Spring MVC：视图与视图解析器

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.View;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.thymeleaf.spring5.SpringTemplateEngine;
import org.thymeleaf.spring5.view.ThymeleafViewResolver;
import org.thymeleaf.templateresolver.ServletContextTemplateResolver;
 
@Configuration
public class WebConfig implements WebMvcConfigurer {
 
    @Bean
    public ServletContextTemplateResolver templateResolver() {
        ServletContextTemplateResolver templateResolver = new ServletContextTemplateResolver();
        templateResolver.setPrefix("/WEB-INF/templates/");
        templateResolver.setSuffix(".html");
        templateResolver.setTemplateMode("HTML5");
        return templateResolver;
    }
 
    @Bean
    public SpringTemplateEngine templateEngine(ServletContextTemplateResolver templateResolver) {
        SpringTemplateEngine templateEngine = new SpringTemplateEngine();
        templateEngine.setTemplateResolver(templateResolver);
        return templateEngine;
    }
 
    @Bean
    public ViewResolver viewResolver(SpringTemplateEngine templateEngine) {
        ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();
        viewResolver.setTemplateEngine(templateEngine);
        viewResolver.setOrder(1);
        return viewResolver;
    }
}

这个配置类实现了WebMvcConfigurer接口，并定义了Thymeleaf的模板解析器ServletContextTemplateResolver和模板引擎SpringTemplateEngine。然后，它创建了一个ThymeleafViewResolver作为视图解析器，并将Thymeleaf模板引擎注入到视图解析器中。这样，Spring MVC就可以使用Thymeleaf来渲染视图了。