Itext实现导出PDF常用方法说明

谁践踏了优雅 2023-10-18 17:31 9阅读 0赞

## 场景 ##

SpringBoot加itext实现PDF导出下载

[https://blog.csdn.net/BADAO\_LIUMANG\_QIZHI/article/details/89475877][https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_89475877]

## 实现 ##

1.设置响应格式

response.setContentType("application/pdf");
     response.setHeader("Expires", "0");
     response.setHeader("Cache-Control", "must-revalidate, post-check=0, pre-check=0");
     response.setHeader("Pragma", "public");

2.设置纸张规格并创建文档实例

//设置纸张规格为A4纸
    Rectangle rect = new Rectangle(PageSize.A4);
    //创建文档实例
    Document doc=new Document(rect);

3.添加中文字体

BaseFont bfChinese=BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);

4.设置字体样式

Font textFont = new Font(bfChinese,11, Font.NORMAL); //正常
    //Font redTextFont = new Font(bfChinese,11,Font.NORMAL,Color.RED); //正常,红色
    Font boldFont = new Font(bfChinese,11,Font.BOLD); //加粗
    //Font redBoldFont = new Font(bfChinese,11,Font.BOLD,Color.RED); //加粗,红色
    Font firsetTitleFont = new Font(bfChinese,22,Font.BOLD); //一级标题
    Font secondTitleFont = new Font(bfChinese,15,Font.BOLD, CMYKColor.BLUE); //二级标题
    Font underlineFont = new Font(bfChinese,11,Font.UNDERLINE); //下划线斜体

5.设置字体

com.itextpdf.text.Font FontChinese24 = new com.itextpdf.text.Font(bfChinese, 24, com.itextpdf.text.Font.BOLD);
            com.itextpdf.text.Font FontChinese18 = new com.itextpdf.text.Font(bfChinese, 18, com.itextpdf.text.Font.BOLD);
            com.itextpdf.text.Font FontChinese16 = new com.itextpdf.text.Font(bfChinese, 16, com.itextpdf.text.Font.BOLD);
            com.itextpdf.text.Font FontChinese12 = new com.itextpdf.text.Font(bfChinese, 12, com.itextpdf.text.Font.NORMAL);
            com.itextpdf.text.Font FontChinese11Bold = new com.itextpdf.text.Font(bfChinese, 11, com.itextpdf.text.Font.BOLD);
            com.itextpdf.text.Font FontChinese11 = new com.itextpdf.text.Font(bfChinese, 11, com.itextpdf.text.Font.ITALIC);
            com.itextpdf.text.Font FontChinese11Normal = new com.itextpdf.text.Font(bfChinese, 11, com.itextpdf.text.Font.NORMAL);

6.设置要到处PDF响应并设置导出PDF标题

String title = "霸道流氓气质";
            response.setHeader("Content-disposition","attachment; filename=".concat(String.valueOf(URLEncoder.encode(title + ".pdf", "UTF-8"))));

7.输出流转换

OutputStream out = response.getOutputStream();
    PdfWriter.getInstance(doc,out);
    doc.open();
    doc.newPage();

8.新建段落

Paragraph   p1 = new Paragraph("二级标题", secondTitleFont);

9.设置段落行高

p1.setLeading(0);

10.设置段落文本居中

p1.setAlignment(Element.ALIGN_CENTER);

11.将段落添加到文档上

doc.add(p1);

12.设置空行

Paragraph blankRow1 = new Paragraph(18f, " ", FontChinese11);
    doc.add(blankRow1);

13.新建表格列数为2

PdfPTable table1 = new PdfPTable(2);

14.给表格设置宽度

int width1[] = {80,60};
    table1.setWidths(width1);

15.新建单元格并赋值加设置字体

PdfPCell cell11 = new PdfPCell(new Paragraph("姓名：  "+name,boldFont));

16.设置单元格边框

cell11.setBorder(0);

17.表格中添加单元格

table1.addCell(cell11);

18.关闭文档

doc.close();

### 完整示例代码 ###

public void exportPdf(Long orderId, HttpServletRequest request, HttpServletResponse response) throws Exception {
            //设置响应格式等
            response.setContentType("application/pdf");
            response.setHeader("Expires", "0");
            response.setHeader("Cache-Control", "must-revalidate, post-check=0, pre-check=0");
            response.setHeader("Pragma", "public");
            Map<String,Object> map = new HashMap<>();
            //设置纸张规格为A4纸
            Rectangle rect = new Rectangle(PageSize.A4);
            //创建文档实例
            Document doc=new Document(rect);
            //添加中文字体
            BaseFont bfChinese=BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
            //设置字体样式
            Font textFont = new Font(bfChinese,11, Font.NORMAL); //正常
            //Font redTextFont = new Font(bfChinese,11,Font.NORMAL,Color.RED); //正常,红色
            Font boldFont = new Font(bfChinese,11,Font.BOLD); //加粗
            //Font redBoldFont = new Font(bfChinese,11,Font.BOLD,Color.RED); //加粗,红色
            Font firsetTitleFont = new Font(bfChinese,22,Font.BOLD); //一级标题
            Font secondTitleFont = new Font(bfChinese,15,Font.BOLD, CMYKColor.BLUE); //二级标题
            Font underlineFont = new Font(bfChinese,11,Font.UNDERLINE); //下划线斜体
            //设置字体
            com.itextpdf.text.Font FontChinese24 = new com.itextpdf.text.Font(bfChinese, 24, com.itextpdf.text.Font.BOLD);
            com.itextpdf.text.Font FontChinese18 = new com.itextpdf.text.Font(bfChinese, 18, com.itextpdf.text.Font.BOLD);
            com.itextpdf.text.Font FontChinese16 = new com.itextpdf.text.Font(bfChinese, 16, com.itextpdf.text.Font.BOLD);
            com.itextpdf.text.Font FontChinese12 = new com.itextpdf.text.Font(bfChinese, 12, com.itextpdf.text.Font.NORMAL);
            com.itextpdf.text.Font FontChinese11Bold = new com.itextpdf.text.Font(bfChinese, 11, com.itextpdf.text.Font.BOLD);
            com.itextpdf.text.Font FontChinese11 = new com.itextpdf.text.Font(bfChinese, 11, com.itextpdf.text.Font.ITALIC);
            com.itextpdf.text.Font FontChinese11Normal = new com.itextpdf.text.Font(bfChinese, 11, com.itextpdf.text.Font.NORMAL);
    
            //设置要导出的pdf的标题
            String title = "霸道流氓气质";
            response.setHeader("Content-disposition","attachment; filename=".concat(String.valueOf(URLEncoder.encode(title + ".pdf", "UTF-8"))));
            OutputStream out = response.getOutputStream();
            PdfWriter.getInstance(doc,out);
            doc.open();
            doc.newPage();
            //新建段落
            //使用二级标题 颜色为蓝色
            Paragraph   p1 = new Paragraph("二级标题", secondTitleFont);
            //设置行高
            p1.setLeading(0);
            //设置标题居中
            p1.setAlignment(Element.ALIGN_CENTER);
            //将段落添加到文档上
            doc.add(p1);
            //设置一个空的段落，行高为18  什么内容都不显示
            Paragraph blankRow1 = new Paragraph(18f, " ", FontChinese11);
            doc.add(blankRow1);
            //新建表格 列数为2
            PdfPTable table1 = new PdfPTable(2);
            //给表格设置宽度
            int width1[] = {80,60};
            table1.setWidths(width1);
            //新建单元格
            String name="霸道";
            String gender="男";
            //给单元格赋值 每个单元格为一个段落，每个段落的字体为加粗
            PdfPCell cell11 = new PdfPCell(new Paragraph("姓名：  "+name,boldFont));
            PdfPCell cell12 = new PdfPCell(new Paragraph("性别：  "+gender,boldFont));
            //设置单元格边框为0
            cell11.setBorder(0);
            cell12.setBorder(0);
            table1.addCell(cell11);
            table1.addCell(cell12);
            doc.add(table1);
            PdfPTable table3 = new PdfPTable(2);
            table3.setWidths(width1);
            PdfPCell cell15 = new PdfPCell(new Paragraph("博客主页： https://me.csdn.net/BADAO_LIUMANG_QIZHI  ",boldFont));
            PdfPCell cell16 = new PdfPCell(new Paragraph("当前时间：  "+DateConvert.formatDateToString(new Date(),DateStyle.YYYY_MM_DD),boldFont));
            cell15.setBorder(0);
            cell16.setBorder(0);
            table3.addCell(cell15);
            table3.addCell(cell16);
            doc.add(table3);
            doc.close();
        }

### 效果   ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70][] ###

[https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_89475877]: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/89475877
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20190423170723240.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk=,size_16,color_FFFFFF,t_70