springboot分布式id，基于snowflake的分布式统一id生成工具

如不设置表自增长，那么此处唯一id可设置 IdType.ASSIGN_ID，单机版用mybatis默认的雪花算法IdentifierGenerator 即可,集群版推荐使用zookeeper，snowflake的分布式统一ID生成工具idworker .

<!--pom添加包idworker-->  
<dependency>
            <groupId>com.imadcn.framework</groupId>
            <artifactId>idworker</artifactId>
            <version>1.6.0</version>
            <exclusions>
                <exclusion>
                    <artifactId>curator-client</artifactId>
                    <groupId>org.apache.curator</groupId>
                </exclusion>
            </exclusions>
        </dependency>

package com.cn.dydatasource;

import com.baomidou.mybatisplus.autoconfigure.ConfigurationCustomizer;
import com.baomidou.mybatisplus.core.MybatisConfiguration;
import com.baomidou.mybatisplus.core.incrementer.DefaultIdentifierGenerator;
import com.baomidou.mybatisplus.core.incrementer.IdentifierGenerator;
import com.baomidou.mybatisplus.core.incrementer.ImadcnIdentifierGenerator;
import com.github.pagehelper.util.StringUtil;
import com.imadcn.framework.idworker.config.ApplicationConfiguration;
import com.imadcn.framework.idworker.config.ZookeeperConfiguration;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * 分布式id问题
 */
@Configuration()
@ConfigurationProperties(prefix = "mybatis-plus.zookeeper")
public class MybatisConfig {
    private String serverLists;

    public String getServerLists() {
        return serverLists;
    }

    public void setServerLists(String serverLists) {
        this.serverLists = serverLists;
    }


    //zookeeper 解决分布式id重复问题
    //默认是 根据ip来进行 增长的 如果ip相同  同一台机器 生成的id是不会重复的  所以同一个业务写入集部署情况 应放置在不同的服务器


    @Bean
    public IdentifierGenerator idGenerator() {
        if(!StringUtil.isEmpty(serverLists)){
            ZookeeperConfiguration zkConfig = new ZookeeperConfiguration();
            zkConfig.setServerLists(serverLists);
            zkConfig.setSessionTimeoutMilliseconds(3000);
            ApplicationConfiguration applicationConfiguration=new ApplicationConfiguration();
            applicationConfiguration.setSerialize("fastjson");
            return new ImadcnIdentifierGenerator(zkConfig,applicationConfiguration);
        }
        return  new DefaultIdentifierGenerator();
    }



}

注:application.yml中需添加zookeeper配置