如何使用JDBC从数据库中获取所有表名？
您可以使用SHOWTABLES查询获取MySQL当前数据库中的表列表。
Show tables;
以下JDBC程序通过执行showtable查询来检索数据库中的表列表。
示例
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class ListingTables {
public static void main(String args[]) throws Exception {
//注册驱动程序
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
//获得连接
String mysqlUrl = "jdbc:mysql://localhost/mydatabase";
Connection con = DriverManager.getConnection(mysqlUrl, "root", "password");
System.out.println("Connection established......");
//创建一个Statement对象
Statement stmt = con.createStatement();
//检索数据
ResultSet rs = stmt.executeQuery("Show tables");
System.out.println("Tables in the current database: ");
while(rs.next()) {
System.out.print(rs.getString(1));
System.out.println();
}
}
}输出结果
Connection established...... cricketers_data customers dispatches_data employee_data myplayers sales test tutorials_data
或者，您可以使用DatabaseMetaData接口的 getTables() 方法。
示例
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class RS_getTables {
public static void main(String args[]) throws Exception {
//注册驱动程序
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
//获得连接
String mysqlUrl = "jdbc:mysql://localhost/mydatabase";
Connection con = DriverManager.getConnection(mysqlUrl, "root", "password");
System.out.println("Connection established......");
//检索元数据对象
DatabaseMetaData metaData = con.getMetaData();
String[] types = {"TABLE"};
//检索数据库中的列
ResultSet tables = metaData.getTables(null, null, "%", types);
while (tables.next()) {
System.out.println(tables.getString("TABLE_NAME"));
}
}
}输出结果
Connection established...... cricketers_data customers dispatches_data employee_data myplayers sales test tutorials_data