WebSphere Application Server使用Binding文件完成该项任务，该规范没有详细说明已经注释了的定义角色如何映射到用户以及组。
WebSphere Application Server does this with Binding files; the specification does not define how an annotated defined role maps to users or groups.
没有加上详细注释，不过绝对可以运行，j2sdk1 . 4下通过。
Notes without adding details, but can definitely run through j2sdk1.4.
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