maven项目用tomcat启动一直无法连接数据库!!Could not get JDBC Connection [问题点数:150分]

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Could not get JDBC connection

想学习下JavaWeb,手头有2017年有活动的时候买的一本书,还是全彩的,应该很适合我这种菜鸟技术渣。 只可惜照着书搭建了一套Web环境,代码和db脚本都是拷贝的光盘里的,也反复检查了<em>数据库</em>的<em>连接</em>情况,Navicat可以正常连,涉及到的两个<em>数据库</em>配置文件里面的url、端口、密码应该都是对的,反复折腾了一晚上没搞定,临了百度一顿乱搜,看到一个帖子(https://www.2cto.com/d...

Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cann

<em>Could</em> not get <em>JDBC</em> <em>Connection</em>; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create Poolable<em>Connection</em>Factory (Access denied for user '16572'@'localhost' 试遍了网上的方法都没有解决我的问题,...

数据库连接异常,无法获得Jdbc连接异常

求大神告诉原因以及解决办法,谢谢!

使用dbcp连接池的时候 org.springframework.jdbc.CannotGetJdbcConnectionException:

异常如下: 五月 07, 2017 5:30:03 下午 org.apache.catalina.core.StandardWrapperValve invoke 严重: Servlet.servic

Could not get JDBC Connection的错误

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Linux下web项目报错Could not get JDBC Connection

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服务器报错问题。org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get

org.springframework.jdbc.CannotGetJdbc<em>Connection</em>Exception: <em>Could</em> not get <em>JDBC</em> <em>Connection</em>; nested exc

Could not get JDBC Connection; nested exception is org.apache.tomcat.jdbc.pool.PoolExhaustedExceptio

&amp;lt;bean id=&quot;calMysqlDataSource&quot; class=&quot;org.apache.<em>tomcat</em>.jdbc.pool.DataSource&quot;&amp;gt; &amp;lt;property name=&quot;driverClassName&quot; value=&quot;${jdbc.driver}&quot; /&amp;gt; &amp;lt;property name=&quot;url&quot; value=&quot;$

Could not get JDBC Connection

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbc<em>Connection</em>Exception: <em>Could</em> not get <em>JDBC</em> <em>Connection</em>; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot load <em>JDBC</em> driver class 'com.microsoft.sqlserver.jdbc.SQLServerDriver' ### The error may exist in cn/drzk/wanda/cinema/dao/form/dao/TicketsFromDao.java (best guess) ### The error may involve cn.drzk.wanda.cinema.dao.form.dao.TicketsFromDao.count ### The error occurred while executing a query ### Cause: org.springframework.jdbc.CannotGetJdbc<em>Connection</em>Exception: <em>Could</em> not get <em>JDBC</em> <em>Connection</em>; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot load <em>JDBC</em> driver class 'com.microsoft.sqlserver.jdbc.SQLServerDriver'

Could not get JDBC Connection的问题,请高手指点一下,谢谢!!!

使用软件时,回车执行,提示:“<em>Could</em> not get <em>JDBC</em> <em>Connection</em>;nested exception is org.apache.commons.dbcp.SQLNestedEx

tomcat启动连接数据库被拒绝

在刚开始配置一个<em>项目</em>中,<em>启动</em><em>tomcat</em>能够<em>连接</em>上,但是<em>一直</em>报 <em>连接</em>被拒绝. 搞了一天多的时间, 下面是贴图: 还有: 字面意思就是<em>连接</em>不上oracle<em>数据库</em>, 但是查了配置文件,查了端口占用,查了ip地址,以及依赖的<em>连接</em>池jar包,问题依然没有解决,最后将<em>tomcat</em> 目录下的webapp文件不相关的<em>项目</em>删除然后重新编译, 通过重启服务器, OK ,没有问题. 问题是这个不同的<em>项目</em>文件会有

Could not get JDBC Connection; nested exception is java.sql.SQLException: Access denied for user 'ro

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用的德鲁伊<em>连接</em>池,先看applicationContext-dao.xml里的配置 ``` ``` 这样的话,控制台输出: 2017-12-28 12:43:58,209DEBUG[org.springframework.web.servlet.DispatcherServlet] - 2017-12-28 12:43:58,214DEBUG[org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping] - 2017-12-28 12:43:58,221DEBUG[org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping] - 2017-12-28 12:43:58,221DEBUG[org.springframework.beans.factory.support.DefaultListableBeanFactory] - 2017-12-28 12:43:58,222DEBUG[org.springframework.web.servlet.DispatcherServlet] - 2017-12-28 12:43:58,317DEBUG[org.mybatis.spring.SqlSessionUtils] - 2017-12-28 12:43:58,335DEBUG[org.mybatis.spring.SqlSessionUtils] - 2017-12-28 12:43:58,366DEBUG[org.springframework.jdbc.datasource.DataSourceUtils] - 2017-12-28 12:43:58,447INFO[com.alibaba.druid.pool.DruidDataSource] - <em>一直</em>显示等待,后来加了个maxWait属性,时间是5秒,然后才开始报错,如下: 2017-12-28 12:47:41,261DEBUG[org.springframework.web.servlet.DispatcherServlet] - 2017-12-28 12:47:41,264DEBUG[org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping] - 2017-12-28 12:47:41,269DEBUG[org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping] - 2017-12-28 12:47:41,269DEBUG[org.springframework.beans.factory.support.DefaultListableBeanFactory] - 2017-12-28 12:47:41,270DEBUG[org.springframework.web.servlet.DispatcherServlet] - 2017-12-28 12:47:41,338DEBUG[org.mybatis.spring.SqlSessionUtils] - 2017-12-28 12:47:41,348DEBUG[org.mybatis.spring.SqlSessionUtils] - 2017-12-28 12:47:41,378DEBUG[org.springframework.jdbc.datasource.DataSourceUtils] - 2017-12-28 12:47:41,472INFO[com.alibaba.druid.pool.DruidDataSource] - 2017-12-28 12:47:46,473WARN[com.alibaba.druid.pool.DruidDataSource] - 2017-12-28 12:47:51,476DEBUG[org.mybatis.spring.SqlSessionUtils] - 2017-12-28 12:47:51,476DEBUG[org.mybatis.spring.SqlSessionUtils] - 2017-12-28 12:47:51,476DEBUG[org.mybatis.spring.SqlSessionUtils] - 2017-12-28 12:47:51,476DEBUG[org.springframework.jdbc.datasource.DataSourceTransactionManager] - 2017-12-28 12:47:51,478DEBUG[org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver] - <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> and ${criterion.condition} and ${criterion.condition} #{criterion.value} and ${criterion.condition} #{criterion.value} and #{criterion.secondValue} and ${criterion.condition} #{listItem} and ${criterion.condition} and ${criterion.condition} #{criterion.value} and ${criterion.condition} #{criterion.value} and #{criterion.secondValue} and ${criterion.condition} #{listItem} id, title, sell_point, price, num, barcode, image, cid, status, created, updated select distinct from tb_item order by ${orderByClause} select from tb_item where id = #{id,jdbcType=BIGINT} delete from tb_item where id = #{id,jdbcType=BIGINT} delete from tb_item insert into tb_item (id, title, sell_point, price, num, barcode, image, cid, status, created, updated) values (#{id,jdbcType=BIGINT}, #{title,jdbcType=VARCHAR}, #{sellPoint,jdbcType=VARCHAR}, #{price,jdbcType=BIGINT}, #{num,jdbcType=INTEGER}, #{barcode,jdbcType=VARCHAR}, #{image,jdbcType=VARCHAR}, #{cid,jdbcType=BIGINT}, #{status,jdbcType=TINYINT}, #{created,jdbcType=TIMESTAMP}, #{updated,jdbcType=TIMESTAMP}) insert into tb_item id, title, sell_point, price, num, barcode, image, cid, status, created, updated, #{id,jdbcType=BIGINT}, #{title,jdbcType=VARCHAR}, #{sellPoint,jdbcType=VARCHAR}, #{price,jdbcType=BIGINT}, #{num,jdbcType=INTEGER}, #{barcode,jdbcType=VARCHAR}, #{image,jdbcType=VARCHAR}, #{cid,jdbcType=BIGINT}, #{status,jdbcType=TINYINT}, #{created,jdbcType=TIMESTAMP}, #{updated,jdbcType=TIMESTAMP}, select count(*) from tb_item update tb_item id = #{record.id,jdbcType=BIGINT}, title = #{record.title,jdbcType=VARCHAR}, sell_point = #{record.sellPoint,jdbcType=VARCHAR}, price = #{record.price,jdbcType=BIGINT}, num = #{record.num,jdbcType=INTEGER}, barcode = #{record.barcode,jdbcType=VARCHAR}, image = #{record.image,jdbcType=VARCHAR}, cid = #{record.cid,jdbcType=BIGINT}, status = #{record.status,jdbcType=TINYINT}, created = #{record.created,jdbcType=TIMESTAMP}, updated = #{record.updated,jdbcType=TIMESTAMP}, update tb_item set id = #{record.id,jdbcType=BIGINT}, title = #{record.title,jdbcType=VARCHAR}, sell_point = #{record.sellPoint,jdbcType=VARCHAR}, price = #{record.price,jdbcType=BIGINT}, num = #{record.num,jdbcType=INTEGER}, barcode = #{record.barcode,jdbcType=VARCHAR}, image = #{record.image,jdbcType=VARCHAR}, cid = #{record.cid,jdbcType=BIGINT}, status = #{record.status,jdbcType=TINYINT}, created = #{record.created,jdbcType=TIMESTAMP}, updated = #{record.updated,jdbcType=TIMESTAMP} update tb_item title = #{title,jdbcType=VARCHAR}, sell_point = #{sellPoint,jdbcType=VARCHAR}, price = #{price,jdbcType=BIGINT}, num = #{num,jdbcType=INTEGER}, barcode = #{barcode,jdbcType=VARCHAR}, image = #{image,jdbcType=VARCHAR}, cid = #{cid,jdbcType=BIGINT}, status = #{status,jdbcType=TINYINT}, created = #{created,jdbcType=TIMESTAMP}, updated = #{updated,jdbcType=TIMESTAMP}, where id = #{id,jdbcType=BIGINT} update tb_item set title = #{title,jdbcType=VARCHAR}, sell_point = #{sellPoint,jdbcType=VARCHAR}, price = #{price,jdbcType=BIGINT}, num = #{num,jdbcType=INTEGER}, barcode = #{barcode,jdbcType=VARCHAR}, image = #{image,jdbcType=VARCHAR}, cid = #{cid,jdbcType=BIGINT}, status = #{status,jdbcType=TINYINT}, created = #{created,jdbcType=TIMESTAMP}, updated = #{updated,jdbcType=TIMESTAMP} where id = #{id,jdbcType=BIGINT} ``` 上面是逆向工程的mapper,后来我自己写了个TestMapper,还是出现同样的问题: ![图片说明](https://img-ask.csdn.net/upload/201712/28/1514454719_724728.png) 另外navicat访问<em>数据库</em>没问题。我想会不会是<em>连接</em>池配置的问题,也许那些配置可能导致这种情况??

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使用jdbc链接sqlserver 2008出现Could not get JDBC Connection项目可以启动,但不能访问数据库

<em>JDBC</em>:![图片说明](https://img-ask.csdn.net/upload/201909/03/1567504614_704721.png) mybatis:![图片说明](https://img-ask.csdn.net/upload/201909/03/1567504645_758618.png) jar包没问题,可以正常<em>连接</em>2005的<em>数据库</em>,链接这个2008的就不行了,求助各位大神啊 报错代码:### The error occurred while executing a query ### Cause: org.springframework.jdbc.CannotGetJdbc<em>Connection</em>Exception: <em>Could</em> not get <em>JDBC</em> <em>Connection</em>; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create Poolable<em>Connection</em>Factory (I/O Error: <em>Connection</em> reset)] with root cause java.net.SocketException: <em>Connection</em> reset at java.net.SocketInputStream.read(SocketInputStream.java:209) at java.net.SocketInputStream.read(SocketInputStream.java:141) at java.io.DataInputStream.readFully(DataInputStream.java:195) at java.io.DataInputStream.readFully(DataInputStream.java:169) at net.sourceforge.jtds.jdbc.SharedSocket.readPacket(SharedSocket.java:842) at net.sourceforge.jtds.jdbc.SharedSocket.getNetPacket(SharedSocket.java:723) at net.sourceforge.jtds.jdbc.ResponseStream.getPacket(ResponseStream.java:466) at net.sourceforge.jtds.jdbc.ResponseStream.read(ResponseStream.java:103) at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2206) at net.sourceforge.jtds.jdbc.TdsCore.login(TdsCore.java:603) at net.sourceforge.jtds.jdbc.<em>Connection</em><em>JDBC</em>2.(<em>Connection</em><em>JDBC</em>2.java:357) at net.sourceforge.jtds.jdbc.<em>Connection</em><em>JDBC</em>3.(<em>Connection</em><em>JDBC</em>3.java:50) at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:184) at org.apache.commons.dbcp.Driver<em>Connection</em>Factory.create<em>Connection</em>(Driver<em>Connection</em>Factory.java:38) at org.apache.commons.dbcp.Poolable<em>Connection</em>Factory.makeObject(Poolable<em>Connection</em>Factory.java:582) at org.apache.commons.dbcp.BasicDataSource.validate<em>Connection</em>Factory(BasicDataSource.java:1556) at org.apache.commons.dbcp.BasicDataSource.createPoolable<em>Connection</em>Factory(BasicDataSource.java:1545) at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1388) at org.apache.commons.dbcp.BasicDataSource.get<em>Connection</em>(BasicDataSource.java:1044) at org.springframework.jdbc.datasource.DataSourceUtils.doGet<em>Connection</em>(DataSourceUtils.java:111) at org.springframework.jdbc.datasource.DataSourceUtils.get<em>Connection</em>(DataSourceUtils.java:77) at org.mybatis.spring.transaction.SpringManagedTransaction.open<em>Connection</em>(SpringManagedTransaction.java:84) at org.mybatis.spring.transaction.SpringManagedTransaction.get<em>Connection</em>(SpringManagedTransaction.java:70) at org.apache.ibatis.executor.BaseExecutor.get<em>Connection</em>(BaseExecutor.java:336) at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:84) at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:62) at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:324) at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156) at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109) at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:434) at com.sun.proxy.$Proxy17.selectList(Unknown Source) at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:231) at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:137) at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:75) at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:59) at com.sun.proxy.$Proxy21.getproList(Unknown Source) at com.ytxd.service.DuplicateCheck.DuplicateCheckServiceImpl.getproList(DuplicateCheckServiceImpl.java:333) at com.ytxd.controller.DuplicateCheck.DuplicateCheck_Controller.GetList(DuplicateCheck_Controller.java:44) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) at javax.servlet.http.HttpServlet.service(HttpServlet.java:648) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) at org.apache.<em>tomcat</em>.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:474) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349) at org.apache.coyote.http11.Http11Proce ssor.service(Http11Processor.java:783) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$<em>Connection</em>Handler.process(AbstractProtocol.java:789) at org.apache.<em>tomcat</em>.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1437) at org.apache.<em>tomcat</em>.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.<em>tomcat</em>.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745)

maven项目连接sqlserver数据库配置

引入jar &lt;!--sqlserverdriver--&gt;&lt;dependency&gt;&lt;groupId&gt;net.sourceforge.jtds&lt;/groupId&gt;&lt;artifactId&gt;jtds&lt;/artifactId&gt;&lt;version&gt;1.2.4&lt;/ver...

maven项目连接数据库失败原因之一

今天测试<em>maven</em><em>项目</em>的时候,程序<em>一直</em>卡在UserService userService = new UserService()上。检查了几遍UserService这个类都没发现问题,然后系统也没报错。我就开始测试Dbconnetion这个类,这是封装了<em>数据库</em><em>连接</em>和关闭操作的一个类,我先调用这个类的Get<em>Connection</em>方法 。<em>Connection</em> connection = Dbconnecti

搭建maven项目无法连接数据库问题

<em>maven</em>框架搭建错误:HTTP Status 500 - Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: type Exce...

tomcat启动项目打不开数据库连接

![图片说明](https://img-ask.csdn.net/upload/201603/06/1457236945_551232.png) ![图片说明](https://img-ask.csdn.net/upload/201603/06/1457236961_926494.png) ![图片说明](https://img-ask.csdn.net/upload/201603/06/1457236972_983609.png) ![图片说明](https://img-ask.csdn.net/upload/201603/06/1457236981_239248.png) 之前没出现过问题,一段时间没用,就<em>一直</em>打不开<em>数据库</em><em>连接</em>,今天重装了<em>数据库</em>也不行。<em>数据库</em>不在本机,不过我用navicat和jdbc的方式是可以<em>连接</em>的

eclipse+tomcat搭建服务器遇到的坑:运行整个项目不能连接数据库,单独的测试类却能够连接数据库

我的<em>连接</em><em>数据库</em>类中的URL长这样的: 这个类其他的代码都没有问题,因为我用测试类测试过这个<em>连接</em>数库类,能够成功<em>连接</em>。mysql-conntector版本和mysql版本也能够兼容,其他的类也都没问题,因为整个<em>项目</em>能够运行。但是运行<em>项目</em>一涉及<em>数据库</em>就报错。我的之前在捕获异常的时候在catch块中只是用system .out.println(“<em>数据库</em><em>连接</em>失败!”);输出了错误,并没有报错错误的原因,...

springboot中通过mybatis访问数据,打成jar包后,就出现数据库url未空的异常。

问题是这样的,我刚接触springboot,做了一个springboot的工程,需要通过mybatis访问oracle<em>数据库</em>,<em>数据库</em>的<em>连接</em>信息写在application.properties文件的spring.datasource中。在eclipse上直接运行程序,<em>数据库</em>访问正常,但是打成jar包后,读数据出现异常: org.springframework.jdbc.CannotGetJdbc<em>Connection</em>Exception: <em>Could</em> not get <em>JDBC</em> <em>Connection</em>; nested exception is java.sql.SQLException: The url cannot be null 就不能读取<em>数据库</em>。 我解开jar包看,Application.properties也在classes路径下的。 另外,application类中设置数据源是这么写的: ``` @Bean @ConfigurationProperties(prefix = "spring.datasource") public DataSource dataSource() { DataSource dataSource = new org.apache.<em>tomcat</em>.jdbc.pool.DataSource(); System.out.println(dataSource.getUrl()); return dataSource; } @Bean public SqlSessionFactory sqlSessionFactoryBean() throws Exception { SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean(); sqlSessionFactoryBean.setDataSource(dataSource()); ``` 我把dataSource里面的url打印出来看,不管是在eclipse运行的时候,还是jar包运行的时候都是null,但eclipse运行时虽然是null,但功能正常。 网上搜索了很多帖子没有能解决这个问题,请专家帮忙看看也。谢谢。

Could not get JDBC Connection; com.mysql.cj.jdbc.Driver?

四月 17, 2019 2:15:44 上午 org.apache.catalina.core.StandardWrapperValve invoke 严重: Servlet.service() for servlet [taotao-manager] in context with path [] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbc<em>Connection</em>Exception: <em>Could</em> not get <em>JDBC</em> <em>Connection</em>; nested exception is java.sql.SQLException: com.mysql.cj.jdbc.Driver ### The error may exist in com/taotao/mapper/TbItemMapper.xml ### The error may involve com.taotao.mapper.TbItemMapper.selectByPrimaryKey ### The error occurred while executing a query ### Cause: org.springframework.jdbc.CannotGetJdbc<em>Connection</em>Exception: <em>Could</em> not get <em>JDBC</em> <em>Connection</em>; nested exception is java.sql.SQLException: com.mysql.cj.jdbc.Driver] with root cause java.lang.ClassNotFoundException: com.mysql.cj.jdbc.Driver at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1702) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at com.alibaba.druid.util.JdbcUtils.createDriver(JdbcUtils.java:518) at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:583) at com.alibaba.druid.pool.DruidDataSource.get<em>Connection</em>(DruidDataSource.java:915) at com.alibaba.druid.pool.DruidDataSource.get<em>Connection</em>(DruidDataSource.java:911) at com.alibaba.druid.pool.DruidDataSource.get<em>Connection</em>(DruidDataSource.java:98) at org.springframework.jdbc.datasource.DataSourceUtils.doGet<em>Connection</em>(DataSourceUtils.java:111) at org.springframework.jdbc.datasource.DataSourceUtils.get<em>Connection</em>(DataSourceUtils.java:77) at org.mybatis.spring.transaction.SpringManagedTransaction.open<em>Connection</em>(SpringManagedTransaction.java:81) at org.mybatis.spring.transaction.SpringManagedTransaction.get<em>Connection</em>(SpringManagedTransaction.java:67) at org.apache.ibatis.executor.BaseExecutor.get<em>Connection</em>(BaseExecutor.java:279) at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:72) at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:59) at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:267) at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:137) at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:96) at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:77) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:108) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:66) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:358) at com.sun.proxy.$Proxy30.selectOne(Unknown Source) at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:163) at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:68) at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52) at com.sun.proxy.$Proxy31.selectByPrimaryKey(Unknown Source) at com.taotao.service.impl.ItemServiceImpl.getItemById(ItemServiceImpl.java:24) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99) at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:267) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207) at com.sun.proxy.$Proxy34.getItemById(Unknown Source) at com.taotao.controller.ItemController.getItemById(ItemController.java:27) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:777) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:706) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857) at javax.servlet.http.HttpServlet.service(HttpServlet.java:621) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842) at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.<em>tomcat</em>.websocket.server.WsFilter.doFilter(WsFilter.java:51) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041) at org.apache.coyote.AbstractProtocol$Abstract<em>Connection</em>Handler.process(AbstractProtocol.java:603) at org.apache.<em>tomcat</em>.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at 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org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:84) at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:62) at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:324) at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156) at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109) at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:77) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433) at com.sun.proxy.$Proxy13.selectOne(Unknown Source) at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:166) at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:82) at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:59) at com.sun.proxy.$Proxy14.selectAdminByInfo(Unknown Source) at cn.java.demo.dao.impl.CommAdminDaoImpl.selectAdminByInfo(CommAdminDaoImpl.java:21) at cn.java.demo.logic.impl.CommAdminLogicImpl.selectAdminByInfo(CommAdminLogicImpl.java:27) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98) at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207) at com.sun.proxy.$Proxy18.selectAdminByInfo(Unknown Source) at cn.java.demo.controller.CommAdminController.admin(CommAdminController.java:33) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:175) at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:446) at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:434) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:938) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:870) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852) at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837) at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.<em>tomcat</em>.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$<em>Connection</em>Handler.process(AbstractProtocol.java:790) at org.apache.<em>tomcat</em>.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459) at org.apache.<em>tomcat</em>.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.<em>tomcat</em>.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748)

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org.springframework.jdbc.CannotGetJdbcConnectionException

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求救.jdbc.CannotGetJdbcConnectionException

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Could not open connection

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