数据库连接池！请各位帮忙！

Question

你的web.xml里配置了数据库连接池了吗？

Answer 1

web.xml 配置如下
<servlet>
    <servlet-name>dbInit</servlet-name>
    <servlet-class>com.wrox.tourism.db.util.DBInitServlet</servlet-class>
    <init-param>
      <param-name>driverClass</param-name>
      <param-value>org.gjt.mm.mysql.Driver</param-value>
    </init-param>
    <init-param>
      <param-name>jdbcURL</param-name>
      <param-value>jdbc:mysql://localhost/webapp</param-value>
    </init-param>
    <init-param>
      <param-name>minCount</param-name>
      <param-value>1</param-value>
    </init-param>
    <init-param>
      <param-name>maxCount</param-name>
      <param-value>10</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>

Answer 2

有没有这个方法哦
GenericDataSource ds = new GenericDataSource();
为什么不行呢？

Answer 3

Context initCtx = new InitialContext();
     Context envCtx = (Context) initCtx.lookup("java:comp/env");
     javax.sql.DataSource ds = (DataSource)envCtx.lookup("jdbc/oracle");