前后台对接springboot跨域支持

@Component
public  class CorsFilter   {
	/**
	 *    跨域支持
	 */
	@Bean
	public WebMvcConfigurer corsConfigurer() {
		return new WebMvcConfigurer() {
			@Override
			public void addCorsMappings(CorsRegistry registry) {
				registry.addMapping("/**").allowedMethods("*");
			}
		};
	}
}

html前台加入

最上面加入
<!--[if lt IE 9]>
		<script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
		<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
		<![endif]-->





最下面加入
<!--[if lte IE 9]>
		<script src="//cdn.bootcss.com/jquery-ajaxtransport-xdomainrequest/1.0.3/jquery.xdomainrequest.min.js" type="text/javascript" charset="utf-8"></script>
		<![endif]-->