How to retrieve the value while displaying contents in JSP

问题

I am facing problem in below code

<s:form action="updateBankInfo.action" enctype="multipart/form-data" method="post"      theme="simple">
  <s:actionerror />
  <div style="font-family:Times New Roman;font-size:30px; padding-left: 250px;">Bank Info</div>


  <div>
    <div class="label"><s:text name="Payee Name*   :"/></div>
    <div class="input"><s:textfield  value="%{#session.payeeName}" name="bean.payeeName" readonly="false" /></div>
    <div><s:fielderror fieldName="bean.payeeName"/></div>
  </div>

  <div>
    <div class="label"><s:text name="Bank*   :"/></div>
    <div class="input"><s:textfield value="%{#session.bankName}" name="bean.bankName" readonly="false" /></div>
    <div><s:fielderror fieldName="bean.bankName"/></div>
  </div>

  <div>
    <div class="label"><s:text name="Branch*   :"/></div>
    <div class="input"><s:textfield  value="%{#session.bankBranch}" name="bean.bankBranch" readonly="false" /></div>
    <div><s:fielderror fieldName="bean.bankBranch"/></div>
  </div>

  <div>
    <div class="label"><s:text name="City*   :"/></div>
    <div class="input"><s:textfield  value="%{#session.city}" name="bean.city" readonly="false" /></div>
    <div><s:fielderror fieldName="bean.city"/></div>
  </div>

  <div>
    <div class="label"><s:text name="A/C No*:"/></div>
    <div class="input"><s:textfield  value="%{#session.accountNo}" name="bean.accountNo" readonly="false" /></div>
    <div><s:fielderror fieldName="bean.accountNo"/></div>
  </div>

  <div>
    <div class="label"><s:text name="IFSC Code   :"/></div>
    <div class="input"><s:textfield  value="%{#session.IFSCCode}" name="bean.IFSECode" readonly="false" /></div>
    <div><s:fielderror fieldName="bean.IFSECode"/></div>
  </div>
  <button type="submit" style="width:107px;height:34px;margin-top:100px;margin-left:10px;font-size:1.67em;background-color:#d9d9d9;clear: left;" onclick="form.submit()"><s:text name="Update"/></button>
</s:form>

In this all the values I am fetching from database and storing in sessions. For the first time bankName will not be containing any values, and I have used validator method to do validation, so if I give value for bankname and click on submit. I am not able to retain the bankName value since I have given value="%{#session.bankName}", since bankName does not contain any value. How to retrieve the value?

回答1:

Create the bean instance and getter/setter, i.e.

private Bean bean = new Bean();
public Bean getBean() { return bean; }
public void setBean(Bean bean){ this.bean = bean; }

To retain the values you should

Map session = ActionContext.getContext().getSession();
session.put("bankName", bean.getBankName());
// the same put for the others.

See the use of session in the simple example.

来源：https://stackoverflow.com/questions/18097992/how-to-retrieve-the-value-while-displaying-contents-in-jsp

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java

jsp

session

struts2

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