Spring Boot 配置跨域

第一种: 采用配置方式

@Configuration
public class WebConfigurer implements ServletContextInitializer {

      private CorsConfiguration buildConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        //  你需要跨域的地址
        // * 表示对所有的地址都可以访问
        corsConfiguration.addAllowedOrigin("*");
        //  跨域的请求头
        corsConfiguration.addAllowedHeader("*");
        //  跨域的请求方法
        corsConfiguration.addAllowedMethod("*");
        //加上了这一句，大致意思是可以携带 cookie
        //最终的结果是可以 在跨域请求的时候获取同一个 session
        corsConfiguration.setAllowCredentials(true);
        return corsConfiguration;
    }

    /**
     * 跨域设置
     * @return corsFilter
     */
    @Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        log.debug("Registering CORS filter");
        //配置 可以访问的地址
        source.registerCorsConfiguration("/api/**", buildConfig());
        source.registerCorsConfiguration("/*/api/**", buildConfig());
        return new CorsFilter(source);
    }

}

第二种: 配置文件+配置类

application.yml配置文件

jhipster:
  cors:
    allowed-origins: '*'
    allowed-methods: '*'
    allowed-headers: '*'
    exposed-headers: 'Authorization,Link,X-Total-Count'
    allow-credentials: true
    max-age: 1800

配置类

@Configuration
public class WebConfigurer implements ServletContextInitializer {

    private final Logger log = LoggerFactory.getLogger(WebConfigurer.class);

    private final Environment env;

    private final JHipsterProperties jHipsterProperties;

    public WebConfigurer(Environment env, JHipsterProperties jHipsterProperties) {
        this.env = env;
        this.jHipsterProperties = jHipsterProperties;
    }

    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        if (env.getActiveProfiles().length != 0) {
            log.info("Web application configuration, using profiles: {}", (Object[]) env.getActiveProfiles());
        }

        log.info("Web application fully configured");
    }

    @Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        CorsConfiguration config = jHipsterProperties.getCors();
        if (config.getAllowedOrigins() != null && !config.getAllowedOrigins().isEmpty()) {
            log.debug("Registering CORS filter");
            source.registerCorsConfiguration("/api/**", config);
            source.registerCorsConfiguration("/**", config);
        }
        return new CorsFilter(source);
    }

}