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MySQL会出现中文乱码问题怎么办

发布时间:2020-07-07 13:49:08 来源:亿速云 阅读:158 作者:清晨 栏目:MySQL数据库

小编给大家分享一下MySQL会出现中文乱码问题怎么办,希望大家阅读完这篇文章后大所收获,下面让我们一起去探讨吧!

1、MySQL会出现中文乱码的原因
当我们在使用MySQL数据库的时候,经常会碰到乱码的问题,看下面的代码。

    mysql> create table test(id int,name varchar(10));
Query OK, 0 rows affected (0.01 sec)

    mysql> insert into test values(1,'宋蔚然');
    ERROR 1366 (HY000): Incorrect string value: '\xE5\xAE\x8B\xE8\x94\x9A...' for column 'name' at row 1
    mysql>

相关学习推荐:mysql视频教程

很显然,当插入中文的时候报错,原因在哪呢?

    mysql> show variables like '%CHARACTER%';
    +--------------------------+----------------------------+
    | Variable_name            | Value                      |
    +--------------------------+----------------------------+
    | character_set_client     | utf8                       |
    | character_set_connection | utf8                       |
    | character_set_database   | latin1                     |
    | character_set_filesystem | binary                     |
    | character_set_results    | utf8                       |
    | character_set_server     | latin1                     |
    | character_set_system     | utf8                       |
    | character_sets_dir       | /usr/share/mysql/charsets/ |
    +--------------------------+----------------------------+

character_set_client 客户端使用的字符编码
character_set_connection 数据库链接使用的编码
character_set_database 数据库使用的字符编码
原来是字符编码与服务端、数据库的编码不统一而造成的。

2、MySQL会出现中文乱码的解决方法
方法一:设置names

    mysql> set names latin1;
    
    mysql> set names latin1;
    Query OK, 0 rows affected (0.00 sec)
    
    mysql> select * from test;
    Empty set (0.00 sec)
    
    mysql> insert into test values(1,'宋蔚然');
    Query OK, 1 row affected (0.01 sec)
    
    mysql> select * from test;
    +------+-----------+
    | id   | name      |
    +------+-----------+
    |    1 | 宋蔚然    |
    +------+-----------+
    1 row in set (0.00 sec)

再来看一下字符集的设置

     mysql> show variables like '%CHARACTER%';
    +--------------------------+----------------------------+
    | Variable_name            | Value                      |
    +--------------------------+----------------------------+
    | character_set_client     | latin1                     |
    | character_set_connection | latin1                     |
    | character_set_database   | latin1                     |
    | character_set_filesystem | binary                     |
    | character_set_results    | latin1                     |
    | character_set_server     | latin1                     |
    | character_set_system     | utf8                       |
    | character_sets_dir       | /usr/share/mysql/charsets/ |
    +--------------------------+----------------------------+

字符编码统一就不会出现乱码。
解决乱码问题其实就是将客户端的字符编码与服务端、数据库的编码统一。这里的服务端与数据库编码都是latin1,所有set names latin1即可临时解决乱码问题。

方法二:修改数据库配置文件字符集为UTF8
UTF8支持很多语言体系,因此在生产中强烈建议将字符编码设置UTF8。打开数据库的配置文件,分别在[client],[mysql],[mysqld]下添加如下内容。

    #vi /mysql/data/3306/my.cnf
    
    [client]
    default-character-set=utf8
    
    [mysql]
    default-character-set=utf8
    
    [mysqld]
    default-storage-engine=INNODB
    character-set-server=utf8
    collation-server=utf8_general_ci

重启数据库

   [root@test ~]# systemctl restart mysqld

重写创建库和表

    mysql> create database test;
    Query OK, 1 row affected (0.00 sec)
    
    mysql> use test;
    Database changed
    mysql> create table test(id int,name varchar(10));
    Query OK, 0 rows affected (0.02 sec)
    
    mysql> insert into test values(1,'宋蔚然');
    Query OK, 1 row affected (0.00 sec)
    
    mysql> select * from test;
    +------+-----------+
    | id   | name      |
    +------+-----------+
    |    1 | 宋蔚然    |
    +------+-----------+
    1 row in set (0.00 sec)

再来看一下字符集的设置

    mysql> show variables like '%CHARACTER%';
    +--------------------------+----------------------------+
    | Variable_name            | Value                      |
    +--------------------------+----------------------------+
    | character_set_client     | utf8                       |
    | character_set_connection | utf8                       |
    | character_set_database   | utf8                       |
    | character_set_filesystem | binary                     |
    | character_set_results    | utf8                       |
    | character_set_server     | utf8                       |
    | character_set_system     | utf8                       |
    | character_sets_dir       | /usr/share/mysql/charsets/ |
    +--------------------------+----------------------------+

undefined

1、MySQL会出现中文乱码的原因
当我们在使用MySQL数据库的时候,经常会碰到乱码的问题,看下面的代码。

    mysql> create table test(id int,name varchar(10));
Query OK, 0 rows affected (0.01 sec)

    mysql> insert into test values(1,'宋蔚然');
    ERROR 1366 (HY000): Incorrect string value: '\xE5\xAE\x8B\xE8\x94\x9A...' for column 'name' at row 1
    mysql>

很显然,当插入中文的时候报错,原因在哪呢?

    mysql> show variables like '%CHARACTER%';
    +--------------------------+----------------------------+
    | Variable_name            | Value                      |
    +--------------------------+----------------------------+
    | character_set_client     | utf8                       |
    | character_set_connection | utf8                       |
    | character_set_database   | latin1                     |
    | character_set_filesystem | binary                     |
    | character_set_results    | utf8                       |
    | character_set_server     | latin1                     |
    | character_set_system     | utf8                       |
    | character_sets_dir       | /usr/share/mysql/charsets/ |
    +--------------------------+----------------------------+

character_set_client 客户端使用的字符编码
character_set_connection 数据库链接使用的编码
character_set_database 数据库使用的字符编码
原来是字符编码与服务端、数据库的编码不统一而造成的。

2、MySQL会出现中文乱码的解决方法
方法一:设置names

    mysql> set names latin1;
    
    mysql> set names latin1;
    Query OK, 0 rows affected (0.00 sec)
    
    mysql> select * from test;
    Empty set (0.00 sec)
    
    mysql> insert into test values(1,'宋蔚然');
    Query OK, 1 row affected (0.01 sec)
    
    mysql> select * from test;
    +------+-----------+
    | id   | name      |
    +------+-----------+
    |    1 | 宋蔚然    |
    +------+-----------+
    1 row in set (0.00 sec)

再来看一下字符集的设置

     mysql> show variables like '%CHARACTER%';
    +--------------------------+----------------------------+
    | Variable_name            | Value                      |
    +--------------------------+----------------------------+
    | character_set_client     | latin1                     |
    | character_set_connection | latin1                     |
    | character_set_database   | latin1                     |
    | character_set_filesystem | binary                     |
    | character_set_results    | latin1                     |
    | character_set_server     | latin1                     |
    | character_set_system     | utf8                       |
    | character_sets_dir       | /usr/share/mysql/charsets/ |
    +--------------------------+----------------------------+

字符编码统一就不会出现乱码。
解决乱码问题其实就是将客户端的字符编码与服务端、数据库的编码统一。这里的服务端与数据库编码都是latin1,所有set names latin1即可临时解决乱码问题。

方法二:修改数据库配置文件字符集为UTF8
UTF8支持很多语言体系,因此在生产中强烈建议将字符编码设置UTF8。打开数据库的配置文件,分别在[client],[mysql],[mysqld]下添加如下内容。

    #vi /mysql/data/3306/my.cnf
    
    [client]
    default-character-set=utf8
    
    [mysql]
    default-character-set=utf8
    
    [mysqld]
    default-storage-engine=INNODB
    character-set-server=utf8
    collation-server=utf8_general_ci

重启数据库

   [root@test ~]# systemctl restart mysqld

重写创建库和表

    mysql> create database test;
    Query OK, 1 row affected (0.00 sec)
    
    mysql> use test;
    Database changed
    mysql> create table test(id int,name varchar(10));
    Query OK, 0 rows affected (0.02 sec)
    
    mysql> insert into test values(1,'宋蔚然');
    Query OK, 1 row affected (0.00 sec)
    
    mysql> select * from test;
    +------+-----------+
    | id   | name      |
    +------+-----------+
    |    1 | 宋蔚然    |
    +------+-----------+
    1 row in set (0.00 sec)

再来看一下字符集的设置

    mysql> show variables like '%CHARACTER%';
    +--------------------------+----------------------------+
    | Variable_name            | Value                      |
    +--------------------------+----------------------------+
    | character_set_client     | utf8                       |
    | character_set_connection | utf8                       |
    | character_set_database   | utf8                       |
    | character_set_filesystem | binary                     |
    | character_set_results    | utf8                       |
    | character_set_server     | utf8                       |
    | character_set_system     | utf8                       |
    | character_sets_dir       | /usr/share/mysql/charsets/ |
    +--------------------------+----------------------------+

看完了这篇文章,相信你对MySQL会出现中文乱码问题怎么办有了一定的了解,想了解更多相关知识,欢迎关注亿速云行业资讯频道,感谢各位的阅读!

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