How to solve golang mysql garbled code

Golang is an open source programming language. Its emergence has given many programmers another choice. MySQL is a well-known relational database management system, and many Golang programmers use MySQL as a data storage solution. However, due to differences in character sets and other aspects, many developers will encounter the problem of garbled characters when Golang interacts with MySQL.

So, how to solve the problem of garbled characters when Golang interacts with MySQL? Here are a few possible solutions.

1. Set the character set

The default character set of MySQL database is utf8mb4, while the default character set of Golang is utf8. When the character sets on both sides are inconsistent, garbled characters will appear. Therefore, we can specify the character set as utf8mb4 when connecting to MySQL, as shown below:

db, err := sql.Open("mysql", "user:password@tcp(127.0.0.1:3306)/database?charset=utf8mb4")

This ensures that Golang and MySQL use the same character set. It should be noted that the character set also needs to be set to utf8mb4 when creating the database.

2. Use the default value of utf8mb4 character set

The default value of utf8mb4 character set is utf8mb4_general_ci, not utf8mb4_bin. When we do not specify a character set or use the default character set when creating a table or field, MySQL will use utf8mb4_general_ci as the default value. utf8mb4_general_ci is a comparison method based on the Unicode character set. It is case-insensitive and accent-insensitive, making it more convenient when processing text data.

Therefore, we can use the default value directly without specifying the character set when creating a table or field to avoid garbled characters. As shown below:

CREATE TABLE user (
  name varchar(50) NOT NULL,
  age int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

3. Use the character set conversion function

When we use different character sets, we can use the character set conversion function provided by MySQL to convert text in different character sets . Among them, the most commonly used functions are CONVERT() and CAST().

• CONVERT() function can convert a string from one character set to another character set. The syntax is as follows:

CONVERT(str USING charset)

Among them, str is to be converted string, charset is the target character set.

For example, to convert a string in the utf8 character set to a string in the gbk character set, you can use the following statement:

SELECT CONVERT('你好',CHARACTER SET gbk);

• The CAST() function can also convert a string from To convert one character set to another, the syntax is as follows:

CAST(str AS character_type CHARACTER SET charset)

Among them, str is the string to be converted, character_type is the target data type, and charset is the target character set.

For example, to convert the field name of the varchar type utf8 character set to a field of the gbk character set, you can use the following statement:

SELECT CAST(name AS char(20) CHARACTER SET gb2312) FROM user;

By using the character set conversion function, we can use Golang with Solve the problem of garbled characters when interacting with MySQL.

The above are several possible ways to solve the garbled problem when Golang interacts with MySQL. In actual development, you need to choose the appropriate solution according to the specific situation. I hope this article can help Golang programmers solve the problem of garbled characters.

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