银行对账单PDF一页拆分多页

• 一个页拆分多个页，按照流水

String bank = "{\n" +
                "\t\"bank\" : [\n" +
                "\t\t{\n" +
                "\t\t\t\"name\" : \"中国农业银行\",\n" +
                "\t\t\t\"tableWidth\" : 279,\n" +
                "\t\t\t\"split\" : 3\n" +
                "\t\t},\n" +
                "\t\t{\n" +
                "\t\t\t\"name\" : \"中国银行\",\n" +
                "\t\t\t\"tableWidth\" : 420,\n" +
                "\t\t\t\"split\" : 2\n" +
                "\t\t},\n" +
                "\t\t{\n" +
                "\t\t\t\"name\" : \"中国工商银行\",\n" +
                "\t\t\t\"tableWidth\" : 414,\n" +
                "\t\t\t\"split\" : 2\n" +
                "\t\t}\n" +
                "\t]\n" +
                "}\n";

JSONObject jsonObject = JSONObject.parseObject(bank);
List<JSONObject> jsonObjectList = (List<JSONObject>) JSONPath.read(bank, "$bank[?(@.name='中国工商银行')]");

String filename = jsonObjectList.get(0).getString("name");
Integer tableWidth = jsonObjectList.get(0).getInteger("tableWidth");
Integer split = jsonObjectList.get(0).getInteger("split");

try (InputStream resource = new FileInputStream(new File("c:\\" + filename + ".pdf"));
     OutputStream result = new FileOutputStream(new File("c:\\" + filename + "-split.pdf"))) {
    Abstract2DPdfPageSplittingTool tool = new Abstract2DPdfPageSplittingTool() {
        @Override
        protected Iterable<Rectangle> determineSplitRectangles(PdfReader reader, int page) {
            Rectangle targetSize = PageSize.A4;
            List<Rectangle> rectangles = new ArrayList<>();
            float pageHeight = targetSize.getHeight();
            float pageWidth = targetSize.getWidth();
            for (int i = 0; i < split; i++) {
                rectangles.add(new Rectangle(0, pageHeight, pageWidth, pageHeight - tableWidth));
                pageHeight = pageHeight - tableWidth;
            }
            return rectangles;
        }
    };
    tool.split(result, new PdfReader(resource));
}