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电梯直达

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发表于 2010-07-22 13:48 |只看该作者 |倒序浏览

程序运行时报如下错误，请高手们分析一下：
login state is:230
ftp login successfully!
Program changeWorkingDirectory successfully!
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/oro/text/regex/MalformedPatternException
at org.apache.commons.net.ftp.parser.DefaultFTPFileEntryParserFactory.createUnixFTPEntryParser(DefaultFTPFileEntryParserFactory.java:169)
at org.apache.commons.net.ftp.parser.DefaultFTPFileEntryParserFactory.createFileEntryParser(DefaultFTPFileEntryParserFactory.java:94)
at org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:235

at org.apache.commons.net.ftp.FTPClient.listFiles(FTPClient.java:2141)
at org.apache.commons.net.ftp.FTPClient.listFiles(FTPClient.java:218

at www.metarnet.com.getFile.main(getFile.java:55)
Caused by: java.lang.ClassNotFoundException: org.apache.oro.text.regex.MalformedPatternException
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:18

at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
... 6 more

相应的代码是：
ftp.changeWorkingDirectory(path);
System.out.println("

rogram changeWorkingDirectory successfully!"

;
      FTPFile[] fs =ftp.listFiles();
      //遍历目录下的所有文件
      for(FTPFile obj:fs){
        if(obj.getName().equals(filename)){
        File localFile =new File(System.getProperty("user.dir" + File.separator + obj.getName()));
        OutputStream os =new FileOutputStream(localFile);
        //下载文件
        ftp.retrieveFile(obj.getName(),os);
        os.close();
        }
      }