我买了<<jsp数据库系统开发案例精选>>
在用javac编译客户管理系统中的CbankDao.java源码时,为什么你们就可以编译,我编译就
报错:
---------- javac ----------
CbankDao.java:4: 软件包 com.domain 不存在
import com.domain.CbankForm;
                  ^
CbankDao.java:9: 找不到符号
符号： 类 CbankForm
位置： 接口 com.dao.CbankDao
  public void bankDelete(CbankForm bank);
                         ^
CbankDao.java:11: 找不到符号
符号： 类 CbankForm
位置： 接口 com.dao.CbankDao
  public void bankUpdate(CbankForm bank);
                         ^
CbankDao.java:13: 找不到符号
符号： 类 CbankForm
位置： 接口 com.dao.CbankDao
  public void bankInsert(CbankForm bank);
                         ^
CbankDao.java:17: 找不到符号
符号： 类 CbankForm
位置： 接口 com.dao.CbankDao
  public CbankForm bankSelectOne(CbankForm bank);
                                 ^
CbankDao.java:17: 找不到符号
符号： 类 CbankForm
位置： 接口 com.dao.CbankDao
  public CbankForm bankSelectOne(CbankForm bank);
         ^
6 错误

输出完成 (耗时 0 秒) - 正常终止
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同样是这一本书,我按照录像中配置OA,可以登陆进去,但是添加部门时,错误如下
java.lang.NullPointerException
com.department.Add.doPost(Add.java:53)
javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
点击公文查看出现:
org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:460)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
com.bumf.See.doPost(See.java:83)
com.bumf.See.doGet(See.java:87)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)


root cause 

java.lang.NullPointerException
org.apache.jsp.bumf.see_jsp._jspService(see_jsp.java:121)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
com.bumf.See.doPost(See.java:83)
com.bumf.See.doGet(See.java:87)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)