dawei
下面介绍在Tomcat服务器下使用连接池来连接数据库的操作 一：修改web.xml文件：
<div class=”codetitle”><a style=”CURSOR: pointer” data=”77479″ class=”copybut” id=”copybut77479″ onclick=”doCopy(‘code77479’)”> 代码如下:<div class=”codebody” id=”code77479″>
<?xml version=”1.0″ encoding=”UTF-8″?>
<web-app xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance” xmlns=”http://java.sun.com/xml/ns/javaee” xmlns:web=”http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd” xsi:schemaLocation=”http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd” id=”WebApp_ID” version=”3.0″>
在web-app之间插入
<div class=”codetitle”><a style=”CURSOR: pointer” data=”69193″ class=”copybut” id=”copybut69193″ onclick=”doCopy(‘code69193’)”> 代码如下:<div class=”codebody” id=”code69193″>
<Resource name=”siniteksirm” auth=”Container”
type=”javax.sql.DataSource”
driverClassName=”oracle.jdbc.OracleDriver”
url=”jdbc:oracle:thin:@192.168.1.196:1521:orcl”
username=”paxt”
password=”paxt”
maxActive=”20″
maxIdle=”10″
maxWait=”-1″
testOnBorrow=”true”
validationQuery=”select 1 from dual”/>
三：选择Oracle的数据库驱动，加入到Tomcat的lib包中。本项目中为：Ojdbc14.jar. 四：提供一个jsp页面：
<div class=”codetitle”><a style=”CURSOR: pointer” data=”47166″ class=”copybut” id=”copybut47166″ onclick=”doCopy(‘code47166’)”> 代码如下:<div class=”codebody” id=”code47166″>
<%@ page language=”java” contentType=”text/html; charset=UTF-8″ pageEncoding=”UTF-8″%>
<%@ page import=”javax.naming.Context” %>
<%@ page import=”javax.naming.InitialContext” %>
<%@ page import=”java.sql.” %>
<%@ page import=”javax.sql.DataSource” %>
<!DOCTYPE html PUBLIC “-//W3C//DTD HTML 4.01 Transitional//EN” “http://www.w3.org/TR/html4/loose.dtd”>
<meta http-equiv=”Content-Type” content=”text/html; charset=UTF-8″>
<%
DataSource ds = null;
try{
Context context = new InitialContext();
ds = (DataSource)context.lookup(“java:comp/env/siniteksirm”);
Connection conn = ds.getConnection();
PreparedStatement pst = conn.prepareStatement(“select from sdc_fundbase where rownum <= 2″);
ResultSet rs = pst.executeQuery();
while(rs.next()){
out.println(rs.getString(“fund4”));
out.println(“
“);
}
if(ds != null){
out.println(“数据库连接”);
}
}catch(Exception e){
e.printStackTrace();
out.println(“数据库连接失败”);
}
%>
启动Tomcat，这样就可以访问页面。
