How to detect the submit button clicked in multiple submit button scenarios in a single action class?

I have a form in JSP There are two submit buttons: search and add new

<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 In 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 the struts action class, we know that there is only one method to process HTTP requests, namely the execute () method

In my expectation, when I click the search button, it will perform a search for data and render the data to / example / search JSP, which will redirect the page to / example / add. JSP when I click the "add new button" jsp. However, when clicked, both buttons enter the execute () method So I need to know how to detect the button clicked in the execute () method

The scene 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";
    }
}

Solution

You can use struts Two operations are defined in the XML file and the operation attribute of < s: submit > is used Mark for submission to http://struts.apache.org/docs/submit.html Different operations of

In jsp:

<s:submit value="Search" action="searchEmployeeAction"/>
<s:submit value="Add New" action="addEmployeeAction"/>

In struts In 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 create two public string methods to add and search in your operation

Read about multiple submit buttons http://struts.apache.org/docs/multiple-submit-buttons.html Information about

to update

From struts 2 version 2.3 15.3 to start, you need to add struts mapper. action. prefix. The enabled constant is set to true to enable support for action: prefix

Put it in your struts In the XML file:

<constant name="struts.mapper.action.prefix.enabled" value="true" />