SpringBoot加itext实现PDF导出

墨蓝 2023-10-18 17:31 49阅读 0赞

## 场景 ##

iText是一个能够快速产生PDF文件的java类库。iText的java类对于那些要产生包含文本，表格，图形的只读文档是很有用的。它的类库尤其与java Servlet有很好的给合。使用iText与PDF能够使你正确的控制Servlet的输出。

官网：

[The Leading PDF Library for Developers | iText][The Leading PDF Library for Developers _ iText]

Itext实现导出PDF常用方法说明

[Itext实现导出PDF常用方法说明\_BADAO\_LIUMANG\_QIZHI的博客-CSDN博客][Itext_PDF_BADAO_LIUMANG_QIZHI_-CSDN]

## 实现 ##

打开pom.xml导入项目依赖

<dependency>
                <groupId>com.itextpdf</groupId>
                <artifactId>itextpdf</artifactId>
                <version>5.2.0</version>
    </dependency>
    <dependency>
                <groupId>com.itextpdf</groupId>
                <artifactId>itext-asian</artifactId>
                <version>5.2.0</version>
    </dependency>

前端实现

打印按钮

<button id="printPdfBtn" class="btn btn-info " type="button"><i class="fa fa-trash-o"></i> pdf打印</button>

js中按钮的点击事件

$("#printPdfBtn").click(function () {
            var data = t.rows(['.selected']).data()[0];
            if(undefined===data){
                swal({
                    type: 'warning',
                    title: '提示:',
                    text: '请首先选择一行数据！',
                    confirmButtonColor: "#1ab394",
                })
            }else{
                exportPdf(data.id);
            }
        });

其中 var data = t.rows(\['.selected'\]).data()\[0\];  
是dataTables中获取选中行的id属性。

exportPdf(data.id)负责执行具体的导出PDF请求

先判断能不能执行导出，如果能导出则跳转Url并将参数id传递。

function  exportPdf(id){
            $.post("/wmsInOrder/isExport.do",{id:id}).done(function (res) {
                if(res.status){
                   if(res.data ==true){                  
     window.location.href="/wmsInOrder/exportPdf.html?orderId="+id;
                    }else{
                        Swal.fire(
                            '请选择已完成的单',
                            res.data,
                            'warning'
                        )
                    }
                }else{
                    Swal.fire(
                        '导出失败!',
                        res.data,
                        res.msg
                    )
                }
            }).fail(function (err) {
                Swal.fire(
                    '异常提示',
                    '执行导出操作失败',
                    'error'
                )
            });
        }

来到url="/wmsInOrder/exportPdf.html?orderId="+id所对应的后台。

@Description("pdf导出")
        @RequestMapping(value = "/exportPdf.html")
        public void excelPdf(long orderId,HttpServletRequest request, HttpServletResponse response) throws Exception {
            this.inOrderService.exportPdf(orderId, request, response);
        }

来到service层

void exportPdf(Long orderId, HttpServletRequest request, HttpServletResponse response) throws Exception ;

来到serviceImpl层

具体方法作用参照代码注解。

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 ##

点击按钮

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70][]

打开PDF

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 1][]

[The Leading PDF Library for Developers _ iText]: https://itextpdf.com/en
[Itext_PDF_BADAO_LIUMANG_QIZHI_-CSDN]: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/89476534
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20190423164433988.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk=,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20190423164508310.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk=,size_16,color_FFFFFF,t_70