spring boot—— WebMvcConfigurer接口的用法

矫情吗；* 2023-10-08 09:53 31阅读 0赞

我们用spring boot搭建开发环境的时候，总会去自定义一些消息转换器、拦截器，跨域支持等，所以也在网上看了不少有关这方面知识，把WebMvcConfigurer接口的用法借用过来以供以后开发使用，具体用法如下

import com.alibaba.fastjson.serializer.SerializerFeature;
    import com.alibaba.fastjson.support.config.FastJsonConfig;
    import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
    import com.developlee.configurer.USLocalDateFormatter;
    import org.springframework.format.FormatterRegistry;
    import org.springframework.http.MediaType;
    import org.springframework.http.converter.HttpMessageConverter;
    import org.springframework.http.converter.json.JsonbHttpMessageConverter;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.servlet.config.annotation.CorsRegistry;
    import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
    
    import java.time.LocalDate;
    import java.util.ArrayList;
    import java.util.List;
    import java.util.Locale;
    
    /**
     * @TODO //
     * @Author Lensen
     * @Date 2018/7/21
     * @Description 实现WebMvcConfigurer接口，
     */
    @Configuration
    public class WebConfig implements WebMvcConfigurer {
        
    
        /**
         * 添加类型转换器和格式化器
         * @param registry
         */
        @Override
        public void addFormatters(FormatterRegistry registry) {
        
            registry.addFormatterForFieldType(LocalDate.class, new USLocalDateFormatter());
        }
    
        /**
         * 跨域支持
         * @param registry
         */
        @Override
        public void addCorsMappings(CorsRegistry registry) {
        
            registry.addMapping("/**")
                    .allowedOrigins("*")
                    .allowCredentials(true)
                    .allowedMethods("GET", "POST", "DELETE", "PUT")
                    .maxAge(3600 * 24);
        }
    
        /**
         * 添加静态资源--过滤swagger-api (开源的在线API文档)
         * @param registry
         */
        @Override
        public void addResourceHandlers(ResourceHandlerRegistry registry) {
        
            //过滤swagger
            registry.addResourceHandler("swagger-ui.html")
                    .addResourceLocations("classpath:/META-INF/resources/");
    
            registry.addResourceHandler("/webjars/**")
                    .addResourceLocations("classpath:/META-INF/resources/webjars/");
    
            registry.addResourceHandler("/swagger-resources/**")
                    .addResourceLocations("classpath:/META-INF/resources/swagger-resources/");
    
            registry.addResourceHandler("/swagger/**")
                    .addResourceLocations("classpath:/META-INF/resources/swagger*");
    
            registry.addResourceHandler("/v2/api-docs/**")
                    .addResourceLocations("classpath:/META-INF/resources/v2/api-docs/");
    
        }
        }
    
        /**
         * 配置消息转换器--这里我用的是alibaba 开源的 fastjson
         * @param converters
         */
        @Override
        public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        
            //1.需要定义一个convert转换消息的对象;
            FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();
            //2.添加fastJson的配置信息，比如：是否要格式化返回的json数据;
            FastJsonConfig fastJsonConfig = new FastJsonConfig();
            fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat,
                    SerializerFeature.WriteMapNullValue,
                    SerializerFeature.WriteNullStringAsEmpty,
                    SerializerFeature.DisableCircularReferenceDetect,
                    SerializerFeature.WriteNullListAsEmpty,
                    SerializerFeature.WriteDateUseDateFormat);
            //3处理中文乱码问题
            List<MediaType> fastMediaTypes = new ArrayList<>();
            fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
            //4.在convert中添加配置信息.
            fastJsonHttpMessageConverter.setSupportedMediaTypes(fastMediaTypes);
            fastJsonHttpMessageConverter.setFastJsonConfig(fastJsonConfig);
            //5.将convert添加到converters当中.
            converters.add(fastJsonHttpMessageConverter);
        }
      @Override
        public void addInterceptors(InterceptorRegistry registry) {
        
            registry.addInterceptor(new ReqInterceptor()).addPathPatterns("/**");
        }
    
    }