老师，您好！

<<java项目开发全程实录>>项目名称：进销存管理系统，源码代码无法运行，要如何处理？

一．相关问题：

１.进销存管理系统，有采用线程，并发技术吗？支持多个用户同时操作一同表吗？

  如：支持５个业务员同时，在添加订单记录？

２.这个项目如何在企业内部局域网运行？

３.如何打印，如要打印"销售开单"？

４.建议，本书项目开发全程实录，需光盘视频并没全程，而是有选择讲解，其中一部与书上已写，及有文字说明，

     如：开发背景什么，在光盘视频讲解，这没实质，真实有用，就是把开发每个过程，详细讲解，这样对基础差

　　学员，能更好理解和学习，老师可以与复制源码方式，还原开发全过程，真正"全程实录"，希望能补录，放

　　上线上供学员下载．

５.本书上多个项目分别采用不同类型数据库，如：ＳＱＬ２００５,ＯＲＡＣＣＥ,能否直接转入ＳＱＬ２０００

     吗？转入后，是否要对项目的源码进行修改？主要要修改哪些内容？

二．重点问题：源码代码运行失败

１.按书上的光盘视频正确导入源码，执行"运行"提示如下错误：

　　这个错误提示是什么意思？错在哪里，如何查看，并进行有效处理？

java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC]Error establishing socket.

at com.microsoft.jdbc.base.BaseExceptions.createException(Unknown Source)

at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)

at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)

at com.microsoft.jdbc.sqlserver.tds.TDSConnection.<init>(Unknown Source)

at com.microsoft.jdbc.sqlserver.SQLServerImplConnection.open(Unknown Source)

at com.microsoft.jdbc.base.BaseConnection.getNewImplConnection(Unknown Source)

at com.microsoft.jdbc.base.BaseConnection.open(Unknown Source)

at com.microsoft.jdbc.base.BaseDriver.connect(Unknown Source)

at java.sql.DriverManager.getConnection(Unknown Source)

at java.sql.DriverManager.getConnection(Unknown Source)

at com.lzw.dao.Dao.<clinit>(Dao.java:41)

at com.lzw.login.Login$2.actionPerformed(Login.java:54)

at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)

at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)

at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)

at javax.swing.DefaultButtonModel.setPressed(Unknown Source)

at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)

at java.awt.Component.processMouseEvent(Unknown Source)

at javax.swing.JComponent.processMouseEvent(Unknown Source)

at java.awt.Component.processEvent(Unknown Source)

at java.awt.Container.processEvent(Unknown Source)

at java.awt.Component.dispatchEventImpl(Unknown Source)

at java.awt.Container.dispatchEventImpl(Unknown Source)

at java.awt.Component.dispatchEvent(Unknown Source)

at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)

at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)

at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)

at java.awt.Container.dispatchEventImpl(Unknown Source)

at java.awt.Window.dispatchEventImpl(Unknown Source)

at java.awt.Component.dispatchEvent(Unknown Source)

at java.awt.EventQueue.dispatchEventImpl(Unknown Source)

at java.awt.EventQueue.access$200(Unknown Source)

at java.awt.EventQueue$3.run(Unknown Source)

at java.awt.EventQueue$3.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)

at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)

at java.awt.EventQueue$4.run(Unknown Source)

at java.awt.EventQueue$4.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)

at java.awt.EventQueue.dispatchEvent(Unknown Source)

at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)

at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)

at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

at java.awt.EventDispatchThread.run(Unknown Source)

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException

at com.lzw.dao.Dao.getUser(Dao.java:120)

at com.lzw.login.Login$2.actionPerformed(Login.java:54)

at java.awt.EventQueue.dispatchEvent(Unknown Source)

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException

at com.lzw.dao.Dao.getUser(Dao.java:120)

at com.lzw.login.Login$2.actionPerformed(Login.java:54)

at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)

java.awt.EventDispatchThread.pumpEvents(Unknown Source)

at java.awt.EventDispatchThread.run(Unknown Source)

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException

at com.lzw.dao.Dao.getUser(Dao.java:120)

at com.lzw.login.Login$2.actionPerformed(Login.java:54)

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