ERROR：Invalid syntax for function signature in TLD

時間 2019-11-10

標籤 error invalid syntax function signature tld 简体版

原文原文鏈接

報錯的log java

嚴重: Servlet.service() for servlet jsp threw exception
org.apache.jasper.JasperException: Invalid syntax for function signature in TLD.  Tag Library: 某某某, Function: xxxx
	at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:56)
	at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:445)
	at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:165)
	at org.apache.jasper.compiler.Validator$ValidateVisitor.getMethod(Validator.java:1643)
	at org.apache.jasper.compiler.Validator$ValidateVisitor.processSignature(Validator.java:1630)
	at org.apache.jasper.compiler.Validator$ValidateVisitor.access$400(Validator.java:418)
	at org.apache.jasper.compiler.Validator$ValidateVisitor$1FVVisitor.visit(Validator.java:1606)
	at org.apache.jasper.compiler.ELNode$Function.accept(ELNode.java:139)
	at org.apache.jasper.compiler.ELNode$Nodes.visit(ELNode.java:214)
	at org.apache.jasper.compiler.ELNode$Visitor.visit(ELNode.java:256)
	at org.apache.jasper.compiler.ELNode$Root.accept(ELNode.java:61)
	at org.apache.jasper.compiler.ELNode$Nodes.visit(ELNode.java:214)
	at org.apache.jasper.compiler.Validator$ValidateVisitor.validateFunctions(Validator.java:1610)
	at org.apache.jasper.compiler.Validator$ValidateVisitor.getJspAttribute(Validator.java:1381)
	at org.apache.jasper.compiler.Validator$ValidateVisitor.checkXmlAttributes(Validator.java:1231)
	at org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:876)
	at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1553)
	at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392)
	at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2444)
	at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2450)
	at org.apache.jasper.compiler.Node$Root.accept(Node.java:474)
	at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392)
	at org.apache.jasper.compiler.Validator.validateExDirectives(Validator.java:1845)
	at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:218)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:374)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:354)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:341)
	at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:657)
	at org.apache.jasper.servlet.JspServletWrapper.loadTagFile(JspServletWrapper.java:240)
	at org.apache.jasper.compiler.TagFileProcessor.loadTagFile(TagFileProcessor.java:578)
	at org.apache.jasper.compiler.TagFileProcessor.access$000(TagFileProcessor.java:49)
	at org.apache.jasper.compiler.TagFileProcessor$TagFileLoaderVisitor.visit(TagFileProcessor.java:655)
	at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1553)
	at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392)
	at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2444)
	at org.apache.jasper.compiler.TagFileProcessor$TagFileLoaderVisitor.visit(TagFileProcessor.java:659)
	at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1553)
	at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392)
	at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2444)
	at org.apache.jasper.compiler.TagFileProcessor$TagFileLoaderVisitor.visit(TagFileProcessor.java:659)
	at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1553)
	at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392)
	at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2444)
	at org.apache.jasper.compiler.TagFileProcessor$TagFileLoaderVisitor.visit(TagFileProcessor.java:659)
	at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1553)
	at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392)
	at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2444)
	at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2450)
	at org.apache.jasper.compiler.Node$Root.accept(Node.java:474)
	at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392)
	at org.apache.jasper.compiler.TagFileProcessor.loadTagFiles(TagFileProcessor.java:673)
	at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:230)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:374)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:354)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:341)
	at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:657)
	at org.apache.jasper.servlet.JspServletWrapper.loadTagFile(JspServletWrapper.java:240)
	at org.apache.jasper.compiler.TagFileProcessor.loadTagFile(TagFileProcessor.java:578)
	at org.apache.jasper.compiler.TagFileProcessor.access$000(TagFileProcessor.java:49)
	at org.apache.jasper.compiler.TagFileProcessor$TagFileLoaderVisitor.visit(TagFileProcessor.java:655)
	at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1553)
	at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392)
	at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2444)
	at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2450)
	at org.apache.jasper.compiler.Node$Root.accept(Node.java:474)
	at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392)
	at org.apache.jasper.compiler.TagFileProcessor.loadTagFiles(TagFileProcessor.java:673)
	at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:230)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:374)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:354)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:341)
	at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:657)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)

錯誤的.tld文件 function:encodeUrl apache

<function>
		<description>
			Encodes given URL
		</description>
		<name>encodeUrl</name>
		<function-class>xx.xxxxx.xxxxxx.xxxxxxxxxx.tags.Functions</function-class>
		<function-signature>java.lang.String
                                  encodeUrl(java.lang.String)</function-signature>
	</function>

修改後的 function app

        <function>
		<description>
			Encodes given URL
		</description>
		<name>encodeUrl</name>
		<function-class>xx.xxxxx.xxxxxx.xxxxxxxxxx.tags.Functions</function-class>
		<function-signature>java.lang.String encodeUrl(java.lang.String)</function-signature>
	</function>

對不發現function jsp

1.錯誤的函數

<function-signature>返回值類型 spa

方法名（參數）</function-signature> code

2.改正後的 ip

<function-signature>返回值類型方法名（參數）</function-signature> get

原來function-signature標籤裏面，函數聲明跟返回類型必須在同一行，都是習慣Ctrl+Shift+F惹的禍！