1.后台添加过滤器，允许跨域
@Configuration
public class GlobalCorsConfig {
@Bean
public CorsFilter corsFilter() {
CorsConfiguration corsConfiguration = new CorsConfiguration();
corsConfiguration.addAllowedOrigin("");
corsConfiguration.addAllowedHeader("");
corsConfiguration.addAllowedMethod("*");

    UrlBasedCorsConfigurationSource configSource = new UrlBasedCorsConfigurationSource();
    configSource.registerCorsConfiguration("/**", corsConfiguration);

    return new CorsFilter(configSource);
}

}

2.前台
在config的index.js的proxyTable中加入拦截，拦截/api请求，替换成target中的请求，
比如原始请求是/api/hello.pub，则会替换成http://192.168.33.104:8086/hello.pub。
proxyTable: {
'/api':{
target: 'http://192.168.33.104:8086',
changeOrigin:true,
pathRewrite:{
'^/api':''
}
}
},