package com.alibaba.druid.sql;

public class SQLUtils {
    public static String refactor(String sql, String dbType, Map<String, String> tableMapping);
}

import com.alibaba.druid.sql.SQLUtils;

Map<String, String> mapping = Collections.singletonMap("user", "user_01");

String sql = "select * from user";
String result = SQLUtils.refactor(sql, JdbcConstants.MYSQL, mapping);
assertEquals("SELECT *\n" +
                "FROM user_01", result);