创建向导时为其添加path，指为jar添加到path里面

@Override
protected void execute(IProgressMonitor monitor) throws CoreException,
   InvocationTargetException, InterruptedException {
  super.execute(monitor);
  try {
   // 将工程转为java工程
   IJavaProject fCurrJProject = JavaCore.create(project);
   // 获得Classpath
   IClasspathEntry[] fEntries = fCurrJProject.getRawClasspath();
   ArrayList<IClasspathEntry> newEntries = new ArrayList(
     fEntries.length + 1);
   for (int i = 0; i < fEntries.length; i++) {
    IClasspathEntry curr = fEntries;
    newEntries.add(curr);
   }
   // 将设置为源目录的文件夹
   IPath myLib1 = fCurrJProject.getProject().getFullPath().append("libs/freemarker.jar");
   IClasspathEntry myNewEntry1 = JavaCore.newLibraryEntry(myLib1, null, null, true);//这里使用的是newLibraryEntry 创建一个lib，这个会直接向.classpath写入一个lib库配置
   newEntries.add(myNewEntry1);
   
   IPath myLib2 = fCurrJProject.getProject().getFullPath().append("libs/log4j-1.2.13.jar");
   IClasspathEntry myNewEntry2 = JavaCore.newLibraryEntry(myLib2, null, null, true);//这里使用的是newLibraryEntry 创建一个lib，这个会直接向.classpath写入一个lib库配置
   newEntries.add(myNewEntry2);
   fEntries = (IClasspathEntry[]) newEntries.toArray(new IClasspathEntry[newEntries.size()]);
   // 把新的Classpath付给工程
   fCurrJProject.setRawClasspath(fEntries, new SubProgressMonitor(monitor, 2));
   
   //创建工程
   create();
  } finally {
   monitor.done();
  }
}