在 Android Studio 中将 PDF 转换为 Word

Question

I want to convert my pdf file to word, i've search & found itext for reading pdf and apache poi for convert word, i have a problem how to use it:D hehe,

public class MainActivity extends AppCompatActivity {

TextView browsefile, filename;
ImageView gambar;
int RequestFile = 2;
Context mContext;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    browsefile = findViewById(R.id.browsefile);
    filename = findViewById(R.id.filename);
    gambar = findViewById(R.id.gambarfile);
    mContext = MainActivity.this;

    browsefile.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            startOptionBrowseFile();
        }
    });


}

private void startOptionBrowseFile() {
    Intent openFileIntent = new Intent(Intent.ACTION_GET_CONTENT);
    openFileIntent.setType("*/*");
    startActivityForResult(openFileIntent, RequestFile);

}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data){
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == RequestFile && resultCode == RESULT_OK && data != null){
        Uri selectedFile = data.getData();

        
        File path = new File(selectedFile.getPath());
        filename.setText(selectedFile.getPath());

        XWPFDocument doc = new XWPFDocument();
        String pdf = String.valueOf(path);
        PdfReader reader = null;
        try {
            reader = new PdfReader(pdf);
        } catch (IOException e) {
            e.printStackTrace();
        }
        PdfReaderContentParser parser = new PdfReaderContentParser(reader);

// Read the PDF page by page

        for (int i = 1; i <= reader.getNumberOfPages(); i++) {
            TextExtractionStrategy strategy = null;
            try {
                strategy = parser.processContent(i, new SimpleTextExtractionStrategy());
            } catch (IOException e) {
                e.printStackTrace();
            }
            // Extract the text
            String text=strategy.getResultantText();
            // Create a new paragraph in the word document, adding the extracted text
            XWPFParagraph p = doc.createParagraph();
            XWPFRun run = p.createRun();
            run.setText(text);
            // Adding a page break
            run.addBreak(BreakType.PAGE);
        }

// Write the word document

        FileOutputStream out = null;
        try {
            out = new FileOutputStream("myfile.docx");
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        try {
            doc.write(out);
        } catch (IOException e) {
            e.printStackTrace();
        }

// Close all open files

        try {
            out.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        reader.close();

    }
}


}

And this is the error

Can anyone help me?I am grateful if anyone can solve my problem

Answer 1

Solution

The interface Paragraph is not found in classpath. This failure happend in older POI versions because the WL and SL interfaces were inside scratchpad , which is not included in poi jar.

POI older than V4.1.2

When you are using an older version than 4.1.2 you must also add the poi-scrachpad library as dependency to your classpath / build.gradle

See https://mvnrepository.com/artifact/org.apache.poi/poi-scratchpad

Switch to POI V4.1.2

As you can see at https://github.com/apache/poi/commit/f2dba42227abb4edf0ba0313972762974585693f the WP and SL interfaces were moved by this commit on 28 May 2015 for release 4.1.2

So if you are using 4.1.2 you simple need just a dedicated POI library jar in classpath/build.gradle and the Paragraph interface must be found (see https://mvnrepository.com/artifact/org.apache.poi )

If this is still a problem, ensure you have added the POI library as an implementation dependency and not accidently only for test .

build.gradle example:

dependencies {
   // https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml
   compile group: 'org.apache.poi', name: 'poi-ooxml', version: '4.1.2'
}