配置多视图解析，包括thymeleaf和Json两种视图

WebMvcConfig.java

/**
 * 配置多视图解析，包括thymeleaf和Json两种视图
 * <ul>
 * <li>通过url查看thymeleaf视图</li>
 * <li>通过url+'.json'查看Json视图</li>
 * </ul>
 *
 * @author yanganyu
 * @date 2018/10/15 14:16
 */
@Configuration
@EnableWebMvc
public class WebMvcConfig implements WebMvcConfigurer {

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

	/**
	 * 映射静态资源路径
	 *
	 * @param registry registry
	 * @author yanganyu
	 * @date 2018/10/15 14:30
	 */
	@Override
	public void addResourceHandlers(ResourceHandlerRegistry registry) {
		//相当于 <mvc:resources mapping="/**" location="/static/" /> 也可设置多个路径
		registry.addResourceHandler("/**")
				.addResourceLocations("classpath:/static/");
	}


	/**
	 * Configure ContentNegotiatingViewResolver
	 *
	 * @param manager manager
	 * @return org.springframework.web.servlet.ViewResolver
	 * @author yanganyu
	 * @date 2018/10/15 14:31
	 */
	@Bean
	public ViewResolver contentNegotiatingViewResolver(ContentNegotiationManager manager) {
		ContentNegotiatingViewResolver resolver = new ContentNegotiatingViewResolver();
		resolver.setContentNegotiationManager(manager);

		// 定义所有的视图解析器
		List<ViewResolver> resolvers = new ArrayList<>();
		resolvers.add(jsonViewResolver());
		resolvers.add(thymeleafViewResolver());

		resolver.setViewResolvers(resolvers);
		return resolver;
	}

	/**
	 * Configure View resolver to provide JSON output using JACKSON library to
	 * convert object in JSON format.
	 *
	 * @return org.springframework.web.servlet.ViewResolver
	 * @author yanganyu
	 * @date 2018/10/15 14:33
	 */
	@Bean
	public ViewResolver jsonViewResolver() {
		return (viewName, locale) -> new MappingFastjson2JsonView();
	}

	/**
	 * 配置Thymeleaf视图解析器
	 *
	 * @return org.thymeleaf.spring5.view.ThymeleafViewResolver
	 * @author yanganyu
	 * @date 2018/10/15 14:33
	 */
	private ThymeleafViewResolver thymeleafViewResolver() {
		ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();
		viewResolver.setTemplateEngine(templateEngine());
		// 注意“order”和“viewNames”是可选的
		viewResolver.setOrder(1);
		viewResolver.setViewNames(new String[]{".html"});
		return viewResolver;
	}

	/**
	 * 创建模版引擎并为模板引擎注入模板解析器
	 *
	 * @return org.thymeleaf.spring5.SpringTemplateEngine
	 * @author yanganyu
	 * @date 2018/10/15 14:33
	 */
	@Bean
	public SpringTemplateEngine templateEngine() {
		SpringTemplateEngine templateEngine = new SpringTemplateEngine();
		templateEngine.setTemplateResolver(templateResolver());
		templateEngine.setEnableSpringELCompiler(true);
		return templateEngine;
	}

	/**
	 * 创建模版解析器
	 *
	 * @return org.thymeleaf.templateresolver.ITemplateResolver
	 * @author yanganyu
	 * @date 2018/10/15 14:34
	 */
	@Bean
	public ITemplateResolver templateResolver() {
		SpringResourceTemplateResolver templateResolver = new SpringResourceTemplateResolver();
		templateResolver.setPrefix("classpath:/templates/");
		templateResolver.setSuffix(".html");
		templateResolver.setCharacterEncoding("UTF-8");
		templateResolver.setTemplateMode(TemplateMode.HTML);
		templateResolver.setCacheable(false);
		return templateResolver;
	}

	/**
	 * 配置@Repsonsebody使用fastjson
	 *
	 * @param converters converters
	 * @return void
	 * @author yanganyu
	 * @date 2018/10/15 16:06
	 */
	@Override
	public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
		FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter();
		converters.add(0, converter);
	}

}