//=================================================

// File Name       :	DatabaseMetaData_demo

//------------------------------------------------------------------------------

// Author          :	Common

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.sql.*;

import java.text.SimpleDateFormat;

import java.util.Scanner;

//主类

//Function        : 	DatabaseMetaData_demo

public class DatabaseMetaData_demo {

	//定义MySQL的数据库驱动程序

	public static final String DBDRIVER = "org.gjt.mm.mysql.Driver";

	//定义MySQL数据库的连接地址

	public static final String DBURL = "jdbc:mysql://localhost:3306/mysql_demo";

	//MySQL数据库的连接用户名

	public static final String DBUSER = "root";

	//MySQL数据库的连接密码

	public static final String DBPASS = "123456";

	public static void main(String[] args) throws Exception{

		// TODO 自动生成的方法存根

	  Connection conn = null;                     //数据库连接

      DatabaseMetaData dmd = null; //数据库元数据

      ResultSet rs = null;                                //保存结果集

      Class.forName(DBDRIVER);            //加载驱动程序

      //连接MySQL数据库时，要写上连接的用户名和密码

      conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS);

      dmd = conn.getMetaData();				//实例化元数据

      System.out.println("数据库名称："+dmd.getDatabaseProductName());

      System.out.println("数据库版本："+dmd.getDriverMajorVersion()+"."+dmd.getDriverMinorVersion());

      rs = dmd.getPrimaryKeys(null, null, "user");	//得到表的主键

      while(rs.next()){

    	  System.out.println("表类型："+rs.getString(1));

    	  System.out.println("表模式："+rs.getString(2));

    	  System.out.println("表名称："+rs.getString(3));

    	  System.out.println("列名称："+rs.getString(4));

    	  System.out.println("主键序列号："+rs.getString(5));

    	  System.out.println("主键名称："+rs.getString(6));

      }

      conn.close();

	}

}