Question

我正在尝试在Maven Proyect中使用intellij配置JPA，但是当我测试连接时，连接失败：C

我尝试将localhost更改为127.0.0.0、127.0.0.1和0.0.0.0 我也有mysql依赖项

<dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>5.4.2.Final</version>
      </dependency>
      <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
      <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.16</version>
    </dependency>

persistence.xml

<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="2.0">
    <persistence-unit name="PruebaPU" transaction-type="RESOURCE_LOCAL">
        <properties>
            <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/Prueba"/>
            <property name="javax.persistence.jdbc.user" value="root"/>
            <property name="javax.persistence.jdbc.password" value="root"/>
            <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
        </properties>
    </persistence-unit>
</persistence>

测试显示：

Connection to Prueba@localhost failed.
[08S01] Communications link failure.
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

Answer 1

您的mysql服务是否正在运行，您可以在控制面板中进行检查。也是telnet localhost3306。也许您可以尝试将绑定地址条目输入到my.cnf

使用Intellij配置JPA

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