java实现Oracle语句转MySQL_JAVA自动操作0racle数据库转mysql数据库

可以使用Java编写一个程序，通过JDBC连接Oracle数据库，读取其中的表和数据，然后将其转换为MySQL语法，并通过JDBC连接MySQL数据库，将数据写入其中。

下面是一个简单的代码示例：

import java.sql.*;

public class OracleToMySQL {
    public static void main(String[] args) {
        String oracleUrl = "jdbc:oracle:thin:@localhost:1521:ORCL";
        String oracleUser = "username";
        String oraclePassword = "password";
        String mysqlUrl = "jdbc:mysql://localhost:3306/mysql";
        String mysqlUser = "root";
        String mysqlPassword = "password";

        try {
            // Connect to Oracle database
            Connection oracleConnection = DriverManager.getConnection(oracleUrl, oracleUser, oraclePassword);
            Statement oracleStatement = oracleConnection.createStatement();

            // Connect to MySQL database
            Connection mysqlConnection = DriverManager.getConnection(mysqlUrl, mysqlUser, mysqlPassword);
            Statement mysqlStatement = mysqlConnection.createStatement();

            // Read tables from Oracle
            ResultSet tables = oracleStatement.executeQuery("SELECT table_name FROM user_tables");
            while (tables.next()) {
                String tableName = tables.getString(1);

                // Read columns from Oracle
                ResultSet columns = oracleStatement.executeQuery("SELECT column_name, data_type FROM user_tab_columns WHERE table_name = '" + tableName + "'");
                StringBuilder createTableSql = new StringBuilder("CREATE TABLE " + tableName + " (");
                while (columns.next()) {
                    String columnName = columns.getString(1);
                    String dataType = columns.getString(2);
                    createTableSql.append(columnName + " " + dataType + ",");
                }
                createTableSql.setLength(createTableSql.length() - 1);
                createTableSql.append(")");
                mysqlStatement.execute(createTableSql.toString());

                // Read data from Oracle and insert into MySQL
                ResultSet data = oracleStatement.executeQuery("SELECT * FROM " + tableName);
                while (data.next()) {
                    StringBuilder insertSql = new StringBuilder("INSERT INTO " + tableName + " VALUES (");
                    ResultSetMetaData metaData = data.getMetaData();
                    for (int i = 1; i <= metaData.getColumnCount(); i++) {
                        String value = data.getString(i);
                        insertSql.append("'" + value + "',");
                    }
                    insertSql.setLength(insertSql.length() - 1);
                    insertSql.append(")");
                    mysqlStatement.execute(insertSql.toString());
                }
            }

            // Close connections
            mysqlStatement.close();
            mysqlConnection.close();
            oracleStatement.close();
            oracleConnection.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

需要注意的是，该代码仅供参考，实际应用中需要考虑更多的细节和异常情况。