我有一个.jsp页面,其中有四个名为Submit,add,update和delete的按钮,分别为:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <%@taglib uri="/struts-tags" prefix="s" %> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Insert title here</title> </head> <body> <s:form action="User" > <s:submit /> <s:submit action="addUser" value="Add" /> <s:submit action="updateUser" value="Update" /> <s:submit action="deleteUser" value="Delete" /> </s:form> </body> </html>
如我的struts.xml文件中所述,每次提交时,它将被重定向到操作类,如下所示:
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"> <struts> <package name="default" extends="struts-default"> <action name="User" class="vaannila.UserAction"> <result name="success">/success.jsp</result> </action> <action name="addUser" method="add" class="vaannila.UserAction"> <result name="success">/success.jsp</result> </action> <action name="updateUser" method="update" class="vaannila.UserAction"> <result name="success">/success.jsp</result> </action> <action name="deleteUser" method="delete" class="vaannila.UserAction"> <result name="success">/success.jsp</result> </action> </package> </struts>
最后将动作类的对应方法设为:
package vaannila; import com.opensymphony.xwork2.ActionSupport; public class UserAction extends ActionSupport{ private String message; public String execute() { System.out.println("Inside execute method"); message = "Inside execute method"; return SUCCESS; } public String add() { System.out.println("Inside add method"); message = "Inside add method"; return SUCCESS; } public String update() { message = "Inside update method"; return SUCCESS; } public String delete() { message = "Inside delete method"; return SUCCESS; } public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } }
当我单击Submit按钮时,它会执行执行方法。但是,当我再次单击“添加”按钮或任何其他按钮时,它将重定向到执行方法,而不是“添加”方法。我究竟做错了什么?期待您的回答。提前致谢
假设您使用的是Struts2版本2.3.15.3或更高版本,则需要将struts.mapper.action.prefix.enabled常数设置为true才能启用对action:前缀的支持。
2.3.15.3
struts.mapper.action.prefix.enabled
action:
把它放在你的struts.xml文件中:
struts.xml
<constant name="struts.mapper.action.prefix.enabled" value="true" />