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java程式設定文件權限setPosixFilePermissions都在報錯，不知道那邊出了問題

java setposixfilepermissions
jbuduoo 2021-06-27 16:33:24 ‧ 1148 瀏覽

log檔顯示在153行的時後報錯，但一直找不到錯誤。只知道錯誤在setPosixFilePermissions這一行。
系統是在linux中執行的。
檔案的路徑為/opt/ops/web/webapps/ROOT/attachment/1624602442378/key4_lic
希望大家能給點方向。

找到的答案：
OutputStream out = Files.newOutputStream(file);往上移就行了。
OutputStream 會產生一個空檔案，那時就有路徑了。

log檔

2021-06-26 08:54:53 ERROR FileUpload2:150 - file: /opt/ops/web/webapps/ROOT/attachment/1624602442378/key4_lic
2021-06-26 08:54:53 ERROR FileUpload2:151 - perms: [OTHERS_READ, OWNER_READ, OWNER_WRITE, GROUP_WRITE, GROUP_READ]
2021-06-26 08:54:53 ERROR FileUpload2:183 - STATUS: Failure(/opt/ops/web/webapps/ROOT/attachment/1624602442378/key4_licjava.nio.file.NoSuchFileException:
 /opt/ops/web/webapps/ROOT/attachment/1624602442378/key4_lic
	at sun.nio.fs.UnixException.translateToIOException(UnixException.java:86)
	at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)
	at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107)
	at sun.nio.fs.UnixFileAttributeViews$Posix.setMode(UnixFileAttributeViews.java:238)
	at sun.nio.fs.UnixFileAttributeViews$Posix.setPermissions(UnixFileAttributeViews.java:260)
	at java.nio.file.Files.setPosixFilePermissions(Files.java:2045)
	at ops.servlet.FileUpload2.doGet(FileUpload2.java:153)
	at ops.servlet.FileUpload2.doPost(FileUpload2.java:209)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:860)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1598)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)

完整程式

package ops.servlet;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.PosixFilePermission;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.Map.Entry;
import java.util.Properties;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.tomcat.util.http.fileupload.FileItem;
import org.apache.tomcat.util.http.fileupload.FileItemFactory;
import org.apache.tomcat.util.http.fileupload.disk.DiskFileItemFactory;
import org.apache.tomcat.util.http.fileupload.servlet.ServletFileUpload;

import ops.service.OPSService;
import system.common.Configurator;
import system.db.UserlogSQL;
import system.db.bean.UserBean;

import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;

/**
 * 處理上傳檔案(目前用在公告附件)
 */
public class FileUpload2 extends HttpServlet {
	private static final long serialVersionUID = -7215302089706068618L;
	
    private static final Logger logger = Logger.getLogger(FileUpload2.class); 
    
	public static final String lock = "lock";

	// Initialize global variables
	public void init() throws ServletException {
	}

	// Process the HTTP Get request
	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		synchronized (lock) {
			String status = "Failure";
			String clientIP = request.getRemoteAddr();
			UserBean userBean = null;
			HttpSession httpsession = request.getSession(false);
			
			//log4j
			Properties props = new Properties();
			
			props.put("log4j.rootLogger", "error, consoleout, fileout");
			props.put("log4j.appender.consoleout", "org.apache.log4j.ConsoleAppender");
			props.put("log4j.appender.consoleout.layout", "org.apache.log4j.PatternLayout");		
			props.put("log4j.appender.fileout", "org.apache.log4j.RollingFileAppender");
			props.put("log4j.appender.fileout.MaxFileSize", "5MB");
			props.put("log4j.appender.fileout.MaxBackupIndex", "10");
			props.put("log4j.appender.fileout.layout", "org.apache.log4j.PatternLayout");
			props.put("log4j.appender.fileout.layout.ConversionPattern", "%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n");
			if(Configurator.osType > 0) {
				props.put("log4j.appender.fileout.File", "/opt/ops/web/logs/FileUpload2.log");
			}else {
				props.put("log4j.appender.fileout.File", "d:/testlogs/myapp.log");
			}	
			
	        //傳入log4j.properties路徑		
			PropertyConfigurator.configure(props);
			
			if (httpsession != null) {
				userBean = (UserBean) httpsession.getAttribute("userBean");
			}
			if (userBean != null) {
				FileItemFactory factory = new DiskFileItemFactory();
				ServletFileUpload upload = new ServletFileUpload(factory);
				upload.setHeaderEncoding("utf-8");
				Path delFile = null;
				try {
					// FileItemIterator items1 =
					// upload.getItemIterator(request);
					// System.out.println(items1.hasNext());
					Iterator<Entry<String, List<FileItem>>> iter = upload.parseParameterMap(request).entrySet()
							.iterator();
					while (iter.hasNext()) {
						Entry<String, List<FileItem>> entry = iter.next();
						List<FileItem> items = entry.getValue();
						for (int i = 0; i < items.size(); i++) {
							FileItem fi = items.get(i);
							logger.error("fi: "+fi.toString());
//							System.out.println(entry.getKey() + " " + fi.isFormField() + " " + fi.getName() + " "
//									+ fi.getFieldName());
							// }
							// }
							//
							// List<FileItem> items = upload
							// .parseRequest((RequestContext) request);
							// Iterator<FileItem> iter = items.iterator();
							// while (iter.hasNext()) {
							// FileItem fi = (FileItem) iter.next();
							if (!fi.isFormField()) {
								String fieldName = fi.getFieldName();
								Path file = null;
								String item = null;
//								System.out.println("FileUpload="+fieldName);
								if (fieldName.startsWith("ann_")) {
									item = "menu.Announcement";
									String[] lang = fieldName.split("_");
									if (lang.length == 2) {
										String strPath=OPSService.attPath.replace("\\\\","\\");
										file = Paths.get(strPath + lang[1]+File.separator+fi.getName());
										delFile = file.getParent();
										if (Files.exists(delFile)) {
											File dir = delFile.toFile();
										    File[] list = dir.listFiles();
										    for(int j=0;j<list.length;j++){
										    	list[j].delete();
										    }
										    dir.delete();
										}
										Files.createDirectory(delFile);
									}
								}
								
								if (file != null) {
									if (Configurator.osType > 0) {
										Set<PosixFilePermission> perms;
										perms = new HashSet<PosixFilePermission>();
										// add owners permission
										perms.add(PosixFilePermission.OWNER_READ);
										perms.add(PosixFilePermission.OWNER_WRITE);
										perms.add(PosixFilePermission.GROUP_READ);
										perms.add(PosixFilePermission.GROUP_WRITE);
										perms.add(PosixFilePermission.OTHERS_READ);
										logger.error("file: "+file);
										logger.error("perms: "+perms.toString());
										Files.setPosixFilePermissions(file, perms);
									}
									OutputStream out = Files.newOutputStream(file);
									byte[] data = new byte[1000000];
									InputStream in = fi.getInputStream();
									int readCount = 0;
									while ((readCount = in.read(data)) > 0) {
										// System.out.println("readCount=" +
										// readCount);
										out.write(data, 0, readCount);
									}
									in.close();
									out.close();
									fi.delete();
									status = "Success";
								}
								UserlogSQL.saveLog(userBean.userName, clientIP, item, "Import", status,
										"filename="+fi.getName());
								logger.error("STATUS: "+status);
							}
							fi.delete();
						}
					}
				} catch (Exception e) {
					//將整個軌跡轉成文字檔，在LOG顯示。
					Writer writer = new StringWriter();
					e.printStackTrace(new PrintWriter(writer));
					String printStackTrace = writer.toString();
					status = status + "(" + e.getMessage() + printStackTrace+  ")";
					
			        logger.error("STATUS: "+status);    //debug層級
					System.out.println("status:"+status);
					if(delFile!=null){
						if(Files.isDirectory(delFile)){
							File dir = delFile.toFile();
						    File[] list = dir.listFiles();
						    for(int j=0;j<list.length;j++){
						    	list[j].delete();
						    }
						    dir.delete();
						}
						System.out.println("delFile:"+delFile);
						//Files.delete(delFile);
						Files.deleteIfExists(delFile);
					}
				}
				
				response.getWriter().print(status);
			}else {
				request.getRequestDispatcher("login.jsp").forward(request, response);
			}
		}
	}
Luke iT邦研究生 5 級 ‧ 2021-06-28 08:23:59 檢舉
java.nio.file.NoSuchFileException

程式抓不到檔案，
1. 程式沒有權限開
2. 這個檔案，這再被其他程式開啟中，無法讀取
3. 路徑不對，

/opt/ops/web/webapps/ROOT/attachment/1624602442378/key4_lic
jbuduoo iT邦新手 4 級 ‧ 2021-06-28 11:15:53 檢舉
OutputStream out = Files.newOutputStream(file); 往上移就行了
jbuduoo iT邦新手 4 級 ‧ 2021-06-28 11:18:18 檢舉
謝謝
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1 個回答

0
海綿寶寶
iT邦大神 1 級 ‧ 2021-06-27 16:49:05
最佳解答

錯誤訊息裡有NoSuchFileException:/opt/ops/web/webapps/ROOT/attachment/1624602442378/key4_lic
會不會是沒有 key4_lic 這個檔案？

jbuduoo iT邦新手 4 級 ‧ 2021-06-27 18:06:48 檢舉

有這個檔案

jbuduoo iT邦新手 4 級 ‧ 2021-06-28 11:18:26 檢舉

謝謝

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