简单的springboot项目测试数据源是否连接成功

1、创建项目

2、

3、

4、

5、

测试mysql连接数据源，勾选上面两个即可，然后next，完成就创建好了。

6、注意：

pom.xml文件内容

<?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>2.3.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.yww</groupId>
    <artifactId>springboot_jh</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot_jh</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-web</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.27</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>

        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.1</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

7、yml配置

代码：我修改了端口8088

server:
  port: 8088
spring:
    datasource:
      username: root
      password: 1234
      url: jdbc:mysql://127.0.0.1:3306/db2019
      driver-class-name: com.mysql.jdbc

8、test包下做测试

代码：

package com.yww.springboot_jh;

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

import javax.sql.DataSource;

@SpringBootTest(properties = "workerClassName=A")
class SpringbootJhApplicationTests {
    @Autowired
    DataSource dataSource;

    @Test
    void contextLoads() throws Exception {
        System.out.println("获取的数据库连接为:"+dataSource.getConnection());
    }


}

9、看到如下就是连接成功：

10：附上小姐姐测试时候遇到的错误以及解决办法：

java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)

 

这个错误一般 1、好好检查yml配置，2、数据源配置时候连接的用户名密码不对