如何在不使用Apache DDLUtils的情况下使用JDBC将模式从一个数据库复制到另一个数据库？

我在MySQL中有一个数据库，我想以编程方式在FileMaker Pro中创建所有相同的表和字段。 我可以使用JDBC自己做，但我希望已经有一个库可以做到这一点。

我查看了Apache的DDLUtils，但是我无法弄清楚如何构建它（它使用Maven构建系统，当我尝试构建它时会出现致命错误）。

Answer 1

我自己写了代码，结果并没那么难。 这是为了生成MySQL的模式; 我没有测试过FileMaker，但它应该非常相似。

package com.prosc.db; import java.sql.DatabaseMetaData; import java.sql.ResultSet; import java.sql.SQLException; import java.util.HashSet; import java.util.Set; import java.util.logging.Level; import java.util.logging.Logger; /** * Created by IntelliJ IDEA. User: jesse Date: 11/21/11 Time: 1:34 PM */ public abstract class SchemaGenerator { private static final Logger log = Logger.getLogger( SchemaGenerator.class.getName() ); public String createDatabaseSql( String databasename ) { return "CREATE DATABASE " + databasename; } /** This should return the String required to create a new table * @param tableName The name of the table in the source database. This is also used as the name of the table to generate. * @param metaData A JDBC metadata object from the source database (where the schema is being created from, not where it's being written to) * */ public String createTableSql( DatabaseMetaData metaData, String tableName ) throws SQLException { ResultSet columnsMetadata = metaData.getColumns( null, null, tableName, null ); Set pkNames = new HashSet(3); try { ResultSet pkResultSet = metaData.getPrimaryKeys( null, null, tableName ); while( pkResultSet.next() ) { pkNames.add( pkResultSet.getString( 4 ) ); } } catch( Exception e ) { log.log( Level.WARNING, "Could not determine primary keys; will need to be manually configured", e ); } StringBuffer sql = new StringBuffer(); sql.append( "CREATE TABLE " + tableName + " (" ); String delim = ""; while( columnsMetadata.next() ) { sql.append( delim ); delim = ", "; String columnName = columnsMetadata.getString( 4 ); String sqlTypename = columnsMetadata.getString(6); int typeCode = columnsMetadata.getInt( 5 ); String targetTypename = targetTypename( sqlTypename, typeCode ); if( targetTypename == null ) { log.info( "Unknown typename for type code " + typeCode + "; SQL type name is " + sqlTypename ); continue; } int columnSize = columnsMetadata.getInt( 7 ); boolean nullsProhibited = "NO".equalsIgnoreCase( columnsMetadata.getString(18) ); int precision = columnsMetadata.getInt( 9 ); appendFieldCreationClause( sql, columnName, targetTypename, columnSize, precision, nullsProhibited, pkNames.contains( columnName ), metaData.getIdentifierQuoteString(), columnsMetadata ); } sql.append( ")" ); return sql.toString(); } public void appendFieldCreationClause( StringBuffer buffer, String columnName, String targetTypename, int columnSize, int precision, boolean nullsProhibited, boolean isPrimaryKey, String identifierQuoteString, ResultSet columnMetaData ) { if( isPrimaryKey ) { targetTypename = "INT"; precision = 0; } buffer.append( identifierQuoteString + columnName + identifierQuoteString + " " + targetTypename ); if( columnSize > 0 ) { buffer.append( "(" + columnSize ); if( precision > 0 ) { buffer.append( "," + precision ); } buffer.append( ")" ); } if( "id".equalsIgnoreCase( columnName ) ) { buffer.append( " UNIQUE" ); } if( nullsProhibited ) { buffer.append( " NOT NULL" ); } if( isPrimaryKey ) { buffer.append( " AUTO_INCREMENT" ); buffer.append( " PRIMARY KEY" ); } } public String targetTypename( String sqlTypename, int typeCode ) { return sqlTypename; } }