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; oPic.value += "unkown.jpg"; } oImg.src = oPic.value; } </script> </head> <body> <form action="DoAdopt.do"> <input type="hidden" name="petPic" /> <div class="main_div"> <table> <tr> <td width="320px" valign="top"> <table class="input_table" width="100%"> <tr><th>宠物名：</th><td><input type="text" name="petName" /></td></tr> <tr><th>类：</th><td> <select name="petType" onchange="javascript:setPetType(this);"> <option value="">请选择...</option> <option value="1">千禧猪</option> <option value="2">喵咪</option> <option value="3">哥斯拉</option> </select> </td></tr> <tr><th>性别：</th><td> <input type="radio" name="petSex" value="男" />男 <input type="radio" name="petSex" value="女" />女 <input type="radio" name="petSex" value="小" />小 </td></tr> <tr><th>力量：</th><td><input type="text" name="petStrength" readonly="true" /></td></tr> <tr><th>能力：</th><td><input type="text" name="petCute" readonly="true" /></td></tr> <tr><th>爱心：</th><td><input type="text" name="petLove" readonly="true" /></td></tr> <tr><th>介绍：</th><td><textarea name="petIntro"></textarea></td></tr> <tr><th>主人名：</th><td><input type="text" name="petOwnerName" /></td></tr> <tr><th>宠物EMail：</th><td><input type="text" name="petOwnerEmail" /></td></tr> <tr><th>密码：</th><td><input type="password" name="petPassword" /></td></tr> <tr><th> </th><td><button onclick="javascript:doAdopt();">领养</button></td></tr> </table> </td> <td valign="top"> <img id="petImg" src="images/pet/unkown.jpg" /> </td> </tr> </table> </div> </html:form> </body></html>