SpringData存储库错误

Question

我对SpringData和JPA有问题。当我向HomeRepository接口添加方法时，我得到一个错误。我使用的是JPararePository接口，在pom.xml文件中有一个MySQL数据库集。这些只是我对spring的开始，所以我需要一些了解spring的人的帮助。下面是我的代码和日志：

package com.kampusbaza.kampusbaza.model;

import javax.persistence.*;
import java.io.Serializable;

@Entity
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
@Table(name= "User")
public class User implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue
    @Column
    private Long iduser;
    @Column(columnDefinition = "VARCHAR(30) NOT NULL")
    private String name;
    @Column(columnDefinition = "VARCHAR(30) NOT NULL")
    private String surname;
    @Column(columnDefinition = "VARCHAR(45) NOT NULL")
    private String email;
    @Column(columnDefinition = "VARCHAR(20) NOT NULL")
    private String password;

    public User() {
    }

    public User(String name, String surname, String email, String password) {
        this.name = name;
        this.surname = surname;
        this.email = email;
        this.password = password;
    }

    public Long getIduser() {
        return iduser;
    }

    public void setIduser(Long iduser) {
        this.iduser = iduser;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getSurname() {
        return surname;
    }

    public void setSurname(String surname) {
        this.surname = surname;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "User[" +
                "id=" + iduser +
                ", name='" + name + '\'' +
                ", surname='" + surname + '\'' +
                ", email=" + email +
                ", password=" + password +
                ']';
    }
}

主页库：

package com.kampusbaza.kampusbaza.repository;

import org.springframework.data.jpa.repository.JpaRepository;

import java.io.Serializable;
import java.util.List;

@NoRepositoryBean
public interface HomeRepository<T, ID extends Serializable> extends 
JpaRepository<T, ID> {
void delete(T deleted);
<S extends T> S save(S entity);
List<T> findAll();
}

用户存储库：

 package com.kampusbaza.kampusbaza.repository;


import com.kampusbaza.kampusbaza.model.User;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import java.io.Serializable;
public interface UserRepository extends HomeRepository<User, Long>  {
}

日志：

Answer 1

您的homeRepository没有任何用处。您正在定义的方法已经存在于接口jparepository中，因此只需使userrepository扩展该接口即可：

public interface UserRepository extends JpaRepository<User, Long>  {
}

这应该可以解决你的问题。