无法创建请求的服务[org.hibernate.engine.jdbc.env.spi.jdbcenvironment]

我是冬眠的新手。我目前正在使用Spring Boot框架并尝试通过Hibernate创建数据库表。

我以前知道同样的问题，但我似乎无法弄清楚如何根据我的环境解决错误。

hibernate.cfg.xml

<hibernate-configuration>
<session-factory>
    <!-- Database connection settings -->
    <property name="connection.driver_class">org.mm.mysql.Driver</property>
    <property name="connection.url">jdbc:mysql://localhost:3306</property>
    <property name="connection_userid">user</property>
    <property name="connection_pwd">pass</property>
    <!-- JDBC connection pool (use the built-in) -->
    <property name="connection_pool_size">true</property>
    <!-- SQL dialect -->
    <property name="dialect">org.hibernate.MySQLDialect</property>
    <!-- Disable the second-level cache -->
    <property name="cache.provider_class">org.hibernate.NoCacheProvider</property>
    <!-- Echo all executed SQL to stdout -->
    <property name="show_sql">1</property>
    <!-- Drop and re-create the database schema on startup -->
    <property name="hbmdl.auto">update</property>
    <!-- Names the annotated entity class -->
    <mapping class="com.test.springboot.model.AdultParticipant" />
</session-factory>

主类

     public static void main(String[] args) throws Exception {
    SpringApplication.run(WebApplication.class, args);
    Configuration cfg = new Configuration();
    cfg.configure("hibernate.cfg.xml");
    SessionFactory factory = cfg.buildSessionFactory();
    Session session = factory.openSession();
    Transaction t = session.beginTransaction();
    AdultParticipant ap = new AdultParticipant();
    ap.setFirstName("User"); 
    ap.setLastName("UserLastName");
    session.persist(ap);
    t.commit();
    session.close();
    System.out.println("successfully saved");

pojo class

@Entity
@Table(name = "adultparticipant")
public class AdultParticipant {
@GeneratedValue
@Id
@Column (name = "id")
private int id;
@Column (name = "firstName")
private String firstName;
@Column (name = "lastName")
private String lastName;

public int getId() {
    return id;
}
public void setId(int id) {
    this.id = id;
}

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;
  }
}

daoimpl类

  public class AdultParticipantDAOImpl implements AdultParticipantDAO{
private SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory) {
    this.sessionFactory = sessionFactory;
}
@Override
public void save(AdultParticipant ap) {
    Session session = this.sessionFactory.openSession();
    Transaction tx = session.beginTransaction();
    session.persist(ap);
    tx.commit();
    session.close();
}
@SuppressWarnings("unchecked")
@Override
public List<AdultParticipant> list() {
    Session session = this.sessionFactory.openSession();
    List<AdultParticipant> adultParticipants = session.createQuery("from AdultParticipant").list();
    session.close();
    return adultParticipants;
 }
}

dao class

public interface AdultParticipantDAO {
public void save(AdultParticipant p);
public List<AdultParticipant> list();
}

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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>hello-springboot</artifactId>
<name>hello-springboot</name>
<description>hello-springboot</description>
<packaging>war</packaging>
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.3.5.RELEASE</version>
</parent>
<properties>
    <java.version>1.8</java.version>
</properties>
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-tomcat</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.40</version>
    </dependency>
</dependencies>
<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

控制台中的错误

2017-03-13 11:48:40.512  WARN 9532 --- [           main] org.hibernate.orm.connections.pooling    : HHH10001002: Using H
ibernate built-in connection pool (not for production use!)
Exception in thread "main" org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate
.engine.jdbc.env.spi.JdbcEnvironment]
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:271)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:233)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:210)
    at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:51)

将mysql驱动程序升级到mysql-connector-java-8.0.17和

那些使用的人大于MySQL 5.5 版本

更改其驱动程序属性

来自 com.mysql.jdbc.Driver com.mysql.cj.jdbc.Driver

因为：

加载类com.mysql.jdbc.driver。这是弃用的。新的驱动程序类是com.mysql.cj.jdbc.driver。驱动程序自动通过SPI注册和驾驶员类的手动加载是通常不需要。Info -HHH000401：使用驱动程序 [com.mysql.jdbc.driver]在url ....

in hibernate.properties

hibernate.connection.driver_class = com.mysql.cj.jdbc.Driver

或如果您正在使用 hibernate.cfg.xml UPDATE

<property name="connection.driver_class">com.mysql.cj.jdbc.Driver</property>

connection.driver_class属性必须与 mysql-connector jar兼容。

mysql-connector＆lt;5.5.xx使用com.mysql.jdbc.Driver

mysql-connector> 5.5.xx使用com.mysql.cj.jdbc.Driver

 <property name="connection.url">jdbc:mysql://localhost:3306/test?serverTimezone=UTC</property>

您需要设置serverTimezone。

使用hsqldialect而不是mysqldialect

spring.jpa.database-platform=org.hibernate.dialect.HSQLDialect
spring.jpa.hibernate.ddl-auto=none
spring.jpa.show-sql=true

spring.datasource.url=jdbc:mysql://localhost:3306/xyz?serverTimezone=CST6CDT
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driverClassName=com.mysql.cj.jdbc.Driver

您需要在依赖项中添加 mysql jdbc jar。

将您的驱动程序类名称定为com.mysql.jdbc.Driver。

修复您的用户名和密码属性

"connection.username" for database user
"connection.password" for database user password

创建MySQL数据库。看到这个。
对于SSL警告，请修改您的Connection.url以包括使用SSL false。例如，jdbc:mysql://localhost:3306/<enter-your-database>?autoReconnect=true&useSSL=false
将您的MySQL方言修改为org.hibernate.dialect.MySQLDialect
使用<property name="hbmdl.auto">create-drop</property>代替<property name="hbmdl.auto">update</property>，但是在生产中使用此选项。您应该自己创建模式，而不是通过Hibernate进行。

我在演示环境中将战争文件部署到tomcat时也遇到了同样的问题。我的应用程序没有入门，因为在我的/tomcat/webapp/root文件夹中，我在那里找到了战争文件myapp.war。即在我的根文件夹中，它具有Web-Inf，Meta-Inf和MyApp.war，这引起了启动问题。我删除了战争文件并起作用。

我也有同样的问题：我犯的错误是在属性之间定义了双线。因此，您必须非常小心以使主要连接属性正确。

其次，请确保指定的方言对于所使用的DB版本是正确的。要查看各种方言，您需要转到Hibernate-core-5.3.1.final.jar文件，然后从那里查找org.hibernate.dialect。列出了可用的各种方言。

<hibernate-configuration>
    <session-factory>
        <!-- Database connection settings -->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <!-- property name="connection.driver_class">com.mysql.jdbc.Driver</property  com.mysql.cj.jdbc.Driver -->
        <property name="connection.url">jdbc:mysql://localhost:3306/test</property>
        <property name="connection.username">root</property>
        <property name="connection.password">mypassword</property>
        <!-- JDBC connection pool (use the built-in) -->
        <property name="connection.pool_size">1</property>
        <!-- SQL dialect -->
        <!--<property name="dialect">org.hibernate.dialect.MySQLDialect</property>-->
        <property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>
        <!-- Disable the second-level cache -->
        <property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>
        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property> 
        <property name="format_sql">true</property>
        <property name="current_session_context_class">thread</property>
        <!-- Drop and re-create the database schema on startup -->
        <property name="hbm2ddl.auto">update</property>  
        <!-- Names the annotated entity class -->
        <mapping class="org.test.connection.UserDetails" />
    </session-factory>
</hibernate-configuration>

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