Systemoutprintln获取数据库名称：+metaDatagetDatabaseProductName; Systemoutprintln获取数据库版本号：+metaDatagetDatabaseProductVersion; Systemoutprintln获取数据库用户名：+metaDatagetUserName; Systemoutprint

The code provided is Java code that uses the JDBC API to retrieve metadata about a database connection. Here's what each line does:

1. System.out.println("获取数据库名称："+metaData.getDatabaseProductName());

   • Prints the name of the connected database.

2. System.out.println("获取数据库版本号："+metaData.getDatabaseProductVersion());

   • Prints the version number of the connected database.

3. System.out.println("获取数据库用户名："+metaData.getUserName());

   • Prints the username used to connect to the database.

4. System.out.println("获取数据链接："+metaData.getURL());

   • Prints the URL of the database connection.

5. System.out.println("查询数据库是否支持可读："+metaData.isReadOnly());

   • Prints whether the connected database supports read operations.

6. System.out.println("查询数据库是否支持事务："+metaData.supportsTransactions());

   • Prints whether the connected database supports transactions.

Note: In the code snippet, metaData refers to an instance of java.sql.DatabaseMetaData, which is obtained from a java.sql.Connection object