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用JAVA进行编写WEB项目时，我们一般需要对WEB进行统一配置，例如制定拦截路径、页面解析器、跨域配置、fastjson报文解析、文件上传大小配置等。

@Getter
@Setter
@Configuration
public class WebConfiguration  extends WebMvcConfigurationSupport {private static final String MATCH_ALL = "/**";@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(new RequestIdInterceptor()).addPathPatterns(MATCH_ALL);registry.addInterceptor(new MockRequestEntityInterceptor()).addPathPatterns(MATCH_ALL);}@Overridepublic void addViewControllers(ViewControllerRegistry registry) {registry.addViewController("/").setViewName("index");registry.setOrder(Ordered.HIGHEST_PRECEDENCE);super.addViewControllers(registry);}/** Spring mvc 的页面解析器配置*/@Beanpublic InternalResourceViewResolver viewResolver(){InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();viewResolver.setPrefix("/");viewResolver.setSuffix(".html");return viewResolver;}/*** 跨域配置*/public CorsFilter corsFilter() {UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();source.registerCorsConfiguration("/**", corsConfig());return new CorsFilter(source);}/** Spring mvc 的静态资源路径配置*/@Overridepublic void addResourceHandlers(ResourceHandlerRegistry registry) {registry.addResourceHandler("/resource/**").addResourceLocations("classpath:/static/resource/");registry.addResourceHandler("/*.html").addResourceLocations("classpath:/static/");}/** 项目序列化使用fastjson，因序列化解析器执行是列表由前至后的优先级，故把fastjson加入到序列0的位置*/@Overridepublic void extendMessageConverters(List<HttpMessageConverter<?>> converters) {converters.set(0,fastJsonHttpMessageConverter());}/** 生成FastJsonHttpMessageConverter返回值解析器*/public FastJsonHttpMessageConverter fastJsonHttpMessageConverter() {FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter();converter.setFastJsonConfig(fastJsonConfig());converter.setSupportedMediaTypes(mediaTypes());return converter;}/** 生成FastJsonHttpMessageConverter返回值解析器 - 解析详细配置*/public FastJsonConfig fastJsonConfig() {FastJsonConfig fastJsonConfig = new FastJsonConfig();fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat,SerializerFeature.WriteEnumUsingToString);// 日期时间格式及字符集配置fastJsonConfig.setDateFormat("yyyy-MM-dd HH:mm:ss");fastJsonConfig.setCharset(Charset.forName("utf-8"));// 防止Long类型转json丢失精度的问题SerializeConfig serializeConfig = SerializeConfig.globalInstance;serializeConfig.put(Long.class, ToStringSerializer.instance);serializeConfig.put(Long.TYPE, ToStringSerializer.instance);fastJsonConfig.setSerializeConfig(serializeConfig);return fastJsonConfig;}/** 生成FastJsonHttpMessageConverter返回值解析器 - 解析格式组件 支持的mediaType的类型* 1.application/json;charset=UTF-8* 2.application/json*/public List<MediaType> mediaTypes() {List<MediaType> mediaTypeList = new ArrayList<>();mediaTypeList.add(MediaType.APPLICATION_JSON_UTF8);mediaTypeList.add(MediaType.APPLICATION_JSON);return mediaTypeList;}@Beanpublic CommonsMultipartResolver multipartResolver() {CommonsMultipartResolver resolver = new CommonsMultipartResolver();resolver.setDefaultEncoding("UTF-8");//resolveLazily属性启用是为了推迟文件解析，以在在UploadAction中捕获文件大小异常resolver.setResolveLazily(true);resolver.setMaxInMemorySize(40960);//上传文件大小 5M 5*1024*1024resolver.setMaxUploadSize(5 * 1024 * 1024);return resolver;}private CorsConfiguration corsConfig() {CorsConfiguration corsConfiguration = new CorsConfiguration();corsConfiguration.addAllowedOrigin("*");corsConfiguration.addAllowedHeader("*");corsConfiguration.addAllowedMethod("*");corsConfiguration.setAllowCredentials(true);corsConfiguration.setMaxAge(3600L);return corsConfiguration;}
}