SpringBoot整合ShardingSphere的示例代码

• 二、nacos数据源配置

概要： shardingsphere是一套开源的分布式数据库中间件解决方案组成的生态圈，它由sharding-jdbc、sharding-proxy和sharding-sidecar（计划中）这3款相互独立的产品组成。 他们均提供标准化的数据分片、分布式事务和数据库治理功能，可适用于如java同构、异构语言、云原生等各种多样化的应用场景。

官网地址：

一、相关依赖

<dependency>
   <groupid>io.shardingsphere</groupid>
    <artifactid>sharding-core</artifactid>
    <version>3.1.0</version>
</dependency>
<dependency>
    <groupid>io.shardingsphere</groupid>
    <artifactid>sharding-jdbc-spring-namespace</artifactid>
    <version>3.1.0</version>
</dependency>

二、nacos数据源配置

sharding:
  datasource:
    db0:
      driverclassname: com.mysql.cj.jdbc.driver
      url: mysql://127.0.0.1:3306/demo0
      username: root
      password: 123456
    db1:
      driverclassname: com.mysql.cj.jdbc.driver
      url: mysql://127.0.0.1:3306/demo1
      username: root
      password: 123456

三、项目配置

bootstrap-dev.properties
spring:
  application:
    name: demo
  cloud:
    nacos:
      server-addr: 127.0.0.1:8848
      config:
        namespace: 9c6b8156-d045-463d-8fe6-4658ce78d0cc
        file-extension: yml

sqlsessionconfig

package com.example.demo.config;

import com.baomidou.mybatisplus.extension.plugins.paginationinterceptor;
import com.baomidou.mybatisplus.extension.spring.mybatissqlsessionfactorybean;

import org.apache.ibatis.plugin.interceptor;
import org.mybatis.spring.mapper.mapperscannerconfigurer;
import org.slf4j.logger;
import org.slf4j.loggerfactory;
import org.springframework.beans.factory.annotation.qualifier;
import org.springframework.context.annotation.bean;
import org.springframework.context.annotation.configuration;
import org.springframework.core.io.support.pathmatchingresourcepatternresolver;

import javax.sql.datasource;

@configuration
public class sqlsessionconfig {

    private logger logger = loggerfactory.getlogger(sqlsessionconfig.class);
    
    @bean("mysqlsessionfactorybean")
    public mybatissqlsessionfactorybean createsqlsessionfactory(@qualifier("datasource") datasource datasource,
                                                                @qualifier("paginationinterceptor") paginationinterceptor paginationinterceptor) {

        // mybatissqlsessionfactory
        mybatissqlsessionfactorybean sqlsessionfactorybean = null;
        try {
            // 实例sessionfactory
            sqlsessionfactorybean = new mybatissqlsessionfactorybean();
            // 配置数据源
            sqlsessionfactorybean.setdatasource(datasource);
            // 设置 mybatis-plus 分页插件
            interceptor [] plugins = {paginationinterceptor};
            sqlsessionfactorybean.setplugins(plugins);
            // 加载mybatis配置文件
            pathmatchingresourcepatternresolver resourcepatternresolver = new pathmatchingresourcepatternresolver();
            sqlsessionfactorybean.setmapperlocations(resourcepatternresolver.getresources("classpath*:mapper/*.xml"));
        } catch (exception e) {
            logger.error("创建sqlsession连接工厂错误：{}", e.getmessage());
        }
        return sqlsessionfactorybean;
    }

    @bean
    public mapperscannerconfigurer mygetmapperscannerconfigurer() {
        mapperscannerconfigurer mymapperscannerconfigurer = new mapperscannerconfigurer();
        mymapperscannerconfigurer.setbasepackage("com.example.demo.mapper");
        mymapperscannerconfigurer.setsqlsessionfactorybeanname("mysqlsessionfactorybean");
        return mymapperscannerconfigurer;
    }
}

datasourceconfig

package com.example.demo.config;

import com.alibaba.druid.pool.druiddatasource;
import io.shardingsphere.api.config.rule.shardingruleconfiguration;
import io.shardingsphere.shardingjdbc.api.shardingdatasourcefactory;
import org.springframework.beans.factory.annotation.qualifier;
import org.springframework.boot.context.properties.configurationproperties;
import org.springframework.context.annotation.bean;
import org.springframework.context.annotation.configuration;

import javax.sql.datasource;
import java.sql.sqlexception;
import java.util.hashmap;
import java.util.map;
import java.util.properties;

@configuration
@configurationproperties(prefix = "sharding")
public class datasourceconfig  {

    private map<string, druiddatasource> datasource;

    public map<string, druiddatasource> getdatasource() {
        return datasource;
    }

    public void setdatasource(map<string, druiddatasource> datasource) {
        this.datasource = datasource;
    }

    @bean("datasource")
    public datasource getdatasource(@qualifier("shardingconfig") shardingruleconfiguration shardingruleconfig,
                                    @qualifier("properties") properties properties) throws sqlexception {

        map<string, datasource> datasourcemap = new hashmap<>();
        datasource.foreach(datasourcemap::put);
        return shardingdatasourcefactory.createdatasource(datasourcemap, shardingruleconfig, new hashmap<>(), properties);
    }


    @bean("properties")
    public properties getproperties(){
        // 获取数据源对象
        properties props=new properties();
        /*
         * ==== properties取值范围 ====
         *
         * sql_show("sql.show", string.valueof(boolean.false), boolean.type),
         * acceptor_size("acceptor.size", string.valueof(runtime.getruntime().availableprocessors() * 2), integer.type),
         * executor_size("executor.size", string.valueof(0), integer.type),
         * max_connections_size_per_query("max.connections.size.per.query", string.valueof(1), integer.type),
         * proxy_frontend_flush_threshold("proxy.frontend.flush.threshold", string.valueof(128), integer.type),
         * proxy_transaction_type("proxy.transaction.type", "local", string.class),
         * proxy_opentracing_enabled("proxy.opentracing.enabled", string.valueof(boolean.false), boolean.type),
         * proxy_backend_use_nio("proxy.backend.use.nio", string.valueof(boolean.false), boolean.type),
         * proxy_backend_max_connections("proxy.backend.max.connections", string.valueof(8), integer.type),
         * proxy_backend_connection_timeout_seconds("proxy.backend.connection.timeout.seconds", string.valueof(60), integer.type),
         * check_table_metadata_enabled("check.table.metadata.enabled", string.valueof(boolean.false), boolean.type);
         */
        props.put("sql.show", "true");
        return props;
    }
}

shardingruleconfig

package com.example.demo.config;

import io.shardingsphere.api.config.rule.shardingruleconfiguration;
import io.shardingsphere.core.yaml.sharding.yamlshardingconfiguration;
import io.shardingsphere.core.yaml.sharding.yamlshardingruleconfiguration;
import org.springframework.context.annotation.bean;
import org.springframework.context.annotation.configuration;
import org.springframework.beans.factory.annotation.value;

import java.io.file;

@configuration
public class shardingruleconfig implements applicationcontextaware  {

 /* 获取环境变量 */
 @value("${spring.profiles.active}")
    private string profile;

    @bean("shardingconfig")
    public shardingruleconfiguration getshardingruleconfig() throws exception {
  
  // 获取yml路由规则配置文件
        file yamlfile = new file("src/main/resources/sharding/" + profile + "/sharding.yml");
        yamlshardingconfiguration yamlshardingruleconfiguration = yamlshardingconfiguration.unmarshal(yamlfile);
        yamlshardingruleconfiguration shardingrule = yamlshardingruleconfiguration.getshardingrule();
        if (null == shardingrule) {
            throw new exception("yamlshardingruleconfiguration is null!");
        }
        return shardingrule.getshardingruleconfiguration();
        
    }
}

src/main/resources/dev/sharding.yml

shardingrule:
  tables:
    user:
      actualdatanodes: db${0..1}.user${0..1}
      databasestrategy:
        inline:
          shardingcolumn: id
          algorithmexpression: db${id % 2}
      tablestrategy:
        inline:
          shardingcolumn: id
          algorithmexpression: user${id % 2}

注：修复相同路由字段导致部分分表无法落地数据，可以自定义相应规则，例如修改为以下配置：

shardingrule:
  tables:
    user:
      actualdatanodes: db${0..1}.user${0..1}
      databasestrategy:
        inline:
          shardingcolumn: id
          algorithmexpression: db${math.round(id / 2) % 2}
      tablestrategy:
        inline:
          shardingcolumn: id
          algorithmexpression: user${id % 2}

四、验证

2020-05-11 09:51:09.239  info 6352 --- [           main] trationdelegate$beanpostprocessorchecker : bean 'org.springframework.cloud.autoconfigure.configurationpropertiesrebinderautoconfiguration' of type [org.springframework.cloud.autoconfigure.configurationpropertiesrebinderautoconfiguration$$enhancerbyspringcglib$$dd8e22ae] is not eligible for getting processed by all beanpostprocessors (for example: not eligible for auto-proxying)

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: spring boot ::        (v2.2.6.release)

2020-05-11 09:51:09.479  info 6352 --- [           main] c.a.c.n.c.nacospropertysourcebuilder     : loading nacos data, dataid: 'demo', group: 'default_group', data: spring:
  profiles:
    active: dev

sharding:
  datasource:
    db0:
      driverclassname: com.mysql.cj.jdbc.driver
      jdbc-url: jdbc:mysql://106.13.181.6:3306/demo0
      username: root
      password: 123456
    db1:
      driverclassname: com.mysql.cj.jdbc.driver
      jdbc-url: jdbc:mysql://106.13.181.6:3306/demo1
      username: root
      password: 123456
2020-05-11 09:51:09.489  warn 6352 --- [           main] c.a.c.n.c.nacospropertysourcebuilder     : ignore the empty nacos configuration and get it based on dataid[demo.yml] & group[default_group]
2020-05-11 09:51:09.495  warn 6352 --- [           main] c.a.c.n.c.nacospropertysourcebuilder     : ignore the empty nacos configuration and get it based on dataid[demo-dev.yml] & group[default_group]
2020-05-11 09:51:09.495  info 6352 --- [           main] b.c.propertysourcebootstrapconfiguration : located property source: compositepropertysource {name='nacos', propertysources=[nacospropertysource {name='demo-dev.yml'}, nacospropertysource {name='demo.yml'}, nacospropertysource {name='demo'}]}
2020-05-11 09:51:09.499  info 6352 --- [           main] com.example.demo.demoapplication         : the following profiles are active: dev
2020-05-11 09:51:09.965  warn 6352 --- [           main] o.m.s.mapper.classpathmapperscanner      : skipping mapperfactorybean with name 'usermapper' and 'com.example.demo.mapper.usermapper' mapperinterface. bean already defined with the same name!
2020-05-11 09:51:09.965  warn 6352 --- [           main] o.m.s.mapper.classpathmapperscanner      : no mybatis mapper was found in '[com.example.demo.mapper]' package. please check your configuration.
2020-05-11 09:51:09.966  info 6352 --- [           main] o.s.c.a.configurationclasspostprocessor  : cannot enhance @configuration bean definition 'sqlsessionconfig' since its singleton instance has been created too early. the typical cause is a non-static @bean method with a beandefinitionregistrypostprocessor return type: consider declaring such methods as 'static'.
2020-05-11 09:51:09.989  info 6352 --- [           main] o.s.cloud.context.scope.genericscope     : beanfactory id=3955a554-148e-313a-91f9-d6a10f2dc8c3
2020-05-11 09:51:10.150  info 6352 --- [           main] trationdelegate$beanpostprocessorchecker : bean 'org.springframework.cloud.autoconfigure.configurationpropertiesrebinderautoconfiguration' of type [org.springframework.cloud.autoconfigure.configurationpropertiesrebinderautoconfiguration$$enhancerbyspringcglib$$dd8e22ae] is not eligible for getting processed by all beanpostprocessors (for example: not eligible for auto-proxying)
2020-05-11 09:51:10.380  info 6352 --- [           main] o.s.b.w.embedded.tomcat.tomcatwebserver  : tomcat initialized with port(s): 8080 (http)
2020-05-11 09:51:10.386  info 6352 --- [           main] o.a.coyote.http11.http11nioprotocol      : initializing protocolhandler ["http-nio-8080"]
2020-05-11 09:51:10.387  info 6352 --- [           main] o.apache.catalina.core.standardservice   : starting service [tomcat]
2020-05-11 09:51:10.387  info 6352 --- [           main] org.apache.catalina.core.standardengine  : starting servlet engine: [apache tomcat/9.0.33]
2020-05-11 09:51:10.507  info 6352 --- [           main] o.a.c.c.c.[tomcat].[localhost].[/]       : initializing spring embedded webapplicationcontext
2020-05-11 09:51:10.508  info 6352 --- [           main] o.s.web.context.contextloader            : root webapplicationcontext: initialization completed in 994 ms
2020-05-11 09:51:10.770  info 6352 --- [           main] com.zaxxer.hikari.hikaridatasource       : hikaripool-1 - starting...
2020-05-11 09:51:11.562  info 6352 --- [           main] com.zaxxer.hikari.hikaridatasource       : hikaripool-1 - start completed.
2020-05-11 09:51:11.570  info 6352 --- [           main] com.zaxxer.hikari.hikaridatasource       : hikaripool-2 - starting...
2020-05-11 09:51:12.226  info 6352 --- [           main] com.zaxxer.hikari.hikaridatasource       : hikaripool-2 - start completed.
 _ _   |_  _ _|_. ___ _ |    _ 
| | |\/|_)(_| | |_\  |_)||_|_\ 
     /               |         
                        3.3.1 
2020-05-11 09:51:12.876  warn 6352 --- [           main] c.n.c.sources.urlconfigurationsource     : no urls will be polled as dynamic configuration sources.
2020-05-11 09:51:12.877  info 6352 --- [           main] c.n.c.sources.urlconfigurationsource     : to enable urls as dynamic configuration sources, define system property archaius.configurationsource.additionalurls or make config.properties available on classpath.
2020-05-11 09:51:12.880  warn 6352 --- [           main] c.n.c.sources.urlconfigurationsource     : no urls will be polled as dynamic configuration sources.
2020-05-11 09:51:12.880  info 6352 --- [           main] c.n.c.sources.urlconfigurationsource     : to enable urls as dynamic configuration sources, define system property archaius.configurationsource.additionalurls or make config.properties available on classpath.
2020-05-11 09:51:13.019  info 6352 --- [           main] o.s.s.concurrent.threadpooltaskexecutor  : initializing executorservice 'applicationtaskexecutor'
2020-05-11 09:51:13.257  info 6352 --- [           main] o.s.s.c.threadpooltaskscheduler          : initializing executorservice
2020-05-11 09:51:13.477  info 6352 --- [           main] o.a.coyote.http11.http11nioprotocol      : starting protocolhandler ["http-nio-8080"]
2020-05-11 09:51:13.495  info 6352 --- [           main] o.s.b.w.embedded.tomcat.tomcatwebserver  : tomcat started on port(s): 8080 (http) with context path ''
2020-05-11 09:51:13.554  info 6352 --- [           main] c.a.c.n.registry.nacosserviceregistry    : nacos registry, default_group demo 10.118.37.75:8080 register finished
2020-05-11 09:51:13.621  info 6352 --- [           main] com.example.demo.demoapplication         : started demoapplication in 5.276 seconds (jvm running for 6.226)
2020-05-11 09:51:16.719  info 6352 --- [nio-8080-exec-2] o.a.c.c.c.[tomcat].[localhost].[/]       : initializing spring dispatcherservlet 'dispatcherservlet'
2020-05-11 09:51:16.720  info 6352 --- [nio-8080-exec-2] o.s.web.servlet.dispatcherservlet        : initializing servlet 'dispatcherservlet'
2020-05-11 09:51:16.730  info 6352 --- [nio-8080-exec-2] o.s.web.servlet.dispatcherservlet        : completed initialization in 10 ms
2020-05-11 09:51:16.792  info 6352 --- [nio-8080-exec-2] com.example.demo.config.logaspect        : 
 请求信息：
【请求地址】：/demo/create
【请求头】：content-type = application/json, user-agent = postmanruntime/7.24.0, accept = */*, postman-token = 25dbfb89-782d-45b2-bbb1-b41380c27af7, host = localhost:8080, accept-encoding = gzip, deflate, br, connection = keep-alive, content-length = 61
【请求方法】：string com.example.demo.controller.usercontroller.create(userdto)
【请求参数】：[userdto(id=123458, name=zhangsan, phone=17751033130, sex=1)]
2020-05-11 09:51:16.832 debug 6352 --- [nio-8080-exec-2] c.example.demo.mapper.usermapper.insert  : ==>  preparing: insert into user ( id, name, sex, phone, create_time, enable, version ) values ( ?, ?, ?, ?, ?, ?, ? ) 
2020-05-11 09:51:16.848 debug 6352 --- [nio-8080-exec-2] c.example.demo.mapper.usermapper.insert  : ==> parameters: 123458(long), zhangsan(string), man(string), 17751033130(string), 2020-05-11t09:51:16.797(localdatetime), true(boolean), 1(long)
2020-05-11 09:51:16.905  info 6352 --- [nio-8080-exec-2] shardingsphere-sql                       : rule type: sharding
2020-05-11 09:51:16.905  info 6352 --- [nio-8080-exec-2] shardingsphere-sql                       : logic sql: insert into user  ( id,
name,
sex,
phone,
create_time,
enable,
version )  values  ( ?,
?,
?,
?,
?,
?,
? )
2020-05-11 09:51:16.905  info 6352 --- [nio-8080-exec-2] shardingsphere-sql                       : sqlstatement: insertstatement(super=dmlstatement(super=io.shardingsphere.core.parsing.parser.sql.dml.insert.insertstatement@362afd05), columns=[column(name=id, tablename=user), column(name=name, tablename=user), column(name=sex, tablename=user), column(name=phone, tablename=user), column(name=create_time, tablename=user), column(name=enable, tablename=user), column(name=version, tablename=user)], generatedkeyconditions=[], insertvalues=insertvalues(insertvalues=[insertvalue(type=values, expression=( ?,
?,
?,
?,
?,
?,
? ), parameterscount=7)]), columnslistlastposition=71, generatekeycolumnindex=-1, insertvalueslistlastposition=105)
2020-05-11 09:51:16.905  info 6352 --- [nio-8080-exec-2] shardingsphere-sql                       : actual sql: db0 ::: insert into user0  ( id,
name,
sex,
phone,
create_time,
enable,
version )  values  ( ?,
?,
?,
?,
?,
?,
? ) ::: [[123458, zhangsan, man, 17751033130, 2020-05-11t09:51:16.797, true, 1]]
2020-05-11 09:51:17.132 debug 6352 --- [nio-8080-exec-2] c.example.demo.mapper.usermapper.insert  : <==    updates: 1
2020-05-11 09:51:17.135  info 6352 --- [nio-8080-exec-2] com.example.demo.config.logaspect        : 
 执行结果：
【响应结果】："ok"
【执行耗时】：343毫秒

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