I have a form in a jsp. There are two submit buttons: "Search" and "Add New" button.
<s:form name="searchForm" action="employeeAction" method="post">
<s:textfield name="id" label="Employee ID"/>
<s:textfield name="name" label="Employee Name"/>
<s:submit value="Search"/>
<s:submit value="Add New"/>
</s:form>
In struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<constant name="struts.enable.DynamicMethodInvocation" value="false" />
<constant name="struts.devMode" value="true" />
<package name="default" namespace="/" extends="struts-default">
<default-action-ref name="index" />
<global-results>
<result name="error">/error.jsp</result>
</global-results>
<global-exception-mappings>
<exception-mapping exception="java.lang.Exception" result="error"/>
</global-exception-mappings>
</package>
<package name="example" namespace="/example" extends="default">
<action name="employeeAction" class="example.EmployeeAction">
<result name="search">/example/search.jsp</result>
<result name="add" type="redirect">/example/add.jsp</result>
</action>
</package>
</struts>
In Struts Action class, we know that there is only one method that processing http request, that is execute()
method.
In my expected case, when I clicked Search button, it will perform searching data and render data to /example/search.jsp
, when I clicked Add New button, it will perform redirecting page to /example/add.jsp
. However, both buttons when clicked will go into execute() method. So I need to know how to detect which button clicked in the execute()
method.
The scenario looks like this
public class EmployeeAction extends ActionSupport {
public String execute() throws Exception {
//PSEUDOCODE
//IF (submitButton is searchButton)
// return doSearch();
//ELSE IF (submitButton is addNewButton)
// return doAddNew();
return SUCCESS;
}
public String doSearch() throws Exception {
//perform search logic here
return "search";
}
public String doAddNew() throws Exception {
return "add";
}
}
You can define two actions in struts.xml
file and use action
attribute of <s:submit>
tag in order to submit to different actions http://struts.apache.org/docs/submit.html.
In JSP:
<s:submit value="Search" action="searchEmployeeAction"/>
<s:submit value="Add New" action="addEmployeeAction"/>
In struts.xml:
<action name="addEmployeeAction" method="add" class="example.EmployeeAction">
<result>/example/add.jsp</result>
</action>
<action name="searchEmployeeAction" method="search" class="example.EmployeeAction">
<result>/example/search.jsp</result>
</action>
And in your action create two public String
methods add
and search
.
Read about Multiple Submit Buttons http://struts.apache.org/docs/multiple-submit-buttons.html.
Update
Starting from Struts2 version 2.3.15.3 you need to set struts.mapper.action.prefix.enabled
constant to true in order to enable support for action:
prefix.
Put that in your struts.xml
file:
<constant name="struts.mapper.action.prefix.enabled" value="true" />