文章目錄

• • • • • 一、改造多數(shù)據(jù)源
        • • 1. 依賴引入
          • 2. 啟動類添加注解
          • 3. 配置多數(shù)據(jù)源
        • 二、案例實戰(zhàn)
        • • 2.1. controller
          • 2.2. service
          • 2.3. impl
          • 2.4. mapper
          • 2.5. xml
        • 三、分頁失效解決方案

一、改造多數(shù)據(jù)源

1. 依賴引入

目前改用dynamic-datasource方式多數(shù)據(jù)源處理，配置如下圖：

<!--置動態(tài)數(shù)據(jù)源--><dependency><groupId>com.baomidou</groupId><artifactId>dynamic-datasource-spring-boot-starter</artifactId><version>3.4.1</version></dependency>

2. 啟動類添加注解

@SpringBootApplication(exclude = DruidDataSourceAutoConfigure.class)

3. 配置多數(shù)據(jù)源

########################################## 多數(shù)據(jù)源配置 ############################################ spring:datasource:dynamic:primary: master #設(shè)置默認(rèn)的數(shù)據(jù)源或者數(shù)據(jù)源組,默認(rèn)值即為masterstrict: false #嚴(yán)格匹配數(shù)據(jù)源,默認(rèn)false. true未匹配到指定數(shù)據(jù)源時拋異常,false使用默認(rèn)數(shù)據(jù)源datasource:master:url: jdbc:mysql://localhost:3306/dbmysql?autoReconnect=true&useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=CONVERT_TO_NULL&useSSL=false&serverTimezone=CTT&nullCatalogMeansCurrent=trueusername: rootpassword: 123456driver-class-name: com.mysql.cj.jdbc.Driver # 3.2.0開始支持SPI可省略此配置filters: wall,mergeStatoracle_1:driver-class-name: oracle.jdbc.OracleDriverurl: jdbc:oracle:thin:@192.168.xxx.xxx:1521:orclusername: orclpassword: orclfilters: wall,mergeStat

二、案例實戰(zhàn)

使用規(guī)范：只需要在持久層接口類上添加@DS(“oracle_1”) 注解，里面寫yml配置的數(shù)據(jù)庫別名即可

2.1. controller

/*** 英雄信息表控制器** @author gblfy* @Date 2021-08-13 11:19:00*/ @Controller @RequestMapping("/hero") public class HeroController extends BaseController {private String PREFIX = "/antifraud/hero";@Autowiredprivate HeroService heroService;/*** 查詢列表** @author gblfy* @Date 2021-08-13*/@ResponseBody@RequestMapping("/list")public LayuiPageInfo list(HeroParam heroParam) {return this.heroService.findPageBySpec(heroParam);}

2.2. service

/*** <p>* 英雄信息表 服務(wù)類* </p>** @author gblfy* @since 2021-08-13*/ public interface HeroService extends IService<Hero> {/*** 查詢分頁數(shù)據(jù)，Specification模式** @author gblfy* @Date 2021-08-13*/LayuiPageInfo findPageBySpec(HeroParam param);}

2.3. impl

@Service public class HeroServiceImpl extends ServiceImpl<HeroMapper, Hero> implements HeroService {@Autowiredprivate HeroMapper heroMapper;@Overridepublic LayuiPageInfo findPageBySpec(HeroParam param){Page pageContext = getPageContext();IPage page = heroMapper.customPageList(pageContext, param);return LayuiPageFactory.createPageInfo(page);}private Page getPageContext() {return LayuiPageFactory.defaultPage();}}

2.4. mapper

@DS("oracle_1") public interface HeroMapper extends BaseMapper<Hero> {/*** 獲取分頁實體列表** @author gblfy* @Date 2021-08-13*/Page<HeroResult> customPageList(@Param("page") Page page, @Param("paramCondition") HeroParam paramCondition);}

2.5. xml

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.gblfy.modular.order.mapper.HeroMapper"><!-- 通用查詢映射結(jié)果 --><resultMap id="BaseResultMap" type="com.gblfy.modular.order.entity.Hero"><id column="SNO" property="sno"/><result column="USER_NAME" property="userName"/><result column="AGE" property="age"/></resultMap><!-- 通用查詢結(jié)果列 --><sql id="Base_Column_List">SNOAS "sno", USER_NAME AS "userName", AGE AS "age"</sql><select id="customPageList" resultType="com.gblfy.modular.order.model.result.HeroResult"parameterType="com.gblfy.modular.order.model.request.HeroParam">select<include refid="Base_Column_List"/>from HERO where 1 = 1</select> </mapper>

三、分頁失效解決方案

現(xiàn)象：改造完多數(shù)據(jù)源之后，分頁插件就失效了。
方案：重新加載分頁插件

• 分頁插件
  MultiDataMyBatisPlusConfig

package com.gblfy.config.datasource;import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration;/*** @author gblfy* @date 2021-08-13*/ @Configuration public class MultiDataMyBatisPlusConfig {/*** 使用多數(shù)據(jù)源后分頁插件失效，攔截器重新調(diào)用分頁插件** @return*/@Beanpublic PaginationInterceptor paginationInterceptor() {return new PaginationInterceptor();} }

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