English 中文(简体)
array as hidden variable
原标题:

can array be used as hidden variable on jsp.....like I have a form i.e a simple java class,I want it to be as hidden variable can I do it..

Thanks in advance

最佳回答

HTTP request parameters can only be strings. So you either have to convert it to a single string (maybe a commaseparated string?), but you need to convert it back yourself, or you have to use multiple hidden input values (all with the same name), which is generally a much better solution. In plain JSP/Servlet you can get them back using HttpServletRequest#getParameterValues() and Struts is smart enough to see that.

<logic:iterate id="foo" name="bean" property="arrayOrList">  
    <html:hidden name="paramName" property="propertyName" indexed="true" />  
</logic:iterate>  
问题回答

just write multiple hidden elements with the same name en different values. struts will see that it is supposed to be an array

agree with BalusC in addition to that you can try following

adding [] at the end of the name , keeping name and property same and adding multiple values. for example

<html:hidden name="name1[]" property="status" value="value1" />
<html:hidden name="name1[]" property="status" value="value2" />
<html:hidden name="name1[]" property="status" value="value3" />




相关问题
Spring Properties File

Hi have this j2ee web application developed using spring framework. I have a problem with rendering mnessages in nihongo characters from the properties file. I tried converting the file to ascii using ...

Logging a global ID in multiple components

I have a system which contains multiple applications connected together using JMS and Spring Integration. Messages get sent along a chain of applications. [App A] -> [App B] -> [App C] We set a ...

Java Library Size

If I m given two Java Libraries in Jar format, 1 having no bells and whistles, and the other having lots of them that will mostly go unused.... my question is: How will the larger, mostly unused ...

How to get the Array Class for a given Class in Java?

I have a Class variable that holds a certain type and I need to get a variable that holds the corresponding array class. The best I could come up with is this: Class arrayOfFooClass = java.lang....

SQLite , Derby vs file system

I m working on a Java desktop application that reads and writes from/to different files. I think a better solution would be to replace the file system by a SQLite database. How hard is it to migrate ...

热门标签