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java程序向MySql中插入数据报错：alter table score change score score varchar(50) character utf8;

2018-02-01 12:44 483 查看

jdbc配置：

driverName=com.mysql.jdbc.Driver
url=jdbc\:mysql\://localhost\:3306/mobile_scm?useUnicode=true&characterEncoding=UTF-8
username=xxx
password=xxx

报错：

解决方法：

1.查看表的编码

show create table sys_menu;
+----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table    | Create Table                                                                                                                                                                                                                                                                                                                                                                                                           |
+----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| sys_menu | CREATE TABLE `sys_menu` (
`menuid` varchar(255) CHARACTER SET latin1 NOT NULL,
`menuname` varchar(255) DEFAULT NULL,
`parentid` varchar(255) CHARACTER SET latin1 DEFAULT NULL,
`actionid` varchar(255) DEFAULT NULL,
`type` tinyint(4) DEFAULT NULL,
`sortorder` tinyint(4) DEFAULT NULL,
`remark` varchar(255) CHARACTER SET latin1 DEFAULT NULL,
PRIMARY KEY (`menuid`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 |

可以看到表的编码是utf8，但是字段‘remark’的编码是latin1,修改字段remark编码

mysql> alter table sys_menu change `remark` `remark` varchar(255) character set utf8;

Query OK, 3 rows affected
Records: 3  Duplicates: 0  Warnings: 0

mysql> show create table sys_menu;
+----------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table    | Create Table                                                                                                                                                                                                                                                                                                                                                                                      |
+----------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| sys_menu | CREATE TABLE `sys_menu` (
`menuid` varchar(255) CHARACTER SET latin1 NOT NULL,
`menuname` varchar(255) DEFAULT NULL,
`parentid` varchar(255) CHARACTER SET latin1 DEFAULT NULL,
`actionid` varchar(255) DEFAULT NULL,
`type` tinyint(4) DEFAULT NULL,
`sortorder` tinyint(4) DEFAULT NULL,
`remark` varchar(255) DEFAULT NULL,
PRIMARY KEY (`menuid`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 |
+----------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set

修改成功后，再执行程序发现问题成功解决！！

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标签： mysql 乱码

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