java - 获取: Unsatisfied dependency expressed through field 'userRepository'

Question

Unsatisfied dependency expressed through field 'userRepository'

谁能告诉我缺少什么或需要添加什么？预先非常感谢!

这是我的项目结构的图片。

User.java

package org.codigo.entites;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
public class User {

@Id
@GeneratedValue
private Long id;
private String fname;
private String lname;
public Long getId() {
    return id;
}
public void setId(Long id) {
    this.id = id;
}
public String getFname() {
    return fname;
}
public void setFname(String fname) {
    this.fname = fname;
}
public String getLname() {
    return lname;
}
public void setLname(String lname) {
    this.lname = lname;
}
public User(String fname, String lname) {
    this.fname = fname;
    this.lname = lname;
}
public User() {
}
@Override
public String toString() {
    return "User [id=" + id + ", fname=" + fname + ", lname=" + lname + "]";
}
}

UserRepository.java

package org.codigo.repositories;

import org.codigo.entites.User;
import org.springframework.data.jpa.repository.JpaRepository;

public interface UserRepository extends JpaRepository<User, Long> {

}

Answer 1

您的UserRepository是接口(interface)，您无法为接口(interface)创建bean

public interface UserRepository extends JpaRepository<User, Long>

将UserRepository声明为具有方法实现的类，并使用@Repository注释进行注释，如果JpaRepository是接口(interface)，那么您应该使用implements 关键字

@Repository
public class UserRepository extends JpaRepository<User, Long>