java - 在 Tomcat 上运行 Spring 4 Controller 时找不到请求资源

Question

我尝试运行一个简单的代码，但似乎无法让它工作并调用 Controller

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.mypackage")
public class AppConfig extends WebMvcConfigurerAdapter {
    public void configureViewResolvers(ViewResolverRegistry registry) {

        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setViewClass(JstlView.class);
        viewResolver.setPrefix("/WEB-INF/views/");
        viewResolver.setSuffix(".jsp");
        registry.viewResolver(viewResolver);
    }

    /**
     * Configure ResourceHandlers to serve static resources like CSS/ Javascript etc...
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/static/**").addResourceLocations("/static/");
    }

}

这是我的配置文件，然后我在 com.mypackage 中有一个 Controller ，如下所示:

@Controller
@RequestMapping("/")
public class testControler {

    @Autowired
    AppDataService appDataService;

    @RequestMapping(value = "/hello")
    public Model register(Model model){


        model.addAttribute("name", "Y");
        return model;
    }

    @RequestMapping("/")
    public String index(ModelMap model){

        Date start = new Date();
        System.out.println(start);
        List<AppData> app = appDataService.getListAppData();
        Date end = new Date();
        System.out.println(end);

        String result = "";
        for (Object a : app) {
            result+=a+" <br>";
        } 
        model.addAttribute("name", result);

        return "hello";
    }
}

并且我添加了 hello.jsp。当我通过 eclipse 在 tomcat 服务器上运行项目时，我没有得到 hello.jsp 但我得到了找不到资源，错误 404。我不确定我在这里做错了什么，因为我的理解我应该让起始页点击这个 Controller ，因为 @RequestMapping("/") 但我不确定哪里出了问题或者这里出了什么问题。

我也有注释版本的web.xml如下:

public class AppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class[] { AppConfig.class };
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return null;
    }

    @Override
    protected String[] getServletMappings() {
        return new String[] { "/" };
    }

}

Answer 1

1).在 testControler 类 @RequestMapping("/") 之上再移除一个，因为它会产生双重映射，因为它已经存在于 index() 方法中。

2).修改您的 configureViewResolvers() 以返回 ViewResolver 对象。然后用 @Bean 注释它:

@Bean
public ViewResolver configureViewResolvers() {

        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setViewClass(JstlView.class);
        viewResolver.setPrefix("/WEB-INF/views/");
        viewResolver.setSuffix(".jsp");
        return viewResolver ;
    }

像这样:

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.mypackage")
public class AppConfig extends WebMvcConfigurerAdapter {
    @Bean
   public ViewResolver configureViewResolvers() {

        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setViewClass(JstlView.class);
        viewResolver.setPrefix("/WEB-INF/views/");
        viewResolver.setSuffix(".jsp");
        return viewResolver ;
    }

    /**
     * Configure ResourceHandlers to serve static resources like CSS/ Javascript etc...
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/static/**").addResourceLocations("/static/");
    }

}