如何创建,转换UUID[CL_SYSTEM_UUID]

UUID含义是通用唯一识别码 (Universally Unique Identifier)，通俗一点就是一个不重复的字符串，有时会把UUID作为数据库的一个主键，这样就不用担心主键重复的问题。

SAP中有个专门生成CL_SYSTEM_UUID，提供了4个静态方法创建生成不同类型的UUID：2进制，16进制，64位以及32位uuid。

也可以进行不同类型UUID之间的相互转换。

代码：

REPORT ztest_uuid.

DATA:l_uuid22 TYPE sysuuid_c22,
     l_uuid32 TYPE sysuuid_c32,
     l_uuid26 TYPE sysuuid_c26,
     l_uuid16 TYPE sysuuid_x16.

TRY.
    CALL METHOD cl_system_uuid=>if_system_uuid_static~create_uuid_x16
      RECEIVING
        uuid = l_uuid16.
  CATCH cx_uuid_error .
ENDTRY.
TRY.
    CALL METHOD cl_system_uuid=>if_system_uuid_static~create_uuid_c22
      RECEIVING
        uuid = l_uuid22.
  CATCH cx_uuid_error .
ENDTRY.
TRY.
    CALL METHOD cl_system_uuid=>if_system_uuid_static~create_uuid_c32
      RECEIVING
        uuid = l_uuid32.
  CATCH cx_uuid_error .
ENDTRY.
TRY.
    CALL METHOD cl_system_uuid=>if_system_uuid_static~create_uuid_c26
      RECEIVING
        uuid = l_uuid26.
  CATCH cx_uuid_error .
ENDTRY.

WRITE:  `Binary Format UUID:`,l_uuid16.
WRITE:/ `Base64 UUID:       `,l_uuid22.
WRITE:/ `Base32 UUID:       `,l_uuid26.
WRITE:/ `Hex Format UUID:   `,l_uuid32.

运行结果：

也可以通过函数SYSTEM_UUID_CREATE来生成UUID，SE37

看一下代码，其中也是调用类CL_SYSTEM_UUID创建的二进制类型UUID

以上。