前端 跨域

web.xml文件中，写在第一个filter上面
<filter>
<filter-name>CORS</filter-name>
<filter-class>com.thetransactioncompany.cors.CORSFilter</filter-class>

<init-param>
<param-name>cors.allowGenericHttpRequests</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>cors.allowOrigin</param-name>
<param-value>*</param-value>
</init-param>
<init-param>
<param-name>cors.allowSubdomains</param-name>
<param-value>false</param-value>
</init-param>
<init-param>
<param-name>cors.supportedMethods</param-name>
<param-value>GET,HEAD,POST,OPTIONS</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></param-value>
</init-param>
<init-param>
<param-name>cors.suppertsCredentials</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>cors.maxAge</param-name>
<param-value>3600</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CORS</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

pom文件
<dependency>
<groupId>com.thetransactioncompany</groupId>
<artifactId>cors-filter</artifactId>
<version>2.6</version>
</dependency>

<dependency>
<groupId>com.thetransactioncompany</groupId>
<artifactId>java-property-utils</artifactId>
<version>1.9</version>
</dependency>
</dependencies>

下载jar 包 ： cors-filter-1.7.jar