DispatchAction

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同一个Action完成对数据的增、删、改、查，其实就是开发一个DispatchAction的子类，这里的方法与execute方法同参、同返回值，在配置中需要在action标签下添加parameter属性

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts-config PUBLIC "-//Apache Software Foudation//DTD Struts Configuration 1.3//EN" "http://struts.apache.org/dtds/struts-config_1_3.dtd"><struts-config><form-beans><form-bean type="StudentForm" name="demo.StudentForm"></form-bean></form-beans><action-mappings><action path="/studentAction" type="demo.StudentAction" name="StudentForm" parameter="method"></action></action-mappings></struts-config>

<?xml version="1.0" encoding="UTF-8"?><web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">  <display-name></display-name>  <welcome-file-list>    <welcome-file>index.jsp</welcome-file>  </welcome-file-list>  <servlet>  <servlet-name>ActionServlet</servlet-name><servlet-class>org.apache.struts.action.ActionServlet</servlet-class>    <init-param><param-name>config</param-name><param-value>/WEB-INF/struts-config.xml</param-value>  </init-param>  <load-on-startup>0</load-on-startup>  </servlet>    <servlet-mapping>  <servlet-name>ActionServlet</servlet-name><url-pattern>*.do</url-pattern>  </servlet-mapping></web-app>

package demo;import java.io.PrintWriter;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;import org.apache.struts.actions.DispatchAction;public class StudentAction extends DispatchAction {public ActionForward add(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response) throws Exception {PrintWriter out=response.getWriter();out.print("add...");return null;}public ActionForward delete(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response) throws Exception {PrintWriter out=response.getWriter();out.print("delete...");return null;}public ActionForward update(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response) throws Exception {PrintWriter out=response.getWriter();out.print("update...");return null;}public ActionForward query(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response) throws Exception {PrintWriter out=response.getWriter();out.print("query...");return null;}}

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