后台使用的是 Spring MVC RESTful + 前台 ExtJs4 REST数据代理，交互格式是JSON，使用Jackson进行数据解析。现在出现的问题是后台只能接受类似下面的纯Json数据： { usernam:"yokoboy", nation:{ id:1 } } 类似这种这种数据格...

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