弹簧引导"No message available"错误(状态 = 404)，

Question

我使用Spring Boot与嵌入式Tomcat。当它启动时，它会登录到控制台:

s.w.s.m.m.a。RequestMappingHandlerMapping:映射"{[/home]}"到public java.lang.String com.vlad.宠物.contactlist.webapp.controller. samplecontroller . helloworld (org.springframework.ui.Model)

所以我猜URL映射到控制器。但是http://localhost:8090/home给了我一个错误404

出现意外错误(type=Not Found, status=404)。无消息可用

Application.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

@Controller
public class SampleController {
    @RequestMapping (value = "/home")
    public String helloWorld(Model model) {
        model.addAttribute("pageTitle", "home");
        return "base";
    }
}

tiles.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>

我的项目结构

Answer 1

可以用@RestController代替@Controller

@RestController
public class SampleController {
... 

Answer 2

您正在从控制器方法返回'home'，但我没有在您的项目结构上看到home.jsp。

Answer 3

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();
    }

来源:配置ViewResolver与Spring Boot和注释给出没有映射的HTTP请求与URI错误

Answer 4

在我的例子中，我的eclipse项目显示了一个错误。我必须从eclipse安装MVN，更新maven依赖项，然后从eclipse启动服务器。