二、分派Action

一、普通的Action被调用，不管怎么被调用都是执行同一个函数execute()，而选择分派Action可以在一个action里写多个执行函数，然后通过(提交给xx.do的时候)传不同的参数(xx.do?xx=xx)来分别调用不同的执行函数。

1.新建一个web项目StrutsLogin

2.WEB-INF下新建login.jsp

<!-- 交给logins.do处理的时候还附带了一个参数信息flag=login -->
    <form action="logins.do?flag=login" method="post">
        u:<input type="text" name="name"><br/>
        p:<input type="password" name="password"><br/>
        <input type="submit" value="提交">
        <!-- 交给logins.do处理的时候还附带了一个参数信息flag=exit -->
        <button><a href="login.do?flag=exit">退出</a></button>
    </form>

3.com.actions包下新建DispatchAction.java，两个用来处理的函数名称分别为login和exit

package com.actions;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

public class DispatchAction extends org.apache.struts.actions.DispatchAction{
    
    public ActionForward login(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        // TODO Auto-generated method stub
        return mapping.findForward("login");
    }
    

    public ActionForward exit(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        // TODO Auto-generated method stub
        return mapping.findForward("exit");
    }
}

3.配置struts-config.xml

<struts-config>
    <form-beans>
        <form-bean name="userForm" type="com.forms.UserForm"></form-bean>
    </form-beans>
    <action-mappings>
        <action path="/logins" input="/WEB-INF/login.jsp" attribute="userForm" name="userForm" parameter="flag" scope="request" type="com.actions.DispatchAction">
            <forward name="login" path="/WEB-INF/ok.jsp"></forward>
            <forward name="exit" path="/WEB-INF/exit.jsp"></forward>
        </action>
        
    </action-mappings>
</struts-config>