com.aspose.words

Example:

Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);

List list = doc.getLists().add(ListTemplate.NUMBER_DEFAULT);
builder.getListFormat().setList(list);

builder.writeln("Default numbered list item 1.");
builder.writeln("Default numbered list item 2.");
builder.getListFormat().listIndent();
builder.writeln("Default numbered list item 3.");
builder.getListFormat().removeNumbers();

list = doc.getLists().add(ListTemplate.OUTLINE_HEADINGS_LEGAL);
builder.getListFormat().setList(list);

builder.writeln("Outline legal heading list item 1.");
builder.writeln("Outline legal heading list item 2.");
builder.getListFormat().listIndent();
builder.writeln("Outline legal heading list item 3.");
builder.getListFormat().listIndent();
builder.writeln("Outline legal heading list item 4.");
builder.getListFormat().listIndent();
builder.writeln("Outline legal heading list item 5.");
builder.getListFormat().removeNumbers();

// When saving the document to HTML, we can pass a SaveOptions object
// to decide which HTML elements the document will use to represent lists.
// Setting the "ExportListLabels" property to "ExportListLabels.AsInlineText"
// will create lists by formatting spans.
// Setting the "ExportListLabels" property to "ExportListLabels.Auto" will use the <p> tag
// to build lists in cases when using the <ol> and <li> tags may cause loss of formatting.
// Setting the "ExportListLabels" property to "ExportListLabels.ByHtmlTags"
// will use <ol> and <li> tags to build all lists.
HtmlSaveOptions options = new HtmlSaveOptions();
{
    options.setExportListLabels(exportListLabels);
}

doc.save(getArtifactsDir() + "HtmlSaveOptions.List.html", options);
String outDocContents = FileUtils.readFileToString(new File(getArtifactsDir() + "HtmlSaveOptions.List.html"), StandardCharsets.UTF_8);

switch (exportListLabels) {
    case ExportListLabels.AS_INLINE_TEXT:
        Assert.assertTrue(outDocContents.contains(
                "<p style=\"margin-top:0pt; margin-left:72pt; margin-bottom:0pt; text-indent:-18pt; -aw-import:list-item; -aw-list-level-number:1; -aw-list-number-format:'%1.'; -aw-list-number-styles:'lowerLetter'; -aw-list-number-values:'1'; -aw-list-padding-sml:9.67pt\">" +
                        "<span style=\"-aw-import:ignore\">" +
                        "<span>a.</span>" +
                        "<span style=\"width:9.67pt; font:7pt 'Times New Roman'; display:inline-block; -aw-import:spaces\">&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0; </span>" +
                        "</span>" +
                        "<span>Default numbered list item 3.</span>" +
                        "</p>"));

        Assert.assertTrue(outDocContents.contains(
                "<p style=\"margin-top:0pt; margin-left:43.2pt; margin-bottom:0pt; text-indent:-43.2pt; -aw-import:list-item; -aw-list-level-number:3; -aw-list-number-format:'%0.%1.%2.%3'; -aw-list-number-styles:'decimal decimal decimal decimal'; -aw-list-number-values:'2 1 1 1'; -aw-list-padding-sml:10.2pt\">" +
                        "<span style=\"-aw-import:ignore\">" +
                        "<span>2.1.1.1</span>" +
                        "<span style=\"width:10.2pt; font:7pt 'Times New Roman'; display:inline-block; -aw-import:spaces\">&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0; </span>" +
                        "</span>" +
                        "<span>Outline legal heading list item 5.</span>" +
                        "</p>"));
        break;
    case ExportListLabels.AUTO:
        Assert.assertTrue(outDocContents.contains(
                "<ol type=\"a\" style=\"margin-right:0pt; margin-left:0pt; padding-left:0pt\">" +
                        "<li style=\"margin-left:31.33pt; padding-left:4.67pt\">" +
                        "<span>Default numbered list item 3.</span>" +
                        "</li>" +
                        "</ol>"));

        Assert.assertTrue(outDocContents.contains(
                "<p style=\"margin-top:0pt; margin-left:43.2pt; margin-bottom:0pt; text-indent:-43.2pt; -aw-import:list-item; -aw-list-level-number:3; " +
                        "-aw-list-number-format:'%0.%1.%2.%3'; -aw-list-number-styles:'decimal decimal decimal decimal'; " +
                        "-aw-list-number-values:'2 1 1 1'; -aw-list-padding-sml:10.2pt\">" +
                        "<span style=\"-aw-import:ignore\">" +
                        "<span>2.1.1.1</span>" +
                        "<span style=\"width:10.2pt; font:7pt 'Times New Roman'; display:inline-block; -aw-import:spaces\">&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0; </span>" +
                        "</span>" +
                        "<span>Outline legal heading list item 5.</span>" +
                        "</p>"));
        break;
    case ExportListLabels.BY_HTML_TAGS:
        Assert.assertTrue(outDocContents.contains(
                "<ol type=\"a\" style=\"margin-right:0pt; margin-left:0pt; padding-left:0pt\">" +
                        "<li style=\"margin-left:31.33pt; padding-left:4.67pt\">" +
                        "<span>Default numbered list item 3.</span>" +
                        "</li>" +
                        "</ol>"));

        Assert.assertTrue(outDocContents.contains(
                "<ol type=\"1\" class=\"awlist3\" style=\"margin-right:0pt; margin-left:0pt; padding-left:0pt\">" +
                        "<li style=\"margin-left:7.2pt; text-indent:-43.2pt; -aw-list-padding-sml:10.2pt\">" +
                        "<span style=\"width:10.2pt; font:7pt 'Times New Roman'; display:inline-block; -aw-import:ignore\">&#xa0;&#xa0;&#xa0;&#xa0;&#xa0;&#xa0; </span>" +
                        "<span>Outline legal heading list item 5.</span>" +
                        "</li>" +
                        "</ol>"));
        break;
}