📄 metadata.jsp

📁 一本jsp自学教材

💻 JSP

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<%@ page contentType="text/html; charset=gb2312" %>
<%@ page language="java" %>
<%@ page import="com.mysql.jdbc.Driver" %>
<%@ page import="java.sql.*" %>
<HTML>
<head>
<title>获取列属性</title>
</head>
<BODY>
<%  
  //驱动程序名、数据库用户名、密码、数据库名、表名
  String driverName="com.mysql.jdbc.Driver";
  String username="root";
  String password="yesterdayn";
  String dbName="study";
  String tableName="product";
   //联结字符串 
  String url="jdbc:mysql://localhost/"+dbName+"?characterEncoding=GBK";
try{
  //加载驱动程序
  Class.forName("com.mysql.jdbc.Driver");
  //建立同数据库的连接对象
  Connection connection=DriverManager.getConnection(url,username,password);
  Statement statement = connection.createStatement();  
  //发送执行SQL语句  
  String sql="SELECT * FROM "+tableName;
  ResultSet rs=statement.executeQuery(sql);
  ResultSetMetaData rsmd=rs.getMetaData();
  out.print("<TABLE BORDER=1 bordercolorlight=#000000 >");
    out.print("<TR>");
    out.print("<TD width=70>列各称</TD>");
    out.print("<TD width=80>列类型</TD>");
    out.print("<TD width=60>列宽度</TD>");
    out.print("</TR>");
  for(int i=1;i<=rsmd.getColumnCount();i++)
  {
    out.print("<TR>");
    out.print("<TD width=70>"+rsmd.getColumnName(i)+"</TD>");
    out.print("<TD width=80>"+rsmd.getColumnTypeName(i)+"</TD>");
    out.print("<TD width=60>"+rsmd.getColumnDisplaySize(i)+"</TD>");
    out.print("</TR>");
  }
  out.print("</TABLE>");
  rs.close(); 
  statement.close();   
  connection.close();
 }
catch(SQLException e)
  {
   out.print(e.toString()); 
  }   

%>  
</HTML>
</BODY>

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