content: package com.ruoyi.framework.config;
  
  import java.io.IOException;
  import java.util.HashMap;
  import java.util.Map;
  import javax.servlet.Filter;
  import javax.servlet.FilterChain;
  import javax.servlet.ServletException;
  import javax.servlet.ServletRequest;
  import javax.servlet.ServletResponse;
  import javax.sql.DataSource;
  import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
  import org.springframework.boot.context.properties.ConfigurationProperties;
  import org.springframework.boot.web.servlet.FilterRegistrationBean;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.context.annotation.Primary;
  import com.alibaba.druid.pool.DruidDataSource;
  import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder;
  import com.alibaba.druid.spring.boot.autoconfigure.properties.DruidStatProperties;
  import com.alibaba.druid.util.Utils;
  import com.ruoyi.common.enums.DataSourceType;
  import com.ruoyi.common.utils.spring.SpringUtils;
  import com.ruoyi.framework.config.properties.DruidProperties;
  import com.ruoyi.framework.datasource.DynamicDataSource;
  
  /**
   * druid 配置多数据源
   * 
   * @author ruoyi
   */
  @Configuration
  public class DruidConfig
  {
      @Bean
      @ConfigurationProperties("spring.datasource.druid.master")
      public DataSource masterDataSource(DruidProperties druidProperties)
      {
          DruidDataSource dataSource = DruidDataSourceBuilder.create().build();
          return druidProperties.dataSource(dataSource);
      }
  
      @Bean
      @ConfigurationProperties("spring.datasource.druid.slave")
      @ConditionalOnProperty(prefix = "spring.datasource.druid.slave", name = "enabled", havingValue = "true")
      public DataSource slaveDataSource(DruidProperties druidProperties)
      {
          DruidDataSource dataSource = DruidDataSourceBuilder.create().build();
          return druidProperties.dataSource(dataSource);
      }
  
      @Bean(name = "dynamicDataSource")
      @Primary
      public DynamicDataSource dataSource(DataSource masterDataSource)
      {
          Map<Object, Object> targetDataSources = new HashMap<>();
          targetDataSources.put(DataSourceType.MASTER.name(), masterDataSource);
          setDataSource(targetDataSources, DataSourceType.SLAVE.name(), "slaveDataSource");
          return new DynamicDataSource(masterDataSource, targetDataSources);
      }
  
      /**
       * 设置数据源
       * 
       * @param targetDataSources 备选数据源集合
       * @param sourceName 数据源名称
       * @param beanName bean名称
       */
      public void setDataSource(Map<Object, Object> targetDataSources, String sourceName, String beanName)
      {
          try
          {
              DataSource dataSource = SpringUtils.getBean(beanName);
              targetDataSources.put(sourceName, dataSource);
          }
          catch (Exception e)
          {
          }
      }
  
      /**
       * 去除监控页面底部的广告
       */
      @SuppressWarnings({ "rawtypes", "unchecked" })
      @Bean
      @ConditionalOnProperty(name = "spring.datasource.druid.statViewServlet.enabled", havingValue = "true")
      public FilterRegistrationBean removeDruidFilterRegistrationBean(DruidStatProperties properties)
      {
          // 获取web监控页面的参数
          DruidStatProperties.StatViewServlet config = properties.getStatViewServlet();
          // 提取common.js的配置路径
          String pattern = config.getUrlPattern() != null ? config.getUrlPattern() : "/druid/*";
          String commonJsPattern = pattern.replaceAll("\\*", "js/common.js");
          final String filePath = "support/http/resources/js/common.js";
          // 创建filter进行过滤
          Filter filter = new Filter()
          {
              @Override
              public void init(javax.servlet.FilterConfig filterConfig) throws ServletException
              {
              }
  
              @Override
              public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
                      throws IOException, ServletException
              {
                  chain.doFilter(request, response);
                  // 重置缓冲区，响应头不会被重置
                  response.resetBuffer();
                  // 获取common.js
                  String text = Utils.readFromResource(filePath);
                  // 正则替换banner, 除去底部的广告信息
                  text = text.replaceAll("<a.*?banner\"></a><br/>", "");
                  text = text.replaceAll("powered.*?shrek.wang</a>", "");
                  response.getWriter().write(text);
              }
  
              @Override
              public void destroy()
              {
              }
          };
          FilterRegistrationBean registrationBean = new FilterRegistrationBean();
          registrationBean.setFilter(filter);
          registrationBean.addUrlPatterns(commonJsPattern);
          return registrationBean;
      }
  }
  