1、阿里云短息服务注册

阿里云官网：https://www.aliyun.com/

①进入短信服务

②免费开通

③选择国内消息–>签名管理–>添加签名

签名内容

④添加模版

⑤安全设置、发送频率设置

⑥账户充值

⑦AccessKey管理

2、Java代码引入

①导入依赖包

 <dependencies>
 	 <!--原版 SDK - 阿里云Java SDK核心库-->
    <dependency>
        <groupId>com.aliyun</groupId>
        <artifactId>aliyun-java-sdk-core</artifactId>
        <version>4.5.16</version>
    </dependency>

    <!--阿里 FastJSON，json格式转换-->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.39</version>
    </dependency>

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

    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>

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

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

③测试工具类

/**
 * 短信发送工具类
 */
public class SMSUtils {

	/**
	 * 发送短信
	 * @param signName 签名
	 * @param templateCode 模板
	 * @param phoneNumbers 手机号
	 * @param param 参数
	 */
	public static void sendMessage(String signName, String templateCode,String phoneNumbers,String param){
		DefaultProfile profile = DefaultProfile.getProfile("cn-hangzhou", "LTAI5tMfFL3veTQthSxpBWKd", "l38UcRzcPrXDlHEg0HhqUBH7HZSdc8");
		IAcsClient client = new DefaultAcsClient(profile);
		SendSmsRequest request = new SendSmsRequest();
		request.setSysRegionId("cn-hangzhou");
		request.setPhoneNumbers(phoneNumbers);
		request.setSignName(signName);
		request.setTemplateCode(templateCode);
		request.setTemplateParam("{\"code\":\""+param+"\"}");
		try {
			SendSmsResponse response = client.getAcsResponse(request);
			System.out.println("短信发送成功");
		}catch (ClientException e) {
			e.printStackTrace();
		}
	}

}

④测试

@PostMapping("/sendMsg")
    public R<String> sendMsg(@RequestBody User user, HttpSession session){
        //获取手机号
        String phone=user.getPhone();
        if(StringUtils.isNotEmpty(phone)){
            //生成随机的6位验证码
            String code= ValidateCodeUtils.generateValidateCode(6).toString();
            log.info("code={}",code);
            //调用阿里云提供的短信服务API完成发送短信
            SMSUtils.sendMessage("好食餐饮","SMS_462585304",phone,code);
            //需要将生成的验证码保存到Session
            session.setAttribute(phone,code);
            return  R.success("手机验证码短信发送成功");
        }
        return  R.error("短信发送失败");
    }