Jsp动作标签forward动作标签错误

最新推荐文章于 2021-09-09 14:42:22 发布

原创最新推荐文章于 2021-09-09 14:42:22 发布 · 853 阅读

CC 4.0 BY-SA版权

错误如下：

org.apache.jasper.JasperException: /index.jsp(14,0) Expecting "jsp:param" standard action with "name" and "value" attributes
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:88)
org.apache.jasper.compiler.Parser.parseParam(Parser.java:843)
org.apache.jasper.compiler.Parser.parseBody(Parser.java:1678)
org.apache.jasper.compiler.Parser.parseOptionalBody(Parser.java:1020)
org.apache.jasper.compiler.Parser.parseInclude(Parser.java:872)
org.apache.jasper.compiler.Parser.parseStandardAction(Parser.java:1134)
org.apache.jasper.compiler.Parser.parseElements(Parser.java:1461)
org.apache.jasper.compiler.Parser.parse(Parser.java:137)
org.apache.jasper.compiler.ParserController.doParse(ParserController.java:255)
org.apache.jasper.compiler.ParserController.parse(ParserController.java:103)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:170)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:332)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:312)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:299)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:586)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

原代码如下：

<%@ page language="java" contentType="text/html; charset=gb2312"%>
<html> 
 <head> 
     <title>无名2</title> 
 </head>
<body>
<form name="from1" action="froward.jsp" method="post">
程序示例链接：
<select name="goaddress" onchange="javascript:form1.submit()">
<option value="novalue"></option>
<option value="1">实例13</option>
<option value="2">实例14</option>
</select>
</form>
<%
String s = null;
s = request.getParameter("goaddress");
if(s != null){
	switch(s.charAt(0)){
	case'1':
%>
<jsp:forward page="count.jsp">
</jsp:forward>
<%
	break;
	case'2':
%>
<jsp:forward page="include.jsp">
</jsp:forward>
<%
	break;
	default:
		out.println("你没有选择");
	}
}
	else
		out.println("你没有选择");
%>
</body>
</html>

解决方案：

出现该错误的原因是

<jsp:forward page="count.jsp">和</jsp:forward>这两个标签没有放置在一行，所以造成了错误。

注：<jsp:include>标签没有参数时，<jsp:include page="include/header.jsp">的配对标签</jsp:include>不能换行。