我正在为Spring MVC中的异常处理示例演示应用程序。我正在尝试Exception Handling With @ControllerAdvice
我按照this链接中描述的步骤进行了操作。
但是当我运行我的应用程序时,我收到以下错误
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is com.test.core.ApplicationException
以下是我正在处理的课程的更多细节
ApplicationException.java
public class ApplicationException extends RuntimeException{
/**
*
*/
private static final long serialVersionUID = -9061684361606685158L;
private ErrorStatus errorStatus;
private int msgNumber;
private Object []args;
public ApplicationException(){}
public ApplicationException(ErrorStatus errorStatus, int msgNumber,
Object[] args) {
this.errorStatus = errorStatus;
this.msgNumber = msgNumber;
this.args = args;
}
//getter setters
}
控制器类
ApplicationExceptionController.java
@Controller
@RequestMapping("/exception")
public class ApplicationExceptionController {
@RequestMapping(value="/error",method=RequestMethod.GET)
@ResponseBody
public void helloException()
{
throw new ApplicationException(ErrorStatus.NotFound,1,new Object[]{"Website"});
//here ErrorStatus is a enum class
}
}
这是GlobalExceptionHandler类
GlobalExceptionHandler.java
@ControllerAdvice
public class GlobalExceptionHandler {
@ExceptionHandler
public void notFount(){
System.out.println("----------CaughtApplicationException-----------");
}
}
调度-servlet.xml中
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation=
"http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
<context:component-scan base-package="com.test.controller,com.test.core" />
<mvc:annotation-driven />
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list> <ref bean="jsonConverter"/></list>
</property>
</bean>
<bean id="jsonConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
<property name="supportedMediaTypes" value="application/json" />
</bean>
我使用http://localhost:8080/SpringExceptionHandling/exception/error此网址
运行上述应用程序但我得到以下例外
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is com.test.core.ApplicationException
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:894)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
root cause
com.test.core.ApplicationException
com.test.controller.ApplicationExceptionController.helloException(ApplicationExceptionController.java:19)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
java.lang.reflect.Method.invoke(Unknown Source)
org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:214)
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:100)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:604)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:565)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
我通过@ControllerAdvice exception handler method are not get called这个链接,但仍然遇到同样的问题 请帮我解决。我没有得到这个例外的实际原因。
答案 0 :(得分:6)
您的异常处理程序中缺少@EnableWebMvc
注释。您的异常处理程序应该是这样的。
@EnableWebMvc
@ControllerAdvice
public class GlobalExceptionHandler {
@ExceptionHandler({ApplicationException.class})
public void notFount(){
System.out.println("----------CaughtApplicationException-----------");
}
@ExceptionHandler({Exception.class})
public void notFountGlobal(){
System.out.println("----------CaughtApplicationException-----------");
}
}
此外,您需要告诉异常处理程序方法您要在哪个方法中捕获哪个异常。最后,您可以指定一个方法,该方法可以捕获所有其他异常,并将其传递给Exception.class。 您发布的代码段为我工作。希望它能解决你的问题。
答案 1 :(得分:3)
在我的例子中,由于方法签名中有附加参数,因此不会调用处理程序方法。
无效:
@ExceptionHandler(NoHandlerFoundException.class)
public ModelAndView handle404(HttpServletRequest request, Exception e, @RequestHeader(value = "referer", required = false) final String referer) {
...
}
referer
参数导致未调用处理程序方法。删除参数后,问题就解决了。
<强>使用:强>
@ExceptionHandler(NoHandlerFoundException.class)
public ModelAndView handle404(HttpServletRequest request, Exception e) {
...
}
答案 2 :(得分:1)
您需要声明异常,以便可以将该方法映射到异常类型。您有两种可能性,要么将异常作为参数说明
public void notFount(ApplicationException exception){
或
将类型添加为@ExceptionHandler注释的值属性
@ExceptionHandler(value = ApplicationException.class)
此外,您很可能遇到配置问题,因为您发布的错误GlobalExceptionHandler
,servlet无法启动,明确表示不会异常类型映射到方法。确保您根据事物的外观扫描您GlobalExceptionHandler
所在的软件包,这很可能是您的问题