【Java】Tomcat跨域配置

1、Tomcat 7 跨域配置

Tomcat 7 前几个版本是不支持，所以引入cors-filter-1.7.jar，java-property-utils-1.9.jar。

链接：https://pan.baidu.com/s/1UDJ1RnDx8vCAQV8pwLxQNw 
提取码：3ao1

配置项目中 web.xml

<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>

2、Tomcat8 跨域配置

修改 web.xml

<filter>
    <filter-name>CorsFilter</filter-name>
    <filter-class>org.apache.catalina.filters.CorsFilter</filter-class>
    <init-param>
        <param-name>cors.allowed.origins</param-name>
        <param-value>*</param-value>
    </init-param>
    <init-param>
        <param-name>cors.allowed.methods</param-name>
        <param-value>GET,POST,HEAD,OPTIONS,PUT,DELETE</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>CorsFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

范围

1、如果使Tomcat下所有项目都支持跨域，则修改 tomcat根目录\conf\web.xml

2、如果只是使某一个项目支持跨域，则修改此项目的web.xml文件。注意需要引入tomcat根目录\lib\catalina.jar

官方文档

注：Tomcat7后面版本也支持跨域，可以检查lib\catalina.jar中是否包含org.apache.catalina.filters.CorsFilter

Tomcat7跨域配置说明

Tomcat8跨域配置说明