SpringBoot集成nacos动态刷新数据源的实现示例

public void setUrl(String jdbcUrl) {
    if (StringUtils.equals(this.jdbcUrl, jdbcUrl)) {
      return;
    }
    // 重写的时候，需要将这个判断注释掉，否则会报错
    // if (inited) {
    //   throw new UnsupportedOperationException();
    // }

    if (jdbcUrl != null) {
      jdbcUrl = jdbcUrl.trim();
    }

    this.jdbcUrl = jdbcUrl;

    // if (jdbcUrl.startsWith(ConfigFilter.URL_PREFIX)) {
    // this.filters.add(new ConfigFilter());
    // }
  }
  
  public void setUsername(String username) {
    if (StringUtils.equals(this.username, username)) {
      return;
    }
		// 重写的时候，需要将这个判断注释掉，否则会报错
    // if (inited) {
    //   throw new UnsupportedOperationException();
    // }

    this.username = username;
  }

package com.mp.demo.config;

import com.alibaba.druid.pool.DruidDataSource;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Slf4j
@Configuration
@RefreshScope
@Data
public class DruidConfiguration
{
  @Value("${spring.datasource.url}")
  private String dbUrl;

  @Value("${spring.datasource.username}")
  private String username;

  @Value("${spring.datasource.password}")
  private String password;

  @Value("${spring.datasource.driver-class-name}")
  private String driverClassName;

  @Bean
  @RefreshScope
  public DruidDataSource dataSource()
  {
    DruidDataSource datasource = new DruidDataSource();
    datasource.setUrl(this.dbUrl);
    datasource.setUsername(username);
    datasource.setPassword(password);
    datasource.setDriverClassName(driverClassName);
    return datasource;
  }
}

 @GetMapping("/refresh")
  public String refresh() throws SQLException
  {
    DruidDataSource master = SpringUtils.getBean("dataSource");
    master.setUrl(druidConfiguration.getDbUrl());
    master.setUsername(druidConfiguration.getUsername());
    master.setPassword(druidConfiguration.getPassword());
    master.setDriverClassName(druidConfiguration.getDriverClassName());
    master.restart();
    return userName + "<>" + jdbcUrl+"----------"+druidConfiguration.getDbUrl();
  }