Tomcat下 解决Ajax请求跨域的问题

在项目中引用cors-filter-1.5.0.1.jar和java-property-utils-1.9.1.jar两个jar包

在WEB-INF下的web.xml中加入下面代码：

<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, HEAD, PUT, DELETE</param-value>
  </init-param>
  <init-param>
   <param-name>cors.supportedHeaders</param-name>
   <param-value>Accept, Origin, X-Requested-With, Content-Type, Last-Modified</param-value>
  </init-param>
  <init-param>
   <param-name>cors.exposedHeaders</param-name>
   <param-value>Set-Cookie</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>

重启Tomcat即可