com/jcraft/jsch/UserInfo

Solution: “Could not load a dependent class” when using Ant through Eclipse

Problem

When running an optional Ant task (e.g. scp or sshexec ) through the Eclipse Ant interface, you get an error similar to the one below.

BUILD FAILED
C:\Path\To\build.xml:45: Problem: failed to create task or type scp
Cause: Could not load a dependent class com/jcraft/jsch/UserInfo
       It is not enough to have Ant's optional JARs
       you need the JAR files that the optional tasks depend upon.
       Ant's optional task dependencies are listed in the manual.
Action: Determine what extra JAR files are needed, and place them in one of:
        -C:\Path\To\Ant\Home\lib
        -C:\Path\To\User\Home\.ant\lib
        -a directory added on the command line with the -lib argument

Do not panic, this is a common problem.
The commonest cause is a missing JAR.

This is not a bug; it is a configuration problem

However, you have found all required dependencies for the tasks you are trying to use and put them in one of the folders as specified.

Cause

Although you have added the right dependencies, Eclipse might not yet know of the file(s). If this is the case, you can see this by running Ant diagnostics (ant -diagnostics on the command line or the <diagnostics> ant task). You will see that the dependency is listed in the appropriate “lib jar listing” but is missing in the java.class.path system property.

Solution

Go to Window > Preferences > Ant > Runtime > Classpath , select “Ant Home Entries (default)” and click “Add External JARs…”. Select the required dependency or dependencies and accept. Now, the selected JAR files will be loaded to the class path and the optional ant task depending on them will work.

评论

1 楼 dc075ya 2012-06-12  

Solution