java为什么在云服务器上，带有多行文本框结果的generatedwithPDFBox PDF表单看起来不同？

Question

我有一个web应用程序，可以使用PDF框填充PDF表单

        <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>pdfbox</artifactId>
            <version>2.0.24</version>
        </dependency>

我在多行文本字段中遇到空格字符问题

空表格可从以下网址获取：

https://www.taxdataexchange.org/pdf-template

填写的表格可在以下网址查看：

https://www.taxdataexchange.org/pdf-template-filled

这是我的代码：

package processors;

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDDocumentCatalog;
import org.apache.pdfbox.pdmodel.interactive.form.PDAcroForm;
import org.apache.pdfbox.pdmodel.interactive.form.PDField;

import utils.BytesToFile;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class TemplateFiller {

    public static final String LF = "\n";

    public TemplateFiller( ) {

    }

    public ByteArrayOutputStream fill( ) throws IOException {

        ClassLoader classLoader = TemplateFiller.class.getClassLoader( );
        String templateFilePath = "pdf/form.template.pdf";
        InputStream templateStream = classLoader.getResourceAsStream( templateFilePath );

        String singleLine = "Single line";
        StringBuilder stringBuilder = new StringBuilder( );
        for ( int i = 1; i < 16; i++ ) {
            stringBuilder.append( String.format( "This is line number %d.", i ) ).append( LF );
        }
        String multiLine = stringBuilder.toString( );

        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream( );

        try (
            PDDocument doc = PDDocument.load( templateStream )
        ) {

            PDDocumentCatalog pdDocCatalog = doc.getDocumentCatalog( );

            PDAcroForm acroForm = pdDocCatalog.getAcroForm( );

            // ===============================================
            // Fill in the AcroFields
            // ===============================================
            PDField field1 = acroForm.getField( "Title" );
            field1.setValue( singleLine );

            PDField field2 = acroForm.getField( "Contents" );
            field2.setValue( multiLine );

            doc.save( byteArrayOutputStream );

        }

        return byteArrayOutputStream;

    }

    public static void main( String[] args ) throws IOException {

        TemplateFiller templateFiller = new TemplateFiller( );

        BytesToFile.writeToDirFile(
            templateFiller.fill().toByteArray(),
            "/Users/xxxxxxxxx/Downloads",
            "filled.pdf"
        );

    }

}


@WebServlet( "/pdf-template-filled" )
public class PdfTemplateFilled extends BaseServlet {

    @Override
    protected void doGet(
        HttpServletRequest request,
        HttpServletResponse response
    ) throws IOException, ServletException {

        TemplateFiller templateFiller = new TemplateFiller( );
        ByteArrayOutputStream byteArrayOutputStream = templateFiller.fill( );

        byte[] pdfBytes = byteArrayOutputStream.toByteArray( );
        String fileName = "filled-form.pdf";
        downloadPdfFile( request, response, fileName, pdfBytes );

    }

}

谢谢你的帮助