使用简单的Spring Boot App出现错误“ APPLICATION FAILED START”

Question

我按照本教程使用Spring Boot构建REST服务。 一切都可以正常编译，但是启动后出现此错误。

***************************
APPLICATION FAILED TO START
***************************

Description:

Field repo in com.pearlbit.ContactRestController required a bean of type 'com.pearlbit.Contact$ContactRepository' that could not be found.


Action:

Consider defining a bean of type 'com.pearlbit.Contact$ContactRepository' in your configuration.

知道有什么问题吗？

更新：

这是我的“联系”类代码。

package com.pearlbit;
import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;
import org.springframework.data.mongodb.repository.MongoRepository;
import org.springframework.data.repository.query.Param;
import org.springframework.stereotype.Repository;

import java.util.List;

@Document
public class Contact {


    public interface ContactRepository extends MongoRepository<Contact, String> {
        List<Contact> findByLastName(String lastName);
    }


    @Id
    private String id;
    private String firstName;
    private String lastName;
    private String address;
    private String phoneNumber;
    private String email;
    private String twitterHandle;
    private String facebookProfile;
    private String linkedInProfile;
    private String googlePlusProfile;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getPhoneNumber() {
        return phoneNumber;
    }

    public void setPhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }

    public String getEmail() {
        return email;
    }

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

    public String getTwitterHandle() {
        return twitterHandle;
    }

    public void setTwitterHandle(String twitterHandle) {
        this.twitterHandle = twitterHandle;
    }

    public String getFacebookProfile() {
        return facebookProfile;
    }

    public void setFacebookProfile(String facebookProfile) {
        this.facebookProfile = facebookProfile;
    }

    public String getLinkedInProfile() {
        return linkedInProfile;
    }

    public void setLinkedInProfile(String linkedInProfile) {
        this.linkedInProfile = linkedInProfile;
    }

    public String getGooglePlusProfile() {
        return googlePlusProfile;
    }

    public void setGooglePlusProfile(String googlePlusProfile) {
        this.googlePlusProfile = googlePlusProfile;
    }

}

我已经包含了MongoRepository的界面，但是它仍然给我同样的问题。 是否需要在其他地方添加？

Answer 1

可能您正在使用的bean类型是Contact $ ContactRepository，但尚未创建它，则应首先注册该类型的bean。如果您使用的是spring boot，则可以通过添加JPA启动器来扩展JPA Repository来完成接口

Answer 2

package hello;

import java.util.List;

import org.springframework.data.repository.CrudRepository;

public interface ContactRepositoryextends ContactRepository<Contact, Long> {
    List<Customer> findByLastName(String lastName);
}

尝试这个。 您的存储库将由spring自动实现。