SpringBoot处理 CORS 跨域的方法详解

@RestController
@CrossOrigin
@RequestMapping("/situation")
public class SituationController extends PublicUtilController {
    @Autowired
    private SituationService situationService;
    // log日志信息
    private static Logger LOGGER = Logger.getLogger(SituationController.class);
}

@CrossOrigin
public class PublicUtilController {
    /**
     * 公共分页参数整理接口
     *
     * @param currentPage
     * @param pageSize
     * @return
     */
    public PageInfoUtil proccedPageInfo(String currentPage, String pageSize) {
        /* 分页 */
        PageInfoUtil pageInfoUtil = new PageInfoUtil();
        try {
            /*
             * 将字符串转换成整数,有风险, 字符串为a,转换不成整数
             */
            pageInfoUtil.setCurrentPage(Integer.valueOf(currentPage));
            pageInfoUtil.setPageSize(Integer.valueOf(pageSize));
        } catch (NumberFormatException e) {
        }
        return pageInfoUtil;
    }
}

@Configuration
public class CorsConfig extends WebMvcConfigurerAdapter {
    static final String ORIGINS[] = new String[] { "GET", "POST", "PUT", "DELETE" };
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**").allowedOrigins("*").allowCredentials(true).allowedMethods(ORIGINS).maxAge(3600);
    }
}

 @Component
public class CORSFilter implements Filter {
    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        HttpServletResponse res = (HttpServletResponse) response;
        res.addHeader("Access-Control-Allow-Credentials", "true");
        res.addHeader("Access-Control-Allow-Origin", "*");
        res.addHeader("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT");
        res.addHeader("Access-Control-Allow-Headers", "Content-Type,X-CAF-Authorization-Token,sessionToken,X-TOKEN");
        if (((HttpServletRequest) request).getMethod().equals("OPTIONS")) {
            response.getWriter().println("ok");
            return;
        }
        chain.doFilter(request, response);
    }
    @Override
    public void destroy() {
    }
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }
}

location / {
  add_header 'Access-Control-Allow-Origin' '*';
  add_header 'Access-Control-Allow-Credentials' 'true';
  add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
  add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
  if ($request_method = 'OPTIONS') {
    return 204;
  }
}