异常：java.lang.NoSuchMethodError

Question

异常：java.lang.NoSuchMethodError

4

我正在尝试将PDF文件上传到服务器。我正在使用以下代码块放入控制器：

 @RequestMapping(value = /submit, method = RequestMethod.POST)
 public String upload(UploadItem uploadItem, BindingResult result, HttpServletRequest request, HttpSession session) {

   //some code here

   String name = request.getServletContext().getRealPath("/pdf/" + filename);
   File dest = new File(name);
   try {
        file.transferTo(dest);
   }catch(Exception e){
        System.err.println(e);
   }

   return "redirect:/details";

我这样做是为了将PDF存储到PDF文件中。在我的本地主机上工作正常，但当我在服务器上执行时，会出现以下异常：

exception

org.springframework.web.util.NestedServletException: Handler processing failed; nested exception is java.lang.NoSuchMethodError: javax.servlet.http.HttpServletRequest.getServletContext()Ljavax/servlet/ServletContext;
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:839)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)

root cause

java.lang.NoSuchMethodError: javax.servlet.http.HttpServletRequest.getServletContext()Ljavax/servlet/ServletContext;
frontend.controller.EsteemRatingsController.handleFormUpload(EsteemRatingsController.java:113)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:601)
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:436)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:424)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)

如果我在控制器类中删除提供的行，它就能正常工作（当然不会上传pdf）。有人可以帮我解决这个问题吗？

- Nick Robertson

你使用的是哪个Web容器？看起来你正在运行一些老旧的东西。 - Maurício Linhares

1个回答

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- J-16 SDiZ · Accepted Answer

该方法request.getServletContext()是在servlet 3.0中引入的。请确保您的容器/库支持该版本。

编辑：Tomcat 6仅支持servlet 2.5，请参见http://tomcat.apache.org/whichversion.html

它可以被自动装配：ServletContext和Spring MVC

public class Xxxx{
    @Autowired
    ServletContext context;

    @RequestMapping(value = "/submit", method = RequestMethod.POST)
    public String upload(UploadItem uploadItem, BindingResult result, HttpServletRequest request, HttpSession session) {

       //some code here

       String name = context.getRealPath("/pdf/" + filename);
...