我正在使用基于Java的FTP服务器,我可以将其嵌入到另一个项目中。我使用Apache mina库作为FTP服务器。我可以启动服务器,但当我尝试连接到它时,我收到此错误:
Exception in thread "pool-1-thread-1" java. lang.IncompatibleClassChangeError
at org.apache.mina.core.filterchain.DefaultIoFilterChain.register(DefaultIoFilterChain.java:276)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.addLast(DefaultIoFilterChain.java:175)
at org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder.buildFilterChain(DefaultIoFilterChainBuilder.java:452)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.addNow(AbstractPollingIoProcessor.java:430)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.handleNewSessions(AbstractPollingIoProcessor.java:412)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$200(AbstractPollingIoProcessor.java:56)
at org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:885)
at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
我已经对错误原因做了一些阅读。 This site至少暗示它是Apache Mina代码的问题。
我使用Apache Mina核心库 v2.019 和Apache FTP库 v1.1.1 ,这两者都是我能找到的最新版本
这是我的服务器实现:
public FTPServer(final String ipadress, final int port){
FtpServerFactory serverFactory = new FtpServerFactory();
ListenerFactory listenerfactory = new ListenerFactory();
listenerfactory.setDataConnectionConfiguration(
new DataConnectionConfigurationFactory().createDataConnectionConfiguration()
);
ConnectionConfigFactory connection = new ConnectionConfigFactory();
connection.setMaxLoginFailures(10);
connection.setLoginFailureDelay(5);
connection.setAnonymousLoginEnabled(false);
// set the ip address of the listener
listenerfactory.setServerAddress(ipaddress);
// set the port of the listener
if (port == 0){
listenerfactory.setPort(PORT);
}
else {
listenerfactory.setPort(port);
// replace the default listener
serverFactory.addListener("default", listenerfactory.createListener());
serverFactory.setConnectionConfig(connection.createConnectionConfig());
}
PropertiesUserManagerFactory userManagerFactory = new
PropertiesUserManagerFactory();
userManagerFactory.setFile(new File("myusers.properties"));
userManagerFactory.setPasswordEncryptor(new SaltedPasswordEncryptor());
UserManager um = userManagerFactory.createUserManager();
BaseUser user = new BaseUser();
user.setName("test");
user.setPassword("test");
user.setHomeDirectory("");
try {
um.save(user);
} catch (FtpException e1) {
// TODO Auto-generated catch block
this.stopServer();
e1.printStackTrace();
}
serverFactory.setUserManager(um);
server = serverFactory.createServer();
//this.StartServer();
}
答案 0 :(得分:0)
我从头开始,并使用Apache示例代码创建FTP服务器。我将其粘贴在Main.java中的静态方法中,并删除了对服务器代码的引用。我无法重现我的错误。然后,我将代码的一部分复制到新的静态方法中,直到获得与原始代码相同的代码,并且无法重现原始故障。然后,我将代码还原到Main.java,并删除了对静态方法的调用。我仍然无法重现该错误。我以为这是NetBeans的问题,在几个清理和构建过程中仍然存在,但是在引入新的Apache示例代码时已解决。