mysql - 应用程序无法启动 :::“无法配置数据源：未指定 'url' 属性，并且无法配置嵌入式数据源。”
问题描述
我对 Spring Boot 还很陌生，并且正在从事一个项目，但是在我的控制台中没有指定 URL 属性的错误。
Application.properties 文件
spring.datasourse.url=jdbc:mysql://localhost:3306/employee_directory?useSSL=false&serverTimeZone=UTC
spring.datasourse.username=springstudent
spring.datasourse.password=springstudent
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.jpa.database-platform = org.hibernate.dialect.MySQL5Dialect
spring.jpa.generate-ddl=true
spring.jpa.hibernate.ddl-auto = update
我的 pom.xml 文件（~使用 spring.io 生成）
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.luv2code.springboot</groupId>
<artifactId>cruddemo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>cruddemo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!-- --> <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
我知道我的错误似乎在应用程序属性文件中，但我检查了这些文件，但似乎找不到任何错误。
我的应用
package com.luv2code.springboot.cruddemo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class CruddemoApplication {
public static void main(String[] args) {
SpringApplication.run(CruddemoApplication.class, args);
}
}
我的员工DAOImpl
package com.luv2code.springboot.cruddemo.dao;
import java.util.List;
import javax.persistence.EntityManager;
import org.hibernate.Session;
import org.hibernate.query.Query;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import com.luv2code.springboot.cruddemo.entity.Employee;
@Repository
public class EmployeeDAOHibernateImpl implements EmployeeDAO {
private EntityManager entityManager;
@Autowired
public EmployeeDAOHibernateImpl(EntityManager theEntityManager) {
entityManager = theEntityManager;
}
@Override
public List<Employee> findAll() {
Session currentSession = entityManager.unwrap(Session.class);
Query<Employee> theQuery = currentSession.createQuery("from Employee", Employee.class);
List<Employee> employees = theQuery.getResultList();
return employees;
}
@Override
public Employee findById(int theId) {
Session currentSession = entityManager.unwrap(Session.class);
Employee theEmployee = currentSession.get(Employee.class, theId);
return theEmployee;
}
@Override
public void save(Employee theEmployee) {
Session currentSession = entityManager.unwrap(Session.class);
currentSession.saveOrUpdate(theEmployee);
}
@Override
public void delete(int theId) {
Session currentSession = entityManager.unwrap(Session.class);
Query theQuery = currentSession.createQuery("delete from Employee where id=:employeeId");
theQuery.setParameter("employeeId", theId);
theQuery.executeUpdate();
}
}
我的员工道
package com.luv2code.springboot.cruddemo.dao;
import java.util.List;
import com.luv2code.springboot.cruddemo.entity.Employee;
public interface EmployeeDAO {
public List<Employee> findAll();
public Employee findById(int theId);
public void save(Employee theEmployee);
public void delete(int theId);
}
我的错误屏幕
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.3.3.RELEASE)
2020-08-24 14:03:56.750 INFO 11608 --- [ restartedMain] c.l.s.cruddemo.CruddemoApplication : Starting CruddemoApplication on DESKTOP-AR3MS4U with PID 11608 (D:\Eclipse && STS\eclipse\cruddemo\target\classes started by Abhijay in D:\Eclipse && STS\eclipse\cruddemo)
2020-08-24 14:03:56.763 INFO 11608 --- [ restartedMain] c.l.s.cruddemo.CruddemoApplication : No active profile set, falling back to default profiles: default
2020-08-24 14:03:56.990 INFO 11608 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2020-08-24 14:03:56.991 INFO 11608 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2020-08-24 14:04:00.471 INFO 11608 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2020-08-24 14:04:00.493 INFO 11608 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-08-24 14:04:00.494 INFO 11608 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.37]
2020-08-24 14:04:00.957 INFO 11608 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-08-24 14:04:00.957 INFO 11608 --- [ restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 3965 ms
2020-08-24 14:04:01.323 WARN 11608 --- [ restartedMain] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'employeeDAOHibernateImpl' defined in file [D:\Eclipse && STS\eclipse\cruddemo\target\classes\com\luv2code\springboot\cruddemo\dao\EmployeeDAOHibernateImpl.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'javax.persistence.EntityManager' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
2020-08-24 14:04:01.331 INFO 11608 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2020-08-24 14:04:01.380 INFO 11608 --- [ restartedMain] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-08-24 14:04:02.111 ERROR 11608 --- [ restartedMain] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Parameter 0 of constructor in com.luv2code.springboot.cruddemo.dao.EmployeeDAOHibernateImpl required a bean of type 'javax.persistence.EntityManager' that could not be found.
Action:
Consider defining a bean of type 'javax.persistence.EntityManager' in your configuration.
解决方案
推荐阅读
- python - kivy 应用可以在电脑上运行，但不能在智能手机上运行
- jar - 带有外部 JAR 的项目在本地运行良好，但在部署到 Openshift 时却不行
- php - Bref PHP 将会话存储在 redis 中但无法读取
- node.js - grpc 使用了错误的 IP 地址
- asp.net - 从控制器发送日期值以创建视图
- shopify - 使用 API 的类别和子类别 - 无头
- javascript - 如何从 React 修改 PSQL 表？
- php - 组合 php 数组的键值以获取输入值
- javascript - XMLHttpRequest 问题已被 CORS 策略阻止：
- binary - 4 位二进制补码溢出