跨域问题解决（Servlet,SpringBoot）

谁借莪１个温暖的怀抱￠ 2021-12-04 02:04 328阅读 0赞

# 解决方法 #

1.  新建一个 Filter 实现 Filter 接口
2.  在doFilter() 里实现

public final void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
            HttpServletRequest httpRequest = (HttpServletRequest)request;
            HttpServletResponse httpResponse = (HttpServletResponse)response;
            //是否带cookie
            httpResponse.setHeader("Access-Control-Allow-Credentials", "true");
            //跨域
    //        httpResponse.setHeader("Access-Control-Allow-Origin", "*");
    //        httpResponse.setHeader("Access-Control-Allow-Origin", "http://localhost:3000");
    //      设置允许多个域名请求
            String[] allowDomains = {"http://localhost:3000", "http://10.10.150.194:3000", "http://localhost:8082"};
            Set allOrigins = new HashSet(Arrays.asList(allowDomains));
            String originHeader = ((HttpServletRequest) request).getHeader("Origin");
            if (allOrigins.contains(originHeader)){
                httpResponse.setHeader("Access-Control-Allow-Origin", originHeader);
            }
    //        httpResponse.setHeader("Access-Control-Allow-Origin", "http://10.10.150.194:3000");
            //请求方式
            httpResponse.setHeader("Access-Control-Allow-Methods", "POST,GET,OPTIONS,DELETE,PUT");
            //返回结果缓存
            httpResponse.setHeader("Access-Control-Max-Age", "3600");
            httpResponse.setHeader("Access-Control-Allow-Headers", "x-requested-with,Content-Type");
            httpResponse.setHeader("Content-type", "text/html;charset=UTF-8");
            request.setCharacterEncoding("UTF8");
            response.setCharacterEncoding("UTF8");
            String currentURL = httpRequest.getServletPath().replaceAll("//", "/");
            if (this.isWhiteURL(currentURL)) {
                chain.doFilter(request, response);
            } else {
                if (this.recordLog) {
                    logger.info("{}|{}", currentURL, this.formatRequestParamToJSON(httpRequest));
                }
    
                if (this.requestFilter(httpRequest, httpResponse, currentURL)) {
                    this.doFilter(httpRequest, httpResponse, chain);
                }
    
            }
        }

这里配置了多个域名访问

# Spring Boot 跨域解决 #

package com.eyelake.config;
    
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.cors.CorsConfiguration;
    import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
    import org.springframework.web.filter.CorsFilter;
    import org.springframework.web.servlet.config.annotation.CorsRegistry;
    import org.springframework.web.servlet.config.annotation.EnableWebMvc;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
    /**
     * @Author: LiangJingXing
     * @Date: 2019/8/20 15:22
     * @Decription:跨域处理
     */
    @Configuration
    @EnableWebMvc
    public class CorsConfig implements WebMvcConfigurer {
    
        private CorsConfiguration buildConfig() {
            CorsConfiguration corsConfiguration = new CorsConfiguration();
            corsConfiguration.addAllowedOrigin("*");
            corsConfiguration.addAllowedHeader("*");
            corsConfiguration.addAllowedMethod("*");
            return corsConfiguration;
        }
    
        @Bean
        public CorsFilter corsFilter() {
            UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
            source.registerCorsConfiguration("/**", buildConfig());
            return new CorsFilter(source);
        }
    
        @Override
        public void addCorsMappings(CorsRegistry registry) {
            registry.addMapping("/**")
                    .allowedOrigins("*")
                    .allowCredentials(true)
                    .allowedMethods("*")
                    .maxAge(3600);
        }
    
    }