Eclipse3.4+wtp+tomcat5.5环境下配置对oracle数据库的jndi数据源

姚絲麥 — Wed, 09 Jul 2008 00:55:00 GMT

首先在eclipse下新建一个名为jndi的动态web项目;
打开其目录下的web.xml,进行配置:

xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    <display-name>
    jndidisplay-name>

    <resource-ref>
      <res-ref-name>jdbc/oracleres-ref-name>
      <res-type>javax.sql.DataSourceres-type>
      <res-auth>Containerres-auth>
    resource-ref>

    <welcome-file-list>
        <welcome-file>index.htmlwelcome-file>
        <welcome-file>index.htmwelcome-file>
        <welcome-file>index.jspwelcome-file>
        <welcome-file>default.htmlwelcome-file>
        <welcome-file>default.htmwelcome-file>
        <welcome-file>default.jspwelcome-file>
    welcome-file-list>
web-app>

然后对server.xml进行配置:

xml version="1.0" encoding="UTF-8"?>
<Server>
  <Listener className="org.apache.catalina.core.AprLifecycleListener"/>
  <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"/>
  <Listener className="org.apache.catalina.storeconfig.StoreConfigLifecycleListener"/>
  <Listener className="org.apache.catalina.mbeans.ServerLifecycleListener"/>
  <GlobalNamingResources>
    <Environment name="simpleValue" type="java.lang.Integer" value="30"/>
    <Resource auth="Container" description="User database that can be updated and saved" factory="org.apache.catalina.users.MemoryUserDatabaseFactory" name="UserDatabase" pathname="conf/tomcat-users.xml" type="org.apache.catalina.UserDatabase"/>
  GlobalNamingResources>
  <Service name="Catalina">
    <Connector connectionTimeout="20000" maxSpareThreads="75" maxThreads="150" minSpareThreads="25" port="80" redirectPort="8443">
    Connector>
    <Connector connectionTimeout="-1" port="8009" protocol="AJP/1.3" redirectPort="8443">
    Connector>
    <Engine defaultHost="localhost" name="Catalina">
      <Realm className="org.apache.catalina.realm.UserDatabaseRealm"/>
      <Host appBase="webapps" name="localhost">
          <Context docBase="jndi" path="/jndi" reloadable="true" source="org.eclipse.jst.j2ee.server:jndi">
              <Resource
              name="jdbc/oracle"
              type="javax.sql.DataSource"
              driverClassName="oracle.jdbc.driver.OracleDriver"
              password="tiger"
              maxIdle="2"
              maxWait="5000"
              username="scott"
              url="jdbc:oracle:thin:@localhost:1521:guitar"
              maxActive="4"/>
          Context>
      Host>
    Engine>
  Service>
Server>

最后写一个名为test.jsp的测试页面

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ page import="java.sql.*"%>
<%@ page import="javax.sql.*"%>
<%@ page import="javax.naming.*"%>
<%!final String JNDINAME = "java:comp/env/jdbc/oracle";%>
<%
    Connection conn = null;
    try {
        // 初始化查找命名空间
        Context ctx = new InitialContext();
        // 找到DataSource
        DataSource ds = (DataSource) ctx.lookup(JNDINAME);
        conn = ds.getConnection();
        Statement st = conn.createStatement();
        ResultSet rs = st.executeQuery("select * from emp");
        while (rs.next()) {
            int size = rs.getMetaData().getColumnCount();
            for (int i = 1; i <= size; i++) {
                out.println(rs.getString(i) + "
");
            }
        }

    } catch (Exception e) {
        System.out.println(e);
    }
%>
<%=conn%>
<%
    // 将连接重新放回到池中
    conn.close();
%>

至此,配置对oracle的jndi数据源已经列出相关最重要的配置代码,需要注意的是,必须在项目中导入相对应的数据库驱动jar包,本例子中导入ojdbc14.jar.需要注意的是代码中加粗部分,可能需要根据你的实际情况有所改变,JNDINAME的名字是一一对应的.server.xml的配置有许多方法,这里就不一一细述,网上例子很多.

本人水平有限,欢迎高手和我交流批评^_^

姚絲麥 2008-07-09 08:55 发表评论

BlogJava-姚絲麥-随笔分类-java

Eclipse3.4+wtp+tomcat5.5环境下配置对oracle数据库的jndi数据源