| | |
| | | package com.lunhan.xxx.host; |
| | | |
| | | import com.lunhan.xxx.common.util.ListUtil; |
| | | import com.lunhan.xxx.common.util.SerializeUtil; |
| | | |
| | | import java.sql.Connection; |
| | | import java.sql.DriverManager; |
| | | import java.sql.SQLException; |
| | | import java.util.List; |
| | | import java.util.Map; |
| | | import java.util.Objects; |
| | | |
| | | public class Mysql2Gauss { |
| | | private static final String Mysql_DB = "water_basic"; |
| | | private static final String Gauss_DB = "water_basic"; |
| | | public static void main(String[] args) { |
| | | private static final String FROM_HOST = "113.250.189.120"; |
| | | private static final String FROM_PORT = "23306"; |
| | | private static final String FROM_USER = "lunhan"; |
| | | private static final String FROM_PASSWORD = "lunhan123"; |
| | | private static final String FROM_DB_NAME = "water_basic"; |
| | | private static final String FROM_DRIVER = "com.mysql.cj.jdbc.Driver"; |
| | | private static final String FROM_CONNECTION_STR = "jdbc:mysql://" + FROM_HOST + ":" + FROM_PORT + "/" + FROM_DB_NAME + "?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8&useSSL=false"; |
| | | |
| | | private static final String TO_HOST = "113.250.189.120"; |
| | | private static final String TO_PORT = "57654"; |
| | | private static final String TO_USER = "lunhan"; |
| | | private static final String TO_PASSWORD = "lunhan.20240330"; |
| | | private static final String TO_DB_NAME = "water_basic"; |
| | | private static final String TO_DRIVER = "org.postgresql.Driver"; |
| | | private static final String TO_CONNECTION_STR = "jdbc:postgresql://" + TO_HOST + ":" + TO_PORT + "/" + TO_DB_NAME; |
| | | |
| | | private static Connection CONN_FROM = null; |
| | | private static Connection CONN_TO = null; |
| | | |
| | | static { |
| | | //加载驱动 |
| | | try { |
| | | Class.forName(FROM_DRIVER); |
| | | } catch (ClassNotFoundException e) { |
| | | e.printStackTrace(); |
| | | } |
| | | //获得连接 |
| | | try { |
| | | CONN_FROM = DriverManager.getConnection(FROM_CONNECTION_STR, FROM_USER, FROM_PASSWORD); |
| | | } catch (SQLException e) { |
| | | e.printStackTrace(); |
| | | } |
| | | //加载驱动 |
| | | try { |
| | | Class.forName(TO_DRIVER); |
| | | } catch (ClassNotFoundException e) { |
| | | e.printStackTrace(); |
| | | } |
| | | //获得连接 |
| | | try { |
| | | CONN_TO = DriverManager.getConnection(TO_CONNECTION_STR, TO_USER, TO_PASSWORD); |
| | | } catch (SQLException e) { |
| | | e.printStackTrace(); |
| | | } |
| | | } |
| | | |
| | | public static void main(String[] args) throws SQLException { |
| | | // 创建触发器需要的函数 |
| | | GenCodeGauss.execSql(CONN_TO, "CREATE OR REPLACE FUNCTION \"public\".\"update_timestamp_column\"()\n" + |
| | | " RETURNS \"pg_catalog\".\"trigger\" AS $BODY$\n" + |
| | | "BEGIN\n" + |
| | | "NEW.update_time := current_timestamp;\n" + |
| | | "RETURN NEW;\n" + |
| | | "END;\n" + |
| | | "$BODY$\n" + |
| | | " LANGUAGE plpgsql VOLATILE\n" + |
| | | " COST 100"); |
| | | |
| | | // 获取mysql所有的表名称 |
| | | Map<String, String> tables = GenCodeMysql.getTables(Mysql_DB); |
| | | Map<String, String> tables = GenCodeMysql.getTables(CONN_FROM, FROM_DB_NAME); |
| | | // 遍历表名,获取表结构 |
| | | for (Map.Entry<String, String> table : tables.entrySet()) { |
| | | // 获取mysql表结构 |
| | | List<Map<String, Object>> columns = GenCodeMysql.getColumns(table.getKey(), Mysql_DB); |
| | | List<Map<String, Object>> columns = GenCodeMysql.getColumns(CONN_FROM, table.getKey(), FROM_DB_NAME); |
| | | // 获取mysql表的主键 |
| | | Map<String, String> mapPK = GenCodeMysql.getPK(table.getKey()); |
| | | Map<String, String> mapPK = GenCodeMysql.getPK(CONN_FROM, table.getKey()); |
| | | // 获取mysql表的索引 |
| | | Map<String, String> mapIndex = GenCodeMysql.getIndex(table.getKey()); |
| | | Map<String, String> mapIndex = GenCodeMysql.getIndex(CONN_FROM, table.getKey()); |
| | | |
| | | System.out.println("从mysql查询表结构:" + table.getKey()); |
| | | // 调用gauss创建表结构 |
| | | boolean genTale = GenCodeGauss.genTable(table.getKey(), table.getValue(), columns, mapPK, mapIndex); |
| | | System.out.println("向gauss数据库创建表结果:" + genTale); |
| | | List<String> listGenTable = GenCodeGauss.genTable(table.getKey(), table.getValue(), columns, mapPK, mapIndex); |
| | | for (String sql : listGenTable) { |
| | | boolean result = GenCodeGauss.execSql(CONN_TO, sql); |
| | | System.out.println(sql + ", 执行结果:" + result); |
| | | } |
| | | |
| | | // 获取mysql表所有数据 |
| | | String sqlSelect = "SELECT * FROM " + Mysql_DB + "." + table.getKey(); |
| | | String sqlSelect = "SELECT * FROM " + FROM_DB_NAME + "." + table.getKey(); |
| | | Integer count = 1; |
| | | Integer pageSize = 500; |
| | | String orderBy = "id"; |
| | |
| | | while (count > 0) { |
| | | count = 0; |
| | | String sql = sqlSelect + (Objects.isNull(lastId) ? "" : " WHERE " + orderBy + " > " + GenCodeGauss.toDBValue(lastId) + "") + " ORDER BY " + orderBy + " LIMIT " + pageSize; |
| | | List<Map<String, Object>> list = GenCodeMysql.getListAll(sql); |
| | | List<Map<String, Object>> list = GenCodeMysql.getListAll(CONN_FROM, sql); |
| | | if (ListUtil.isNullOrEmpty(list)) { |
| | | continue; |
| | | } |
| | |
| | | |
| | | System.out.println("从mysql获取到数据:" + count); |
| | | // 批量插入gauss数据库 |
| | | List<Boolean> insertAll = GenCodeGauss.insertAll(list, table.getKey(), pageSize); |
| | | System.out.println("向gauss数据库插入数据结果:" + SerializeUtil.toJson(insertAll)); |
| | | List<String> insertAll = GenCodeGauss.insertAll(list, table.getKey(), pageSize); |
| | | for (String addData : insertAll) { |
| | | boolean result = GenCodeGauss.execSql(CONN_TO, addData); |
| | | System.out.println(addData + ", 执行结果:" + result); |
| | | } |
| | | } |
| | | } |
| | | } |