CORS背后的基本思想是使用自定义的HTTP头部允许浏览器和服务器相互了解对方，从而决定请求或响应成功与否
在mvnrepository搜索cors-filter,目前也就两个可以用
这两个也都大同小异，因为ebay开源在github上，也有详细的README，那么就以ebay的cors-filter为例
添加依赖包到项目
<dependency>
<groupId>org.ebaysf.web</groupId>
<artifactId>cors-filter</artifactId>
<version>1.0.1</version>
</dependency>
<filter>
<filter-name>CORS Filter</filter-name>
<filter-class>org.ebaysf.web.cors.CORSFilter</filter-class>
<init-param>
<param-name>cors.allowed.origins</param-name>
<param-value>http://192.168.56.129,http://192.168.56.130</param-value>
</init-param>
<init-param>
<param-name>cors.allowed.methods</param-name>
<param-value>GET,POST,HEAD,OPTIONS,PUT</param-value>
</init-param>
<init-param>
<param-name>cors.allowed.headers</param-name>
<param-value>Content-Type,X-Requested-With,accept,Origin,Access-Control-Request-Method,Access-Control-Request-Headers</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CORS Filter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
原文：https://www.cnblogs.com/nyhhd/p/12376524.html