开发经验总结： 读写分离简单实现

<dependency>
  <groupId>com.baomidou</groupId>
  <artifactId>dynamic-datasource-spring-boot-starter</artifactId>
  <version>${version}</version>
</dependency>

spring:
  datasource:
    dynamic:
      primary: master #设置默认的数据源或者数据源组,默认值即为master
      strict: false #严格匹配数据源,默认false. true未匹配到指定数据源时抛异常,false使用默认数据源
      datasource:
        master:
          url: jdbc:mysql://xx.xx.xx.xx:3306/dynamic
          username: root
          password: 123456
          driver-class-name: com.mysql.jdbc.Driver # 3.2.0开始支持SPI可省略此配置
        slave_1:
          url: jdbc:mysql://xx.xx.xx.xx:3307/dynamic
          username: root
          password: 123456
          driver-class-name: com.mysql.jdbc.Driver
        slave_2:
          url: ENC(xxxxx) # 内置加密,使用请查看详细文档
          username: ENC(xxxxx)
          password: ENC(xxxxx)
          driver-class-name: com.mysql.jdbc.Driver
       #......省略
       #以上会配置一个默认库master，一个组slave下有两个子库slave_1,slave_2

@Service
@DS("slave")
public class UserServiceImpl implements UserService {

  @Autowired
  private JdbcTemplate jdbcTemplate;

  public List selectAll() {
    return  jdbcTemplate.queryForList("select * from user");
  }

  @Override
  @DS("slave_1")
  public List selectByCondition() {
    return  jdbcTemplate.queryForList("select * from user where age >10");
  }
}

package com.pig4cloud.pigx.crm.controller;


import com.baomidou.dynamic.datasource.annotation.DS;
import com.pig4cloud.pigx.common.core.util.R;
import com.pig4cloud.pigx.common.security.annotation.Inner;
import com.pig4cloud.pigx.crm.mapper.AiAgentMapper;
import com.pig4cloud.pigx.crm.service.AiAgentService;
import io.swagger.v3.oas.annotations.security.SecurityRequirement;
import io.swagger.v3.oas.annotations.tags.Tag;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpHeaders;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;

@RestController
@RequiredArgsConstructor
@Tag(description = "test read write", name = "测试读写分离")
@SecurityRequirement(name = HttpHeaders.AUTHORIZATION)
@Valid
@Slf4j
public class TestDsController {

    private final AiAgentMapper aiAgentMapper;

    private final AiAgentService aiAgentService;

    @GetMapping("/testD")
    @ResponseBody
    //@Inner(value = false)
    public R testD() {
        return R.ok(aiAgentMapper.selectList(null));
    }


    @GetMapping("/testRead")
    @ResponseBody
    //@Inner(value = false)
    @DS("read")
    public R testRead() {
        return R.ok(aiAgentMapper.selectList(null));
    }

    @GetMapping("/testMaster")
    @ResponseBody
    //@Inner(value = false)
    @DS("master")
    public R testMaster() {
        return R.ok(aiAgentMapper.selectList(null));
    }

    @GetMapping("/testHe")
    @ResponseBody
    //@Inner(value = false)
    @DS("master")
    public R testHe() {
        return R.ok(aiAgentService.listTest());
    }

    @GetMapping("/testHe2")
    @ResponseBody
    //@Inner(value = false)
    @DS("read")
    public R testHe2() {
        return R.ok(aiAgentService.listTest2());
    }


    @GetMapping(value = "/testHe3",produces = "application/json")
    @ResponseBody
    //@Inner(value = false)
    public R testHe3() {
        Map<String, Object> dataMap = new HashMap<>();

        dataMap.put("read", aiAgentService.listTest());
        dataMap.put("master", aiAgentService.listTest2());

        return R.ok(dataMap);
    }


}

@Service
@Slf4j
@RequiredArgsConstructor
public class AiAgentServiceImpl extends ServiceImpl<AiAgentMapper, AiAgentEntity> implements AiAgentService {

    @Override
    @DS("read")
    public List<AiAgentEntity> listTest() {
        return baseMapper.selectList(null);
    }

    @Override
    @DS("master")
    public List<AiAgentEntity> listTest2() {
        return baseMapper.selectList(null);
    }
}