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全局ID生成器:SpringBoot2.x 集成百度 uidgenerator
https://izlzl.com/archives/1276.html
2021-03-07T22:27:00+08:00
因为升级 使用springboot2.x java 11 的关系,根据官方文档和网上其他作者配置的怎么也配置不成功,最后自己一步一步升级引入依赖,修改增加接口注入来源,最后成功。升级成功后的源码地址:https://github.com/foxiswho/java-spring-boot-uid-generator-baidu部分升级说明这里的升级,是升级 官方 代码依赖官方代码地址:https://github.com/baidu/uid-generator升级spring boot 版本: 2.0.7.RELEASE升级 mybatis,mybatis-spring 版本升级 mysql-connector-java 版本:8.0.12升级 junit 版本创建数据库存导入官网数据库SQL https://github.com/baidu/uid-generator/blob/master/src/main/scripts/WORKER_NODE.sql也就是一张表我这里是在 demo 库中,创建了这张表DROP TABLE IF EXISTS WORKER_NODE;
CREATE TABLE WORKER_NODE
(
ID BIGINT NOT NULL AUTO_INCREMENT COMMENT 'auto increment id',
HOST_NAME VARCHAR(64) NOT NULL COMMENT 'host name',
PORT VARCHAR(64) NOT NULL COMMENT 'port',
TYPE INT NOT NULL COMMENT 'node type: ACTUAL or CONTAINER',
LAUNCH_DATE DATE NOT NULL COMMENT 'launch date',
MODIFIED TIMESTAMP NOT NULL COMMENT 'modified time',
CREATED TIMESTAMP NOT NULL COMMENT 'created time',
PRIMARY KEY(ID)
)
COMMENT='DB WorkerID Assigner for UID Generator',ENGINE = INNODB;如果报错,基本上是时间问题,因为mysql 低版本控制比较严格,解决方法有多种方式方式一:直接把TIMESTAMP改成DATETIME 即可方式二:执行SQL 语句前先执行:set sql_mode="NO_ENGINE_SUBSTITUTION";mysql 配置信息更改因为升级到8.x ,配置文件部分也要跟着修改 uid-generator 下,测试文件夹下的资源包 uid/mysql.properties以下修改为mysql.driver=com.mysql.cj.jdbc.Driver修改完成后,配置好数据库相关参数,这样单元测试即可执行成功案例计划将全局生成唯一ID作为一个服务提供者,供其他微服务使用调用这里创建了一个项目,项目中包含两个子项目一个是 uid-generator 官方本身,当然你也可以不需要放到本项目中,直接使用官方的自行打包即可,一个是 uid-provider 服务提供者以下说明的主要是服务提供者创建 子项目 uid-provider如何创建 略POM配置文件如下<?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>java-spring-boot-uid-generator-baidu</artifactId>
<groupId>com.foxwho.demo</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>uid-provider</artifactId>
<dependencies>
<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>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
</dependency>
<!--for Mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
<version>8.0.12</version>
</dependency>
<!-- druid -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.16</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<optional>true</optional>
</dependency>
<dependency>
<groupId>com.foxwho.demo</groupId>
<artifactId>uid-generator</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>
</project>复制 mapper先在 uid-provider 项目资源包路径下创建 mapper 文件夹,然后到官方 uid-generator 资源包路径下 META-INF/mybatis/mapper/WORKER_NODE.xml 复制 WORKER_NODE.xml 文件,粘贴到该文件夹 mapper 内cache id 配置文件先在 uid-provider 项目资源包路径下创建 uid 文件夹,然后到官方 uid-generator 测试 [注意:这里是测试资源包] 资源包路径下 uid/cached-uid-spring.xml 复制 cached-uid-spring.xml 文件,粘贴到该文件夹 uid 内最后根据需要 配置参数,可以看官方说明创建 spring boot 启动入口主要就是加上注解 @MapperScan("com.baidu.fsg.uid") 让 mybatis 能扫描到 Mapper 类的包的路径package com.foxwho.demo;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
@SpringBootApplication
@MapperScan("com.baidu.fsg.uid")
public class ConsumerApplication {
public static void main(String[] args) {
new SpringApplicationBuilder(ConsumerApplication.class).run(args);
}
}创建配置package com.foxwho.demo.config;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.ImportResource;
@Configuration
@ImportResource(locations = { "classpath:uid/cached-uid-spring.xml" })
public class UidConfig {
}创建服务接口package com.foxwho.demo.service;
import com.baidu.fsg.uid.UidGenerator;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
@Service
public class UidGenService {
@Resource(name = "cachedUidGenerator")
private UidGenerator uidGenerator;
public long getUid() {
return uidGenerator.getUID();
}
}主要说明一下 @Resource(name = "cachedUidGenerator") 以往错误都是少了这里,没有标明注入来源控制器package com.foxwho.demo.controller;
import com.foxwho.demo.service.UidGenService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class UidController {
@Autowired
private UidGenService uidGenService;
@GetMapping("/uidGenerator")
public String UidGenerator() {
return String.valueOf(uidGenService.getUid());
}
@GetMapping("/")
public String index() {
return "index";
}
}项目配置文件server.port=8080
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/demo?useUnicode=true&characterEncoding=utf-8&useSSL=false
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
mybatis.mapper-locations=classpath:mapper/*.xml
mybatis.configuration.map-underscore-to-camel-case=true启动项目从启动入口,启动,然后访问浏览器http://localhost:8080/uidGenerator页面输出13128615512260612原文地址:https://foxwho.blog.csdn.net/article/details/90200602