Erstellen, Lesen und Speichern von Projekten mit Aspose.Tasks für Java

Mit ASSOSPE.Beaks for Java können Sie mit MCP -Projekten (Microsoft Project) (MPP/XML) arbeiten, ohne dass Microsoft Project installiert wird oder die Microsoft Office -Automatisierung verwendet. Eine leistungsstarke und flexible API, Aspose.Tasks, spart Ihnen Zeit und Mühe, indem Sie Ihnen die Tools geben, die Sie benötigen, um effiziente Code zum Manipulieren von Projektdateien zu schreiben.

Aspose.Tasks kann vorhandene Dateien öffnen, aber auch neue Dateien erstellen. In diesem Artikel wird erläutert, wie eine neue und leere Projektdatei aus einem Stream erstellt oder die Klasse Projekt verwendet wird.

Erstellen einer leeren Projektdatei

Die Projekt Klasse ist die Hauptklasse in Aspose. Die von dieser Klasse angebotene Save -Methode ermöglicht es, das Projekt mit einem einzelnen API -Aufruf an verschiedene Ausgabebeformate wie XML, MPP, PDF, HTML usw. zu rendern. Diese Methode akzeptiert einen Dateistrom- oder Dateinamen und einen der Werte, die vom SaveFileFormat -Aufzählungstyp bereitgestellt werden.

Derzeit bietet Aspose.Tasks für Java die Möglichkeit, nur XML -Projektdateien zu erstellen. Die folgenden Codezeilen erstellen eine einfache Projektdatei im XML -Format.

Die XML -Projektdatei kann im Microsoft -Projekt eröffnet werden:

1. Wählen Sie im Menü Datei aus Öffnen.
2. Wählen Sie das XML -Format (*.xml) aus den Dateitypen aus und durchsuchen Sie die Ausgabe -XML -Datei.
3. Wählen Sie im Menü project Projektinformationen aus.

Die Projektinformationen für die Ausgabe XML -Datei **

Erstellen Sie ein leeres Projekt mit Dateistream

Das folgende Codebeispiel zeigt, wie ein leeres Projekt mit einem Dateistrom mit Aspose.Tasks erstellt wird.

// For complete examples and data files, please go to https://github.com/aspose-tasks/Aspose.Tasks-for-Java
   // The path to the documents directory.
   String dataDir = Utils.getDataDir(CreateEmptyProjectFile.class);

   //Create a project instance
   Project newProject = new Project();

   newProject.save(dataDir + "Project1.xml", SaveFileFormat.XML);

   //Display result of conversion.
   System.out.println("Project file generated Successfully");

Reading a Project File

Aspose.Tasks for Java lets you open existing files and manipulate them as well as creating new files. This topic shows how a Project file can be read using the Project class’s constructor.

The Project class constructor accepts a valid FileInputStream object or path to MPP or XML document and returns a Project object which can be used to manipulate project data.

// For complete examples and data files, please go to https://github.com/aspose-tasks/Aspose.Tasks-for-Java
   try
   {
       FileInputStream prjStream = new FileInputStream(dataDir + "Project1.mpp");
       Project existingProject = new Project(prjStream);
       prjStream.close();
       
       System.out.println("Calendar : " + existingProject.get(Prj.NAME));
   }
   catch(Exception ex)
   {
       System.out.println(ex.getMessage());
   }

Reading Project Files as a Template

Project project = new Project("d:\\Project1.mpp");

Reading Project Data from Microsoft Project Database

Aspose.Tasks for Java API now allows to read Project data from the Microsoft Project database. The SqlConnectionStringBuilder and MspDbSettings classes can be used to accomplish this purpose providing connection string settings for connection to the database.

// The path to the documents directory.
      String dataDir = Utils.getDataDir(ReadingProjectDatafromMicrosoftProjectDatabase.class);
      
String url = "jdbc:sqlserver://";
String serverName = "192.168.56.2\\MSSQLSERVER";
String portNumber = "1433";
String databaseName = "ProjectServer_Published";
String userName = "sa";
String password = "***";
MspDbSettings settings = new MspDbSettings(url+serverName+":"+portNumber+";databaseName="+databaseName+
         ";user=" + userName + ";password=" + password, UUID.fromString("E6426C44-D6CB-4B9C-AF16-48910ACE0F54"));
 
addJDBCDriver(new File("c:\\Program Files (x86)\\Microsoft JDBC Driver 4.0 for SQL Server\\sqljdbc_4.0\\enu\\sqljdbc4.jar"));
 
Project project = new Project(settings);
project.save(dataDir + "Project1.xml", SaveFileFormat.XML);

private static void addJDBCDriver(File file) throws Exception
{
    Method method = URLClassLoader.class.getDeclaredMethod("addURL", new Class[]{URL.class});
    method.setAccessible(true);
    method.invoke(ClassLoader.getSystemClassLoader(), new Object[]{file.toURI().toURL()});
}

Reading Project Data from Microsoft Access Database (MPD)

public static void main(String[] args) throws IOException {
    // For complete examples and data files, please go to https://github.com/aspose-tasks/Aspose.Tasks-for-Java
    // The path to the documents directory.
    String dataDir = Utils.getDataDir(ReadingProjectDatafromMicrosoftProjectDatabase.class);
    
    MpdSettings settings = new MpdSettings(getConnectionString(), 1);
    Project project = new Project(settings);
    project.save(dataDir + "Project1.xml", SaveFileFormat.XML);
}
    
private static String getConnectionString()
{
    return "jdbc:odbc:DRIVER=Microsoft Access Driver (*.mdb, *.accdb);DBQ=" + "mpdFile.mpd";
}

Ignoring invalid characters during loading Project

Some files may have invalid characters in the custom fields. Microsoft Project does not allow invalid character so the files have been created or manipulated with automation or some other tools. If these be loaded using the API, they may lead to an exception. In order to ignore such invalid characters, the overloaded constructor of the Project class can be used with the delegate method ParseErrorCallBack.

public static void main(String[] args) throws IOException {
    // For complete examples and data files, please go to https://github.com/aspose-tasks/Aspose.Tasks-for-Java
    
    // The path to the documents directory.
    String dataDir = Utils.getDataDir(ReadingProjectDatafromMicrosoftProjectDatabase.class);
            
    InputStream stream = null;
    try
    {
        stream = new ByteArrayInputStream(getModifiedXml().getBytes("utf-8"));
    }
    catch (UnsupportedEncodingException e)
    {
        e.printStackTrace();
    }
 
    Project project = new Project(stream, new ParseErrorCallback()
    {
        public Object invoke(Object sender, ParseErrorArgs args)
        {
            return customDurationHandler(sender, args);
        }
    });
    project.save(dataDir + "Project1.xml", SaveFileFormat.XML);
}

private static String getModifiedXml()
{
    StringBuilder xml = new StringBuilder();
 
    BufferedReader reader;
    String line;
    try
    {
        reader = new BufferedReader(new InputStreamReader(new FileInputStream("NewProductDev.xml"), "UTF8"));
        while ((line = reader.readLine()) != null)
        {
            xml.append(line).append("\n");
        }
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
 
    return xml.toString().replaceAll("PT(\\d+)H(\\d+)M(\\d+)S", "**$1Hrs$2Mins$3Secs**");
}
 
private static Object customDurationHandler(Object sender, ParseErrorArgs args)
{
    System.err.print(String.format("Object field : %s; Invalid value : %s; ", args.getFieldName(), args.getInvalidValue()));
    String duration = args.getInvalidValue().replaceAll("[*]{2}(\\d+)Hrs(\\d+)Mins(\\d+)Secs[*]{2}", "PT$1H$2M$3S");
    double newValue = Duration.parseTimeSpan(duration)*0.001/60/60;
    System.err.println(String.format("New value : %s", duration));
    Project project = new Project();
    return project.getDuration(newValue, TimeUnitType.Hour);
}

Read Password Protected Projects (2003 Format)

This topic shows how to read password protected projects in 2003 format using Aspose.Tasks for Java.

The Project class exposes the Project() constructor which is capable of reading password protected files in 2003 format. Saving a password-protected file is not supported yet.

To read a password-protected project file:

1. Load a Microsoft Project file.
2. In the constructor, provide a password as the second argument to the constructor.

The following lines of code show how to achieve this using Java.

// For complete examples and data files, please go to https://github.com/aspose-tasks/Aspose.Tasks-for-Java
   // The path to the documents directory.
   String dataDir = Utils.getDataDir(ReadPasswordProtectedFiles.class);

   Project prj = new Project(dataDir + "PassProtected2003.mpp", "pass");

   //Display result of conversion.
   System.out.println("Process completed Successfully");

The following code example demonstrates how to check if the project file is password protected.

ProjectFileInfo info = Project.getProjectFileInfo(dataDir + "project.mpp");
System.out.println("Is file password protected?:" + info.isPasswordProtected());

Reading Project Online

The ProjectServerManager class provides the methods to retrieve projects from the specified Project Online account. The ProjectServerCredentials class shall be used to provide credentials that are used to connect to Project Online. Previously, Microsoft.SharePoint.Client.Runtime assembly was used to retrieve AuthToken but now Aspose.Tasks for Java provides an option to specify SiteUrl, username, and password to create a connection to Project Online.

The following lines of code show how to read the project online.

String sharepointDomainAddress = "https://contoso.sharepoint.com";
String userName = "[e-mail]";
String password = "MyPassword";

ProjectServerCredentials credentials = new ProjectServerCredentials(sharepointDomainAddress, userName, password);
ProjectServerManager reader = new ProjectServerManager(credentials);

for (ProjectInfo p : (Iterable<ProjectInfo>)reader.getProjectList())
{
    System.out.println("Project Name:" + p.getName());
    System.out.println("Project Created Date:" + p.getCreatedDate());
    System.out.println("Project Last Saved Date:" + p.getLastSavedDate());
}

for (ProjectInfo p : (Iterable<ProjectInfo>)reader.getProjectList())
{
    Project project = reader.getProject(p.getId());
    System.out.println("Project " + p.getName() + " loaded.");
    System.out.println("Resources count:" + project.getResources().size());
}