如何用hutool-db实现多数据源配置

今天给大家分享使用Hutool-db实现多数据源配置，大家一起来学习一下吧！

Hutool-db是一个在JDBC基础上封装的数据库操作工具类，通过包装，使用ActiveRecord思想操作数据库。在Hutool-db中，使用Entity（本质上是个Map）代替Bean来使数据库操作更加灵活，同时提供Bean和Entity的转换提供传统ORM的兼容支持。

            mysql
            mysql-connector-java
            5.1.45
        
        
            com.microsoft.sqlserver
            sqljdbc4
            4.0
        
        
            cn.hutool
            hutool-db
            5.7.22
        
        
            com.alibaba
            druid
            1.2.9
        

src/main/resources/config/db.setting

[mysql]
url = jdbc:mysql://127.0.0.1:3306/mydb?characterEncoding=utf-8&useSSL=false&serverTimezone=GMT
username = root
password = 123456
driver = com.mysql.jdbc.Driver
[sqlserver]
url = jdbc:sqlserver://192.168.33.4:1433;DatabaseName=DB
username = sa
password = 123456
driver = com.microsoft.sqlserver.jdbc.SQLServerDriver

/**
     * 测试mysql
     */
    private static void testMysql() {
        DataSource ds = DSFactory.get("mysql");
        Db.use(ds);
        Connection conn = null;
        try {
            conn = ds.getConnection();
            // 插入语句
            SqlExecutor.execute(conn, "insert into t_user (name,age) value ('小张',35)");
            // 更新语句
            SqlExecutor.execute(conn, "update t_user set name='小明002' where id=2 ");
            // 删除语句
            SqlExecutor.execute(conn, "delete from t_user  where id=2 ");
            List entityList = SqlExecutor.query(conn, "select * from t_user limit 50", new EntityListHandler());
            for (Entity entity : entityList) {
                System.out.println(entity.get("name"));
            }
        } catch (SQLException e) {
        } finally {
            DbUtil.close(conn);
        }
    }
    /**
     * 测试sqlserver
     */
    private static void testSqlServer() {
        DataSource ds = DSFactory.get("sqlserver");
        Connection conn = null;
        try {
            conn = ds.getConnection();
            List entityList = SqlExecutor.query(conn, "select * from t_user", new EntityListHandler());
            for (Entity entity : entityList) {
                System.out.println(entity.get("username"));
            }
        } catch (SQLException e) {
        } finally {
            DbUtil.close(conn);
        }
    }
    /**
     * 直接代码写jdbc数据源 不推荐的方式
     */
    private static void testDefineJdbc() {
        DruidDataSource ds = new DruidDataSource();
        ds.setUrl("jdbc:mysql://127.0.0.1:3306/mydb?characterEncoding=utf-8&useSSL=false&serverTimeznotallow=GMT");
        ds.setUsername("root");
        ds.setPassword("12345678");
        Connection conn = null;
        try {
            conn = ds.getConnection();
            List entityList = SqlExecutor.query(conn, "select * from t_user", new EntityListHandler());
            for (Entity entity : entityList) {
                System.out.println(entity.get("name"));
            }
        } catch (SQLException e) {
        } finally {
            DbUtil.close(conn);
        }
    }