一些常用的实现WebMvcConfigurationSupport的方法

一些常用的实现WebMvcConfigurationSupport的方法

@Configuration
public class CorsConfig extends WebMvcConfigurationSupport {

    /*
     * 这里主要为了解决跨域问题,所以重写addCorsMappings方法
     */
    @Override
    protected void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOrigins("*")
                .allowedMethods("GET", "HEAD", "POST", "PUT", "DELETE", "OPTIONS")
                .allowedHeaders("*")
                .exposedHeaders("access-control-allow-headers",
                        "access-control-allow-methods",
                        "access-control-allow-origin",
                        "access-control-max-age",
                        "X-Frame-Options")
                .allowCredentials(false).maxAge(3600);
        super.addCorsMappings(registry);
    }

    //解决swagger映射
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/**").addResourceLocations(
                "classpath:/static/");
        registry.addResourceHandler("/swagger-ui.html").addResourceLocations(
                "classpath:/META-INF/resources/");
        registry.addResourceHandler("/webjars/**").addResourceLocations(
                "classpath:/META-INF/resources/webjars/");
        super.addResourceHandlers(registry);
    }

    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        for (HttpMessageConverter<?> converter : converters) {
            // 解决 Controller 返回普通文本中文乱码问题
            if (converter instanceof StringHttpMessageConverter) {
                ((StringHttpMessageConverter) converter).setDefaultCharset(StandardCharsets.UTF_8);
            }

            // 解决 Controller 返回json对象中文乱码问题
            if (converter instanceof MappingJackson2HttpMessageConverter) {
                ((MappingJackson2HttpMessageConverter) converter).setDefaultCharset(StandardCharsets.UTF_8);
            }
        }
    }

    //定义时间格式转换器
    @Bean
    public MappingJackson2HttpMessageConverter jackson2HttpMessageConverter() {
        MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
        ObjectMapper mapper = new ObjectMapper();
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        mapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
        converter.setObjectMapper(mapper);
        return converter;
    }

    //添加转换器
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        //将我们定义的时间格式转换器添加到转换器列表中,
        //这样jackson格式化时候但凡遇到Date类型就会转换成我们定义的格式
        converters.add(jackson2HttpMessageConverter());
    }

}