java - 考虑在配置 SpringBoot 中定义一个名为“entityManagerFactory”的 bean
问题描述
package com.loginregister.loginregister.entities;
import java.util.List;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.ManyToMany;
@Entity
public class Role {
@Id
private String name;
@ManyToMany(mappedBy = "roles")
private List<User> users;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public List<User> getUsers() {
return users;
}
public void setUsers(List<User> users) {
this.users = users;
}
public Role(String name, List<User> users) {
this.name = name;
this.users = users;
}
public Role() {
}
public Role(String name) {
this.name = name;
}
}
角色.java
package com.loginregister.loginregister.entities;
import javax.persistence.*;
import javax.validation.constraints.NotEmpty;
import javax.persistence.GeneratedValue;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
@Entity
public class Task {
@Id
@GeneratedValue
private Long id;
@NotEmpty
private String date;
@NotEmpty
private String startTime;
@NotEmpty
private String stopTime;
@NotEmpty
private String Description;
@ManyToOne
@JoinColumn(name = "USER_EMAIL")
private User user;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
public String getStartTime() {
return startTime;
}
public void setStartTime(String startTime) {
this.startTime = startTime;
}
public String getStopTime() {
return stopTime;
}
public void setStopTime(String stopTime) {
this.stopTime = stopTime;
}
public String getDescription() {
return Description;
}
public void setDescription(String description) {
Description = description;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public Task(String date, String startTime, String stopTime, String description, User user) {
this.date = date;
this.startTime = startTime;
this.stopTime = stopTime;
Description = description;
this.user = user;
}
public Task(String date, String startTime, String stopTime, String description) {
this.date = date;
this.startTime = startTime;
this.stopTime = stopTime;
Description = description;
}
public Task() {
}
}
任务.java
package com.loginregister.loginregister.entities;
import org.springframework.scheduling.config.Task;
import javax.persistence.*;
import javax.validation.constraints.Email;
import javax.validation.constraints.NotEmpty;
import javax.validation.constraints.Size;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import java.util.List;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.OneToMany;
@Entity
public class User {
@Id
@Email
@NotEmpty
@Column(unique = true)
private String email;
@NotEmpty
private String name;
@Size(min = 4)
private String password;
@OneToMany(mappedBy = "user", cascade = CascadeType.ALL)
private List<Task> tasks;
@ManyToMany(cascade = CascadeType.ALL)
@JoinTable(name = "USER_ROLES",joinColumns = {
@JoinColumn(name = "USER_EMAIL", referencedColumnName = "email")
},inverseJoinColumns = {@JoinColumn(name = "ROLE_NAME", referencedColumnName = "name")})
private List<Role> roles;
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public List<Task> getTasks() {
return tasks;
}
public void setTasks(List<Task> tasks) {
this.tasks = tasks;
}
public List<Role> getRoles() {
return roles;
}
public void setRoles(List<Role> roles) {
this.roles = roles;
}
public User(String email, String name, String password) {
this.email = email;
this.name = name;
this.password = password;
}
public User() {
}
}
用户.java
package com.loginregister.loginregister.repositories;
import com.loginregister.loginregister.entities.Role;
import org.springframework.data.jpa.repository.JpaRepository;
public interface RoleRepository extends JpaRepository<Role, String>{
}
RoleRepository.java
package com.loginregister.loginregister.repositories;
import com.loginregister.loginregister.entities.Task;
import org.springframework.data.jpa.repository.JpaRepository;
public interface TaskRepository extends JpaRepository<Task, Long> {
}
任务存储库.java
package com.loginregister.loginregister.repositories;
import com.loginregister.loginregister.entities.User;
import org.springframework.data.jpa.repository.JpaRepository;
public interface UserRepository extends JpaRepository<User, String> {
}
用户存储库
package com.loginregister.loginregister;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class LoginRegisterApplication {
public static void main(String[] args) {
SpringApplication.run(LoginRegisterApplication.class, args);
}
}
登录注册应用程序.java
spring.datasource.url=jdbc:mysql://localhost:3306/SpringAuth?useSSL=false
spring.datasource.username=root
spring.datasource.password=****
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=create-drop
应用程序属性
http://maven.apache.org/xsd/maven-4.0.0.xsd">4.0.0
<groupId>com.LoginRegister</groupId>
<artifactId>login-register</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>login-register</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<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-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.0.7.Final</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
pom.xml
[错误] 测试运行:1,失败:0,错误:1,跳过:0,经过的时间:2.941 s <<< FAILURE!- 在 com.loginregister.loginregister.LoginRegisterApplicationTests [ERROR] contextLoads(com.loginregister.loginregister.LoginRegisterApplicationTests) 已用时间:0.005 s <<< 错误!java.lang.IllegalStateException:无法加载 ApplicationContext 原因:org.springframework.beans.factory.BeanCreationException:创建类路径资源中定义的名称为“entityManagerFactory”的bean时出错[org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration .class]: init 方法调用失败;嵌套异常是 org.hibernate.AnnotationException: @OneToOne 或 @ManyToOne on com.loginregister.loginregister.entities.Task.user 引用未知实体:com.loginregister.loginregister.entities.User 原因:
解决方案
这可以通过以下方式解决:
Hibernate jpa 2.1 jar,它是 spring-boot-started-data-jpa 的一部分。删除 .m2 文件夹中的依赖项并再次报告 pom.xml
或<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
添加存储库注释
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