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详解SpringBoot Mongo 自增长ID有序规则

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本文主要介绍springboot基于mongodb有序id生成，文中通过示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

概述：本文主要介绍springboot基于mongodb有序id生成，如生成工单编号GD202109290001。单机情况下效率每秒生成5000个有序ID。

实现方式如下

maven

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

代码编写

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@Document
@Data
public class Incr {
 
    @Id
    private String id;
 
    private String collectionName;
 
    private Long incrId;
}
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@Service
public class IncrService {
 
    @Autowired
    private MongoTemplate mongoTemplate;
 
    /**
     * 获取自增ID
     * @param collectionName
     * @return
     */
    public Long getIncrId(String collectionName){
        Query query = new Query(Criteria.where("collectionName").is(collectionName));
        Update update = new Update();
        update.inc("incrId");
        FindAndModifyOptions options = FindAndModifyOptions.options();
        options.upsert(true);
        options.returnNew(true);
        Incr incr = mongoTemplate.findAndModify(query,update,options,Incr.class);
        return incr.getIncrId();
    }
 
}
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@RestController
@RequestMapping(value = "incr")
public class IncrController {
 
    @Autowired
    private IncrService incrService;
 
    @RequestMapping(value = "test")
    public Object test(){
        long start = System.currentTimeMillis();
        List<String> aas = new ArrayList<>();
        for (int i=0;i<10000;i++){
            aas.add(i+"");
        }
        int i = 0;
        aas.parallelStream().forEach(aa -> {
            incrService.getIncrId(aa+"");
        });
        System.out.println(System.currentTimeMillis()-start);
        return true;
    }
}

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原文链接：https://juejin.cn/post/7013175299638575135