jbpm部署流程定义到MySql报乱码解决方案

 

问题起因:

我在使用ant将流程定义和流程相关资源部署到JBPM数据库中的时候,报了下面一个错误。

 

错误提示,大概是:
11:33:40,781 ERROR JDBCExceptionReporter:101 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'EQT??u_??????~?<?q_U?<}?~ü?v??ì??‘??R?L\0\0?àvféb|o?r?ê??ù*??ìy?~?Séj÷ §?’L6' at line 1
jbpm org.hibernate.exception.SQLGrammarException: Could not execute JDBC batch update
 at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:90)
 at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
 at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:275)
 at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:114)
 at .................

很明显是hibernate执行更新数据库的时候sql语句出了问题!乱码!我的jbpm配置与数据库编码不一致,导致发sql语句的时候出现乱码。本来以为很简单,改一下数据库编码就可以了,结果走了很多弯路,先把正确方案总结如下。

看解决方案:


1、关闭MySql服务

2、在Mysql的安装目录下,在my.ini中添加红色部分:
[client]
default-character-set=utf8
port=3306

[mysql]

default-character-set=utf8
# SERVER SECTION
# ----------------------------------------------------------------------
#
# The following options will be read by the MySQL Server. Make sure that
# you have installed the server correctly (see above) so it reads this
# file.
#
[mysqld]

default-character-set=utf8
# The TCP/IP Port the MySQL Server will listen on
port=3306

 

3、重新启动Mysql服务

4、查看编码方式是否已经修改:

打开Mysql控制台:
mysql> show variables like 'char%';
+--------------------------+---------------------------------------------------------------+
| Variable_name            | Value                                                         |
+--------------------------+---------------------------------------------------------------+
| character_set_client     | utf8                                                          |
| character_set_connection | utf8                                                          |
| character_set_database   | gbk                                                           |
| character_set_filesystem | binary                                                        |
| character_set_results    | utf8                                                          |
| character_set_server     | utf8                                                          |
| character_set_system     | utf8                                                          |
| character_sets_dir       | C:\Program Files (x86)\MySQL\MySQL Server 5.0\share\charsets\ |
+--------------------------+---------------------------------------------------------------+

这样以后所有新建的数据库都将采用utf-8编码。

注:
1、在修改my.ini的过程中,可能会因为操作不当,导致Mysql服务不能启动,所以操作前先备份。

2、如果启动Mysql服务报windows 无法启动MySQL服务(位于 本地计算机 上)。错误10067

那么,参照下面解决方案:

新建my.ini
my.ini内容为:
[client]
default-character-set=utf8
port=3306

[mysql]
default-character-set=utf8

[mysqld]
port=3306

#Path to installation directory. All paths are usually resolved relative to this.
basedir="C:/Program Files (x86)/MySQL/MySQL Server 5.0/"

#Path to the database root
datadir="C:/Program Files (x86)/MySQL/MySQL Server 5.0/Data/"

# The default character set that will be used when a new schema or table is
# created and no character set is defined
default-character-set=utf8

# The default storage engine that will be used when create new tables when
default-storage-engine=INNODB

# Set the SQL mode to strict
sql-mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"
max_connections=100
query_cache_size=0
table_cache=256
tmp_table_size=5M
thread_cache_size=8
myisam_max_sort_file_size=100G
myisam_max_extra_sort_file_size=100G
myisam_sort_buffer_size=8M
key_buffer_size=8M
read_buffer_size=64K
read_rnd_buffer_size=256K
sort_buffer_size=212K
innodb_data_home_dir="C:/MySQL Datafiles/"
innodb_additional_mem_pool_size=2M
innodb_flush_log_at_trx_commit=1
innodb_log_buffer_size=1M
innodb_buffer_pool_size=8M
innodb_log_file_size=10M
innodb_thread_concurrency=8

 

#注:
#注意红色部分要根据你自己的安装目录进行设定。


将该文件复制到mysql安装目录中和系统的windows目录中。如果原来存在,替换掉原来的。启动MySql服务即可!

 

忽然想到自己的Linux服务器上的MySql也不完全是utf8编码的,那怎么改呢?大致思路和在windows下是一样的。

1、中止MySQL服务(bin/mysqladmin -u root shutdown)

2、在/etc/下找到my.cnf,如果没有,就把MySQL的安装目录下的support-files目录下的
my-medium.cnf复制到/etc/下并改名为my.cnf即可

3、打开my.cnf以后,在[client]和[mysqld]下面均加上default-character-set=utf8,
保存并关闭

4、启动MySQL服务(bin/mysqld_safe &) 
 

总结:

这样的修改一劳永逸,非常简单,今后MySQL一切相关的默认编码均为UTF-8了,创建新表的时候无需再次设置。如果MySql还没有安装,那么建议在安装Mysql的时候,就将默认编码设置为utf8,我们的项目中也应该将编码设置为utf8,这样后续会规避很多问题。需要注意的是,当前数据库中已经存在的数据仍保留现有的编码方式,因此需要自行转码,

方法在网上有很多,不再赘述。

 

 

 

你可能感兴趣的:(mysql)