java.lang.ClassNotFoundException: com.mysql.jdbc.Driver项目连不上数据库异常，缺少mysql驱动

最新推荐文章于 2024-02-25 16:28:31 发布
原创 最新推荐文章于 2024-02-25 16:28:31 发布 · 947 阅读 · 0 ·
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#mysql连接异常

OFBiz项目启动时报错，无法连接数据库，原因是未找到MySQL驱动类。确认配置正确，但缺失mysql-connector-java-5.1.25.jar。
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项目启动，数据库连接不上：

2018-06-26 14:01:00,168 |OFBiz-JobPoller      |DBCPConnectionFactory         |E| null
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_161]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_161]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_161]
	at java.lang.Class.forName0(Native Method) ~[?:1.8.0_161]
	at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_161]
	at org.ofbiz.entity.connection.DBCPConnectionFactory.getConnection(DBCPConnectionFactory.java:88) [ofbiz-entity.jar:?]
	at org.ofbiz.geronimo.GeronimoTransactionFactory.getConnection(GeronimoTransactionFactory.java:83) [ofbiz-geronimo.jar:?]
	at org.ofbiz.entity.jdbc.SQLProcessor.getConnection(SQLProcessor.java:260) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.jdbc.SQLProcessor.prepareStatement(SQLProcessor.java:366) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.datasource.GenericDAO.selectListIteratorByCondition(GenericDAO.java:763) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.datasource.GenericHelperDAO.findListIteratorByCondition(GenericHelperDAO.java:140) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.GenericDelegator.find(GenericDelegator.java:1775) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.GenericDelegator.findList(GenericDelegator.java:1811) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.util.EntityQuery.query(EntityQuery.java:451) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.util.EntityQuery.queryList(EntityQuery.java:376) [ofbiz-entity.jar:?]
	at org.ofbiz.service.job.JobManager.reloadCrashedJobs(JobManager.java:294) [ofbiz-service.jar:?]
	at org.ofbiz.service.job.JobPoller$JobManagerPoller.run(JobPoller.java:223) [ofbiz-service.jar:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_161]
2018-06-26 14:01:00,168 |OFBiz-JobPoller      |GenericDelegator              |E| Failure in findByCondition operation for entity [JobSandbox]: org.ofbiz.entity.GenericEntityException: com.mysql.jdbc.Driver (com.mysql.jdbc.Driver). Rolling back transaction.
org.ofbiz.entity.GenericEntityException: com.mysql.jdbc.Driver (com.mysql.jdbc.Driver)
	at org.ofbiz.entity.connection.DBCPConnectionFactory.getConnection(DBCPConnectionFactory.java:91) ~[ofbiz-entity.jar:?]
	at org.ofbiz.geronimo.GeronimoTransactionFactory.getConnection(GeronimoTransactionFactory.java:83) ~[ofbiz-geronimo.jar:?]
	at org.ofbiz.entity.jdbc.SQLProcessor.getConnection(SQLProcessor.java:260) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.jdbc.SQLProcessor.prepareStatement(SQLProcessor.java:366) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.datasource.GenericDAO.selectListIteratorByCondition(GenericDAO.java:763) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.datasource.GenericHelperDAO.findListIteratorByCondition(GenericHelperDAO.java:140) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.GenericDelegator.find(GenericDelegator.java:1775) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.GenericDelegator.findList(GenericDelegator.java:1811) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.util.EntityQuery.query(EntityQuery.java:451) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.util.EntityQuery.queryList(EntityQuery.java:376) [ofbiz-entity.jar:?]
	at org.ofbiz.service.job.JobManager.reloadCrashedJobs(JobManager.java:294) [ofbiz-service.jar:?]
	at org.ofbiz.service.job.JobPoller$JobManagerPoller.run(JobPoller.java:223) [ofbiz-service.jar:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_161]
Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_161]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_161]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_161]
	at java.lang.Class.forName0(Native Method) ~[?:1.8.0_161]
	at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_161]
	at org.ofbiz.entity.connection.DBCPConnectionFactory.getConnection(DBCPConnectionFactory.java:88) ~[ofbiz-entity.jar:?]
	... 12 more
2018-06-26 14:01:00,168 |OFBiz-JobPoller      |JobManager                    |W| Unable to load crashed jobs
org.ofbiz.entity.GenericEntityException: org.ofbiz.entity.GenericEntityException: com.mysql.jdbc.Driver (com.mysql.jdbc.Driver) (com.mysql.jdbc.Driver (com.mysql.jdbc.Driver))
	at org.ofbiz.entity.GenericDelegator.findList(GenericDelegator.java:1831) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.util.EntityQuery.query(EntityQuery.java:451) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.util.EntityQuery.queryList(EntityQuery.java:376) ~[ofbiz-entity.jar:?]
	at org.ofbiz.service.job.JobManager.reloadCrashedJobs(JobManager.java:294) [ofbiz-service.jar:?]
	at org.ofbiz.service.job.JobPoller$JobManagerPoller.run(JobPoller.java:223) [ofbiz-service.jar:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_161]
Caused by: org.ofbiz.entity.GenericEntityException: com.mysql.jdbc.Driver (com.mysql.jdbc.Driver)
	at org.ofbiz.entity.connection.DBCPConnectionFactory.getConnection(DBCPConnectionFactory.java:91) ~[ofbiz-entity.jar:?]
	at org.ofbiz.geronimo.GeronimoTransactionFactory.getConnection(GeronimoTransactionFactory.java:83) ~[ofbiz-geronimo.jar:?]
	at org.ofbiz.entity.jdbc.SQLProcessor.getConnection(SQLProcessor.java:260) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.jdbc.SQLProcessor.prepareStatement(SQLProcessor.java:366) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.datasource.GenericDAO.selectListIteratorByCondition(GenericDAO.java:763) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.datasource.GenericHelperDAO.findListIteratorByCondition(GenericHelperDAO.java:140) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.GenericDelegator.find(GenericDelegator.java:1775) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.GenericDelegator.findList(GenericDelegator.java:1811) ~[ofbiz-entity.jar:?]
	... 5 more
Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_161]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_161]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_161]
	at java.lang.Class.forName0(Native Method) ~[?:1.8.0_161]
	at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_161]
	at org.ofbiz.entity.connection.DBCPConnectionFactory.getConnection(DBCPConnectionFactory.java:88) ~[ofbiz-entity.jar:?]
	at org.ofbiz.geronimo.GeronimoTransactionFactory.getConnection(GeronimoTransactionFactory.java:83) ~[ofbiz-geronimo.jar:?]
	at org.ofbiz.entity.jdbc.SQLProcessor.getConnection(SQLProcessor.java:260) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.jdbc.SQLProcessor.prepareStatement(SQLProcessor.java:366) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.datasource.GenericDAO.selectListIteratorByCondition(GenericDAO.java:763) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.datasource.GenericHelperDAO.findListIteratorByCondition(GenericHelperDAO.java:140) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.GenericDelegator.find(GenericDelegator.java:1775) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.GenericDelegator.findList(GenericDelegator.java:1811) ~[ofbiz-entity.jar:?]
	... 5 more
2018-06-26 14:01:00,171 |OFBiz-JobPoller      |DBCPConnectionFactory         |E| null
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_161]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_161]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_161]
	at java.lang.Class.forName0(Native Method) ~[?:1.8.0_161]
	at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_161]
	at org.ofbiz.entity.connection.DBCPConnectionFactory.getConnection(DBCPConnectionFactory.java:88) [ofbiz-entity.jar:?]
	at org.ofbiz.geronimo.GeronimoTransactionFactory.getConnection(GeronimoTransactionFactory.java:83) [ofbiz-geronimo.jar:?]
	at org.ofbiz.entity.jdbc.SQLProcessor.getConnection(SQLProcessor.java:260) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.jdbc.SQLProcessor.prepareStatement(SQLProcessor.java:366) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.datasource.GenericDAO.selectListIteratorByCondition(GenericDAO.java:763) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.datasource.GenericHelperDAO.findListIteratorByCondition(GenericHelperDAO.java:140) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.GenericDelegator.find(GenericDelegator.java:1775) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.util.EntityQuery.queryIterator(EntityQuery.java:392) [ofbiz-entity.jar:?]
	at org.ofbiz.service.job.JobManager.poll(JobManager.java:194) [ofbiz-service.jar:?]
	at org.ofbiz.service.job.JobPoller$JobManagerPoller.run(JobPoller.java:224) [ofbiz-service.jar:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_161]
2018-06-26 14:01:00,171 |OFBiz-JobPoller      |JobManager                    |W| Exception thrown while polling JobSandbox: 
org.ofbiz.entity.GenericEntityException: com.mysql.jdbc.Driver (com.mysql.jdbc.Driver)
	at org.ofbiz.entity.connection.DBCPConnectionFactory.getConnection(DBCPConnectionFactory.java:91) ~[ofbiz-entity.jar:?]
	at org.ofbiz.geronimo.GeronimoTransactionFactory.getConnection(GeronimoTransactionFactory.java:83) ~[ofbiz-geronimo.jar:?]
	at org.ofbiz.entity.jdbc.SQLProcessor.getConnection(SQLProcessor.java:260) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.jdbc.SQLProcessor.prepareStatement(SQLProcessor.java:366) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.datasource.GenericDAO.selectListIteratorByCondition(GenericDAO.java:763) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.datasource.GenericHelperDAO.findListIteratorByCondition(GenericHelperDAO.java:140) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.GenericDelegator.find(GenericDelegator.java:1775) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.util.EntityQuery.queryIterator(EntityQuery.java:392) ~[ofbiz-entity.jar:?]
	at org.ofbiz.service.job.JobManager.poll(JobManager.java:194) [ofbiz-service.jar:?]
	at org.ofbiz.service.job.JobPoller$JobManagerPoller.run(JobPoller.java:224) [ofbiz-service.jar:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_161]
Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_161]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_161]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_161]
	at java.lang.Class.forName0(Native Method) ~[?:1.8.0_161]
	at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_161]
	at org.ofbiz.entity.connection.DBCPConnectionFactory.getConnection(DBCPConnectionFactory.java:88) ~[ofbiz-entity.jar:?]
	... 10 more
2018-06-26 14:01:30,173 |OFBiz-JobPoller      |DBCPConnectionFactory         |E| null
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_161]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_161]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_161]
	at java.lang.Class.forName0(Native Method) ~[?:1.8.0_161]
	at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_161]
	at org.ofbiz.entity.connection.DBCPConnectionFactory.getConnection(DBCPConnectionFactory.java:88) [ofbiz-entity.jar:?]
	at org.ofbiz.geronimo.GeronimoTransactionFactory.getConnection(GeronimoTransactionFactory.java:83) [ofbiz-geronimo.jar:?]
	at org.ofbiz.entity.jdbc.SQLProcessor.getConnection(SQLProcessor.java:260) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.jdbc.SQLProcessor.prepareStatement(SQLProcessor.java:366) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.datasource.GenericDAO.selectListIteratorByCondition(GenericDAO.java:763) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.datasource.GenericHelperDAO.findListIteratorByCondition(GenericHelperDAO.java:140) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.GenericDelegator.find(GenericDelegator.java:1775) [ofbiz-entity.jar:?]
	at org.ofbiz.entity.util.EntityQuery.queryIterator(EntityQuery.java:392) [ofbiz-entity.jar:?]
	at org.ofbiz.service.job.JobManager.poll(JobManager.java:194) [ofbiz-service.jar:?]
	at org.ofbiz.service.job.JobPoller$JobManagerPoller.run(JobPoller.java:224) [ofbiz-service.jar:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_161]
2018-06-26 14:01:30,173 |OFBiz-JobPoller      |JobManager                    |W| Exception thrown while polling JobSandbox: 
org.ofbiz.entity.GenericEntityException: com.mysql.jdbc.Driver (com.mysql.jdbc.Driver)
	at org.ofbiz.entity.connection.DBCPConnectionFactory.getConnection(DBCPConnectionFactory.java:91) ~[ofbiz-entity.jar:?]
	at org.ofbiz.geronimo.GeronimoTransactionFactory.getConnection(GeronimoTransactionFactory.java:83) ~[ofbiz-geronimo.jar:?]
	at org.ofbiz.entity.jdbc.SQLProcessor.getConnection(SQLProcessor.java:260) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.jdbc.SQLProcessor.prepareStatement(SQLProcessor.java:366) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.datasource.GenericDAO.selectListIteratorByCondition(GenericDAO.java:763) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.datasource.GenericHelperDAO.findListIteratorByCondition(GenericHelperDAO.java:140) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.GenericDelegator.find(GenericDelegator.java:1775) ~[ofbiz-entity.jar:?]
	at org.ofbiz.entity.util.EntityQuery.queryIterator(EntityQuery.java:392) ~[ofbiz-entity.jar:?]
	at org.ofbiz.service.job.JobManager.poll(JobManager.java:194) [ofbiz-service.jar:?]
	at org.ofbiz.service.job.JobPoller$JobManagerPoller.run(JobPoller.java:224) [ofbiz-service.jar:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_161]
Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_161]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_161]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_161]
	at java.lang.Class.forName0(Native Method) ~[?:1.8.0_161]
	at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_161]
	at org.ofbiz.entity.connection.DBCPConnectionFactory.getConnection(DBCPConnectionFactory.java:88) ~[ofbiz-entity.jar:?]
	... 10 more
配置文件是ok的，缺少mysql驱动mysql-connector-java-5.1.25.jar

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java web项目报错： java.lang.ClassNotFoundException ： com.mysql.jdbc.Driver
zdl177的博客
04-29 526
问题描述：     java web 项目，导好 jar 包后，提示错误：     java.lang.ClassNotFoundException：com.mysql.jdbc.Driver 导 jar 包过程：     操作如下图所示： ![步骤1](https://img-blog.csdnimg.cn/20210429125149764.png?x-oss-proce
java.lang.ClassNotFoundException: com.mysql.cj.jdbc.Driver
qq_38454176的博客
02-04 4698
Caused by: java.lang.ClassNotFoundException: com.mysql.cj.jdbc.Driver at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1308) at org.apache.catalina.loader.Webap...
JDBC驱动加载失败，异常：java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
11-07
JDBC驱动加载失败，异常：java.lang.ClassNotFoundException: com.mysql.jdbc.Driver通常是由于缺少MySQL JDBC驱动程序或驱动程序版本不兼容所致。解决此问题的方法是确保已正确安装MySQL JDBC驱动程序并将其添加到...
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