springboot配置允許跨域訪問

因springboot框架通常用於前后端分離項目，因此需配置后台允許跨域訪問（具體看注釋），配置類如下，將該類加入工程中即可。

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;
/**
 * 
 * Create on 2017年7月6日下午8:05:19
 * All right reserved
 */
@Configuration
public class CorsConfig {
    private CorsConfiguration buildConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.addAllowedOrigin("*"); //允許任何域名
        corsConfiguration.addAllowedHeader("*"); //允許任何頭
        corsConfiguration.addAllowedMethod("*"); //允許任何方法
        return corsConfiguration;
    }
 
    @Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", buildConfig()); //注冊
        return new CorsFilter(source);
    }
}