SpringBoot项目搭建一-蒲公英云

SpringBoot项目搭建一

小鱼儿 2022-05-27 08:15 386阅读 0赞

Spring Boot Maven配置

Spring Boot也可以通过maven创建项目

一个简单的pom.xml

<?xml version=”1.0” encoding=”UTF-8”?>

4.0.0

com.example
myproject
0.0.1-SNAPSHOT

org.springframework.boot
spring-boot-starter-parent
2.0.1.RELEASE

org.springframework.boot
spring-boot-starter-web
配置好pom.xml后，可以通过导入idea进行自动以来安装，也可以通过命令行安装以来包

命令行安装依赖包

mvn dependency:tree

服务器代码

创建一个文件 /src/main/java/com/example/demo, 文件内容如下:

package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
@RestController
@SpringBootApplication
public class DemoApplication { 
    @RequestMapping("/")
    String home() {
        return "Hello World!";
    }
    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }
}

运行后，出现一下错误:

Failed to auto-configure a DataSource: 'spring.datasource.url' is not specified and no embedded datasource could be auto-configured.
Reason: Failed to determine a suitable driver class
Action:
Consider the following:
    If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
    If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).

解决方法:
在resources/application.properties文件中添加如下内容

spring.datasource.url=jdbc:mysql://localhost/dbname
spring.datasource.username=user
spring.datasource.password=password
spring.datasource.driver-class-name=com.mysql.jdbc.Driver