春季宠物诊所：“${owner.new}”包含无效表达式，Tomcat (6.0.32)

Question

svn co https://src.springframework.org/svn/spring-samples/petclinic/trunk/ petclinic
cd petclinic; mvn clean package

petclinic.war 可以很好地部署到 Tomcat (6.0.32)，但访问应用程序时，样式不会显示。

Root cause is: /WEB-INF/jsp/owners/form.jsp (line: 4, column: 1) 
"${owner.new}" contains invalid expression(s): 
javax.el.ELException: Failed to parse the expression [${owner.new}]
org.apache.jasper.JasperException: /WEB-INF/jsp/owners/form.jsp (line:4, column: 1) "${owner.new}" contains invalid expression(s):
javax.el.ELException: Failed to parse the expression [${owner.new}] at
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:42) at
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:408) at
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:199) at
org.apache.jasper.compiler.Validator$ValidateVisitor.checkXmlAttributes(Validator.java:1218) at
org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:870) at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1539) at
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376) at
org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2428) at
org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:889) at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1539) at
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376) at
org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2428) at
org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2434) at
org.apache.jasper.compiler.Node$Root.accept(Node.java:475) at
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376) at
org.apache.jasper.compiler.Validator.validateExDirectives(Validator.java:1790) at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:217) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:373) at
org.apache.jasper.compiler.Compiler.compile(Compiler.java:353) at
org.apache.jasper.compiler.Compiler.compile(Compiler.java:340) at
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:644) at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:358) at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:389) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:333) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at

有什么额外需要配置的吗？

Answer 1

使用这个占位符怎么样
${所有者['新']}
？