license机制有以下的主要功能点：



Ø 应用程序可以创建以及验证绑定给用户、系统等实体的license。



Ø 防止用户随意拷贝软件和license。



Ø licenses可以是永久性的或者临时性的（在某个特定时期内有效）



Ø licenses的验证由JAVA Security API提供的数字签名机制来实现。



Ø license安装模块需要用特殊机制对其进行保护，以防被反编译轻易破解。



-The license mechanism has the following main points:



Ø　application can create and verify is bound to users, systems, and other entities license.



O prevent the user free to copy the software and the license.



Ø　licenses can be permanent or temporary (valid in a specific period of time)



Ø　licenses validation digital signature mechanisms provided by the JAVA the Security API.



O the license installation module with a special mechanism for their protection, to prevent them from being decompiled easily crack.