Tomcat配置web.xml解决跨域问题

在tomcat的conf目录web.xml中 配置以下代码

 <filter>
        <filter-name>CORS</filter-name>
        <filter-class>com.thetransactioncompany.cors.CORSFilter</filter-class>
        <init-param>
            <param-name>cors.allowOrigin</param-name>
            <param-value>*</param-value>
        </init-param>
        <init-param>
            <param-name>cors.supportedMethods</param-name>
            <param-value>GET,POST,Options</param-value> 
        </init-param>
        <init-param>
            <param-name>cors.supportsCredentials</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CORS</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping> 

下载所需的jar包

下载完放在tomcat/lib的目录下

点此下载web.xml配置中所需要的jar
https://download.youkuaiyun.com/download/amenghui/13199958