UC知道江湖救急，做好的jsp系统登陆不进去
来源：百度知道 编辑：UC知道 时间：2024/06/25 18:24:32
毕设快答辩了，我找上届要了个毕设，可现在系统一登陆就报错，我快哭了，哪位好心人帮我看看，用tomcat5.5,jdk1.6.错误提示
HTTP Status 500 -
--------------------------------------------------------------------------------
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Exception in JSP: /jiao/add.jsp:11
8: time=time+"0"+(today.getYear()-100)+"."+(today.getMonth()+1)+"."+(today.getDate())+ " "+(today.getHours())+":"+w;
9: try{
10: String condition0="INSERT INTO record (content,shijian,figure,logname) VALUES "+"("+"'"+t+"'"+","+"'"+time+"'"+","+"'"+id+"'"+","+"'"+lognane+"'"+")&quo
HTTP Status 500 -
--------------------------------------------------------------------------------
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Exception in JSP: /jiao/add.jsp:11
8: time=time+"0"+(today.getYear()-100)+"."+(today.getMonth()+1)+"."+(today.getDate())+ " "+(today.getHours())+":"+w;
9: try{
10: String condition0="INSERT INTO record (content,shijian,figure,logname) VALUES "+"("+"'"+t+"'"+","+"'"+time+"'"+","+"'"+id+"'"+","+"'"+lognane+"'"+")&quo
sql写的太繁琐了，可以这样：
String condition0="INSERT INTO record (content,shijian,figure,logname) VALUES " +"('"+t+"','"+time+"','"+id+"','"+lognane+"')";
空指针异常了，查看一下各个属性的值，注意一下time的声明是否正确。结合上下文都没贴出来的程序看看。
使用的变量里面有至少一个是null值，
请检查
today,
sql
看看过 两个变量 是不是已经初使化了呢，
汗 . . .
真是看不懂啊，我太菜了，大概或许不能看懂
你是说 “登录”吗？
可是我看到页面上报错的执行语句是：insert 而不是：select
能用 insert 来做“登录”，我受教了
建议你看看：Statement 对象是不是为空
Statement 不为空，检查执行语句有没有写错
可能是软件问题，建议换个版本试试
可以找同学，老师帮忙吗