org.apache.commons.net.ftp.FTPClient 在netbeans上的错误分析

org.apache.commons.net.ftp.FTPClient 在netbeans下的异常分析
无论在netbeans GUI下怎么连接都是报这个异常，搞了4个小时，受伤了....

java.net.SocketException: Malformed reply from SOCKS server        at java.net.SocksSocketImpl.readSocksReply(SocksSocketImpl.java:90)        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:429)        at java.net.Socket.connect(Socket.java:529)        at java.net.Socket.connect(Socket.java:478)        at java.net.Socket.<init>(Socket.java:375)        at java.net.Socket.<init>(Socket.java:189)        at org.apache.commons.net.DefaultSocketFactory.createSocket(DefaultSocketFactory.java:53)        at org.apache.commons.net.SocketClient.connect(SocketClient.java:162)        at autodeploy.ftp.FtpUtil.login(FtpUtil.java:52)        at autodeploy.AutoDeployView$AutoDeployTask.doInBackground(AutoDeployView.java:356)        at org.jdesktop.swingworker.SwingWorker$1.call(Unknown Source)        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)        at java.util.concurrent.FutureTask.run(FutureTask.java:138)        at org.jdesktop.swingworker.SwingWorker.run(Unknown Source)        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)        at java.lang.Thread.run(Thread.java:619)

最后终于找打“伟*哥”的一篇文章，才闹明白原来NetBeans Swing Application Framework 的 org.jdesktop.application.Application.create() 调用了
System.setProperty("java.net.useSystemProxies", "true"); 太感谢“伟*哥”了，在适当的位置 写入

System.setProperty("java.net.useSystemProxies", "false"); 

程序调试成功！

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