jsp 问题：HTTP Status 500 -

[zmg2007]

HTTP Status 500 -

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type Exception report

message

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

exception

java.lang.NullPointerException
com.wy.tool.JDBConnection.executeQuery(JDBConnection.java:52)
com.wy.dao.ConsumerDao.getConsumerForm(ConsumerDao.java:98)
com.wy.webiter.ConsumerServlet.checkConsumer(ConsumerServlet.java:169)
com.wy.webiter.ConsumerServlet.doGet(ConsumerServlet.java:16)
com.wy.webiter.ConsumerServlet.doPost(ConsumerServlet.java:186)
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


note The full stack trace of the root cause is available in the Apache Tomcat/5.5.20 logs.


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Apache Tomcat/5.5.20


请问如何解决？

[xuhaiyang]

JDBConnection.java:52行空指针异常

[mili_mutou]

数据库中没有记录，或者sql语句有问题，所以ConsumerDao.getConsumerForm(ConsumerDao.java:98)
出现空指针异常