[FIELDSET][LEGEND]引自：楼主[/LEGEND]
我按你们的说明书把音乐模块安装到tomcat中,jar包也放了进去,最后点击onlineMusic,出现错误如下:
HHTP Status 500-
javax.servlet.ServletException: java.lang.NullPointerException
org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:535)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:433)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

java.lang.NullPointerException
com.tools.ConnDB.executeQuery(ConnDB.java:59)
com.dao.SongDAO.queryType(SongDAO.java:19)
com.action.SongAction.main(SongAction.java:68)
com.action.SongAction.execute(SongAction.java:34)

[/FIELDSET]

回复：
请确定你的数据库连接是否正常.