1、配置%CATALINA_HOME%/conf/server.xml文件
???在<host>節(jié)點(diǎn)下的<context>節(jié)點(diǎn)中加
???<Resource
??????????? name="jdbc/oradb"
??????????? type="javax.sql.DataSource"
??????????? password="123456"
??????????? driverClassName="oracle.jdbc.driver.OracleDriver"
??????????? maxIdle="20"
??????????? maxWait="-1"
??????????? username="test"
??????????? url="jdbc:oracle:thin:@192.168.0.1:1521:oradb"
??????????? maxActive="1000"/>
2、配置項(xiàng)目的WEB-INF目錄下的web.xml文件，在<web-app>中加
?<resource-ref>
?<description>ORACLE DB Connection</description>
?<res-ref-name>jdbc/oradb</res-ref-name>
?<res-type>javax.sql.DataSource</res-type>
?<res-auth>Container</res-auth>
? </resource-ref>

3、連接
??Context ?initCtx = new InitialContext();
???if (initCtx == null)
???{
????throw new Exception("沒(méi)有匹配的環(huán)境!");
???}
???DataSource ds = (DataSource)initCtx.lookup("java:comp/env/jdbc/oradb");???

???if (ds == null)
???{
????throw new Exception("沒(méi)有匹配的數(shù)據(jù)庫(kù)!");
???}

???con = ds.getConnection();

一般按照這幾步配置，就能連接成功了！如果這樣配置后還提示
java:comp is not bound in this Context
那就檢查你的項(xiàng)目的WEB-INF目錄下lib目錄中是否加進(jìn)了一些如
naming-java.jar,naming-common.jar , naming-resources.jar , naming-factory.jar 之類的包，把這些包從lib目錄刪除了，這些包不必放在這里