org.apache.jasper.JasperException: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:541)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:435)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)java.lang.NullPointerException
com.buy.bean.coin.OrderSelectBean.selectOrder(OrderSelectBean.java:85)
org.apache.jsp.COIN.oder_jsp._jspService(oder_jsp.java:220)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:541)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:435)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)java.lang.NullPointerException
com.buy.bean.coin.OrderSelectBean.selectOrder(OrderSelectBean.java:85)
org.apache.jsp.COIN.oder_jsp._jspService(oder_jsp.java:220)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
com.buy.bean.coin.OrderSelectBean.selectOrder(OrderSelectBean.java:85)空指针 在OrderSelectBean85行 断点跟踪下
自己好好看看
经典啊,呵呵
还有谢谢回复我的人,好热情啊!
我试试了,还是不知道为什么。
85:sql = conn.createStatement();
是不是连接数据库出问题?
sql = conn.createStatement();这句可能有问题,
一般常用的是pstmt=conn.createStatement(sql);
在这个页面上一处你觉得有错的地方,双击一下。然后Debug一下,看看你的传值怎么样。通常这样的情况都是因为你的传值传不过去。个人觉得应该是传值问题!
java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: NO)