数据源的配置

以sql SERVER2005为例，首先把驱动包添加到tomcat目录下的common下的lib，然后在项目目录下的lib也添加进去。写一个配置文件，文件名为context.xml放到meta-inf目录下。context.xml文件的内容为：

<?xml version='1.0' encoding='utf-8'?>
<!--
  Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License,Version 2.0
  (the "License"); you may not use this file except in compliance with
  the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing,software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
-->
<!-- The contents of this file will be loaded for each web application -->
<Context>

    <!-- Default set of monitored resources -->
    <WatchedResource>WEB-INF/web.xml</WatchedResource>
 
    <!-- Uncomment this to disable session persistence across Tomcat restarts -->
    <!--
    <Manager pathname="" />
    -->

    <!-- Uncomment this to enable Comet connection tacking (provides events
         on session expiration as well as webapp lifecycle) -->
    <!--
    <Valve className="org.apache.catalina.valves.CometConnectionManagerValve" />
    -->
<Resource name="jdbc/test"
         auth="Container"     
         type="javax.sql.DataSource"     
         driverClassName="com.microsoft.sqlserver.jdbc.sqlServerDriver"     
         url="jdbc:sqlserver://localhost:1433;DatabaseName/=test"     
         username="lp"     
         password="lp"     
         maxActive="2"     
         maxIdle="2"     
         maxWait="30" />
</Context>

 

然后写一个测试类来测试一下，当然了，这个测试类要运行在tomcat服务器下了，所以只能是servlet咯。

在这我就只学主要代码咯：try {
            Context ctx = new InitialContext();
            DataSource ds = (DataSource) ctx.lookup("java:comp/env/jdbc/test");
            Connection conn = ds.getConnection();
            System.out.println("连接获取成功："+conn);
        } catch (NamingException e) {
            e.printstacktrace();
        } catch (sqlException e) {
            e.printstacktrace();
        }

就这么简单咯！加油咯！