Tomcat5.5中使用JNDI数据源

首先编辑Server.xml，添加数据源代码


<Context path="/StudentManager" docbase="StudentManager" debug="5" reload="true" crossContext="true">


<Resource name="jdbc/StudentManager" auth="Container" type="javax.sql.DataSource"/>


<ResourceParams name="jdbc/StudentManager">


<parameter>


<name>factory</name>


<values>org.apache.commons.dbcp.BasicDataSourceFactory</values>


</parameter>


<parameter>


<name>url</name>


<values>jdbc:mysql://localhost:3306/studentmanager</values>


</parameter>


<parameter>


<name>driverclassname</name>


<values>com.mysql.jdbc.Driver</values>


</parameter>


<parameter>


<name>username</name>


<values>root</values>


</parameter>


<parameter>


<name>password</name>


<values>root</values>


</parameter>


<parameter>


<name>maxWait</name>


<values>3000</values>


</parameter>


<parameter>


<name>maxIdle</name>


<values>10</values>


</parameter>


<parameter>


<name>maxActive</name>


<values>100</values>


</parameter>




</ResourceParams>


</Context>

在Web.xml中加入对jndi的引用


<resource-ref>


<description>SqlServer Datasource example</description>


<res-ref-name>jdbc/StudentManager</res-ref-name>


<res-type>javax.sql.DataSource</res-type>


<res-auth>Container</res-auth>


</resource-ref>



测试代码：




<%


String jndi="java:comp/env/jdbc/StudentManager";


DataSource ds=null;




try...{





Context initCtx=new InitialContext(); //初始化上下文，可以读配置文件如：web.xml


if(initCtx==null)


throw new Exception("Initial Failed!");


Context ctx=(Context)initCtx.lookup("java:comp/env");


if(ctx!=null)


ds=(DataSource)ctx.lookup("jdbc/StudentManager");


if(ds==null)


throw new Exception("Look up DataSource Failed!");


}




catch(Exception e)...{


System.out.println(e.getMessage());


}


System.out.println(ds);


%>