mysql - java.sql.SQLException : Access denied for user '' @'localhost' (using password: YES)

Question

我正在尝试在 Spring Boot 中构建一个基本的 CRUD 应用程序。

创建了一个模型类如下:

员工.java

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity
public class Employee implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(nullable = false, updatable = false)
    private Long id;
    private String name;
    private String email;
    private String jobTitle;
    private String phone;
    private String imageUrl;
    @Column(nullable = false, updatable = false)
    private String employeeCode;

    public Employee() {
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getJobTitle() {
        return jobTitle;
    }

    public void setJobTitle(String jobTitle) {
        this.jobTitle = jobTitle;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public String getImageUrl() {
        return imageUrl;
    }

    public void setImageUrl(String imageUrl) {
        this.imageUrl = imageUrl;
    }

    public String getEmployeeCode() {
        return employeeCode;
    }

    public void setEmployeeCode(String employeeCode) {
        this.employeeCode = employeeCode;
    }

    public Employee(String name, String email, String jobTitle, String phone, String imageUrl, String employeeCode) {
        this.name = name;
        this.email = email;
        this.jobTitle = jobTitle;
        this.phone = phone;
        this.imageUrl = imageUrl;
        this.employeeCode = employeeCode;
    }

    @Override
    public String toString() {
        return "Employee [id=" + id + ", name=" + name + ", email=" + email + ", jobTitle=" + jobTitle + ", phone="
                + phone + ", imageUrl=" + imageUrl + ", employeeCode=" + employeeCode + "]";
    }

}

这是我的 application.properties 文件。

#MYSQL Configuration

spring.datasource.url=jdbc:mysql://localhost:3306/employeemanager
spring.datasource.data-username=myusername
spring.datasource.password=mypassword
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
debug= true

我的 Pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.4.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.sood1</groupId>
    <artifactId>EmployeeManager</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>EmployeeManager</name>
    <description>Employee Manager App</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

下面是错误的日志。

java.sql.SQLException: Access denied for user ''@'localhost' (using password: YES)
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:129) ~[mysql-connector-java-8.0.23.jar:8.0.23]
    at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122) ~[mysql-connector-java-8.0.23.jar:8.0.23]

我尝试使用相同的凭据在 sql 命令行界面中建立连接，并且工作正常。 谁能帮忙解释一下为什么会出现这个问题以及解决这个问题的方法是什么。

提前谢谢您

Answer 1

您的配置有错误 spring.datasource.data-username=myusername 将其更改为 spring.datasource.username=myusername