Java纯代码实现导出PDF功能
作者：Xiao5xiao122
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，本文就来和大家分享一下Java实现导出PDF的常用方法吧
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
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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