IDEA 添加serialVersionUID 检查

1. 根据类名、接口名、成员方法及属性等来生成一个64位的哈希字段，例如 private static final long serialVersionUID = XXXL;

   add default serial version ID： 日后需要进行结构调整的就要手动添加，可以进行向下兼容 private static final long serialVersionUID = XXXL;
   　　Adds a default serial version ID to the selected type
   　　Use this option to add a user-defined ID in combination with custom serialization code if the type did undergo structural change since its first release.

2. 采用默认的1L，具体为private static final long serialVersionUID = 1L;

   add generated serial version ID：java 自动根据算法编译自动生成的，一旦修改类 serialVersionUID就变了，就无法反序列化回来。private static final long serialVersionUID = 1L;
   　　Adds a generated serial version ID to the selected type
   　　Use this option to add a compiler-generated ID if the type didnot undergo structural change since its first release.