异常
ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘userController’: Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘userServiceImpl’: Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘userDao’ defined in com.william.dao.UserDao defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Cannot resolve reference to bean ‘jpaMappingContext’ while setting bean property ‘mappingContext’; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘jpaMappingContext’: Invocation of init method failed; nested exception is org.hibernate.AnnotationException: No identifier specified for entity: com.william.domain.User
org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘userController’: Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘userServiceImpl’: Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘userDao’ defined in com.william.dao.UserDao defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Cannot resolve reference to bean ‘jpaMappingContext’ while setting bean property ‘mappingContext’; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘jpaMappingContext’: Invocation of init method failed; nested exception is org.hibernate.AnnotationException: No identifier specified for entity: com.william.domain.User
异常原因翻译：
ConfigServletWebServerApplicationContext:在上下文初始化期间遇到的异常——取消刷新尝试:org.springframework.bean .factory。BeanCreationException:创建名为“userController”的bean时出错:注入资源依赖失败;嵌套异常是org.springframe .bean .factory。BeanCreationException:创建名为“userServiceImpl”的bean时出错:注入资源依赖失败;嵌套异常是org.springframe .bean .factory。BeanCreationException:创建名为“userDao”的bean时出错，该bean在com. williams .dao中定义。UserDao定义在jpareposoriesregistrar上声明的@ enablejparepospos存中。EnableJpaRepositoriesConfiguration:在设置bean属性“mappingContext”时无法解析对bean“jpaMappingContext”的引用;嵌套异常是org.springframe .bean .factory。创建名为“jpaMappingContext”的bean时出错:init方法调用失败;嵌套异常是org.hibernate。注释异常:没有为实体指定标识符:com. williams .domain. user
问题根本原因：
注释异常:没有为实体指定标识符:com. williams .domain. user
实体类加入@Id
package com.william.domain;import javax.persistence.*;/*** @author ：lijunxuan* @date ：Created in 2020/5/30 12:29* @description ：* @version: 1.0*/
@Table(name = "user")
@Entity
public class User {@Id@GeneratedValue(strategy = GenerationType.IDENTITY)private Integer id;private String username;private String password;private String name;@Overridepublic String toString() {return "User{" +"id=" + id +", username='" + username + '\'' +", password='" + password + '\'' +", name='" + name + '\'' +'}';}public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}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 getName() {return name;}public void setName(String name) {this.name = name;}
}
