紧急求救,还是那个问题(getinitparameter()和config对象)


web.xml内容
<web-app   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 "   version= "2.4 ">

<welcome-file-list>
            <welcome-file> enter.jsp </welcome-file>
</welcome-file-list>

<servlet>
<servlet-name> connection </servlet-name>
<jsp-file> /connection.jsp </jsp-file>
        <init-param>
                  <param-name> servername </param-name>
                  <param-value> sun1 </param-value>
          </init-param>
          <init-param>
                <param-name> logid </param-name>
                <param-value> test </param-value>
          </init-param>
          <init-param>
                <param-name> logpass </param-name>
                <param-value> test </param-value>
          </init-param>
</servlet>

</web-app>

connection.jsp内容

<%@   page   import= "java.util.* "   %>
<%@   page   import= "java.sql.* "   %>

<%
String sServerName,sLogId,sLogPass;

sServerName=(String)config.getInitParameter( "servername ");
sLogId=(String)config.getInitParameter( "logid ");
sLogPass=(String)config.getInitParameter( "logpass ");

if(   sLogId==null   )
{
response.sendRedirect( "err_logid.html ");
return;
}

if(sServerName==null   )
{
response.sendRedirect( "err_servername.html ");
return;
}


if(sLogPass==null   )
{
response.sendRedirect( "err_logpass.html ");
return;
}

try
{Class.forName( "oracle.jdbc.driver.OracleDriver ");}
catch(ClassNotFoundException   e)
{
System.err.println( "1 "+e.getMessage());
        }

String sUrl= "jdbc:oracle:thin@localhost:1521: "+sServerName;
Connection con=DriverManager.getConnection(sUrl,sLogId,sLogPass);
%>

每次都要检测到空，转到几个出错页面

------解决方案--------------------
把


<context-param>
<param-name> servername </param-name>
<param-value> sun1 </param-value>
</context-param>
<context-param>
<param-name> logid </param-name>
<param-value> test </param-value>
</context-param>