使用json-lib-2.1.jar报，org.apache.struts2.json.JSONWriter can not access a member of class org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper with modifiers "public"-转载

http://blog.csdn.net/xtra6714/archive/2010/07/08/5721593.aspx

使用json-lib-2.1.jar报，org.apache.struts2.json.JSONWriter can not access a member of class org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper with modifiers "public"-转载原因：action中，有get方法，且方法返回接口类型时，报些错误。

办法：去掉相关返回接口类型的get方法；

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