druid:java代碼創建連接池

PropertiesDB 是一個讀取配置文件的類，也可以不用，每個參數直接用String代替。

public DataSource dataSource(PropertiesDB propertiesDB) {
    DruidDataSource dataSource = new DruidDataSource();
    dataSource.setUrl(propertiesDB.getUrl());
    dataSource.setDriverClassName(propertiesDB.getDriverClassName());
    dataSource.setUsername(propertiesDB.getUsername());
    dataSource.setPassword(propertiesDB.getPassword());
    if (StringUtils.isNotBlank(propertiesDB.getConnectionProperties())) {
      dataSource.setConnectionProperties(propertiesDB.getConnectionProperties());
    }
    dataSource.setInitialSize(propertiesDB.getInitialSize());
    dataSource.setMinIdle(propertiesDB.getMinIdle());
    dataSource.setMaxWait(propertiesDB.getMaxActive());
    dataSource.setMaxActive(propertiesDB.getMaxActive());
    dataSource.setTimeBetweenEvictionRunsMillis(propertiesDB.getTimeBetweenEvictionRunsMillis());
    dataSource.setMinEvictableIdleTimeMillis(propertiesDB.getMinEvictableIdleTimeMillis());
    dataSource.setTestWhileIdle(propertiesDB.getTestWhileIdle());
    if (StringUtils.isNotBlank(propertiesDB.getValidationQuery())) {
      dataSource.setValidationQuery(propertiesDB.getValidationQuery());
    }
    dataSource.setTestOnBorrow(propertiesDB.getTestOnBorrow());
    dataSource.setTestOnReturn(propertiesDB.getTestOnReturn());
    dataSource.setPoolPreparedStatements(propertiesDB.getPoolPreparedStatements());
    dataSource.setMaxPoolPreparedStatementPerConnectionSize(
        propertiesDB.getMaxPoolPreparedStatementPerConnectionSize());
    if (StringUtils.isNotBlank(propertiesDB.getFilters())) {
      try {
        dataSource.setFilters(propertiesDB.getFilters());
      } catch (SQLException e) {
        logger.error("初始化數據庫連接池發生異常:{}", e.toString());
      }
    }
    return dataSource;
  }