零xml配置SpringMVC返回json数据

Spring MVC 初始化配置详解

最新推荐文章于 2023-03-13 09:45:00 发布

原创最新推荐文章于 2023-03-13 09:45:00 发布 · 351 阅读

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本文介绍了使用 Spring MVC 进行 Web 应用初始化的过程，包括配置 WebAppInitializer 的根配置和 Servlet 配置，实现视图解析器设置，并展示了如何通过控制器处理 RESTful 请求。

偷个懒先占个位贴代码，详细讲解以后再补充

public class WebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer{
    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class<?>[]{RootConfig.class};
    }

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

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

@EnableWebMvc
@Configuration
@ComponentScan(basePackages = {"controller","service"})
public class WebConfig extends WebMvcConfigurerAdapter{

    @Bean
    public ViewResolver viewResolver(){
        InternalResourceViewResolver resolver=new InternalResourceViewResolver();
        resolver.setPrefix("/WEB-INF/views/");
        resolver.setSuffix(".jsp");
        return resolver;
    }

    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }

    @Bean
    public ViewResolver cnViewResolver(ContentNegotiationManager cnn){
        ContentNegotiatingViewResolver resolver=new ContentNegotiatingViewResolver();
        resolver.setContentNegotiationManager(cnn);
        return resolver;
    }

    @Override
    public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
        configurer.defaultContentType(MediaType.TEXT_HTML);
    }
}

Controller：

@Controller
@RequestMapping(value = "/hello")
public class HomeController {

    @Autowired
    private CourseService courseService;

    //添加@ResponseBody作为返回值
    @RequestMapping(value = "/{courseId}",method = RequestMethod.GET)
    public @ResponseBody Course getCourseJson(@PathVariable int courseId){
        return courseService.getCourseById(courseId);
    }
}

结果：