Java编程 数据库MySQL 添加数据

问题描述

Java编程 数据库MySQL 添加数据

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)
出现这种情况怎么解决

解决方案

出现未知的源代码
（只看这看不出来啥，你把错误日志全贴出来啊）
报空指针异常，你回去看看你代码，
哪里有传参数错误，
或代码有敲错的地方没

解决方案二：

就是向数据库中添加数据添加不进去，出现这个错误
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at admin.adminview.mousePressed(adminview.java:954)
at java.awt.AWTEventMulticaster.mousePressed(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$400(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.security.AccessControlContext$1.doIntersectionPrivilege(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.AccessControlContext$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 admin.adminview.mouseReleased(adminview.java:961)
at java.awt.AWTEventMulticaster.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$400(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.security.AccessControlContext$1.doIntersectionPrivilege(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.AccessControlContext$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)

解决方案三：

在这个地方报了空指针异常admin.adminview.mousePressed(adminview.java:954)，看看是不是没有获取到要插入的值

解决方案四：

你是Swing编程吧，你要检查一下是否有swing组件没有初始化，你是在事件分派线程中错误，看看你的方法响应里面，那句话导致的。

时间： 2024-09-03 21:38:21

Java编程 数据库MySQL 添加数据的相关文章

Eclipse中java向数据库中添加数据，更新数据，删除数据

前面详细写过如何连接数据库的具体操作,下面介绍向数据库中添加数据. 注意事项:如果参考下面代码,需要 改包名,数据库名,数据库账号,密码,和数据表(数据表里面的信息) 1 package com.ningmeng; 2 3 import java.sql.*; 4 5 /** 6 * 1:向数据库中添加数据 7 * @author biexiansheng 8 * 9 */ 10 public class Test01 { 11 12 public static void main(String

mysql-再往数据库中添加数据时，起初可以添加进去，之后不知道是把电脑关了还是怎么老报错，而且添加不进去了

问题描述 再往数据库中添加数据时,起初可以添加进去,之后不知道是把电脑关了还是怎么老报错,而且添加不进去了 Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if

mysql添加数据问题，急、急、急

问题描述 mysql添加数据问题,急.急.急 添加hibernate支持后用junit测试添加数据发现一个奇怪的问题,数据库里有两张表,一个商家表(参照表),一个商品表(外键表),测试之前有在数据表添加一些数据,第一次测试添加数据后在数据表里发现参照表的id居然跟着外键表的id一样,而不是自增的,不过就只有第一次添加数据是这种情况,之后又添加了好几条数据,参照表的id正常自增,哪位大神可以帮忙解释下原因吗? 解决方案 jboss问题,急急急急急recv接收问题,急急急急DispatchActio

sqoop client java api将mysql的数据导到hdfs

问题描述 sqoop client java api将mysql的数据导到hdfs package com.hadoop.recommend; import org.apache.sqoop.client.SqoopClient; import org.apache.sqoop.model.MDriverConfig; import org.apache.sqoop.model.MFromConfig; import org.apache.sqoop.model.MJob; import org

c#这段代码向数据库批量添加数据为何1000行就需要10分钟啊求大神帮忙优化啊

问题描述 c#这段代码向数据库批量添加数据为何1000行就需要10分钟啊求大神帮忙优化啊 public void ShuaXin() { SqlCommand com = new SqlCommand(""delete from priceavg"" DBHelper.con); DBHelper.con.Open(); com.ExecuteNonQuery(); adapter = new SqlDataAdapter(""select *

web开发-给数据库中添加数据，一直没成功，网页不 跳转。急！！

问题描述 给数据库中添加数据,一直没成功,网页不 跳转.急!! string connectionString = @"Data Source=DELL-PC;Initial Catalog = GXBYXS;User ID=sa;Password=123456 "; //定义字符串 System.Data.SqlClient.SqlConnection connection = new System.Data.SqlClient.SqlConnection(connectionStr

java更改数据库中的数据

不废话,上代码   1 package com.ningmeng; 2 3 import java.sql.*; 4 5 /** 6 * 1:更改数据库中的数据 7 * @author biexiansheng 8 * 9 */ 10 public class Test04 { 11 12 public static void main(String[] args) { 13 // TODO Auto-generated method stub 14 try { 15 Class.forName

数据库更新--添加数据

一个数据库能否保持信息的正确性.及时性.很大程度上依赖于数据库的更新功能的强弱与实时.数据库的更新包括插入.删除.修改(也称为更新)三种操作.本章将分别讲述如何使用这些操作,以便有效地更新数据库. 在SQL Server 中可以在Enterprise Manager 中查看数据库表的数据时添加数据,但这种方式不能应付数据的大量插入,需要使用INSERT 语句来解决这个问题. 11.1.1 INSERT 语法数据库的信息时常需要改变用户需要添邮荩琁NSERT 语句提供了此功能.INSERT语句通

MS SQL基础教程：数据库更新-添加数据

一个数据库能否保持信息的正确性.及时性.很大程度上依赖于数据库的更新功能的强弱与实时.数据库的更新包括插入.删除.修改(也称为更新)三种操作.本章将分别讲述如何使用这些操作,以便有效地更新数据库. 在SQL Server 中可以在Enterprise Manager 中查看数据库表的数据时添加数据,但这种方式不能应付数据的大量插入,需要使用INSERT 语句来解决这个问题. 11.1.1 INSERT 语法 数据库的信息时常需要改变用户需要添加数据,INSERT 语句提供了此功能.INSERT语