Hämtar information om externa datakällor
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Ibland kanske du vill hämta information om externa datakällor. Du kanske till exempel vill se SQL-anslutningsdata. Denna information kan inkludera alla typer av data som krävs för att ansluta till en SQL-server, till exempel serverns URL, användarnamn, underliggande tabellnamn, SQL-fråga, frågetyp, platsen för tabellen, etc.
Aspose.Cells ger några användbara samtal för att hämta sådana detaljer från företagsdatabaser kopplade till Excel-mallfiler.
Hämtar information om externa datakällor
Följande exempel visar hur du får databasanslutning och andra detaljer. Exemplet använder en enkel Excel-fil som innehåller länkar till extern datakälla (SQL-server).
När koden körs skrivs anslutningsinformationen ut till konsolen.
SQL-anslutningsinformation
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// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-Java | |
// The path to the documents directory. | |
String dataDir = Utils.getDataDir(RetrievingExternalDataSourcesDetails.class); | |
// Open the template Excel file | |
Workbook workbook = new Workbook(dataDir + "connection.xlsx"); | |
// Get the external data connections | |
ExternalConnectionCollection connections = workbook.getDataConnections(); | |
// Get the count of the collection connection | |
int connectionCount = connections.getCount(); | |
// Create an external connection object | |
ExternalConnection connection = null; | |
// Loop through all the connections in the file | |
for (int i = 0; i < connectionCount; i++) { | |
connection = connections.get(i); | |
if (connection instanceof DBConnection) { | |
// Instantiate the DB Connection | |
DBConnection dbConn = (DBConnection) connection; | |
// Print the complete details of the object | |
System.out.println("Command: " + dbConn.getCommand()); | |
System.out.println("Command Type: " + dbConn.getCommandType()); | |
System.out.println("Description: " + dbConn.getConnectionDescription()); | |
System.out.println("Id: " + dbConn.getConnectionId()); | |
System.out.println("Info: " + dbConn.getConnectionInfo()); | |
System.out.println("Credentials: " + dbConn.getCredentials()); | |
System.out.println("Name: " + dbConn.getName()); | |
System.out.println("OdcFile: " + dbConn.getOdcFile()); | |
System.out.println("Source file: " + dbConn.getSourceFile()); | |
System.out.println("Type: " + dbConn.getType()); | |
// Get the parameters collection (if the connection object has) | |
ConnectionParameterCollection parameterCollection = dbConn.getParameters(); | |
// Loop through all the parameters and obtain the details | |
int paramCount = parameterCollection.getCount(); | |
for (int j = 0; j < paramCount; j++) { | |
ConnectionParameter param = parameterCollection.get(j); | |
System.out.println("Cell reference: " + param.getCellReference()); | |
System.out.println("Parameter name: " + param.getName()); | |
System.out.println("Prompt: " + param.getPrompt()); | |
System.out.println("SQL Type: " + param.getSqlType()); | |
System.out.println("Param Type: " + param.getType()); | |
System.out.println("Param Value: " + param.getValue()); | |
} | |
} | |
} |