public class TopicAction {

    private TopicService topicService = null;

    private Topic topic = null;
    
    private String key = null;
    
    private List<File> files;
    
    public void setTopicServoce(TopicService topicService) {
        this.topicService = topicService;
    }

    public Topic getTopic() {
        return topic;
    }

    public void setTopic(Topic topic) {
        this.topic = topic;
    }

    public String getKey() {
        return key;
    }

    public void setKey(String key) {
        this.key = key;
    }

    public List<File> getFiles() {
        return files;
    }

    public void setFiles(List<File> files) {
        this.files = files;
    }

    public TopicAction(){
         }
    
    public void post(){
    
        //HttpServletRequest request = ServletActionContext.getRequest();
        System.out.println(key);
             topicService.pubTopic(topic, files, key);
        
        
    }
    
}

                                            $.ajax({
                     url:'forum/postTopic.action',
                     type:'post',
                     data:
                                               { fid:1,author:'ljg',title:'test',content:'content',key:'ko'},
                     async :true,
                     success:function(data)
                     {        
                        if(data=='success'){
                           alert('成功！');    
                        }
                     }
                     });