Spring Boot Whitelabel 错误页面几乎无处不在
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Spring Boot Whitelabel Error Page almost everywhere
提问by Zhannur Diyas
Facing some difficulties trying to run Spring Boot to work with JSP pages. I know the limitations provided in documentation, so made everything according to the rules. However, can't find a problem.
在尝试运行 Spring Boot 以处理 JSP 页面时遇到一些困难。我知道文档中提供的限制，所以一切都按照规则进行。但是，找不到问题。
I'll try to provide as much information as possible.
我会尽量提供尽可能多的信息。
Wanted to start using Spring Boot. I'm using:
想开始使用 Spring Boot。我正在使用：
IntelliJ IDEA, Maven, Maven Spring Boot Plugin, Embedded Tomcat. Linkto the project sample.
IntelliJ IDEA、Maven、Maven Spring Boot 插件、嵌入式 Tomcat。链接到项目示例。
The REST controller works fine, but when I try to link jsp to the common controller, I 100% end up with Whitelabel error page, stating 404.
REST 控制器工作正常，但是当我尝试将 jsp 链接到通用控制器时，我 100% 最终会看到 Whitelabel 错误页面，指出 404。
Moving files from WEB-INFto resources/staticdoesn't help.
将文件从 移动WEB-INF到resources/static没有帮助。
The problem is even when I'm trying to run the simplest quick-start Spring Boot projects, I'm facing exceptions. Here's exception log when I tried to load the example from mkyong site.
问题是，即使当我尝试运行最简单的快速启动 Spring Boot 项目时，我也遇到了异常。这是我尝试从 mkyong 站点加载示例时的异常日志。
I tried to manage maven dependencies manually, as I browsed through some "potential" solutions and found that it could be jar conflict. I even tried to launch the project on a completely fresh operational system - that's the level of my despair.
我尝试手动管理 maven 依赖项，因为我浏览了一些“潜在”解决方案，发现可能是 jar 冲突。我什至试图在一个全新的操作系统上启动这个项目——这就是我的绝望程度。
Any guidance will be accepted as a divine ambrosia.
任何指导都将被接受为神圣的佳肴。
UPDATE
更新
When trying to run the project again using mvn spring-bootafter adding javax.servlet-apiin dependencies got the following error. Log:
mvn spring-boot添加javax.servlet-api依赖项后尝试再次运行项目时出现以下错误。日志：
[ERROR] Failed to execute goal org.springframework.boot:spring-boot-
maven-plugin:1.4.5.RELEASE:run (default-cli) on project demo: An
exception occurred while running. null: InvocationTargetException:
Unable to start embedded container; nested exception is org.springframework.boot.context.embedded.EmbeddedServletContainerExceptio
n: Unable to start embedded Tomcat: Failed to start component
[StandardServer[-1]]: Failed to start component [StandardService[Tomcat]]:
Failed to start component [StandardEngine[Tomcat]]: A child container
failed during start -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with
the -
e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions,
please read the following articles:
[ERROR] [Help 1]
http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
UPDATE
更新
Using suggestion of @Piotr Gwiazda, tried the same but with Thymeleaf instead of JSP. Worked. However, I would like to know why JSP did not.
使用@Piotr Gwiazda 的建议，尝试了相同的方法，但使用 Thymeleaf 而不是 JSP。工作了。但是，我想知道为什么 JSP 没有。
采纳答案by Achille_vanhoutte
For some reason, your code has two webapp folders. One (wrong location)under src/and the other one under (correct)src/main/. Now your WEB-INF/jsp whas in the wrong one. So, move it to the appropriate folder.
出于某种原因，您的代码有两个 webapp 文件夹。一个（错误的位置）在src/ 下，另一个在（正确的）src/main/ 下。现在你的 WEB-INF/jsp 出错了。因此，将其移动到相应的文件夹。
回答by niteshbisht
you can use one such sample configuration
您可以使用一种这样的示例配置
Create src/main/resources source package and place the static resources in that location.
创建 src/main/resources 源包并将静态资源放置在该位置。
@Configuration
@EnableWebMvc
public class WebMvcConfig extends WebMvcConfigurerAdapter {
private static final String[] CLASSPATH_RESOURCE_LOCATIONS = { "classpath:/META-INF/resources/",
"classpath:/resources/", "classpath:/static/", "classpath:/public/" };
@Bean
public ViewResolver getViewResolver() {
InternalResourceViewResolver resolver = new InternalResourceViewResolver();
//resolver.setPrefix("/resources/");
resolver.setSuffix(".html");
return resolver;
}
@Override
public void configureDefaultServletHandling(
DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/**").addResourceLocations(CLASSPATH_RESOURCE_LOCATIONS);
}
}
回答by Piotr Gwiazda
Seems that you're trying to use JSP page as template for view rendering for HelloController. Means that JSP file should be probably in src/main/resources/templates.
似乎您正在尝试使用 JSP 页面作为HelloController. 意味着 JSP 文件应该在src/main/resources/templates.
Mind that JSPs are not the suggested way for creating views. I'd give Thymeleafor others a chance. See here
