问题
I want to create an Android FTP Server App with the Apache Mina FTP Server.
The problem is the following: I can't import these libraries.
I can select between two errors:
If the libs aren't selected in "Java Build Path"/"Order and Export", I get this error:
"Could not find class 'org.apache.ftpserver.FtpServerFactory' (...)"
(Logcat)
If they are selected, I get this error:
Conversion to Dalvik format failed:
Unable to execute dex:
Multiple dex files define Lorg/apache/ftpserver/ftplet/FtpException;
(Problems / Errors)
What's wrong??
My imported libraries:
- ftplet-api-1.0.6.jar
- ftpserver-core-1.0.6.jar
- mina-core-2.0.4.jar (or 2.0.7)
- slf4j-api-1.5.2.jar (or 1.6.6)
- slf4j-simple-1.5.3.jar
回答1:
I have the same issue with any android project when I add jCenter dependency on org.apache.ftpserver:ftpserver-core:1.0.6. Project compiles successfully, but it fails when I try to start it.
I realized, that ftpserver-core-1.0.6.jar contains classes from ftplet-api-1.0.6.jar.
To fix the issue, I used local libraries, but deleted ftplet-api-1.0.6.jar. I am not sure that it is totally correct solution, but it works for me.
来源：https://stackoverflow.com/questions/23476431/java-apache-mina-ftp-server-import-libraries