cors跨域请求配置access-control-allow-origin：无效解决方案

cors跨域请求配置access-control-allow-origin：无效解决方案Cors跨域请求，配置Access-Control-Allow-Origin：""，无效解决方案由于应用需要跨域请求数据，博主在JDK8、Tomcat7.0的cors可以配置Access-Control-Allow-Origin：*，但是我按照文档配置以后却没有生效，一度怀疑是tomcat或者jdk的问题，最后想起来web.xml是按照从前往后的顺序加载的。解决方案：是filter位置的问题，你把整个放到第一个filter的位置就可以了。给出web.xml:<?xmlversion=1.0encoding=UTF-8?><web-appid=WebApp_IDversion=2.4xmlns=:xsi=:schemaLocation=://:spring/spring-*.xml</param-value></context-param><listener><context-param><param-name>webAppRootKey</param-name><param-value>och.root</param-value></context-param><listener-class>org.springframework.web.util.Log4jConfigListener</listener-class></listener><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><!--启用Spring的scope='request'--><listener><listener-class>org.springframework.web.context.request.RequestContextListener</listener-class></listener><!--CORSFilter--><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><filter><filter-name>characterEncodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>UTF-8</param-value></init-param><init-param><param-name>ForceEncoding</param-name><param-value>true</param-value></init-param></filter><filter-mapping><filter-name>characterEncodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><filter><filter-name>control</filter-name><filter-class>com.cmos.core.filter.IControlRequestFilt<init-param><param-name>controlRequestImpl</param-name><param-value>com.cmos.och.control.impl.ControlRequestImpl</param-value></init-param><init-param><param-name>controlFilePath</param-name><param-value>config/control.xml</param-value></init-param><init-param><!--Internationalizationconfig--><param-name>locale</param-name><param-value>zh_CN</param-value></init-param><filter-mapping><filter-name>control</filter-name><url-pattern>/front/*</url-pattern></filter-mapping><filter><filter-name>struts2</filter-name><filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class></filter><filter-mapping><filter-name>struts2</filter-name><url-pattern>/front/*</url-pattern></filter-mapping></web-app>