Java使用IText PDF 导出报表

//报表的导出

<!-- pom.xml的配置 itext 报表制作 pdf -->
<dependency>
    <groupId>com.lowagie</groupId>
    <artifactId>itext</artifactId>
    <version>4.2.1</version>
</dependency>
<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itext-asian</artifactId>
    <version>5.2.0</version>
</dependency>

<!-- 记得导出jar包 -->
public String exprotData(){
        // 工作单数据
        List<Region> list =   facedService.getRegionService().pageQueryByRedis(getSpecification());
        // pdf 下载...
        // itext 报表 下载
        try {
            Document document = new Document();
            // response
            HttpServletResponse response = ServletActionContext.getResponse();
            PdfWriter writer = PdfWriter.getInstance(document, response.getOutputStream());
            writer.setEncryption("itcast".getBytes(), "tangjiejin".getBytes(), PdfWriter.ALLOW_SCREENREADERS, PdfWriter.STANDARD_ENCRYPTION_128);
            // 浏览器下载 ...两个头
            String filename = new Date(System.currentTimeMillis()).toLocaleString() + "_区域报表.pdf";
            response.setContentType(ServletActionContext.getServletContext().getMimeType(filename));// mime 类型
            response.setHeader("Content-Disposition", "attachment;filename=" + DownLoadUtils.getAttachmentFileName(filename, ServletActionContext.getRequest().getHeader("user-agent")));
            // 打开文档
            document.open();
            Table table = new Table(5, list.size() + 1);// 5列 行号 0 开始
            table.setBorderWidth(1f);
            table.setAlignment(1);// // 其中1为居中对齐，2为右对齐，3为左对齐
            // table.setBorder(1); // 边框
            table.getDefaultCell().setHorizontalAlignment(Element.ALIGN_CENTER); // 水平对齐方式
            table.getDefaultCell().setVerticalAlignment(Element.ALIGN_TOP); // 垂直对齐方式
            // 设置表格字体
            BaseFont cn = BaseFont.createFont("STSongStd-Light", "UniGB-UCS2-H", false);
            Font font = new Font(cn, 10, Font.NORMAL, Color.BLUE);

            // 表头
            // table.addCell(buildCell("工作单编号", font));
            table.addCell(buildCell("省", font));
            table.addCell(buildCell("市", font));
            table.addCell(buildCell("区", font));
            table.addCell(buildCell("邮编", font));

            // 表格数据
            for (Region r : list) {
                // table.addCell(buildCell(workOrderManage.getId(), font));
                table.addCell(buildCell(r.getProvince(), font));
                table.addCell(buildCell(r.getCity(), font));
                table.addCell(buildCell(r.getDistrict(), font));
                table.addCell(buildCell(r.getPostcode(), font));
            }

            // 向文档添加表格
            document.add(table);
            document.close();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return NONE;
    }

    private Cell buildCell(String content, Font font) throws BadElementException {
        Phrase phrase = new Phrase(content, font);
        Cell cell = new Cell(phrase);
        // 设置垂直居中
        cell.setVerticalAlignment(1);
        // 设置水平居中
        cell.setHorizontalAlignment(1);
        return cell;
    }