hibernate和struts前辈老帮我解决下问题。

[awt_boy]

在显示页面里的“删除”这个超链接是根据页面传进来的ID去删除数据库对应的数据的
错误如下：
javax.servlet.ServletException: java.lang.IllegalArgumentException: id to load is required for loading
org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:523)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:421)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
bug.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:89)


root cause

java.lang.IllegalArgumentException: id to load is required for loading
org.hibernate.event.LoadEvent. <init>(LoadEvent.java:51)
org.hibernate.event.LoadEvent. <init>(LoadEvent.java:33)
org.hibernate.impl.SessionImpl.load(SessionImpl.java:778)
org.hibernate.impl.SessionImpl.load(SessionImpl.java:774)
bug.dao.imp.BugDAOImp.deleteBugByID(BugDAOImp.java:39)
bug.web.struts.action.DeleteBug.execute(DeleteBug.java:50)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
bug.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter

据说这个是表单里面没有把参数传过来的错误
我是在一个显示页面里指向一个请求处理的，然后请求处理取得数据库的内容并返回显示页面，处理的部分程序如下：

public void listpage(HttpServletRequest request, JspWriter out, int page)
            throws Exception {

        String id = "", sta = "", pha = "", cat = "";
        bugDao = this.getBugDAO();
        List list = bugDao.getBug();
        if (list == null) {
            out.print("暂无信息");
            return;
            
        }
        int total = list.size();
        int count = 0;
                //取得list迭代器
        Iterator it = list.iterator();
        Bug bug;
        
        while (count < (page - 1) * 10 && it.hasNext()) {
            it.next();
            count++;
        }
        
        count = 0;
        
        while (it.hasNext() && count < 10) {
            bug = (Bug) it.next();

            id = bug.getId();
            sta = bug.getSta();
            pha = bug.getPha();
            cat = bug.getCat();
            if (sta == null || sta.equals(""))
                sta = "无";
            if (pha == null || pha.equals(""))
                pha = "无";
            if (cat == null || cat.equals(""))
                cat = "无";

            out.print("<tr><td><a href=list.do?id=" + id + ">"+id+"</a></td><td>" + sta + "</td><td>"
                    + pha + "</td><td>" + cat + "</td><td>");
            out.print("<a href=DeleteBug.do?id="
                    + bug.getId() + ">删除</a></td><td>");
            count++;
        }

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
DAO的删除方法如下

public boolean deleteBugByID(String id) {
        try {
            Session s = HibernateUtil.currentSession();
            //HibernateUtil.beginTransaction();
            Bug bug=new Bug();
            bug= (Bug) s.load(Bug.class, bug.getId());
            HibernateUtil.commitTransaction();
            
    System.out.println(bug.getId());
            HibernateUtil.beginTransaction();
            s.delete(bug);
            HibernateUtil.commitTransaction();
            HibernateUtil.closeSession();
            return true;
        } catch (HibernateException e) {
            log.fatal(e);
        }        
        return false;
    }

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Action如下：

public class DeleteBug extends Action {


    private BugDAO bugDao;

    public BugDAO getBugDAO() {
        return DAOFactory.getInstance().createBugDAO();
    }

    /**
     * Method execute
     * 
     * @param mapping
     * @param form
     * @param request
     * @param response
     * @return ActionForward
     */
    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response) {

//        ActionMessages errors = new ActionMessages();
        
        String id =request.getParameter("id");
        
        bugDao = this.getBugDAO();
        
        if(!bugDao.deleteBugByID(id)){
            return (mapping.getInputForward());
        }    
        
        return (mapping.findForward("deleteBugSuccess"));
    }

}

[xlongbuilder]

到底传过来么
你打印出来看看啊

[wangjianailn]

问题不是你的参数传递有问题吗？
你贴的上面2段基本没意义，你把String id =request.getParameter("id");
打出来看看是什么值，是不是为空？
你用struts，没用actionform吗？
这个ID是不是hidden传过来的？
说的太不清楚了。。。