What to do if jsp mysql is garbled

In the process of using JSP and MySQL, a common problem is garbled characters. This problem usually occurs when Chinese characters are output in the JSP page, or when Chinese characters are inserted or read in the MySQL database. The following will introduce the causes and solutions of garbled characters.

Causes of garbled codes:

1. Inconsistent encoding: The encoding of the JSP page is inconsistent with the encoding of the MySQL database, which often leads to garbled codes. For example, the JSP page uses UTF-8 encoding, but the MySQL database uses GBK encoding.
2. Incorrect database character set: The default character set used by the MySQL database is the Latin character set (latin1), not the UTF-8 character set that supports Chinese. If you insert or read Chinese characters into the MySQL database, garbled characters will appear.
3. The database connection encoding method is incorrect: When JDBC connects to MySQL, the connection encoding method needs to be set. If the setting is incorrect, it will also cause garbled characters.

Solution:

1. Set the page encoding method: add , ensure that the encoding method of the JSP page is consistent with the encoding method of the MySQL database.
2. Set the character set of the MySQL database: You can set the database character set to UTF-8 by modifying the my.cnf file of MySQL. Add the following lines of code under [mysqld]:

[mysqld]
character-set-server=utf8
collation-server=utf8_general_ci

Note: Be sure Modify MySQL's existing character set related items to UTF-8 instead of directly adding the above code.

3. Set the database connection encoding method: When JDBC connects to MySQL, you need to set the connection encoding method to ensure that the encoding methods of the JSP page and the MySQL database are consistent. You can add the charset=UTF-8 parameter to the JDBC URL to set it, for example:

jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8

Summary:

When using JSP and MySQL, the problem of garbled characters often occurs, but as long as we understand the causes of garbled characters and take corresponding solutions, we can avoid the problem of garbled characters. It should be noted that if the JSP page uses UTF-8 encoding, both the database and JDBC connection should be set to UTF-8 encoding.

The above is the detailed content of What to do if jsp mysql is garbled. For more information, please follow other related articles on the PHP Chinese website!