标签：jdbc连接池技术 jdbc jdbc数据源和连接池 jdbc连接池 数据库连接池
<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<body>
<%@page import="javax.sql.*,javax.naming.*"%>
<%
long beginTime=System.currentTimeMillis();
int n=500;
ResultSet rs=null;
Statement st=null;
Connection con=null;
for(int i=0;i<n;i++)
{
try
{
Context ctx=new InitialContext(); //获得一个上下文对象
DataSource ds=(DataSource)ctx.lookup("java:comp/env/jdbc/pubs"); //通过上下文对象在JNDI中查找指定名字的数据源
con=ds.getConnection();//通过数据源获得一个连接池
String sql="select title,type,price from titles ";
st=con.createStatement();
rs=st.executeQuery(sql);
while(rs.next())
{
rs.getString("title");
rs.getString("type");
rs.getString("price");
}
}
catch(Exception e)
{
out.print(e.getMessage());
}
finally
{
if(rs!=null)
rs.close();
if(st!=null)
st.close();
if(con!=null)
con.close();
}
}
long endTime=System.currentTimeMillis();
out.print("用连接池作500次查询耗时:"+(endTime-beginTime)+"毫秒");
%>
</body>
</html>
<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<body>
<%@page import="javax.sql.*,javax.naming.*"%>
<%
long beginTime=System.currentTimeMillis();
int n=500;
ResultSet rs=null;
Statement st=null;
Connection con=null;
for(int i=0;i<n;i++)
{
try
{
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
String url="jdbc:sqlserver://localhost:1433;databaseName=pubs;user=sa;password=";
con = DriverManager.getConnection(url);
String sql="select title,type,price from titles ";
st=con.createStatement();
rs=st.executeQuery(sql);
while(rs.next())
{
rs.getString("title");
rs.getString("type");
rs.getString("price");
}
rs.close();
st.close();
con.close();
}
catch(Exception e)
{
out.print(e.getMessage());
}
finally
{
if(rs!=null)
rs.close();
if(st!=null)
st.close();
if(con!=null)
con.close();
}
}
long endTime=System.currentTimeMillis();
out.print("直接用JDBC连接作500次查询耗时:"+(endTime-beginTime)+"毫秒");
%>
</body>
</html>
标签：jdbc连接池技术 jdbc jdbc数据源和连接池 jdbc连接池 数据库连接池
原文地址：http://blog.csdn.net/xlgen157387/article/details/39431485
