jsp c:choose c:if标签

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org.apache.jasper.JasperException: <h3>Validation error messages from TagLibraryValidator for c in /book.jsp</h3><p>150: Illegal child tag in "c:choose" tag: "c:if" tag</p><p>227: Illegal child tag in "c:choose" tag: "c:if" tag</p><p>227: Illegal "c:if" after "c:otherwise" tag in "c:choose" tag.</p>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)

<c:choose>

<c:if></c:if>不要放在这里面，不然就报错了

<c:when test=””>

</c:when>

<c:otherwise>

</c:otherwise>

</c:choose>

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