Spring Boot REST应用程序处理404错误时出错
问题内容：
我在SpringBoot异常处理中尝试了一下。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网址的异常。但是，如果我尝试使用无效的url来访问应用程序，则会收到以下异常：-
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，我无法找出原因。任何指示或建议都会有所帮助。
想要尝试此站点中提到的选项时，一旦我能够删除例外，请在此处输入链接描述。
在Spring 4中有关如何处理带有注释的404的任何指针都将非常有帮助。
试用以下代码：
@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添加依赖项
<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更新后的堆栈跟踪：
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
]
该应用程序可以有效地进行有效的URL映射。它是使用Spring Boot构建的。PFB应用程序注释的类：-
@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);
}
}
问题答案：
如果发生404，我已经添加了映射以重定向到自定义html页面。PFB为此所做的更改：
- 从WebConfig.java类中删除了@EnableWebMvc注释。这样做是为了消除尝试任何无效的URL时出现的“响应已提交”错误。
- 在WebConfig.java类和revenant html页面中添加以下代码：
@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。这非常有用。
在完成最初的理解后，我遵循了此链接
