jquery.validationEngine+ajax验证

利用jquery.validationEngine ajax验证后台id是否已存在

前台jquery validation框架验证

jsp:

<link rel="stylesheet" type="text/css" href="<%=path%>/js/css/validationEngine.jquery.css"/>
<script type="text/javascript" src="<%=path%>/js/jquery/jquery-1.4.2.min.js"></script>
<script type="text/javascript" src="<%=path%>/js/validation/jquery.validationEngine-cn.js"></script>
<script type="text/javascript" src="<%=path%>/js/validation/jquery.validationEngine.js"></script>
 <input  type="text" name="item.entry" id="item_entry" class="validate[required,custom[onlyNumber],ajax[ajaxItemNoCall],length[0,4]] text-input" size="10"/></td>

jquery.validationEngine-cn.js

"ajaxItemNoCall": {
                  "url": "validateItemNo",
            "alertText": "* ID已被使用",
            "alertTextOk": "*ID可以使用",
            "alertTextLoad": "* 检查中, 请稍候..."
              }

ItemAction.java

@Action(results = {@Result(type="json")}, params = { "excludeProperties", "validateReturn"}, value="validateItemNo")
  public String validateItemNo() throws Exception{
    ActionContext ct = ActionContext.getContext();
    HttpServletRequest request= 
    String validateId = request.getParameter("fieldId");
    String validateValue = request.getParameter("fieldValue");
    int valiValue = Integer.parseInt(validateValue);

      item = itemService.findItemById(valiValue);
        if(item.getEntry() != valiValue){
          validateReturn[0] = validateId;
          validateReturn[1] = true;
          validateReturn[2] = "可以使用";
        }else {
          validateReturn[0] = validateId;
          validateReturn[1] = false;
          validateReturn[2] = "在指定ID已经存在";
        }
    return "success";
  }