Java Spring Boot“无可用消息”错误（状态= 404），
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Spring Boot "No message available" error(status = 404),
提问by Vlad Sereda
I'm using Spring Boot with embeded Tomcat. When it starts it logs into console:
我正在使用带有嵌入式 Tomcat 的 Spring Boot。当它启动时，它会登录到控制台：
s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/home]}" onto public java.lang.String com.vlad.pet.contactlist.webapp.controller.SampleController.helloWorld(org.springframework.ui.Model)
swsmmaRequestMappingHandlerMapping ：将“{[/home]}”映射到公共 java.lang.String com.vlad.pet.contactlist.webapp.controller.SampleController.helloWorld(org.springframework.ui.Model)
So I guess the URL is mapped to the controller. But http://localhost:8090/homegives me an error 404.
所以我猜 URL 被映射到控制器。但是http://localhost:8090/home给了我一个错误 404。
There was an unexpected error (type=Not Found, status=404). No message available
出现意外错误（类型=未找到，状态=404）。没有可用的消息
Application.java
应用程序.java
@SpringBootApplication
public class Application extends SpringBootServletInitializer {
public static void main(final String[] args) {
SpringApplication.run(Application.class, args);
}
//overrides the configure() method to point to itself, so Spring can find the main configuration.
@Override
protected final SpringApplicationBuilder configure(final SpringApplicationBuilder application) {
return application.sources(Application.class);
}
@Bean
public ViewResolver getViewResolver() {
final TilesViewResolver resolver = new TilesViewResolver();
resolver.setViewClass(TilesView.class);
return resolver;
}
@Bean
public TilesConfigurer getTilesConfigurer() {
final TilesConfigurer configurer = new TilesConfigurer();
configurer.setDefinitions("WEB-INF/tiles/tiles.xml");
configurer.setCheckRefresh(true);
return configurer;
}
}
SampleController.java
示例控制器.java
@Controller
public class SampleController {
@RequestMapping (value = "/home")
public String helloWorld(Model model) {
model.addAttribute("pageTitle", "home");
return "base";
}
}
tiles.xml
瓷砖.xml
<tiles-definitions>
<definition name="base" template="/WEB-INF/tiles/basic/basic-template.jsp">
<put-attribute name="head" value="/WEB-INF/tiles/basic/head.jsp" />
</definition>
</tiles-definitions>
回答by exe
You're returning 'home' from your controller method, but I don't see a home.jsp on your project structure.
您正在从控制器方法返回 'home'，但我在您的项目结构中没有看到 home.jsp。
回答by Vlad Sereda
I solved this problem by enabling default servlet:
我通过启用默认 servlet 解决了这个问题：
@Configuration
@EnableWebMvc
public class Config extends WebMvcConfigurerAdapter {
@Override
public void configureDefaultServletHandling(
DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
资料来源：使用 Spring Boot 配置 ViewResolver 和注释给出了未找到带有 URI 错误的 HTTP 请求的映射
回答by zxholy
You can use @RestControllerinstead of @Controller.
您可以使用@RestController代替@Controller.
@RestController
public class SampleController {
...
回答by Cshah
In my case, my eclipse project was showing an error. i had to do mvn install from eclipse, update maven dependencies and then start the server from eclipse.
就我而言，我的 eclipse 项目显示错误。我必须从 eclipse 执行 mvn install，更新 maven 依赖项，然后从 eclipse 启动服务器。
