web跨域问题的解决

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一、解决tomcat在IP 和端口不同时引起的跨域问题，解决方案，通过编写crossDomain.xml文件

二、在tomcat.6.0.27以上版本，跨域问题有简单解决方法：

在tomcat 的conf 目录下面　编辑：context.xml

将里面的Context修改为以下即可：

<ContextsessionCookiePath=""sessionCookieDomain=".×××.cn"/>

三、

1.将cors-filter-2.5.jar、java-property-utils-1.10.jar这两个jar包拷贝至tomcat的lib目录下如： C:\Program Files (x86)\apache-tomcat-8.0.23\lib;
2.在tomcat的conf（C:\Program Files (x86)\apache-tomcat-8.0.23\conf）下的web.xml中添加下面的filter:
<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>

所需资源下载链接：http://download.csdn.net/download/cpp1781089410/9550789

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