java导出pdf（纯代码实现）

编程语言 2023-08-06 14:32:03 阅读次数: 0

java导出pdf
在项目开发中，产品的需求越来越奇葩啦，开始文件下载都是下载为excel的，做着做着需求竟然变了，要求能导出pdf。导出pdf倒也不是特别大的问题关键就是麻烦。
导出pdf我知道的一共有3中方法：
方法一：利用模板导出，但是首先编辑模板的工具不好找，现有的国外的工具要收费，所以放弃了这个。
方法二：利用HTML页面导出，奈何自己不会写HTML，前端忙没时间帮忙写。本着求人不如靠己的想法就选择了第三种比较麻烦的方法，自己用table画。
方法三：自己用纯代码画格式（可调字体大小，颜色，对复杂没有规则的数据都可以）
首先必须导入的依赖有

<!--导出pdf所需包-->
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itextpdf</artifactId>
            <version>5.5.10</version>
        </dependency>
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itext-asian</artifactId>
            <version>5.2.0</version>
        </dependency>

然后就是一顿代码输出
先把效果贴上
在这里插入图片描述
然后是代码部分

@ApiOperation(value = "导出")
    @PostMapping("/download")
    @SneakyThrows(Exception.class)
    public void download(@RequestBody @Valid FumigationDTO fumigationDTO, HttpServletResponse response, HttpServletRequest request) {
    
    
        // 防止日志记录获取session异常
        request.getSession();
        // 设置编码格式
        response.setContentType("application/pdf;charset=UTF-8");
        response.setCharacterEncoding("utf-8");
        String fileName = URLEncoder.encode("下载的PDF名称", "UTF-8");
        response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".pdf");
        fumigationService.download(fumigationDTO, response);
    }

业务层

@Override
    public void download(FumigationDTO fumigationDTO, HttpServletResponse response) throws IOException {
    
    
    	//要下载的数据查询数据部分我去掉了有需要自己根据业务取
        FumigationDowloadVO fumigationDowloadVO = new FumigationDowloadVO();
        

        // 定义全局的字体静态变量
        Font titlefont;
        Font headfont;
        Font keyfont = null;
        Font textfont = null;
        Font content = null;
        // 最大宽度
        try {
    
    
            // 不同字体（这里定义为同一种字体：包含不同字号、不同style）
            BaseFont bfChinese = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
            titlefont = new Font(bfChinese, 16, Font.BOLD);
            headfont = new Font(bfChinese, 14, Font.BOLD);
            keyfont = new Font(bfChinese, 10, Font.BOLD);
            textfont = new Font(bfChinese, 15, Font.NORMAL);
            content = new Font(bfChinese, 10, Font.NORMAL);

        } catch (Exception e) {
    
    
            e.printStackTrace();
        }
        BaseFont bf;
        Font font = null;
        try {
    
    
            //创建字体
            bf = BaseFont.createFont( "STSong-Light", "UniGB-UCS2-H",
                    BaseFont.NOT_EMBEDDED);
            //使用字体并给出颜色
            font = new Font(bf,20,Font.BOLD,BaseColor.BLACK);
        } catch (Exception e) {
    
    
            e.printStackTrace();
        }

        Document document = new Document(new RectangleReadOnly(842F, 595F));
        try {
    
    
            PdfWriter.getInstance(document,response.getOutputStream());
            //打开生成的pdf文件
            document.open();
            //设置内容
            Paragraph paragraph = new Paragraph("熏蒸备案回执",font);
            paragraph.setAlignment(1);
            //引用字体
            document.add(paragraph);

            // 设置表格的列宽和列数
            float[] widths = {
    
    25f,25f,25f,25f,25f,25f};
            PdfPTable table = new PdfPTable(widths);
            table.setSpacingBefore(20f);
            // 设置表格宽度为100%
            table.setWidthPercentage(100.0F);
            table.setHeaderRows(1);
            table.getDefaultCell().setHorizontalAlignment(1);
            PdfPCell cell = null;
            //第一行
            cell = new PdfPCell(new Paragraph("熏蒸备案编码",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            cell.setFixedHeight(30);
            table.addCell(cell);

            cell = new PdfPCell(new Paragraph(fumigationDowloadVO.getXzbm()));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table.addCell(cell);

            cell = new PdfPCell(new Paragraph("熏蒸备案时间",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table.addCell(cell);

            cell = new PdfPCell(new Paragraph(CheckVerifyUtil.dateToString4(fumigationDowloadVO.getSqxzrq())));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table.addCell(cell);

            cell = new PdfPCell(new Paragraph("申请备案单位",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table.addCell(cell);

            cell = new PdfPCell(new Paragraph(fumigationDowloadVO.getDwmc(),content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table.addCell(cell);
            //第二行
            cell = new PdfPCell(new Paragraph("熏蒸作业库点",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            cell.setFixedHeight(30);
            table.addCell(cell);

            cell = new PdfPCell(new Paragraph(fumigationDowloadVO.getKdmc(),content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table.addCell(cell);

            cell = new PdfPCell(new Paragraph("负责人",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table.addCell(cell);

            cell = new PdfPCell(new Paragraph(fumigationDowloadVO.getFzr(),content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table.addCell(cell);

            cell = new PdfPCell(new Paragraph("联系电话",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table.addCell(cell);

            cell = new PdfPCell(new Paragraph(fumigationDowloadVO.getFzrdh(),content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table.addCell(cell);
            //第三行
            cell = new PdfPCell(new Paragraph("单据状态",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            cell.setFixedHeight(30);
            table.addCell(cell);

            cell = new PdfPCell(new Paragraph(shzt(fumigationDowloadVO.getShzt()),content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table.addCell(cell);

            cell = new PdfPCell(new Paragraph("审核时间",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table.addCell(cell);

            cell = new PdfPCell(new Paragraph(CheckVerifyUtil.dateToString5(fumigationDowloadVO.getShsj()),content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table.addCell(cell);

            cell = new PdfPCell(new Paragraph(" ",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table.addCell(cell);

            cell = new PdfPCell(new Paragraph(" ",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table.addCell(cell);

            // 设置表格的列宽和列数
            float[] widths2 = {
    
    25f,25f,25f,25f,25f,25f};
            PdfPTable table2 = new PdfPTable(widths2);
            table2.setSpacingBefore(20f);
            // 设置表格宽度为100%
            table2.setWidthPercentage(100.0F);
            table2.setHeaderRows(1);
            table2.getDefaultCell().setHorizontalAlignment(1);

            //人员列表-第四行
            cell = new PdfPCell(new Paragraph("姓名",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            cell.setFixedHeight(20);
            table2.addCell(cell);

            cell = new PdfPCell(new Paragraph("职务",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table2.addCell(cell);

            cell = new PdfPCell(new Paragraph("职业资格",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table2.addCell(cell);

            cell = new PdfPCell(new Paragraph("身体状况",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table2.addCell(cell);

            cell = new PdfPCell(new Paragraph("熏蒸任务分工",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table2.addCell(cell);

            cell = new PdfPCell(new Paragraph("是否外包",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table2.addCell(cell);
            //人员列表数据-第五行
            if(fumigationDowloadVO.getProples().size() > 0){
    
    
                for (RecordFumigationPeople prople : fumigationDowloadVO.getProples()) {
    
    
                    PdfPCell cell1 = new PdfPCell(new Paragraph(prople.getXm(), content));
                    PdfPCell cell2 = new PdfPCell(new Paragraph(prople.getZw(), content));
                    PdfPCell cell3 = new PdfPCell(new Paragraph(prople.getZyzg(), content));
                    PdfPCell cell4 = new PdfPCell(new Paragraph(prople.getStzk(), content));
                    PdfPCell cell5 = new PdfPCell(new Paragraph(prople.getXzrwfg(), content));
                    PdfPCell cell6 = new PdfPCell(new Paragraph(prople.getSfwb(), content));

                    //单元格对齐方式
                    cell1.setHorizontalAlignment(Element.ALIGN_CENTER);
                    cell1.setVerticalAlignment(Element.ALIGN_MIDDLE);
                    cell1.setFixedHeight(20);
                    //单元格垂直对齐方式
                    cell2.setHorizontalAlignment(Element.ALIGN_CENTER);
                    cell2.setVerticalAlignment(Element.ALIGN_MIDDLE);

                    cell3.setHorizontalAlignment(Element.ALIGN_CENTER);
                    cell3.setVerticalAlignment(Element.ALIGN_MIDDLE);

                    cell4.setHorizontalAlignment(Element.ALIGN_CENTER);
                    cell4.setVerticalAlignment(Element.ALIGN_MIDDLE);

                    cell5.setHorizontalAlignment(Element.ALIGN_CENTER);
                    cell5.setVerticalAlignment(Element.ALIGN_MIDDLE);

                    cell6.setHorizontalAlignment(Element.ALIGN_CENTER);
                    cell6.setVerticalAlignment(Element.ALIGN_MIDDLE);

                    table2.addCell(cell1);
                    table2.addCell(cell2);
                    table2.addCell(cell3);
                    table2.addCell(cell4);
                    table2.addCell(cell5);
                    table2.addCell(cell6);
                }
            }

            // 设置表格的列宽和列数
            float[] widths3 = {
    
    25f,25f,25f,25f,25f};
            PdfPTable table3 = new PdfPTable(widths3);
            table3.setSpacingBefore(20f);
            // 设置表格宽度为100%
            table3.setWidthPercentage(100.0F);
            table3.setHeaderRows(1);
            table3.getDefaultCell().setHorizontalAlignment(1);

            //实施储粮信息
            cell = new PdfPCell(new Paragraph("仓房",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            cell.setFixedHeight(20);
            table3.addCell(cell);

            cell = new PdfPCell(new Paragraph("货位",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table3.addCell(cell);

            cell = new PdfPCell(new Paragraph("粮食品种",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table3.addCell(cell);

            cell = new PdfPCell(new Paragraph("计划熏蒸开始时间",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table3.addCell(cell);

            cell = new PdfPCell(new Paragraph("计划熏蒸结束时间",content));
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            table3.addCell(cell);

            if(fumigationDowloadVO.getDtls().size() > 0){
    
    
                for (RecordFumigationDtlVO dtl : fumigationDowloadVO.getDtls()) {
    
    
                    PdfPCell cell1 = new PdfPCell(new Paragraph(dtl.getCfmc(), content));
                    PdfPCell cell2 = new PdfPCell(new Paragraph(dtl.getHwmc(), content));
                    PdfPCell cell3 = new PdfPCell(new Paragraph(dtl.getLspzmc(), content));
                    PdfPCell cell4 = new PdfPCell(new Paragraph(CheckVerifyUtil.dateToString4(dtl.getJhxzksrq()), content));
                    PdfPCell cell5 = new PdfPCell(new Paragraph(CheckVerifyUtil.dateToString4(dtl.getJhxzjsrq()), content));
                    //设置居中
                    cell1.setHorizontalAlignment(Element.ALIGN_CENTER);
                    cell1.setVerticalAlignment(Element.ALIGN_MIDDLE);
                    cell1.setFixedHeight(20);

                    cell2.setHorizontalAlignment(Element.ALIGN_CENTER);
                    cell2.setVerticalAlignment(Element.ALIGN_MIDDLE);

                    cell3.setHorizontalAlignment(Element.ALIGN_CENTER);
                    cell3.setVerticalAlignment(Element.ALIGN_MIDDLE);

                    cell4.setHorizontalAlignment(Element.ALIGN_CENTER);
                    cell4.setVerticalAlignment(Element.ALIGN_MIDDLE);

                    cell5.setHorizontalAlignment(Element.ALIGN_CENTER);
                    cell5.setVerticalAlignment(Element.ALIGN_MIDDLE);

                    table3.addCell(cell1);
                    table3.addCell(cell2);
                    table3.addCell(cell3);
                    table3.addCell(cell4);
                    table3.addCell(cell5);

                }
            }

            document.add(new Paragraph("\n"));
            document.add(new Paragraph("▋ 基本信息",content));
            document.add(new Paragraph("\n"));

            document.add(table);

            document.add(new Paragraph("\n"));
            document.add(new Paragraph("▋ 基本信息",content));
            document.add(new Paragraph("\n"));

            document.add(table2);

            document.add(new Paragraph("\n"));
            document.add(new Paragraph("▋ 熏蒸作业储粮粮情",content));
            document.add(new Paragraph("\n"));

            document.add(table3);
			//关闭文档
            document.close();


        } catch (DocumentException e) {
    
    
            e.printStackTrace();
            log.error("导出pdf失败:{}",e);
        }
    }

然后就可以了直接导出pdf。

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