One article with mybatis. java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)

Abstract: This article is applicable to the configuration of the dark horse Javaweb project, using mybatis to configure the database connection, using the mapper interface and its xml file to connect to the database

Problem Description

Database connection problem, display password error, unable to connect to the database

Caused by: org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)
### The error may exist in com/itheima/mapper/BrandMapper.xml
### The error may involve com.itheima.mapper.BrandMapper.selectByPageAndCondition
### The error occurred while executing a query
### Cause: java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)  

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Cause Analysis:

The password to connect to the database is wrong

### Cause: java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)

mybatis-config.xml的配置错误，1处值与你自己的配置不一样

 

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solution:

Enter to mybatis-config.xmlview the code

It can be solved by changing the value of username and password to the value you set yourself

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <typeAliases>
        <package name="com.itheima.pojo"/>
    </typeAliases>

    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql:///db1?useSSL=false"/>
                <property name="username" value="root"/>
                <property name="password" value="root"/>
            </dataSource>
        </environment>
    </environments>
    <mappers>
       <!--扫描mapper-->
        <package name="com.itheima.mapper"/>
    </mappers>
</configuration>

Note:

1. There may be a problem in the driver attribute (the impact is not significant, but it is recommended to modify)

com.mysql.jdbc.Driver It is version below mysql-connector-java 5 and
com.mysql.cj.jdbc.Driver version above mysql-connector-java 6.

2. The value of url is  :             jdbc:mysql:/// database schema name ?useSSL=false

My database looks like this: to use the table url configuration under db1 is jdbc:mysql:///db1?useSSL=false