Struts ActionForm替空
日期：2014-05-19 浏览次数：20732 次
Struts ActionForm为空
1.2版本的struts
execute里的参数form初始化就是空的。
adopt.jsp
1.2版本的struts
execute里的参数form初始化就是空的。
- Java code
public class DoAdoptAction extends Action {
public ActionForward execute(ActionMapping mapping,ActionForm form,
HttpServletRequest request,HttpServletResponse response){
ActionForward af=null;
int num=0;
if(form==null){
System.out.println("error!");
System.out.println(request.getAttribute("PetForm"));//输出null
return null;
}
//form不知道什么原因为空了，下面都不执行了。
PetForm myForm=(PetForm)form;
PetInfo info=new PetInfo(myForm);
try{
PetInfoBiz petBiz=new PetInfoBizImpl();
num=petBiz.add(info);
}catch(Exception e){
request.setAttribute("error", "修改失败");
return mapping.findForward("error");
}
if(num>0){
try {
response.sendRedirect("/epet/ListPet.do");
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
request.setAttribute("error", "修改失败");
return mapping.findForward("error");
}
}
adopt.jsp
- HTML code
<html>
<head>
<title>领养宝贝</title>
<script language="javascript">
var validateMsg = "";
function checkNotEmpty(ctlName,label)
{
var oCtl = document.forms[0].elements[ctlName];
if (oCtl.value=="")
{
if (label)
{
validateMsg += label;
}
validateMsg += "不能为空！\n";
oCtl.focus();
}
}
function checkValidateMsg()
{
if (validateMsg!="")
{
alert(validateMsg);
return false;
}
return true;
}
function doAdopt()
{
validateMsg = "";
checkNotEmpty("petPassword","密码");
checkNotEmpty("petOwnerName","宠物主人");
checkNotEmpty("petType","类");
checkNotEmpty("petName","宠物名");
if ( !checkValidateMsg() )
{
return;
}
document.forms[0].submit();
}
function setPetType(oSelect)
{
var typeValue = oSelect.options[oSelect.selectedIndex].value;
var oStrength = document.forms[0].elements["petStrength"];
var oCute = document.forms[0].elements["petCute"];
var oLove = document.forms[0].elements["petLove"];
var oPic = document.forms[0].elements["petPic"];
var oImg = document.getElementById("petImg");
oPic.value = "images/pet/";
if (typeValue==1)//Pit
{
oStrength.value = 60;
oCute.value = 60;
oLove.value = 60;
oPic.value += "pig.jpg";
}
else if (typeValue==2)//Cat
{
oStrength.value = 40;
oCute.value = 60;
oLove.value = 80;
oPic.value += "cat.jpg";
}
else if (typeValue==3)//Dragon
{
oStrength.value = 80;
oCute.value = 60;
oLove.value = 40;
oPic.value += "dragon.jpg";
}
else{
oStrength.value = 0;
oCute.value = 0;
oLove.value = 0;
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