使用DatabaseMetaDate获取数据库信息

import java.sql.*;

public class GetDBInfo

{

public GetDBInfo()

{

}

public static void main(String[] args)

{

try{

Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();

String url="jdbc:microsoft:sqlserver://GAOXIANG:1433;DataBaseName=master";

String user="daryl715";

String pass="1234";

String s;

Connection con=DriverManager.getConnection(url,user,pass);

DatabaseMetaData dbmd=con.getMetaData();

s = dbmd.getDriverName();

System.out.println("驱动程序的名称是: "+s);

System.out.println(" ");

s = dbmd.getDatabaseProductName();

System.out.println ("数据库名称是："+s);

System.out.println(" ");

ResultSet rs = dbmd.getSchemas();

System.out.println("模式名有：");

while(rs.next())

System.out.print(" "+rs.getString(1));

System.out.println();

s = dbmd.getSQLKeywords();

System.out.println("SQL中的关键词为: "+s);

System.out.println(" ");

int max=dbmd.getMaxColumnNameLength();

System.out.println ("列名的最大长度可以是："+max);

System.out.println(" ");

max = dbmd.getMaxTableNameLength();

System.out.println ("表名的最大长度可以是："+max);

System.out.println(" ");

max = dbmd.getMaxColumnsInSelect();

System.out.println ("一个select 子句所能返回的最多列数列名的最大长度可是是："+max);

System.out.println(" ");

max = dbmd.getMaxTablesInSelect();

System.out.println ("一个SELECT语句最多可以访问多少个表："+max);

System.out.println(" ");

max = dbmd.getMaxColumnsInTable();

System.out.println ("表中允许的最多列数："+max);

System.out.println(" ");

max = dbmd.getMaxConnections();

System.out.println ("并发访问的用户个数："+max);

System.out.println(" ");

max = dbmd.getMaxStatementLength();

System.out.println ("SQL语句最大允许的长度："+max);

System.out.println(" ");

s = dbmd.getNumericFunctions();

System.out.println("数据库的所有数学函数的列表: "+s);

System.out.println(" ");

s = dbmd.getStringFunctions();

System.out.println("数据库的所有字符串函数的列表: "+s);

System.out.println(" ");

s = dbmd.getSystemFunctions();

System.out.println("数据库的所有系统函数的列表: "+s);

System.out.println(" ");

s = dbmd.getTimeDateFunctions();

System.out.println("数据库的所有日期时间函数的列表: "+s);

System.out.println(" ");

rs = dbmd.getTypeInfo();

while(rs.next())

{

System.out.print(" 数据类型名："+rs.getString(1));

System.out.print(" 数据类型："+ rs.getString(2));

System.out.print(" 精度："+ rs.getString(3));

System.out.println(" 基数："+ rs.getString(18));

}

System.out.println(" ");

s = dbmd.getURL();

System.out.println("此数据库的url: "+s);

System.out.println(" ");

s = dbmd.getUserName();

System.out.println("此数据库的用户: "+s);

System.out.println(" ");

String [ ] t = { "TABLE", "VIEW" };

rs = dbmd.getTables(null, "HR", "%", t);

while(rs.next()){

System.out.print("目录名："+rs.getString(1));

System.out.print(" 模式名："+rs.getString(2));

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

System.out.print(" 表的类型："+rs.getString(4));

System.out.println(" 注释："+rs.getString(5));

}

System.out.println(" ");