org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection

这个问题困扰许久，许久。原来只是data source的properties引入文件，el表达式前必须加jdbc

原文解决参考：http://blog.csdn.net/liwuyang2013/article/details/25986597

org.apache.ibatis.exceptions.PersistenceException:
### Error querying database.  Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Access denied for user 'root '@'localhost' (using password: YES))
### The error may exist in mapper/CustomerMapper.xml
### The error may involve com.zhexiang.mybatis_springmvc.model.selectCustomerByID
### The error occurred while executing a query
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Access denied for user 'root '@'localhost' (using password: YES))at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:26)at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:111)at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102)at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:66)at com.zhexiang.mybatis_springmvc.dao.impl.CustomerDaoImpl.selectCustomerByID(CustomerDaoImpl.java:18)at com.zhexiang.mybatis_springmvc.dao.impl.CustomerDaoImplTest.testSelectCustomerByID(CustomerDaoImplTest.java:37)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)at java.lang.reflect.Method.invoke(Method.java:597)at junit.framework.TestCase.runTest(TestCase.java:176)at junit.framework.TestCase.runBare(TestCase.java:141)at junit.framework.TestResult$1.protect(TestResult.java:122)at junit.framework.TestResult.runProtected(TestResult.java:142)at junit.framework.TestResult.run(TestResult.java:125)at junit.framework.TestCase.run(TestCase.java:129)at junit.framework.TestSuite.runTest(TestSuite.java:255)at junit.framework.TestSuite.run(TestSuite.java:250)at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:84)at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Access denied for user 'root '@'localhost' (using password: YES))at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:80)at org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:81)at org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:67)at org.apache.ibatis.executor.BaseExecutor.getConnection(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)... 23 more
Caused by: org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Access denied for user 'root '@'localhost' (using password: YES))at org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1549)at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1388)at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044)at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)... 33 more
Caused by: java.sql.SQLException: Access denied for user 'root '@'localhost' (using password: YES)at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074)at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4120)at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4052)at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:925)at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1704)at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1250)at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2465)at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2498)at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2283)at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:822)at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)at java.lang.reflect.Constructor.newInstance(Constructor.java:513)at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:404)at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:317)at org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38)at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:582)at org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:1556)at org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1545)... 37 more

出现以上错误原因是：数据源的错误配置：

错误的jdbc.properties

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=gbk
username=root
password=root

错误的spring配置文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"><!--  config db property file location  --><bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"><property name="locations" value="classpath:jdbc.properties"/></bean><bean id="dataSource" destroy-method="close" class="org.apache.commons.dbcp.BasicDataSource" ><property name="driverClassName" value="${driver}"/><property name="url" value="${url}" /><property name="username" value="${username}" /><property name="password" value="${password}" /></beans>

正确的jdbc.properties配置：

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=gbk
jdbc.username=root
jdbc.password=root

Spring4.0.4 官方文档数据源配置：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context"xsi:schemaLocation="
    http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-3.0.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-3.0.xsd"><!-- Scans within the base package of the application for @Components to configure as beans --><context:component-scan base-package="org.springframework.docs.test" /><bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"><property name="driverClassName" value="${jdbc.driverClassName}"/><property name="url" value="${jdbc.url}"/><property name="username" value="${jdbc.username}"/><property name="password" value="${jdbc.password}"/></bean><context:property-placeholder location="jdbc.properties"/></beans>

麦田里的Cracker12-25 10:49
叼叼叼，楼主我都想请你吃饭了，这个问题困扰了我将近三天时间。jdbc什么我都配好了，就是出不来，网上的例子也大都千律一篇。赞

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