content: package com.open.capacity.security.config;
  
  import com.open.capacity.security.page.table.PageTableArgumentResolver;
  import org.springframework.beans.factory.annotation.Value;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.stereotype.Component;
  import org.springframework.util.ResourceUtils;
  import org.springframework.web.context.request.RequestContextListener;
  import org.springframework.web.cors.CorsConfiguration;
  import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
  import org.springframework.web.filter.CorsFilter;
  import org.springframework.web.method.support.HandlerMethodArgumentResolver;
  import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
  import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
  
  import java.io.File;
  import java.util.List;
  
  @Component
  @Configuration
  public class WebMvcConfig extends WebMvcConfigurerAdapter {
  
      /**
       * 上传文件根路径
       */
      @Value("${files.path}")
      private String filesPath;
  
      /**
       * 跨域支持
       *
       * @return
       */
      @Bean
      // 前后分离 ajax跨域调用处理
      public CorsFilter corsFilter() {
          final UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
          final CorsConfiguration config = new CorsConfiguration();
          config.setAllowCredentials(true); // 允许cookies跨域
          config.addAllowedOrigin("*");// 允许向该服务器提交请求的URI，*表示全部允许。。这里尽量限制来源域，比如http://xxxx:8080
          // ,以降低安全风险。。
          config.addAllowedHeader("*");// 允许访问的头信息,*表示全部
          config.setMaxAge(18000L);// 预检请求的缓存时间（秒），即在这个时间段里，对于相同的跨域请求不会再预检了
          config.addAllowedMethod("*");// 允许提交请求的方法，*表示全部允许，也可以单独设置GET、PUT等
          /*
           * config.addAllowedMethod("HEAD"); config.addAllowedMethod("GET");//
           * 允许Get的请求方法 config.addAllowedMethod("PUT");
           * config.addAllowedMethod("POST"); config.addAllowedMethod("DELETE");
           * config.addAllowedMethod("PATCH");
           */
          source.registerCorsConfiguration("/**", config);
          return new CorsFilter(source);
      }
  
      @Bean
      public RequestContextListener requestContextListener() {
          return new RequestContextListener();
      }
  
      /**
       * datatable分页解析
       *
       * @return
       */
      @Bean
      public PageTableArgumentResolver tableHandlerMethodArgumentResolver() {
          return new PageTableArgumentResolver();
      }
  
      @Override
      public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
          argumentResolvers.add(tableHandlerMethodArgumentResolver());
      }
  
      /**
       * 外部文件访问
       */
      @Override
      public void addResourceHandlers(ResourceHandlerRegistry registry) {
          registry.addResourceHandler("/statics/**")
                  .addResourceLocations(ResourceUtils.FILE_URL_PREFIX + filesPath + File.separator);
      }
  
  }
  