Question

myeclipse打包java项目，mysql数据库怎么打包进去？

怎么把数据库打包进去，我用fatjar打包之后，数据库的驱动包是打包进去了的，然后我生成了exe。在我自己的电脑上可以运行，没有问题，可是传给另一台电脑之后，就无法连接数据库了，数据无法显示。具体的log是这样的：JarClassLoader: Warning: Unable to load native library: java.lang.NullPointerException
java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3609)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3541)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:943)
at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:4113)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1308)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2336)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2369)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2153)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:792)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:381)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:305)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at frame.NewSWTApp.button1MouseDown(NewSWTApp.java:329)
at frame.NewSWTApp.access$4(NewSWTApp.java:325)
at frame.NewSWTApp$5.mouseDown(NewSWTApp.java:283)
at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)
at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
at frame.NewSWTApp.main(NewSWTApp.java:320)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.simontuffs.onejar.Boot.run(Boot.java:306)
at com.simontuffs.onejar.Boot.main(Boot.java:159)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
……

Answer 1

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:943)
at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:4113)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1308)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2336)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2369)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2153)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:792)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:381)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:305)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at frame.NewSWTApp.button1MouseDown(NewSWTApp.java:329)
at frame.NewSWTApp.access$4(NewSWTApp.java:325)
at frame.NewSWTApp$5.mouseDown(NewSWTApp.java:283)
at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)
at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
at frame.NewSWTApp.main(NewSWTApp.java:320)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

Answer 2

'root'@'闹桥localhost' ?
改成你数据库所在的计算机的地址，不然的话，别人还要装一个数据库，然后建库建表才带弯羡蠢拍行

追问

/加载JDBC驱动
Class.forName("com.mysql.jdbc.Driver");
//连接到数据库
String dbUrl="jdbc:mysql://localhost:3306/mypetshop";
Connection c=DriverManager.getConnection(dbUrl,"root","fly");
代码是这样不对的吗？

Answer 3

把你的获得团饥枯connection的方法的 localhost改成 你电脑的ip 或者是 数据库所肢和在塌洞电脑的ip localhost 指定的是本机

追问

改成我的ip还是不行。

追答

改成你的IP之后 是什么错误 然后就是你连接数据库的代码是什么

追问

/加载JDBC驱动
Class.forName("com.mysql.jdbc.Driver");
//连接到数据库
String dbUrl="jdbc:mysql://localhost:3306/mypetshop";
Connection c=DriverManager.getConnection(dbUrl,"root","fly");
这是链接数据库的代码。

追答

是不是你的root的账号的权限问题

Answer 4

有问题到疯狂java论坛，那有疯狂java系列丛书的作者李刚，会帮你郑察世解答java上的问题，可以浏没姿览李刚创建的疯狂软喊肢件教育中心网站。

Answer 5

当然不对了，把localhost改成你的数据库主机的ip地址

追问

127.0.0.1？不能联网岂不是无法访问数据库了？

追答

127.0.0.1这个地址相当于localhost，对，不联网就不能访问数据库。

追问

怎样才能不联网也能访问数据库呢？不是很多应用程序都不必联网都能使用数据库么？

追答

这个，就不知道了