Access denied for user 'xy'@'localhost' (using password: YES)解决办法

今天配置sping+spingmvc+mybatis时，在配置到druid数据源的时候报了这个错误，上网查了一下

总结一下原因：大多数都是 可能是连接数据库的用户名或者密码错误，但是我的用户名，密码，和url都是正确的。因为是用的框架，自己就动手试试能不能获取到值，结果发现了问题：如下

下面是我配置sping-mybatis.xml的文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:c="http://www.springframework.org/schema/c"
xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd"> 
<!-- 引入jdbc的基础配置文件 ：jdbc.properties -->
<context:property-placeholder location="classpath:jdbc.properties"/>

<!-- 配置druid数据源 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<!-- <property name="driver" value="${driverClassName}"/> -->
<property name="url" value="${url}"/>
<property name="username" value ="${username}"/><!-- ${username} -->
<property name="password" value="${password}"/><!-- ${password} -->
</bean>

<!-- 使用spring管理事务 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<constructor-arg index="0" ref="dataSource"/>
</bean>

<!-- 整合mybaits  -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="mapperLocations" value="classpath:cn/cupcat/mapper/*.xml"/>
</bean>

<bean id="mapperScannerConfigurer"  class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="cn.cupcat.dao"/>
</bean>

<bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate" >
<constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>

</beans>

下面是jdbc.properties的文件内容：

driverClassName=com.mysql.jdbc.Driver
username=root
password=123456
initialSize=1
maxActive=20
maxIdle=2
minIdle=1
url=jdbc\:mysql\://127.0.0.1\:3306/adressbook02?useUnicode\=true&
4000
characterEncoding\=UTF-8

思考了一下发现报错信息，用户名配置的是root 怎么报错的时候会出现xy’@’localhost’ (using password: YES)错误呢，于是我就想了一下，是不是使用SpEL没有获取到用户名呢？于是又在spring-mybatis.xml里面配置了一个student的bean 将username,{password},${url}赋值给student bean 的属性里面在控制器里面输出，看看能不能取到值：

修改后的sping-mybatis.xml

<?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"
xmlns:c="http://www.springframework.org/schema/c"
xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd"> 
<!-- 引入jdbc的基础配置文件 ：jdbc.properties -->
<context:property-placeholder location="classpath:jdbc.properties"/>

<!-- 配置druid数据源 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<!-- <property name="driver" value="${driverClassName}"/> -->
<property name="url" value="${url}"/>
<property name="username" value ="${users}"/><!-- ${username} -->
<property name="password" value="${password}"/><!-- ${password} -->
</bean>
<!--新增加的测试bean  开始-->
<bean id="student" class="cn.cupcat.model.Student">
<property name="sNo" value="${users}"/>
<property name="sName" value="${password}"/>
<property name="qq" value="${url}"/>
</bean>
<!--新增加的测试bean  结束-->

<!-- 使用spring管理事务 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<constructor-arg index="0" ref="dataSource"/>
</bean>

<!-- 整合mybaits  -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="mapperLocations" value="classpath:cn/cupcat/mapper/*.xml"/>
</bean>

<bean id="mapperScannerConfigurer"  class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="cn.cupcat.dao"/>
</bean>

<bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate" >
<constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>

</beans>

控制器代码： StudentController.java

package cn.cupcat.controller;

import javax.annotation.Resource;

import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;

import cn.cupcat.model.Student;
import cn.cupcat.service.StudentService;

@Controller
public class StudentController {

@Resource(name="student")
private Student student ;

@Resource(name = "studentService")
private StudentService studentService;

int num = 0;

@RequestMapping("aa")
public String testUrl(ModelMap modelMap) {

System.out.println("第" + num + "次" +"username:"+ student.getsNo()+"...password:"+student.getsName()+"url:"+student.getQq());

num++;
System.out.println("第" + num + "次" + "......test springmvc .....");
Student stu = studentService.selectByPrimaryKey(2);
modelMap.put("bb", stu);
return "aa";
}
}

结果输出：

第0次username:null…password:123456url:jdbc:mysql://127.0.0.1:3306/adressbook02?useUnicode=true&characterEncoding=UTF-8

第1次……test springmvc …..

结果发现没有获取到${username}的值，于是修改了一下jdbc.properties的文件内容，将username 修改问users ，测试一下：

driverClassName=com.mysql.jdbc.Driver
#修改的地方
users=root
password=123456
initialSize=1
maxActive=20
maxIdle=2
minIdle=1
#url=jdbc\:mysql\://122.13.166.136\:3306_jngczx?useUnicode\=true&characterEncoding\=UTF-8
#url=jdbc\:mysql\://222.194.124.23\:3306/sjjx?useUnicode\=true&characterEncoding\=UTF-8
url=jdbc\:mysql\://127.0.0.1\:3306/adressbook02?useUnicode\=true&characterEncoding\=UTF-8

修改后的spring-mybatis.xml

<?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"
xmlns:c="http://www.springframework.org/schema/c"
xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd"> 
<!-- 引入jdbc的基础配置文件 ：jdbc.properties -->
<context:property-placeholder location="classpath:jdbc.properties"/>

<!-- 配置druid数据源 -->
<bean id="dataS
de58
ource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<!-- <property name="driver" value="${driverClassName}"/> -->
<property name="url" value="${url}"/>
<property name="username" value ="${users}"/><!-- ${username} -->
<property name="password" value="${password}"/><!-- ${password} -->
</bean>

<bean id="student" class="cn.cupcat.model.Student">
<property name="sNo" value="${users}"/>
<property name="sName" value="${password}"/>
<property name="qq" value="${url}"/>
</bean>

<!-- 使用spring管理事务 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<constructor-arg index="0" ref="dataSource"/>
</bean>

<!-- 整合mybaits  -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="mapperLocations" value="classpath:cn/cupcat/mapper/*.xml"/>
</bean>

<bean id="mapperScannerConfigurer"  class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="cn.cupcat.dao"/>
</bean>

<bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate" >
<constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>

</beans>

结果在控制器里面输出了：

第0次username:root…password:123456url:jdbc:mysql://127.0.0.1:3306/adressbook02?useUnicode=true&characterEncoding=UTF-8

第1次……test springmvc …..

可以看到得到了 ￥{users}的值，也不报错了，问题解决了。为什么会发生这样的原因现在还没有清楚，还需要查资料，真的是学习永无止境呀！ 学习吧，少年，努力！