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1、配置數據源Resource?，多種方式：

a)存為context.xml,于項目WebRoot/META-INF下；

b)存為項目名.xml，于$tomcat-home$\conf\Catalina\localhost下；

c)Resource部分，粘貼于$tomcat-home$\conf\context.xml中

<Context></Context>

之間；

d)設置為全局連接池，Resource 部分粘貼于$tomcat-home$\conf\server.xml，

<GlobalNamingResources></GlobalNamingResources>

之間，并在conf/context.xml中

<Context></Context>

之間，設置 ?

<ResourceLink?type="javax.sql.DataSource"???name="jdbc/pdbqz"?global="jdbc/TestDB"?/>

<?xml?version="1.0"?encoding="UTF-8"?> <Context> <Resource?name="jdbc/pdbqz"auth="Container"type="javax.sql.DataSource"factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"testWhileIdle="true"testOnBorrow="true"testOnReturn="false"validationQuery="SELECT?1"validationInterval="30000"timeBetweenEvictionRunsMillis="30000"maxActive="100"minIdle="10"maxWait="10000"initialSize="10"removeAbandonedTimeout="60"removeAbandoned="true"logAbandoned="true"minEvictableIdleTimeMillis="30000"jmxEnabled="true"jdbcInterceptors="org.apache.tomcat.jdbc.pool.interceptor.ConnectionState;org.apache.tomcat.jdbc.pool.interceptor.StatementFinalizer"username="qzdata"password="93411316"driverClassName="oracle.jdbc.driver.OracleDriver"url="jdbc:oracle:thin:@localhost:1521:PDBQZ"/></Context>

2、數據庫驅動jar包拷貝到tomcat lib中；

3、從tomcat lib中拷貝tomcat-jdbc.jar到項目lib，方便編程中調用；

4、異步獲取連接：

package?db;import?java.sql.Connection; import?java.sql.ResultSet; import?java.sql.Statement; import?java.util.concurrent.Future;import?javax.naming.Context; import?javax.naming.InitialContext;import?org.apache.tomcat.jdbc.pool.DataSource;public?class?DBConn?{public?void?poolTest()?throws?Exception{Connection?con?=?null;Context?initCtx=new?InitialContext();Context?envCtx=(Context)initCtx.lookup("java:/comp/env");DataSource?datasource=(DataSource)envCtx.lookup("jdbc/pdbqz");try?{Future<Connection>?future?=?datasource.getConnectionAsync();while(!future.isDone())?{System.out.println("Connection?is?not?yet?available.?Do?some?background?work");try?{Thread.sleep(100);?//simulate?work}catch?(InterruptedException?x)?{Thread.currentThread().interrupt();}}con?=?future.get();?//should?return?instantlyStatement?st?=?con.createStatement();ResultSet?rs?=?st.executeQuery("select?*?from?USERINFO");int?cnt?=?1;while?(rs.next())?{System.out.println((cnt++)?+?"?User:"?+?rs.getString("userid")?+?"?Password:"?+?rs.getString("password"));}rs.close();st.close();}?finally?{if?(con?!=?null)?{try?{con.close();}?catch?(Exception?ignore)?{ignore.printStackTrace();}}}} }

5、jsp中調用該類。

更多信息參考：https://tomcat.apache.org/tomcat-7.0-doc/jdbc-pool.html

http://blog.csdn.net/yp5185423/article/details/8299800

轉載于:https://my.oschina.net/u/133558/blog/293009

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