后端Java关于跨域的几种解决方法

 

本人遇到的跨域问题，解决方式还有nginx代理，配置拦截器，ajax的jsonp,jQuery的jsonp插件等，技术有限，遇到了会继续更新

1.在接口名上添加注解

@GetMapping("/student/pdf1")
@CrossOrigin(origins = "*", allowCredentials = "true", allowedHeaders = "", methods = {})
public synchronized void studentPdf1(@RequestParam String string)  {

  }

2.在接口内添加

 @GetMapping("/student/pdf1")public synchronized SignEntity studentPdf1(@RequestParam String string,HttpServletResponse response)  {
 response.setHeader("Access-Control-Allow-Origin", "*");
 response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
 response.setHeader("Access-Control-Max-Age", "3600");
 response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
 System.out.println(response.getStatus());
}

3.实现addCorsMappings

@Configuration
public class WebConfig implements WebMvcConfigurer {
    @Override
    public void configurePathMatch(PathMatchConfigurer configurer) {

    }

    @Override
    public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {

    }

    @Override
    public void configureAsyncSupport(AsyncSupportConfigurer configurer) {

    }

    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {

    }

    @Override
    public void addFormatters(FormatterRegistry registry) {

    }

    @Override
    public void addInterceptors(InterceptorRegistry registry) {

    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {

    }


    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOrigins("*")
                .allowCredentials(true)
                .allowedMethods("POST, GET, OPTIONS, DELETE")
                .maxAge(3600 * 24);

    }

    @Override
    public void addViewControllers(ViewControllerRegistry registry) {

    }

    @Override
    public void configureViewResolvers(ViewResolverRegistry registry) {

    }

    @Override
    public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {

    }

    @Override
    public void addReturnValueHandlers(List<HandlerMethodReturnValueHandler> returnValueHandlers) {

    }

    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {

    }

    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {

    }

    @Override
    public void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {

    }

    @Override
    public void extendHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {

    }

    @Override
    public Validator getValidator() {
        return null;
    }

    @Override
    public MessageCodesResolver getMessageCodesResolver() {
        return null;
    }
}

4.Cors

 @Bean
    public CorsFilter corsFilter() {
        final UrlBasedCorsConfigurationSource urlBasedCorsConfigurationSource = new UrlBasedCorsConfigurationSource();
        final CorsConfiguration corsConfiguration = new CorsConfiguration();
        /*是否允许请求带有验证信息*/
        corsConfiguration.setAllowCredentials(true);
        /*允许访问的客户端域名*/
        corsConfiguration.addAllowedOrigin("*");
        /*允许服务端访问的客户端请求头*/
        corsConfiguration.addAllowedHeader("*");
        /*允许访问的方法名,GET POST等*/
        corsConfiguration.addAllowedMethod("*");
        urlBasedCorsConfigurationSource.registerCorsConfiguration("/**", corsConfiguration);
        return new CorsFilter(urlBasedCorsConfigurationSource);
    }

如有补充，执经叩问；