使用spring时，HTTP Status 500 - Request processing failed; nested exception is java.lang.NullPointerException

使用spring，http状态500-请求处理失败；嵌套异常为java.lang.nullpointerexception使用spring时，http状态500-请求处理失败；nested exception is Java . lang . nullpointerexception简介:servlet [spring]的ervlet.service()在带有路径[/home _ furniture]的上下文中three exception[questions