基本框架搭建——（难度：无，等级：0）

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>my-cloud</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>my-cloud-account</module>
        <module>my-cloud-app</module>
        <module>my-cloud-common</module>
        <module>my-cloud-data</module>
        <module>my-cloud-gateway</module>
        <module>my-cloud-link</module>
        <module>my-cloud-shop</module>
    </modules>

    <properties>

        <!--JDK版本，如果是jdk8则这里是 1.8-->
        <java.version>1.8</java.version>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>


        <spring.boot.version>2.5.5</spring.boot.version>
        <spring.cloud.version>2020.0.4</spring.cloud.version>
        <alibaba.cloud.version>2021.1</alibaba.cloud.version>

        <mybatisplus.boot.starter.version>3.4.0</mybatisplus.boot.starter.version>
        <lombok.version>1.18.16</lombok.version>
        <commons.lang3.version>3.9</commons.lang3.version>
        <commons.codec.version>1.15</commons.codec.version>

        <xxl-job.version>2.3.0</xxl-job.version>

        <aliyun.oss.version>3.10.2</aliyun.oss.version>

        <captcha.version>1.1.0</captcha.version>

        <docker.image.prefix>dcloud</docker.image.prefix>

        <redission.version>3.10.1</redission.version>
        <jwt.version>0.7.0</jwt.version>
        <sharding-jdbc.version>4.1.1</sharding-jdbc.version>
        <!--跳过单元测试-->
        <skipTests>true</skipTests>
        <junit.version>4.12</junit.version>
        <druid.version>1.1.16</druid.version>

    </properties>

    <!--锁定版本-->
    <dependencyManagement>
        <dependencies>
            <!--https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-dependencies/2.3.3.RELEASE-->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring.boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <!--https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-dependencies/Hoxton.SR8-->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring.cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <!--https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-alibaba-dependencies/2.2.1.RELEASE-->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${alibaba.cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>



            <!--mybatis plus和springboot整合-->
            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-boot-starter</artifactId>
                <version>${mybatisplus.boot.starter.version}</version>
            </dependency>

            <!--https://mvnrepository.com/artifact/org.projectlombok/lombok/1.18.16-->
            <!--scope=provided，说明它只在编译阶段生效，不需要打入包中, Lombok在编译期将带Lombok注解的Java文件正确编译为完整的Class文件-->
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>${lombok.version}</version>
                <!--<scope>provided</scope>-->
            </dependency>



            <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
            <dependency>
                <groupId>org.apache.commons</groupId>
                <artifactId>commons-lang3</artifactId>
                <version>${commons.lang3.version}</version>
            </dependency>

            <!-- https://mvnrepository.com/artifact/commons-codec/commons-codec -->
            <!--用于加密-->
            <dependency>
                <groupId>commons-codec</groupId>
                <artifactId>commons-codec</artifactId>
                <version>${commons.codec.version}</version>
            </dependency>





            <!--验证码kaptcha依赖包-->
            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>kaptcha-spring-boot-starter</artifactId>
                <version>${captcha.version}</version>
            </dependency>


            <!--阿里云oss-->
            <dependency>
                <groupId>com.aliyun.oss</groupId>
                <artifactId>aliyun-sdk-oss</artifactId>
                <version>${aliyun.oss.version}</version>
            </dependency>



            <!-- JWT相关 -->
            <dependency>
                <groupId>io.jsonwebtoken</groupId>
                <artifactId>jjwt</artifactId>
                <version>${jwt.version}</version>
            </dependency>



            <!--分布式锁-->
            <dependency>
                <groupId>org.redisson</groupId>
                <artifactId>redisson</artifactId>
                <version>${redission.version}</version>
            </dependency>



            <!--https://mvnrepository.com/artifact/org.apache.shardingsphere/sharding-jdbc-spring-boot-starter-->
            <dependency>
                <groupId>org.apache.shardingsphere</groupId>
                <artifactId>sharding-jdbc-spring-boot-starter</artifactId>
                <version>${sharding-jdbc.version}</version>
            </dependency>


            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>${junit.version}</version>
            </dependency>


            <!-- https://mvnrepository.com/artifact/com.xuxueli/xxl-job-core -->
            <dependency>
                <groupId>com.xuxueli</groupId>
                <artifactId>xxl-job-core</artifactId>
                <version>${xxl-job.version}</version>
            </dependency>

        </dependencies>
    </dependencyManagement>

    <!-- 代码库 -->
    <repositories>
        <repository>
            <id>maven-ali</id>
            <url>http://maven.aliyun.com/nexus/content/groups/public//</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
                <updatePolicy>always</updatePolicy>
                <checksumPolicy>fail</checksumPolicy>
            </snapshots>
        </repository>
    </repositories>


    <pluginRepositories>
        <pluginRepository>
            <id>public</id>
            <name>aliyun nexus</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>

    <!--module不用添加打包版本信息-->
    <build>
        <plugins>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.1</version>
                <configuration>
                    <skip>true</skip>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>${spring.boot.version}</version>
                <configuration>
                    <fork>true</fork>
                    <addResources>true</addResources>
                </configuration>
            </plugin>
        </plugins>
    </build>


</project>

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>my-cloud</artifactId>
        <groupId>org.example</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>my-cloud-common</artifactId>
    <dependencies>

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

        <!--项目中添加 spring-boot-starter-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>


        <!--数据库连接-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

        <!--mybatis plus-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
        </dependency>


        <!--单元测试-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>


        <!--redis客户端-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>io.lettuce</groupId>
                    <artifactId>lettuce-core</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
        </dependency>



        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
        </dependency>

        <!--用于加密-->
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
        </dependency>

        <!-- JWT相关 -->
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt</artifactId>
        </dependency>


        <!--redisson分布式锁-->
        <dependency>
            <groupId>org.redisson</groupId>
            <artifactId>redisson</artifactId>
        </dependency>

        <!--Hoxton.M2版本之后不再使用Ribbon而是使用spring-cloud-loadbalancer，所以不引入spring-cloud-loadbalancer会报错，所以加入spring-cloud-loadbalancer依赖 并且在nacos中排除ribbon依赖，不然loadbalancer无效 -->

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-loadbalancer</artifactId>
        </dependency>


        <!--配置中心， 留坑，后续用的时候再讲-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>


        <!--Feign远程调用-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>


        <!--限流依赖-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
        </dependency>



        <!--限流持久化到nacos-->

        <dependency>
            <groupId>com.alibaba.csp</groupId>
            <artifactId>sentinel-datasource-nacos</artifactId>
        </dependency>



        <!--Springboot项目整合spring-kafka依赖包配置-->
        <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka</artifactId>
        </dependency>



        <!--引入AMQP-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>


        <!--spring cache依赖包-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-cache</artifactId>
        </dependency>


        <dependency>
            <groupId>org.apache.shardingsphere</groupId>
            <artifactId>sharding-jdbc-spring-boot-starter</artifactId>
        </dependency>


        <!-- https://mvnrepository.com/artifact/com.xuxueli/xxl-job-core -->
        <!--分布式调度-->
        <dependency>
            <groupId>com.xuxueli</groupId>
            <artifactId>xxl-job-core</artifactId>
        </dependency>


        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
        </dependency>

    </dependencies>

</project>

package net.dbc.enums;

import lombok.Getter;

/**
 * @author DBC
 * @version 1.0.0
 * @date 2022年09月03日 11:05:07
 * @packageName net.dbc.enums
 * @className BizCodeEnum
 * @website dbc655.top
 *
 *
 * @Description 状态码定义约束，共6位数，前三位代表服务，后3位代表接口
 * 比如 商品服务210,购物车是220、用户服务230，403代表权限
 */
public enum BizCodeEnum {

    /**
     * 短链分组
     */
    GROUP_REPEAT(23001,"分组名重复"),
    GROUP_OPER_FAIL(23503,"分组名操作失败"),
    GROUP_NOT_EXIST(23404,"分组不存在"),



    /**
     *验证码
     */
    CODE_TO_ERROR(240001,"接收号码不合规"),
    CODE_LIMITED(240002,"验证码发送过快"),
    CODE_ERROR(240003,"验证码错误"),
    CODE_CAPTCHA_ERROR(240101,"图形验证码错误"),



    /**
     * 账号
     */
    ACCOUNT_REPEAT(250001,"账号已经存在"),
    ACCOUNT_UNREGISTER(250002,"账号不存在"),
    ACCOUNT_PWD_ERROR(250003,"账号或者密码错误"),
    ACCOUNT_UNLOGIN(250004,"账号未登录"),


    /**
     * 短链
     */
    SHORT_LINK_NOT_EXIST(260404,"短链不存在"),


    /**
     * 订单
     */
    ORDER_CONFIRM_PRICE_FAIL(280002,"创建订单-验价失败"),
    ORDER_CONFIRM_REPEAT(280008,"订单恶意-重复提交"),
    ORDER_CONFIRM_TOKEN_EQUAL_FAIL(280009,"订单令牌缺少"),
    ORDER_CONFIRM_NOT_EXIST(280010,"订单不存在"),

    /**
     * 支付
     */
    PAY_ORDER_FAIL(300001,"创建支付订单失败"),
    PAY_ORDER_CALLBACK_SIGN_FAIL(300002,"支付订单回调验证签失败"),
    PAY_ORDER_CALLBACK_NOT_SUCCESS(300003,"支付宝回调更新订单失败"),
    PAY_ORDER_NOT_EXIST(300005,"订单不存在"),
    PAY_ORDER_STATE_ERROR(300006,"订单状态不正常"),
    PAY_ORDER_PAY_TIMEOUT(300007,"订单支付超时"),


    /**
     * 流控操作
     */
    CONTROL_FLOW(500101,"限流控制"),
    CONTROL_DEGRADE(500201,"降级控制"),
    CONTROL_AUTH(500301,"认证控制"),


    /**
     * 流量包操作
     */
    TRAFFIC_FREE_NOT_EXIST(600101,"免费流量包不存在，联系客服"),

    TRAFFIC_REDUCE_FAIL(600102,"流量不足，扣减失败"),

    TRAFFIC_EXCEPTION(600103,"流量包数据异常,用户无流量包"),


    /**
     * 通用操作码
     */

    OPS_REPEAT(110001,"重复操作"),
    OPS_NETWORK_ADDRESS_ERROR(110002,"网络地址错误"),


    /**
     * 文件相关
     */
    FILE_UPLOAD_USER_IMG_FAIL(700101,"用户头像文件上传失败");

    @Getter
    private String message;

    @Getter
    private int code;

    private BizCodeEnum(int code, String message){
        this.code = code;
        this.message = message;
    }
}

package net.dbc.utils;

import lombok.extern.slf4j.Slf4j;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.security.MessageDigest;
import java.util.*;

/**
 * @author DBC
 * @version 1.0.0
 * @date 2022年09月03日 12:52:24
 * @website dbc655.top
 */
@Slf4j
public class CommonUtil {

    /**
     * 获取ip
     *
     * @param request
     * @return
     */
    public static String getIpAddr(HttpServletRequest request) {
        String ipAddress = null;
        try {
            ipAddress = request.getHeader("x-forwarded-for");
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getHeader("Proxy-Client-IP");
            }
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getHeader("WL-Proxy-Client-IP");
            }
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getRemoteAddr();
                if (ipAddress.equals("127.0.0.1")) {
                    // 根据网卡取本机配置的IP
                    InetAddress inet = null;
                    try {
                        inet = InetAddress.getLocalHost();
                    } catch (UnknownHostException e) {
                        e.printStackTrace();
                    }
                    ipAddress = inet.getHostAddress();
                }
            }
            // 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
            if (ipAddress != null && ipAddress.length() > 15) {
                // "***.***.***.***".length()
                // = 15
                if (ipAddress.indexOf(",") > 0) {
                    ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
                }
            }
        } catch (Exception e) {
            ipAddress = "";
        }
        return ipAddress;
    }


    /**
     * 获取全部请求头
     * @param request
     * @return
     */
    public static Map<String, String> getAllRequestHeader(HttpServletRequest request){
        Enumeration<String> headerNames = request.getHeaderNames();
        Map<String, String> map = new HashMap<>();
        while (headerNames.hasMoreElements()) {
            String key = (String)headerNames.nextElement();
            //根据名称获取请求头的值
            String value = request.getHeader(key);
            map.put(key,value);
        }

        return map;
    }


    /**
     * MD5加密
     *
     * @param data
     * @return
     */
    public static String MD5(String data) {
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            byte[] array = md.digest(data.getBytes("UTF-8"));
            StringBuilder sb = new StringBuilder();
            for (byte item : array) {
                sb.append(Integer.toHexString((item & 0xFF) | 0x100).substring(1, 3));
            }

            return sb.toString().toUpperCase();
        } catch (Exception exception) {
        }
        return null;

    }


    /**
     * 获取验证码随机数
     *
     * @param length
     * @return
     */
    public static String getRandomCode(int length) {

        String sources = "0123456789";
        Random random = new Random();
        StringBuilder sb = new StringBuilder();
        for (int j = 0; j < length; j++) {
            sb.append(sources.charAt(random.nextInt(9)));
        }
        return sb.toString();
    }


    /**
     * 获取当前时间戳
     *
     * @return
     */
    public static long getCurrentTimestamp() {
        return System.currentTimeMillis();
    }


    /**
     * 生成uuid
     *
     * @return
     */
    public static String generateUUID() {
        return UUID.randomUUID().toString().replaceAll("-", "").substring(0, 32);
    }

    /**
     * 获取随机长度的串
     *
     * @param length
     * @return
     */
    private static final String ALL_CHAR_NUM = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

    public static String getStringNumRandom(int length) {
        //生成随机数字和字母,
        Random random = new Random();
        StringBuilder saltString = new StringBuilder(length);
        for (int i = 1; i <= length; ++i) {
            saltString.append(ALL_CHAR_NUM.charAt(random.nextInt(ALL_CHAR_NUM.length())));
        }
        return saltString.toString();
    }


    /**
     * 响应json数据给前端
     *
     * @param response
     * @param obj
     */
    public static void sendJsonMessage(HttpServletResponse response, Object obj) {

        response.setContentType("application/json; charset=utf-8");

        try (PrintWriter writer = response.getWriter()) {
            writer.print(JsonUtil.obj2Json(obj));
            response.flushBuffer();

        } catch (IOException e) {
            log.warn("响应json数据给前端异常:{}",e);
        }


    }

}

package net.dbc.utils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import net.dbc.enums.BizCodeEnum;

/**
 * @author DBC
 * @version 1.0.0
 * @date 2022年09月03日 11:08:15
 * @website dbc655.top
 */
@Data
@AllArgsConstructor
@NoArgsConstructor
public class JsonData {
    /**
     * 状态码 0 表示成功
     */

    private Integer code;
    /**
     * 数据
     */
    private Object data;
    /**
     * 描述
     */
    private String msg;


    /**
     *  获取远程调用数据
     *  注意事项：
     *      支持多单词下划线专驼峰（序列化和反序列化）
     *
     *
     * @param typeReference
     * @param <T>
     * @return
     */
    public <T> T getData(TypeReference<T> typeReference){
        return JSON.parseObject(JSON.toJSONString(data),typeReference);
    }

    /**
     * 成功，不传入数据
     * @return
     */
    public static JsonData buildSuccess() {
        return new JsonData(0, null, null);
    }

    /**
     *  成功，传入数据
     * @param data
     * @return
     */
    public static JsonData buildSuccess(Object data) {
        return new JsonData(0, data, null);
    }

    /**
     * 失败，传入描述信息
     * @param msg
     * @return
     */
    public static JsonData buildError(String msg) {
        return new JsonData(-1, null, msg);
    }



    /**
     * 自定义状态码和错误信息
     * @param code
     * @param msg
     * @return
     */
    public static JsonData buildCodeAndMsg(int code, String msg) {
        return new JsonData(code, null, msg);
    }

    /**
     * 传入枚举，返回信息
     * @param codeEnum
     * @return
     */
    public static JsonData buildResult(BizCodeEnum codeEnum){
        return JsonData.buildCodeAndMsg(codeEnum.getCode(),codeEnum.getMessage());
    }
}

package net.dbc.utils;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import lombok.extern.slf4j.Slf4j;

import java.text.SimpleDateFormat;
import java.util.List;

/**
 * @author DBC
 * @version 1.0.0
 * @date 2022年09月03日 12:49:45
 * @website dbc655.top
 */
@Slf4j
public class JsonUtil {
    private static final ObjectMapper mapper = new ObjectMapper();

    static {

        //设置可用单引号
        mapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);

        //序列化的时候序列对象的所有属性
        mapper.setSerializationInclusion(JsonInclude.Include.ALWAYS);

        //反序列化的时候如果多了其他属性,不抛出异常
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);

        //如果是空对象的时候,不抛异常
        mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);

        //取消时间的转化格式,默认是时间戳,可以取消,同时需要设置要表现的时间格式
        mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
        mapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
    }



    /**
     * 对象转为Json字符串
     * @param obj
     * @return
     */
    public static String obj2Json(Object obj) {
        String jsonStr = null;
        try {
            jsonStr = mapper.writeValueAsString(obj);
        } catch (JsonProcessingException e) {
            log.error("json格式异常：{}",e);
        }
        return jsonStr;
    }
    /**
     * json字符串转为对象
     * @param jsonStr
     * @param beanType
     * @return
     */
    public static <T> T json2Obj(String jsonStr, Class<T> beanType) {
        T obj = null;
        try {
            obj = mapper.readValue(jsonStr, beanType);
        } catch (Exception e){
            log.error("json格式异常：{}",e);
        }
        return obj;
    }


    /**
     * json数据转换成pojo对象list
     * @param jsonData
     * @param beanType
     * @return
     */
    public static <T> List<T> json2List(String jsonData, Class<T> beanType) {
        JavaType javaType = mapper.getTypeFactory().constructParametricType(List.class, beanType);
        try {
            List<T> list = mapper.readValue(jsonData, javaType);
            return list;
        } catch (Exception e) {
            log.error("json格式异常：{}",e);
        }
        return null;
    }

    /**
     * 对象转为byte数组
     * @param obj
     * @return
     */
    public static byte[] obj2Bytes(Object obj) {
        byte[] byteArr = null;
        try {
            byteArr = mapper.writeValueAsBytes(obj);
        } catch (JsonProcessingException e) {
            log.error("json格式异常：{}",e);
        }
        return byteArr;
    }



    /**
     * byte数组转为对象
     * @param byteArr
     * @param beanType
     * @return
     */
    public static <T> T bytes2Obj(byte[] byteArr, Class<T> beanType) {
        T obj = null;
        try {
            obj = mapper.readValue(byteArr, beanType);
        } catch (Exception e) {
            log.error("json格式异常：{}",e);
        }
        return obj;
    }
}

package net.dbc.utils;

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;
import java.util.Date;

/**
 * @author DBC
 * @version 1.0.0
 * @date 2022年09月03日 12:46:34
 * @website dbc655.top
 */
public class TimeUtil {
    /**
     * 默认日期格式
     */
    private static final String DEFAULT_PATTERN = "yyyy-MM-dd HH:mm:ss";

    /**
     * 默认日期格式
     */
    private static final DateTimeFormatter DEFAULT_DATE_TIME_FORMATTER  = DateTimeFormatter.ofPattern(DEFAULT_PATTERN);

    private static final ZoneId DEFAULT_ZONE_ID = ZoneId.systemDefault();


    /**
     * LocalDateTime 转 字符串，指定日期格式
     * @param localDateTime
     * @param pattern
     * @return
     */
    public static String format(LocalDateTime localDateTime, String pattern){
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
        String timeStr = formatter.format(localDateTime.atZone(DEFAULT_ZONE_ID));
        return timeStr;
    }


    /**
     * Date 转 字符串, 指定日期格式
     * @param time
     * @param pattern
     * @return
     */
    public static String format(Date time, String pattern){
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
        String timeStr = formatter.format(time.toInstant().atZone(DEFAULT_ZONE_ID));
        return timeStr;
    }

    /**
     *  Date 转 字符串，默认日期格式
     * @param time
     * @return
     */
    public static String format(Date time){

        String timeStr = DEFAULT_DATE_TIME_FORMATTER.format(time.toInstant().atZone(DEFAULT_ZONE_ID));
        return timeStr;
    }

    /**
     * timestamp 转 字符串，默认日期格式
     *
     * @param timestamp
     * @return
     */
    public static String format(long timestamp) {
        String timeStr = DEFAULT_DATE_TIME_FORMATTER.format(new Date(timestamp).toInstant().atZone(DEFAULT_ZONE_ID));
        return timeStr;
    }


    /**
     * 字符串 转 Date
     *
     * @param time
     * @return
     */
    public static Date strToDate(String time) {
        LocalDateTime localDateTime = LocalDateTime.parse(time, DEFAULT_DATE_TIME_FORMATTER);
        return Date.from(localDateTime.atZone(DEFAULT_ZONE_ID).toInstant());

    }


    /**
     * 获取当天剩余的秒数,用于流量包过期配置
     * @param currentDate
     * @return
     */
    public static Integer getRemainSecondsOneDay(Date currentDate) {
        LocalDateTime midnight = LocalDateTime.ofInstant(currentDate.toInstant(),
                ZoneId.systemDefault()).plusDays(1).withHour(0).withMinute(0)
                .withSecond(0).withNano(0);
        LocalDateTime currentDateTime = LocalDateTime.ofInstant(currentDate.toInstant(),
                ZoneId.systemDefault());
        long seconds = ChronoUnit.SECONDS.between(currentDateTime, midnight);
        return (int) seconds;
    }
}