将UUID存储在mysql数据库表中

Question

I am facing a peculiar problem while storing UUID to mysql table. I have a table with a column declaration :

    expenseUUID varchar(32) primary key ,

in this column I wish to save UUID. I have generated UUID as follows:

  String expenseUUID = UUID.randomUUID().toString();
  expenseUUID.replaceAll("-", "");

But when I try to insert expenseUUID using JDBC , I get an error saying :

Data truncation: Data too long for column 'expenseUUID' 

What should I do resolve this issue? I am stuck. I am not able to figure out what is going wrong.

Answer 1

You just missed to reassign your replaceAll result to expenseUUID var. Then your var still contains a 36 chars string.

Current :

String expenseUUID = UUID.randomUUID().toString();
expenseUUID.replaceAll("-", "");
System.out.print(expenseUUID); // 9e73f8a4-dfde-438e-9eec-ac4e94817b6b

Corrected :

String expenseUUID = UUID.randomUUID().toString();
expenseUUID = expenseUUID.replaceAll("-", "");
System.out.print(expenseUUID); // 0757c2666e934e2eb303df68bb3c9761