lab4

代码说明：

  1.定义学生Bean,按照JavaBean设计规范，命名get和set方法. 2. Bean的定制事件验证实验 3. Bean属性的绑定属性验证实验 4. Bean属性的约束属性验证实验 *5.BeanInfo类 (1 Definitions students Bean, in accordance with the design specifications JavaBean naming get and set methods. 2. Bean custom event validation experiments 3 binding properties Bean attribute verification experiment 4 Constraints property validation experiments Bean property * 5.BeanInfo class)