jsp c:choose c:ifラベル

org.apache.jasper.JasperException: 
Validation error messages from TagLibraryValidator for c in /book.jsp
150: Illegal child tag in "c:choose" tag: "c:if" tag
227: Illegal child tag in "c:choose" tag: "c:if" tag
227: Illegal "c:if" after "c:otherwise" tag in "c:choose" tag.
	org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:56)
	org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:445)
	org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:75)
	org.apache.jasper.compiler.Validator.validateXmlView(Validator.java:1905)
	org.apache.jasper.compiler.Validator.validateExDirectives(Validator.java:1851)
	org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:218)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:374)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:354)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:341)
	org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:662)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:364)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

ここに入れないでください.そうしないと、間違いを報告します.