spring-data-jpa Error creating bean with name 'entityManagerFactory' defined in class path resource

项目地址:https://github.com/heng1234/springdata-jpa

问题描述：

 

刚开始实体类代码是这样写的

package com.hvly.springjp_1.com.hlvy.entity;

import lombok.Data;

import javax.persistence.*;


/**
 * Customer
 *
 * @author heng
 **/

/**
 * 1、在@Entity下增加@NamedQuery定义 需要注意 query里面的值也是JPQL 查询参数也要和实体类对应起来
 * 因为实际场景中这种破坏ENtity的侵入式很不美 也不方便 所以这种方式容易一万 工作中也很少推荐
 * 2、与之相对应的还有@NamedNativeQuery 用法一样 唯一不同的是 query里面放置的是原生SQL语句 而非实体类的字段名字
 * name query的名称 规则：实体类.方法名`
 */

@NamedQuery(name = "Customer.findByFirstName",
        query = "select c from Customer c where c.firstaname = ?1")
//@Data
@Entity
public class Customer {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)//自动增递
    private Long id;

    private String firstname;

    private String lastname;

    public Long getId() {
        return id;
    }

    public void setId(Long 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;
    }
}

CustomerJpaRepository

package com.hvly.springjp_1.com.hlvy.repository;

import com.hvly.springjp_1.com.hlvy.entity.Customer;
import org.springframework.data.jpa.repository.JpaRepository;

/**
 * Customer
 *
 * @author heng
 **/
public interface CustomerJpaRepository extends JpaRepository{

    /**
     * @NamedQuery查询
     * @param firstName
     * @return
     */
    Customer findByFirstName(String firstName);
}

Controller

package com.hvly.springjp_1.com.hlvy.controller;

import com.hvly.springjp_1.com.hlvy.entity.Customer;
import com.hvly.springjp_1.com.hlvy.repository.CustomerJpaRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * CustomerController
 *
 * @author heng
 **/
@RestController
@RequestMapping("customer")
public class CustomerController {

    @Autowired
    private CustomerJpaRepository customerJpaRepository;

    /**
     * @NamedQuery查询
     * @param firstName
     * @return
     */
    @RequestMapping("findByFirstName")
    Customer findByFirstName(String firstName){
        return customerJpaRepository.findByFirstName(firstName);
    }
}

结果启动报错： sql打印出来  from后面跟的是实体类路径

接着我去网上看到这个https://blog.csdn.net/uhb6577/article/details/78998883

发现我已经加了@Entity注解

最后发现@NamedQuery(name = "Customer.findByFirstName",
        query = "select c from Customer c where c.firstaname = ?1")

多写了个字母a 应该是  where c.firstname = ?1 而不是 where c.firstaname = ?1