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Converting Files

To convert project data between different formats you read the source data using an appropriate Reader class, the write the data using a Writer class which matches the format you want to convert to.

MPXJ can do a lot of the work for you, as the example below illustrates. The UniversalProjectReader will detect the type of schedule being read and handle it accordingly. The ProjectWriterUtility will use the extension of the output file to determine the type of file written.

The extensions recognised by the ProjectWriterUtility class are:

  • MPX
  • XML (writes an MSPDI file)
  • PMXML
  • PLANNER
  • JSON
  • SDEF
import net.sf.mpxj.ProjectFile;
import net.sf.mpxj.reader.UniversalProjectReader;
import net.sf.mpxj.writer.ProjectWriter;
import net.sf.mpxj.writer.ProjectWriterUtility;

...

UniversalProjectReader reader = new UniversalProjectReader();
ProjectFile projectFile = reader.read(inputFile);

ProjectWriter writer = ProjectWriterUtility.getProjectWriter(outputFile);
writer.write(projectFile, outputFile);

If you already know the file types you are converting between, you can use the specific Reader and Writer classes, as shown below.

import net.sf.mpxj.ProjectFile;
import net.sf.mpxj.reader.ProjectReader;
import net.sf.mpxj.writer.ProjectWriter;
import net.sf.mpxj.mpp.MPPReader;
import net.sf.mpxj.mpx.MPXWriter;
...

ProjectReader reader = new MPPReader();
ProjectFile projectFile = reader.read(inputFile);

ProjectWriter writer = new MPXWriter();
writer.write(projectFile, outputFile);