The problem of Chinese garbled characters appearing when connecting to MySQL database in Idea

Problem: When using JDBC to connect to the MySQL database, garbled characters are displayed when inserting Chinese characters Solution: Insert the following code into the connection code

String url = "jdbc:mysql://localhost:3306/your database name?useUnicode=true&characterEncoding=utf8&serverTimezone=UTC&useSSL=false";

Code Interpretation

useUnicode=true&characterEncoding=utf8

The above code has two effects:
1. When storing data:
When storing project data, the database will first decode the data into bytecode using the UTF-8 format, and then store the decoded bytecode back into the database using the GBK encoding.

2. When fetching data:
When retrieving data from the database, the database will first decode the data in the database into bytecode in GBK format, then re-encode the decoded bytecode in UTF-8 format, and finally return the data to the client.

serverTimezone=UTC

The above code is to specify the time zone. After adding this code, the time zone error will not be reported.

useSSL=false

For higher versions of MySQL, you need to specify whether to use an SSL connection.

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