[英]how to get list of Databases "Schema" names of MySql using java JDBC
如何使用java JDBC獲取MySql的數據庫“架構”名稱列表?
DatabaseMetaData 的getSchemas()
方法是顯而易見的,但是對於 MySQL,您必須使用getCatalogs()
http://download.oracle.com/javase/7/docs/api/java/sql/DatabaseMetaData.html#getSchemas() http://download.oracle.com/javase/7/docs/api/java/sql /DatabaseMetaData.html#getCatalogs()
例子:
Class.forName("com.mysql.jdbc.Driver");
// change user and password as you need it
Connection con = DriverManager.getConnection (connectionURL, "user", "password");
ResultSet rs = con.getMetaData().getCatalogs();
while (rs.next()) {
System.out.println("TABLE_CAT = " + rs.getString("TABLE_CAT") );
}
SHOW DATABASES
查看它是否在里面,USE DATABASE;
並捕獲錯誤。DatabaseMetaData meta = conn.getMetaData();
ResultSet schemas = meta.getSchemas();
while (schemas.next()) {
String tableSchema = schemas.getString(1); // "TABLE_SCHEM"
String tableCatalog = schemas.getString(2); //"TABLE_CATALOG"
System.out.println("tableSchema "+tableSchema);
}
DatabaseMetaData dbmd = con.getMetaData();
ResultSet ctlgs = dbmd.getCatalogs();
while(ctlgs.next())
{
System.out.println("ctlgs = "+ctlgs.getString(1));
}
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