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使用DatabaseMetaDate获取数据库信息-JSP教程,数据库相关
楼主#
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发布于：2010-12-15 12:49
 | |  |  | 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("驱动程式的名称是: "+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 ("列名的最大长度能是："+max);
system.out.println(" "); max = dbmd.getmaxtablenamelength();
system.out.println ("表名的最大长度能是："+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语句最多能访问多少个表："+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();
}
}
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