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  • Jndi and c3p0 in Tomcat

    Tomcat 中Jndi是使用Tomcat自带的连接池
    抛弃Tomcat自带的连接池。使用c3p0 。

    环境:Tomcat 5.5.20
    下面配置只适合Tomcat 5.5.X


    下面来看Jndi 与 c3p0 结合:
    c3p0 下载地址:http://nchc.dl.sourceforge.net/sourceforge/c3p0/c3p0-0.9.0.4.bin.zip
    把 c3p0-0.9.0.4.jar 放到应用服务的WEB-INF/lib目录下。如:DBTest/WEB-INF/lib

    1.在server.xml中<Context></Context>内加<Resource />,完整的示例:

    <Context path="/DBTest" docBase="DBTest"
            debug="5" reloadable="true" crossContext="true">
    <Resource auth="Container"
     driverClass="com.mysql.jdbc.Driver"
                                        maxPoolSize="50" minPoolSize="2" acquireIncrement="2"
                                        name="jdbc/connPool" user="root" password=""
                                        factory="org.apache.naming.factory.BeanFactory"
                                        type="com.mchange.v2.c3p0.ComboPooledDataSource"
                                        jdbcUrl="jdbc:mysql://localhost:3306/test" />
    </Context>

    2.在web.xml添加:

      <resource-ref>
          <description>DB Connection</description>
          <res-ref-name>jdbc/connPool</res-ref-name>
          <res-type>javax.sql.DataSource</res-type>
          <res-auth>Container</res-auth>
      </resource-ref>

    3.测试页面testConnPool.jsp

    <%@ page language="java" pageEncoding="UTF-8"%>
    <%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql" %>
    <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
    
    <sql:query var="rs" dataSource="jdbc/connPool">
    select id, typename from text
    </sql:query>
    
    <html>
      <head>
        <title>DB Test Conn Pool c3p0 and Jndi</title>
      </head>
      <body>
    
      <h2>Results</h2>
      
    <c:forEach var="row" items="${rs.rows}">
        id: ${row.id}<br/>
        name: ${row.typename}<br/>
    </c:forEach>
    
      </body>
    </html>
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  • 原文地址:https://www.cnblogs.com/koal/p/4367676.html
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