堆栈内存溢出
  繁体   English   中英

连接 Hibernate 到 MySQL 数据库的问题

[英]Problems with connection Hibernate to MySQL database

 原文  2020-10-27 13:20:44  9   2    java/ mysql/ hibernate/ maven

问题描述

首先，这是我在这里的第一篇文章，很抱歉。

我正在做 Udemy 课程 Hibernate 和 JPA，但我在这里遇到了问题。

我的意思是我所做的一切都像一个正在学习但在运行程序时遇到问题的人。

我不知道该怎么处理。 我正在使用 Eclipse，而 MySql 是 MySQL Workbench。

有一个我的项目 -> 点击

和一个来自 Udemy 的人的项目 -> 点击

当我想运行程序ai时有这个问题

    WARN - HHH000402: Using Hibernate built-in connection pool (not for production use!)
Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.
INFO - HHH000401: using driver [com.mysql.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/ifinances]
INFO - HHH000046: Connection properties: {password=skills, user=infinite}
INFO - HHH000006: Autocommit mode: false
INFO - HHH000115: Hibernate connection pool size: 20 (min=1)
DEBUG - Initializing Connection pool with 1 Connections
org.hibernate.exception.JDBCConnectionException: Error calling Driver#connect
    at org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator$1$1.convert(BasicConnectionCreator.java:122)
    at org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator.convertSqlException(BasicConnectionCreator.java:140)
    at org.hibernate.engine.jdbc.connections.internal.DriverConnectionCreator.makeConnection(DriverConnectionCreator.java:58)
    at org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator.createConnection(BasicConnectionCreator.java:75)
    at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure(DriverManagerConnectionProviderImpl.java:106)
    at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206)
    at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.buildJdbcConnectionAccess(JdbcServicesImpl.java:260)
    at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:94)
    at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206)
    at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1885)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1843)
    at com.infiniteskills.data.HibernateUtil.buildSessionFactory(HibernateUtil.java:17)
    at com.infiniteskills.data.HibernateUtil.<clinit>(HibernateUtil.java:11)
    at com.infiniteskills.data.Application.main(Application.java:12)
Caused by: java.sql.SQLException: The server time zone value '?rodkowoeuropejski czas letni' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the 'serverTimezone' configuration property) to use a more specific time zone value if you want to utilize time zone support.
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:129)
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89)
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63)
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73)
    at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:76)
    at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836)
    at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456)
    at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246)
    at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:198)
    at org.hibernate.engine.jdbc.connections.internal.DriverConnectionCreator.makeConnection(DriverConnectionCreator.java:55)
    ... 15 more
Caused by: com.mysql.cj.exceptions.InvalidConnectionAttributeException: The server time zone value '?rodkowoeuropejski czas letni' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the 'serverTimezone' configuration property) to use a more specific time zone value if you want to utilize time zone support.
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
    at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
    at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:85)
    at com.mysql.cj.util.TimeUtil.getCanonicalTimezone(TimeUtil.java:134)
    at com.mysql.cj.protocol.a.NativeProtocol.configureTimezone(NativeProtocol.java:2186)
    at com.mysql.cj.protocol.a.NativeProtocol.initServerSession(NativeProtocol.java:2209)
    at com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:1318)
    at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:967)
    at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:826)
    ... 19 more
Exception in thread "main" java.lang.ExceptionInInitializerError
    at com.infiniteskills.data.Application.main(Application.java:12)
Caused by: java.lang.RuntimeException: There was an error building the factory
    at com.infiniteskills.data.HibernateUtil.buildSessionFactory(HibernateUtil.java:22)
    at com.infiniteskills.data.HibernateUtil.<clinit>(HibernateUtil.java:11)
    ... 1 more



Its my hibernate.cfg.xml file :

package com.infiniteskills.data;

import java.util.Date;

import org.hibernate.Session;
import com.infiniteskills.data.entities.User;

public class Application {

    public static void main(String[] args) {
        
        Session session = HibernateUtil.getSessionFactory().openSession();
        session.getTransaction().begin();
        
        User user = new User();
        user.setBirthDate(new Date());
        user.setCreatedDate(new Date());
        user.setCreatedBy("kevin");
        user.setEmailAddress("kmb@yahoo.com");
        user.setFirstName("Kevin");
        user.setLastName("Bowersox");
        user.setLastUpdatedBy("kevin");
        user.setLastUpdatedDate(new Date());
        
        
        session.save(user);
        session.getTransaction().commit();
        session.close();
    }
}

hibernate.properties 文件：

hibernate.connection.username= infinite
hibernate.connection.password= skills
hibernate.connection.url=jdbc:mysql://localhost:3306/ifinances
hibernate.connection.driver_class=com.mysql.jdbc.Driver
hibernate.dialect=org.hibernate.dialect.MySQL5Dialect

log4j.properties 文件：

    log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.SimpleLayout
log4j.rootLogger=debug, stdout

Application.java 文件：

package com.infiniteskills.data;

import java.util.Date;

import org.hibernate.Session;
import com.infiniteskills.data.entities.User;

public class Application {

    public static void main(String[] args) {
        
        Session session = HibernateUtil.getSessionFactory().openSession();
        session.getTransaction().begin();
        
        User user = new User();
        user.setBirthDate(new Date());
        user.setCreatedDate(new Date());
        user.setCreatedBy("kevin");
        user.setEmailAddress("kmb@yahoo.com");
        user.setFirstName("Kevin");
        user.setLastName("Bowersox");
        user.setLastUpdatedBy("kevin");
        user.setLastUpdatedDate(new Date());
        
        
        session.save(user);
        session.getTransaction().commit();
        session.close();
    }
}

HibernateUtil.java 文件：

   package com.infiniteskills.data;

import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;

import com.infiniteskills.data.entities.User;

public class HibernateUtil {

    private static final SessionFactory sessionFactory = buildSessionFactory();

    private static SessionFactory buildSessionFactory() {
        try {
            Configuration configuration = new Configuration();
            return configuration
                    .buildSessionFactory(new StandardServiceRegistryBuilder()
                            .applySettings(configuration.getProperties())
                            .build());
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException(
                    "There was an error building the factory");
        }
    }

    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }
}

和我的 pom.xml 文件

<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.infiniteskills</groupId>
  <artifactId>hibernate-course</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>hibernate-course</name>
  <dependencies>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>4.3.6.Final</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-annotations</artifactId>
        <version>3.5.6-Final</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.7.7</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.7.7</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.22</version>
    </dependency>
  </dependencies>
</project>

编辑1：还有另一个问题->

线程“main”org.hibernate.MappingException 中的异常：未知实体：com.infiniteskills.data.entities.User

User.java 文件：

package com.infiniteskills.data.entities;

import java.util.Date;

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

@Entity

@Table(name="FINANCES_USER")
public class User {

    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    @Column(name="USER_ID")
    private Long userId;

    @Column(name="FIRST_NAME")
    private String firstName;

    @Column(name="LAST_NAME")
    private String lastName;

    @Column(name="BIRTH_DATE")
    private Date birthDate;

    @Column(name="EMAIL_ADDRESS")
    private String emailAddress;

    @Column(name="LAST_UPDATED_DATE")
    private Date lastUpdatedDate;

    @Column(name="LAST_UPDATED_BY")
    private String lastUpdatedBy;

    @Column(name="CREATED_DATE")
    private Date createdDate;

    @Column(name="CREATED_BY")
    private String createdBy;

    public Long getUserId() {
        return userId;
    }

    public void setUserId(Long userId) {
        this.userId = userId;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public Date getBirthDate() {
        return birthDate;
    }

    public void setBirthDate(Date birthDate) {
        this.birthDate = birthDate;
    }

    public String getEmailAddress() {
        return emailAddress;
    }

    public void setEmailAddress(String emailAddress) {
        this.emailAddress = emailAddress;
    }

    public Date getLastUpdatedDate() {
        return lastUpdatedDate;
    }

    public void setLastUpdatedDate(Date lastUpdatedDate) {
        this.lastUpdatedDate = lastUpdatedDate;
    }

    public String getLastUpdatedBy() {
        return lastUpdatedBy;
    }

    public void setLastUpdatedBy(String lastUpdatedBy) {
        this.lastUpdatedBy = lastUpdatedBy;
    }

    public Date getCreatedDate() {
        return createdDate;
    }

    public void setCreatedDate(Date createdDate) {
        this.createdDate = createdDate;
    }

    public String getCreatedBy() {
        return createdBy;
    }

    public void setCreatedBy(String createdBy) {
        this.createdBy = createdBy;
    }

}

2 个解决方案

解决方案1
 1  2020-10-27 13:37:56

更新 hibernate.properties 并直接在 JDBC 连接字符串中添加 serverTimeZone 属性..

hibernate.connection.url=jdbc:mysql://localhost:3306/ifinances?serverTimezone=UTC

解决方案2
 0  2020-10-27 23:15:21

我对这个项目还有另一个问题。

线程“main”org.hibernate.MappingException 中的异常：未知实体：com.infiniteskills.data.entities.User

我在 User.java 上面添加了一个代码

暂无
暂无

声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.

相关问题 连接MySQL和休眠问题 MySQL Server终止并且休眠数据库连接未关闭 休眠连接问题 休眠MySQL连接无法正常工作 Hibernate / MySQL连接超时 Hibernate / mysql连接问题 Spring Hibernate MySQL-没有连接？ 休眠 - MySQL - 连接到数据库 Hibernate关闭MySQL连接 Hibernate-MySQL连接
相关标签
 
粤ICP备18138465号  © 2020-2024 STACKOOM.COM