一个JAASSubject代表一个单独的安全主体。

A JAAS Subject represents a single security principal.

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对于每个安全角色，必须声明相应的主体类及其名称。

For each security role, a corresponding principal class and its name must be declared.

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这些安全属性包括主体身份和组信息。

These security attributes are the principal identity and the group information.

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这些安全属性包括主体身份和组信息。

These security attributes are the principal identity and the group information.

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