LINUX环境下的JDBC配置,请教高手了.我实在是搞不出来了

[e66478]

这是我的profile变量设置
unset i
unset pathmunge
export JAVA_HOME=/usr/local/jdk1.5.0_09
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.:$JAVA_HOME/jre/lib:$JAVA_HOME/lib:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/mysql-connector-java-5.0.4-bin.jar
export TOMCAT_HOME=/usr/local/tomcat
export CATALINA_HOME=/usr/local/tomcat
export CLASSPATH=$CLASSPATH:$CATALINA_HOME/common/lib

mysql-connector-java-5.0.4-bin.jar此文件已经放在LIB下.

当连接数据库时
type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


root cause

java.lang.NullPointerException
com.common.database.DBname.executeQuery(DBname.java:32)
net.common.LoginAction.Login(LoginAction.java:19)
org.apache.jsp.logincheck_jsp._jspService(logincheck_jsp.java:48)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


note The full stack trace of the root cause is available in the Apache Tomcat/5.5.17 logs.