我在MySQL中有一個數據庫,我想以編程方式在FileMaker Pro中創建所有相同的表和字段.我可以使用JDBC自己完成此操作,但我希望已經有了可以執行此操作的庫.

我研究了來自Apache的DDLUtils,但無法弄清楚如何構建它(它在構建系統中使用Maven,嘗試構建時會出現致命錯誤).

解決方法:

我自己編寫了代碼,但事實證明并沒有那么難.這是為了生成MySQL模式.我尚未測試FileMaker,但應該非常相似.

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;

}

}

來源：https://www.icode9.com/content-2-497401.html

總結

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