Struts logic标签及增删改查
-------------------------------------------------老师写的 Acion--------------------------------
?
public ActionForward execute(ActionMapping mapping, ActionForm form,
???HttpServletRequest request, HttpServletResponse response)
???throws Exception {
??String type = request.getParameter("type");
??ActionForward actionForward = null;
??if ("insert".equals(type)) {
???actionForward = insert(mapping, form, request, response);
??} else if ("delete".equals(type)) {
???actionForward = delete(mapping, form, request, response);
??}else if ("queryAll".equals(type)) {
???actionForward = queryAll(mapping, form, request, response);
??}
??
??return actionForward;
?}
?
-------------------------------
?public ActionForward insert(ActionMapping mapping, ActionForm form,
???HttpServletRequest request, HttpServletResponse response)
???throws Exception {
??// 获取表单中的值 插入到数据库中
??UserForm userForm = (UserForm) form;
??UserModel userModel = new UserModel();
??userModel.insertUser(userForm);
??return mapping.findForward("query");
?}
?public ActionForward delete(ActionMapping mapping, ActionForm form,
???HttpServletRequest request, HttpServletResponse response)
???throws Exception {
??UserModel userModel = new UserModel();
??int id = Integer.parseInt(request.getParameter("id"));
??userModel.deleteUser(id);
??return mapping.findForward("query");
?}
?public ActionForward queryAll(ActionMapping mapping, ActionForm form,
???HttpServletRequest request, HttpServletResponse response)
???throws Exception {
??UserModel userModel = new UserModel();
??List list=userModel.queryAll();
??request.setAttribute("LIST",list);
??
??return mapping.findForward("list");
?}
?
?
-------------------------------------------------
Action里写的
??UserModel userModel = new UserModel();
??List list=userModel.queryAll();
??request.setAttribute("LIST",list);
-------------------------------------------Select.jsp-----------------------------
<logic:iterator id="U" name="list">? name就是request.getAtribute的名字
直接使用就不用
<bean:write name="U" property="id">
<bean:write name="U" property="username">
<bean:write name="U" property="password">
</logic:iterator>
--------------------
<beanLwrite? name="" property="">
name 就是 要打印的对象或是得到的setAtribute("s",s)中的"s" 而property是对象中的属性
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Ps:今天老师讲的有点乱..
?查询的时候需要新增加个 Aciton
<action path="/userQueryAll" type="net.dbet.struts.action.UserAction">
而 删除的时候又 增加个 Action
<action path="/userDelete" type="net.dbet.struts.action.UserAction">
但是? 我问 老师说 可以 把 删除的 和 查询的放到一起....? 如果有验证 就会报错..
?真是愁人? 不知道有没有什么办法 可以 把 validate? 固定再 想用的地方 .... 无语
