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(" ");
rs = dbmd.getPrimaryKeys(null, "HR","EMPLOYEES");
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(" 列名顺序号："+rs.getString(4));
System.out.print(" 列名顺序号："+rs.getString(5));
System.out.println(" 主键名："+rs.getString(6));
}
System.out.println(" ");
rs = dbmd.getTableTypes();
System.out.println(" 表的类型有：");
while(rs.next())
System.out.print(" "+ rs.getString(1));
System.out.println();
System.out.println(" ");
rs = dbmd.getColumns(null, "HR", "EMPLOYEES", "%");
System.out.println(" 表名 "+" 列名 "+" 数据类型"+" 本地类型名"+" 列的大小"+ " 小数位数"+" 数据基数"+" 是否可空"+" 索引号");
while(rs.next()){
System.out.print(rs.getString(3)+" ");
System.out.print(rs.getString(4)+" ");
System.out.print(rs.getString(5)+" ");
System.out.print(rs.getString(6)+" ");
System.out.print(rs.getString(7)+" ");
System.out.print(rs.getString(9)+" ");
System.out.print(rs.getString(10)+" ");
System.out.print(rs.getString(11)+" ");
System.out.println(rs.getString(17)+" ");
}
System.out.println(" ");
rs = dbmd.getIndexInfo(null, "HR", "EMPLOYEES", false, false);
System.out.println(" 表名"+" 索引名"+" 索引类型"+" 索引列名"+" 索引顺序"+ " 小数位数"+" 数据基数"+" 是否可空"+" 索引号");
while(rs.next()){
System.out.print(rs.getString(3)+" ");
System.out.print(rs.getString(6)+" ");
System.out.print(rs.getString(7)+" ");
System.out.print(rs.getString(9)+" ");
System.out.println(rs.getString(10)+" ");
}
System.out.println(" ");
rs.close();
con.close();
}
catch(Exception e){System.out.println(e);}
new GetDBInfo();
}
}
