JSP<HTML: Form styleid = "delform" Action = "/category. do? Method = deletecolletion ">
<Logic: iterate id = "category" name = "categories">
<Tr>
<TD <input type = "checkbox" name = "IDS" value = "<Bean: write name =" category "property =" ID "/>"> TD>
<TD>... </TD>
</Tr>
</Logic: iterate>
<Input type = "checkbox" name = "isselected" value = "true"
Onclick = "If (delform. isselected. Checked = true)
{For (VAR I = 0; I <delform. IDs. length; I ++) {delform. IDS [I]. Checked = true ;}}
Else {for (VAR I = 0; I <delform. IDs. length; I ++) {delform. IDS [I]. checked = false ;}}"/> select all & nbsp; <a href = "javascript: if (confirm ('Do you really want to delete the selected column? ') Delform. Submit () "> delete all selected columns </a>
</Html: Form>
Formbean(I am using dynaactionform, so configure it in the struts-config.xml)
<Form-bean name = "testingform" type = "org. Apache. Struts. Action. dynaactionform">
<Form-property name = "ID" type = "Java. Lang. String"/>
<Form-property name = "IDS" type = "Java. Lang. Long []"/>
........
</Form-bean>
Action
Public actionforward execute (actionmapping mapping, actionform form,
Httpservletrequest request, httpservletresponse response)
Throws exception {
// Obtain the operation name
Dynaactionform LS-DYNA = (dynaactionform) form;
// IDs array is the ID value of all selected records
Long [] IDs = (long []) LS-DYNA. Get ("IDS ");
// Call the corresponding DAO method to delete all specified IDS
Return Mapping. findforward (".....");
}
Description
The key lies in the settings of formbean, that is, the array IDs. The general implementation method will traverse all the selected checkboxes on the client first, then assemble the string using JS and pass it to the action, parse the string in the background to get all the selected specified IDs. This method is not inappropriate, but it is simpler to use struts, here, we use the array attribute of a formbean to correspond to the checkbox DHTML array object on the page. Struts completes traversing all the checkboxes for us and finds out all the values of the selected checkbox. Is it simpler? Another thing I need to understand is that HTML: The Bean used by iterate and the formbean used for batch deletion are two different things. At first, I almost got confused.
