您好,我在启用从 java 模型 @Entity 类自动生成数据库表时遇到问题。我几乎尝试了一切。
我首先在 Intellij Idea 中创建了 maven 项目,我已经下载了我正在使用的 JavaEE 8 api 实现。
我使用 Glassfish 5.0 服务器作为 java ee 8 实现提供程序和 MySQL 数据库。
我的项目结构:
我的 pom.xml 看起来像:
<?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>
<groupId>com.zerg.web</groupId>
<artifactId>PlanYourTime</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<!-- https://mvnrepository.com/artifact/javax/javaee-api -->
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>8.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
我的模型@Entity 类 wchich 我想在我的 MySQL 数据库中生成表。
package model;
import javax.persistence.*;
@Entity
@TableGenerator(name = "USER")
public class User {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "USERID")
private int userId;
@Column(name = "USERNAME")
private String username;
@Column(name = "PASSWORD")
private String password;
@Column(name = "EMAIL")
private String email;
public User(String username, String password, String email) {
this.username = username;
this.password = password;
this.email = email;
}
public User() {
}
public int getUserId() {
return userId;
}
public void setUserId(int userId) {
this.userId = userId;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}
我的 persistence.xml 文件 src/main/java/META-INF/ 看起来像:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_2.xsd"
version="2.2">
<persistence-unit name="myPu" transaction-type="JTA">
<jta-data-source>jdbc/PlanYourTime</jta-data-source>
<properties>
<property name="javax.persistence.schema-generation.database.action" value="create"/>
<property name="javax.persistence.schema-generation.create-source" value="metadata"/>
<property name="javax.persistence.schema-generation.drop-source" value="metadata"/>
<property name="javax.persistence.sql-load-script-source" value="META-INF/load-script.sql"/>
<property name="eclipselink.logging.level" value="FINE"/>
<property name="eclipselink.ddl-generation" value="create-or-extend-tables"/>
</properties>
</persistence-unit>
在我的 glassfish 服务器管理页面中,我还添加了 Jdbc 资源和 jdbc 连接池,如下所示:
我的战争工件结构看起来像我部署到 glassfish 5.0 服务器的 IntellijIdea:
当我检查 server.log 中的 glassfish 时,我没有收到任何错误。
我将非常感谢您的每一次帮助。