我正在尝试使用 Dispatcher 运行一个简单的 Struts 示例,但出现以下错误
SEVERE: Servlet.service() for servlet [jsp] in context with path [/StrutsDispatcher] threw
exception [java.lang.NullPointerException: Module 'null' not found.] with root cause
java.lang.NullPointerException: Module 'null' not found.
at org.apache.struts.taglib.TagUtils.getModuleConfig(TagUtils.java:755)
at org.apache.struts.taglib.TagUtils.computeURLWithCharEncoding(TagUtils.java:364)
at org.apache.struts.taglib.TagUtils.computeURLWithCharEncoding(TagUtils.java:285)
at org.apache.struts.taglib.html.LinkTag.calculateURL(LinkTag.java:445)
下面是我的 JSP 页面和struts-config
代码:
stuts-config
文件:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
"http://struts.apache.org/dtds/struts-config_1_2.dtd">
<struts-config>
<display-name> Dispatcher demo</display-name>
<description>Dispatcher beginning </description>
<form-beans>
<form-bean name="DispatchActionForm" type="org.strutsDispatcher.DispatcherActionForm"></form-bean>
</form-beans>
<action-mappings>
<action path="/test" type="org.strutsDispatcher.DispatchActionTest"
parameter="parameter" input="/dispatchAction.jsp" name="DispatchActionForm"
scope="request" validate="false">
<forward name="add" path="/dispathcerActionAdd.jsp"></forward>
<forward name="save" path="/dispathcerActionSave.jsp"></forward>
<forward name="edit" path="/dispathcerActionEdit.jsp"></forward>
</action>
</action-mappings>
</struts-config>
JSP页面:
<%@ 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="http://struts.apache.org/tags-html" prefix="html"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<h3>Dispatcher Action Example</h3>
<p><html:link page="test.do?parameter=add">Call Add section</html:link>
<p><html:link page="test.do?parameter=edit">Call Edit Section</html:link></p>
<p><html:link page="test.do?parameter=save">Call Save Section</html:link></p>
</body>
</html>