处理 Spring Boot REST 应用程序的 404 错误时出错 [英] Error while Handling 404 error for Spring Boot REST application
本文介绍了处理 Spring Boot REST 应用程序的 404 错误时出错的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在 Spring boot 异常处理中尝试了我的手.我创建了一个 REST 应用程序，该应用程序适用于所有有效的 url.我正在尝试处理无效 url 的异常.但是，如果我尝试使用无效的 url 访问应用程序，则会出现以下异常:-
I trying my hand out in Spring boot exception handling . I have created a REST application and the application works for all valid url. I am trying to handle the exceptions for invalid url. But if i try hitting the application with an invalid url , i am getting the below exception:-
13:04:02.940 [http-bio-8081-exec-3] INFO o.s.web.servlet.DispatcherServlet - FrameworkServlet 'dispatcherServlet': initialization completed in 44 ms
13:04:03.177 [http-bio-8081-exec-3] ERROR o.s.boot.context.web.ErrorPageFilter - Cannot forward to error page for/sample/processgetMessage5 (response is committed), so this response may have the wrong status code
java.lang.IllegalStateException: Cannot forward after response has been committed
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:348) ~[catalina.jar:7.0.55]
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:338) ~[catalina.jar:7.0.55]
at org.springframework.boot.context.web.ErrorPageFilter.handleErrorStatus(ErrorPageFilter.java:123) [spring-boot-1.1.4.RELEASE.jar:1.1.4.RELEASE]
at org.springframework.boot.context.web.ErrorPageFilter.doFilter(ErrorPageFilter.java:104) [spring-boot-1.1.4.RELEASE.jar:1.1.4.RELEASE]
at org.springframework.boot.context.web.ErrorPageFilter.doFilter(ErrorPageFilter.java:89) [spring-boot-1.1.4.RELEASE.jar:1.1.4.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.55]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.55]
作为 Spring Boot 的新手，我无法弄清楚原因.任何指示或建议都会有所帮助.
Being new to spring boot I am not able to figure out the reason. Any pointers or suggestion will be helpful.
想尝试本站提到的选项在此处输入链接描述，一旦我能够删除异常.
Wanted to try out the options mentioned in this siteenter link description here, once i am able to remove the exception.
有关如何在 spring 4 中使用注释处理 404 的任何指示都会非常有帮助.
Any pointers on how to handle 404 with annotations in spring 4 will be very helpful.
尝试以下代码:-
@Configuration
@EnableWebMvc
@EnableSwagger
public class WebConfig extends WebMvcConfigurerAdapter {
.......
@Bean
public EmbeddedServletContainerCustomizer containerCustomizer() {
return new EmbeddedServletContainerCustomizer() {
@Override
public void customize(ConfigurableEmbeddedServletContainer container) {
ErrorPage error401Page = new ErrorPage(HttpStatus.UNAUTHORIZED, "/401.html");
ErrorPage error404Page = new ErrorPage(HttpStatus.NOT_FOUND, "/401.html");
ErrorPage error500Page = new ErrorPage(HttpStatus.INTERNAL_SERVER_ERROR, "/401.html");
container.addErrorPages(error401Page, error404Page, error500Page);
}
};
}
从 pom.xml 添加依赖
Adding the dependency from pom.xml
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
<version>1.1.5.RELEASE</version>
<exclusions>
<exclusion>
<artifactId>commons-logging</artifactId>
<groupId>commons-logging</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>1.1.5.RELEASE</version>
<exclusions>
<exclusion>
<artifactId>commons-logging</artifactId>
<groupId>commons-logging</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<version>1.1.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<version>1.1.5.RELEASE</version>
<scope>test</scope>
</dependency>
PFB 更新的堆栈跟踪:-
PFB the updated stack trace:-
22:09:03.210 [http-bio-8081-exec-3] INFO o.s.web.servlet.DispatcherServlet - FrameworkServlet 'dispatcherServlet': initialization completed in 28 ms
22:09:03.413 [http-bio-8081-exec-3] ERROR o.s.boot.context.web.ErrorPageFilter - Cannot forward to error page for/applicationurl/processMessage11 (response is committed), so this response may have the wrong status code
java.lang.IllegalStateException: Cannot forward after response has been committed
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:348) ~[catalina.jar:7.0.55]
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:338) ~[catalina.jar:7.0.55]
at org.springframework.boot.context.web.ErrorPageFilter.handleErrorStatus(ErrorPageFilter.java:134) [spring-boot-1.1.5.RELEASE.jar:1.1.5.RELEASE]
at org.springframework.boot.context.web.ErrorPageFilter.doFilter(ErrorPageFilter.java:111) [spring-boot-1.1.5.RELEASE.jar:1.1.5.RELEASE]
at org.springframework.boot.context.web.ErrorPageFilter.access$000(ErrorPageFilter.java:58) [spring-boot-1.1.5.RELEASE.jar:1.1.5.RELEASE]
at org.springframework.boot.context.web.ErrorPageFilter$1.doFilterInternal(ErrorPageFilter.java:87) [spring-boot-1.1.5.RELEASE.jar:1.1.5.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.0.6.RELEASE.jar:4.0.6.RELEASE]
at org.springframework.boot.context.web.ErrorPageFilter.doFilter(ErrorPageFilter.java:100) [spring-boot-1.1.5.RELEASE.jar:1.1.5.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.55]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.55]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) [catalina.jar:7.0.55]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) [catalina.jar:7.0.55]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501) [catalina.jar:7.0.55
]
该应用程序适用于有效的 url 映射.它是使用弹簧靴构建的.PFB 应用注释类:-
The application works fine for valid url mapping. It is build using spring boot. PFB the app annotated classes:-
@EnableJpaRepositories
@EnableAutoConfiguration
public class AppConfig {
public static void main(String[] args) {
SpringApplication.run(AppConfig .class, args);
}
@Configuration
@EnableWebMvc
public class WebApplicationConfig extends WebMvcConfigurerAdapter {
@Override
public void configureMessageConverters(
List<HttpMessageConverter<?>> converters) {
MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
converters.add(mappingJackson2HttpMessageConverter);
converters.add(new StringHttpMessageConverter());
super.configureMessageConverters(converters);
}
public class WebApplicationXML extends SpringBootServletInitializer {
@Override
protected SpringApplicationBuilder configure(
SpringApplicationBuilder application) {
return application.sources(Application.class);
}
}
推荐答案
如果发生 404，我已添加映射以重定向到自定义 html 页面.PFB 为此所做的更改:
I have added the mapping to redirect to custom html pages if a 404 happens. PFB the changes done for this:
- 从注释中删除了@EnableWebMvcWebConfig.java 类.这样做是为了消除错误响应已经提交"，尝试任何无效的网址.
在 WebConfig.java 类和 revenant html 页面中添加以下代码:
- Removed the Annotation @EnableWebMvc from the WebConfig.java class. This is done to remove the error "response already committed", on trying any invalid url.
Add the below code in WebConfig.java class and the revenant html pages:
@Bean
public EmbeddedServletContainerCustomizer containerCustomizer() {
return new EmbeddedServletContainerCustomizer() {
@Override
public void customize(ConfigurableEmbeddedServletContainer container) {
ErrorPage error401Page = new ErrorPage(HttpStatus.UNAUTHORIZED,
"/401.html");
ErrorPage error404Page = new ErrorPage(HttpStatus.NOT_FOUND,
"/404.html");
ErrorPage error500Page = new ErrorPage(
HttpStatus.INTERNAL_SERVER_ERROR, "/500.html");
ErrorPage error505Page = new ErrorPage(
HttpStatus.HTTP_VERSION_NOT_SUPPORTED, "/505.html");
ErrorPage error506Page = new ErrorPage(
HttpStatus.METHOD_NOT_ALLOWED, "/405.html");
container.addErrorPages(error401Page, error404Page,
error500Page, error505Page, error506Page);
}
};
}
非常感谢您的建议 ans hep.很有用.
Thanks a lot for the suggestions ans hep. It was very useful.
我在完成最初的例外后点击了这个链接
I followed this link after getting through the initial exeception
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