本文介绍如何使用 Struts2 中的 LookupDispatchAction 实现不同按钮触发不同方法的功能。通过具体示例展示了 JSP 页面设置及 Action 类编写方法，并配置了 Struts-config.xml 文件。
今天使用LookupDispatchAction时,由于编写的类继承LookupDispatchAction,同时也覆盖其execute()方法,结果导致自己编写的逻辑函数不起作用,把覆盖execute()方法的代码去掉即可实现同名按钮提交分别处理的效果,下面是代码:
<%@ page contentType="text/html; charset=GBK" %>
<%@ include file="taglib.jsp" %>
<html>
<head>
<title>
jsp7
</title>
</head>
<body bgcolor="#ffffff">
<html:form action="/processCheckoutAction.do">
<html:text property="abc">
</html:text>
<html:submit property="action"><bean:message
key="welcome.user"/></html:submit>
<html:submit property="action"><bean:message
key="goodbye.user"/></html:submit>
</html:form>
</body>
</html>
public class ProcessCheckoutAction extends LookupDispatchAction ...{
protected Map getKeyMethodMap()...{
Map map=new HashMap();
map.put("welcome.user","saveorder");
map.put("goodbye.user","checkout");
return map;
}
public ActionForward saveorder(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)...{
System.out.println("saveorder");
return (mapping.findForward("success1"));
}
public ActionForward checkout(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)...{
System.out.println("checkout");
return (mapping.findForward("success2"));
}
}
<action name="untitled2ActionForm" parameter="action"
path="/processCheckoutAction" scope="request"
type="test.ProcessCheckoutAction" validate="true">
<forward name="success1" path="/jsp5.jsp" />
<forward name="success2" path="/jsp6.jsp" />
</action>
JSP文件
<%@ page contentType="text/html; charset=GBK" %> <%@ include file="taglib.jsp" %> <html> <head> <title> jsp7 </title> </head> <body bgcolor="#ffffff"> <html:form action="/processCheckoutAction.do"> <html:text property="abc"> </html:text> <html:submit property="action"><bean:message key="welcome.user"/></html:submit> <html:submit property="action"><bean:message key="goodbye.user"/></html:submit> </html:form> </body> </html> 扩展的LookupDispatchAction
public class ProcessCheckoutAction extends LookupDispatchAction ...{ protected Map getKeyMethodMap()...{ Map map=new HashMap(); map.put("welcome.user","saveorder"); map.put("goodbye.user","checkout"); return map; } public ActionForward saveorder(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)...{ System.out.println("saveorder"); return (mapping.findForward("success1")); } public ActionForward checkout(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)...{ System.out.println("checkout"); return (mapping.findForward("success2")); }}Struts-config.xml相应的配置
<action name="untitled2ActionForm" parameter="action" path="/processCheckoutAction" scope="request" type="test.ProcessCheckoutAction" validate="true"> <forward name="success1" path="/jsp5.jsp" /> <forward name="success2" path="/jsp6.jsp" /> </action>
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