第一步：导入jar包
cors-filter-1.7.jar、java-property-utils-1.9.jar
下载地址：http://pan.baidu.com/s/1pLkLPGJ
第二步：在web.xml文件配置
<filter>
<filter-name>CORS</filter-name>
<filter-class>com.thetransactioncompany.cors.CORSFilter</filter-class>
<init-param>
<param-name>cors.allowOrigin</param-name> <!--配置授信的白名单的域名！ -->
<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>
