TW }; 

     RootSipResourceApp.updateRootFile(strDirectorypath, strappID, appNames); 
     System.out.println("after................"); 
     RequestDispatcher dispatcher = getServletContext().getRequestDispatcher("/index.jsp"); 
     dispatcher.forward(request, response); 
} 

Answer 1

这可能是因为您的静态方法是通过多线程Servlet的一次访问。

您可以使saveFile()和updateRootFile()同步以防止被多个线程加入。