mysql 5.5无效的转义序列java

Question

static byte[] ac = {'\\', '\'', '{', '}', '{'}; //not OK insert into tt values('\\\'{}{')
static byte[] ac = {'\\', '\'', '{', '}'}; //OK insert into tt values('\\\'{}')
static byte[] ac = {'\\', '\'', '{'}; //OK insert into tt values('\\\'{')
static byte[] ac = {'\'', '{', '}', '{'}; //OK insert into tt values('\'{}{')
static byte[] ac = {'\\', '{', '}', '{'}; //OK insert into tt values('\\{}{')

• Ubuntu system
• MySQL 5.5
• MySQL JDBC 5.1.22

I am not able to insert 5 bytes to a blob table field, the bytes are shown above. The datasource connection encoding is set to UTF-8 .

Relevant information: http://dev.mysql.com/doc/refman/5.5/en/string-literals.html

Any idea why {} is so special? it works with workbench.

For the not ok, i got the following exception:

java.sql.SQLException: Not a valid escape sequence: {')

Answer 1

This is a bug in some versions of MySQL's JDBC client (Connector/J); see http://bugs.mysql.com/bug.php?id=31457 (and other bugs linked from there). You should be able to fix it by upgrading to the latest Connector/J; alternatively, you can work around it by disabling escape-processing (by writing Statement.setEscapeProcessing(false) ).