我简单地用尽了代码的错误。我用Google搜索并搜索了几个小时，没有任何建议/标记的解决方案适合我。我只是想不通为什么找不到这个entityManagerFactory类。
我使用MySQL作为后端数据库
项目的树结构：
├───.gradle
│ ├───4.3
│ │ ├───fileChanges
│ │ ├───fileContent
│ │ ├───fileHashes
│ │ └───taskHistory
│ └───buildOutputCleanup
├───.settings
├───bin
│ └───com
│ ├───controller
│ └───model
├───build
│ ├───classes
│ │ └───java
│ │ ├───main
│ │ │ └───com
│ │ │ ├───controller
│ │ │ └───model
│ │ └───test
│ ├───libs
│ ├───reports
│ │ └───tests
│ │ └───test
│ │ ├───classes
│ │ ├───css
│ │ ├───js
│ │ └───packages
│ ├───resources
│ │ └───main
│ ├───test-results
│ │ └───test
│ │ └───binary
│ └───tmp
│ ├───bootJar
│ ├───compileJava
│ ├───compileTestJava
│ └───jar
├───gradle
│ └───wrapper
└───src
├───main
│ ├───java
│ │ └───com
│ │ ├───controller
│ │ └───model
│ └───resources
└───test
└───java
Application.java位于：src / main / java / com /
控制器在/ src / main / java / com / controller /下
AccountRepository和Account位于/ src / main / java / com / model下
主要课程：
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
@SpringBootApplication
@EnableJpaAuditing
@EnableJpaRepositories
public class Application {
// Start application
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
AdminAccount类：
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.EntityListeners;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import org.springframework.data.jpa.domain.support.AuditingEntityListener;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
@Entity
@Table(name = "ccs_account_admin")
@EntityListeners(AuditingEntityListener.class)
@JsonIgnoreProperties(value = {"createdAt", "updatedAt"}, allowGetters = true)
public class AdminAccount implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private int id;
@Column(name = "account_id")
private int account_id;
@Column(name = "first_name")
private String first_name;
@Column(name = "last_name")
private String last_name;
@Column(name = "email")
private String email;
@Column(name = "password")
private String password;
public AdminAccount AdminAccount (String email, String password) {
return this;
}
@Override
public String toString() {
return "Account [id=" + id + ", account_id=" + account_id + ", first_name=" + first_name + ", last_name="
+ last_name + ", email=" + email + ", password=" + password + "]";
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public int getAccount_id() {
return account_id;
}
public void setAccount_id(int account_id) {
this.account_id = account_id;
}
public String getFirst_name() {
return first_name;
}
public void setFirst_name(String first_name) {
this.first_name = first_name;
}
public String getLast_name() {
return last_name;
}
public void setLast_name(String last_name) {
this.last_name = last_name;
}
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;
}
}
AdminAccountRepo：
@Repository
public interface AdminAccountRepository extends JpaRepository<AdminAccount, Integer> {
@Query("Select * from ccs_account_admin where email=:email and password=:password")
AdminAccount getAccount(@Param("email") String email, @Param("password") String password);
}
控制器：
@RestController
@RequestMapping("/login")
public class LoginController {
@Autowired
private AdminAccountRepository adminAccountRepository; <--The problem happens here
@GetMapping("/account")
public AdminAccount account(
@RequestParam(value="email", required = true) String email,
@RequestParam(value="password", required = true) String password)
{
System.out.println("email:" + email);
System.out.println("pass:" + password);
AdminAccount account = adminAccountRepository.getAccount(email, password);
System.out.println("account: " + account);;
return account;
}
}
摇篮
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:2.0.3.RELEASE")
}
}
// Apply the java-library plugin to add support for Java Library
apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'
sourceCompatibility = 1.8
targetCompatibility = 1.8
// In this section you declare where to find the dependencies of your project
repositories {
// Use jcenter for resolving your dependencies.
// You can declare any Maven/Ivy/file repository here.
jcenter()
mavenCentral()
}
dependencies {
// This dependency is exported to consumers, that is to say found on their compile classpath.
//api 'org.apache.commons:commons-math3:3.6.1'
// This dependency is used internally, and not exposed to consumers on their own compile classpath.
//implementation 'com.google.guava:guava:23.0'
// Use JUnit test framework
testImplementation 'junit:junit:4.12'
// https://mvnrepository.com/artifact/junit/junit
testCompile group: 'junit', name: 'junit', version: '4.12'
// https://mvnrepository.com/artifact/org.postgresql/postgresql
compile group: 'org.postgresql', name: 'postgresql', version: '9.4.1212'
// https://mvnrepository.com/artifact/mysql/mysql-connector-java
compile group: 'mysql', name: 'mysql-connector-java', version: '8.0.12'
// https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-jdbc
compile group: 'org.springframework.boot', name: 'spring-boot-starter-jdbc', version: '2.0.4.RELEASE'
// https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-jpa
compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-jpa', version: '2.0.4.RELEASE'
// https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web
compile group: 'org.springframework.boot', name: 'spring-boot-starter-web', version: '2.0.4.RELEASE'
}
我尝试过不同的Annotations，删除.m2目录，重建整个事物，不同的依赖关系和各种其他东西......无济于事
编辑：
application.properties:
#General
spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration
##PostgreSQL Configuration
#spring.jpa.hibernate.ddl-auto=none
#spring.datasource.url=jdbc:postgresql://185.83.216.7:5432/orderlyq
#spring.datasource.username=postgres
#spring.datasource.password=postgres
#
## Disable feature detection by this undocumented parameter. Check the org.hibernate.engine.jdbc.internal.JdbcServiceImpl.configure method for more details.
#spring.jpa.properties.hibernate.temp.use_jdbc_metadata_defaults = false
#
## Because detection is disabled you have to set correct dialect by hand.
#spring.jpa.database-platform=org.hibernate.dialect.PostgreSQL9Dialect
#MySQL Configuration
spring.jpa.hibernate.ddl-auto=none
spring.datasource.url=jdbc:myql://127.0.0.1:3306/cc_stats
spring.datasource.username=root
spring.datasource.password=password
错误信息：
Description:
Field adminAccountRepository in com.controller.LoginController required a bean named 'entityManagerFactory' that could not be found.
Action:
Consider defining a bean named 'entityManagerFactory' in your configuration.
您已经排除了Spring Boot的DataSource自动配置，并且似乎没有手动配置DataSource bean。 JPA需要一个DataSource，所以没有一个，JPA将不会自动配置。因此，没有EntityManagerFactory bean可用，因此你看到的失败。
要解决这个问题，你需要一个DataSource bean。获取一个的最简单方法是删除禁用自动配置的配置：
spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration