怎么使用ant打增量包呢？

要想实现打增量包要实现两个基本功能：

1.checkout 相应的svn工程

使用svnant

2.查询相应的svnlog，并根据svnlog拷贝相应的文件

使用svnkit.jar可以查询svn工程的日志。

要在ant中使用的话，可以自己实现main方法，在ant中引入

setupLibrary();

SVNRepository repository = null;
try {
  repository = SVNRepositoryFactory.create(SVNURL.parseURIEncoded(url));
} catch (Exception e) {
  e.printStackTrace();
  System.exit(1);
}
       
ISVNAuthenticationManager authManager = SVNWCUtil.createDefaultAuthenticationManager(name, password);
repository.setAuthenticationManager(authManager);
       
Collection<SVNLogEntry> logEntries = null;
try {
  logEntries = repository.log(new String[]{""}, null, revision, revision, true, true);
} catch (Exception e) {
  System.out.println("error while collecting log information for '"
                  + url + "': " + e.getMessage());
      System.exit(1);
}
       
for(Iterator<SVNLogEntry> entries = logEntries.iterator(); entries.hasNext();){
  SVNLogEntry logEntry = (SVNLogEntry)entries.next();
  System.out.println("---------------------------------------------");
  System.out.println("revision: " + logEntry.getRevision());
  System.out.println("author: " + logEntry.getAuthor());
  System.out.println("date: " + logEntry.getDate());
  System.out.println("log message: " + logEntry.getMessage());
  if(logEntry.getChangedPaths().size()>0){
      System.out.println();
              System.out.println("changed paths:");
               
              Set changedPathSet = logEntry.getChangedPaths().keySet();
              SVNLogEntryPath entryPath = null;
              for(Iterator changedPaths = changedPathSet.iterator(); changedPaths.hasNext();){
                  entryPath = (SVNLogEntryPath)logEntry.getChangedPaths().get(changedPaths.next());
                  System.out.println(" "
                          + entryPath.getType()
                          + " "
                          + entryPath.getPath()
                          + ((entryPath.getCopyPath() != null) ? " (from "
                                  + entryPath.getCopyPath() + " revision "
                                  + entryPath.getCopyRevision() + ")" : ""));
                  //TODO 这里可以实现根据log拷贝相应的文件
              }
          }
      }

private static void setupLibrary(){
        DAVRepositoryFactory.setup();
        SVNRepositoryFactoryImpl.setup();
 FSRepositoryFactory.setup();
    }

根据log拷贝文件需要根据你工程的结构来处理