springboot项目：导出pdf文件

╰+攻爆jí腚メ 2023-06-14 14:53 27阅读 0赞

*  上一篇文章，我们说了一个生成pdf，这次我们再web项目中导出pdf文件

#### 1、导入依赖 ####

<dependency>
                <groupId>com.lowagie</groupId>
                <artifactId>itext</artifactId>
                <version>2.1.7</version>
            </dependency>
    
    
            <dependency>
                <groupId>com.itextpdf</groupId>
                <artifactId>itextpdf</artifactId>
                <version>5.5.13</version>
            </dependency>
            
            <dependency>
                <groupId>com.itextpdf</groupId>
                <artifactId>itext-asian</artifactId>
                <version>5.2.0</version>
            </dependency>

#### 2、实体类 ####

package com.example.demo.entity;
    
    import lombok.Data;
    
    /** * @ClassName Product * @Description * @Author 戴书博 * @Date 2019/11/19 22:51 * @Version 1.0 **/
    @Data
    public class Product { 
    
        private String productName;
    
        private String productCode;
    
        private float price;
    
        public Product(String productName,String productCode,float price){ 
            this.productName = productName;
            this.productCode = productCode;
            this.price = price;
        }
    }

#### 3、controller ####

package com.example.demo.controller;
    
    import com.example.demo.entity.Product;
    import com.example.demo.entity.ViewPDF;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.servlet.ModelAndView;
    
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    /** * @ClassName PrintPdfController * @Description * @Author 戴书博 * @Date 2019/11/19 22:52 * @Version 1.0 **/
    @Controller
    @RequestMapping("/")
    public class PrintPdfController { 
    
        @RequestMapping("printPdf")
        public ModelAndView printPdf(){ 
            Product product1 = new Product("产品一","cp01",120);
            Product product2 = new Product("产品一","cp01",120);
            Product product3 = new Product("产品一","cp01",120);
            List<Product> products = new ArrayList<>();
            products.add(product1);
            products.add(product2);
            products.add(product3);
            Map<String, Object> model = new HashMap<>();
            model.put("sheet", products);
            return new ModelAndView(new ViewPDF(), model);
        }
    }

### 4、工具类 ###

package com.example.demo.util;
    
    import com.example.demo.entity.Product;
    import com.lowagie.text.Document;
    import com.lowagie.text.DocumentException;
    import com.lowagie.text.Font;
    import com.lowagie.text.Phrase;
    import com.lowagie.text.pdf.BaseFont;
    import com.lowagie.text.pdf.PdfPCell;
    import com.lowagie.text.pdf.PdfPTable;
    import com.lowagie.text.pdf.PdfWriter;
    
    import java.io.FileNotFoundException;
    import java.io.IOException;
    import java.util.List;
    
    /** * @ClassName PdfUtil * @Description * @Author 戴书博 * @Date 2019/11/19 23:09 * @Version 1.0 **/
    public class PdfUtil { 
    
        public void createPDF(Document document, PdfWriter writer, List<Product> products) throws IOException { 
            //Document document = new Document(PageSize.A4);
            try { 
                document.addTitle("sheet of product");
                document.addAuthor("scurry");
                document.addSubject("product sheet.");
                document.addKeywords("product.");
                document.open();
                PdfPTable table = createTable(writer,products);
                document.add(table);
            } catch (FileNotFoundException e) { 
                e.printStackTrace();
            } catch (DocumentException e) { 
                e.printStackTrace();
            } finally { 
                document.close();
            }
        }
        public static PdfPTable createTable(PdfWriter writer,List<Product> products) throws IOException, DocumentException { 
            PdfPTable table = new PdfPTable(3);//生成一个两列的表格
            PdfPCell cell;
            int size = 20;
            Font font = new Font(BaseFont.createFont("C://Windows//Fonts//simfang.ttf", BaseFont.IDENTITY_H,
                    BaseFont.NOT_EMBEDDED));
            for(int i = 0;i<products.size();i++) { 
                cell = new PdfPCell(new Phrase(products.get(i).getProductCode(),font));//产品编号
                cell.setFixedHeight(size);
                table.addCell(cell);
                cell = new PdfPCell(new Phrase(products.get(i).getProductName(),font));//产品名称
                cell.setFixedHeight(size);
                table.addCell(cell);
                cell = new PdfPCell(new Phrase(products.get(i).getPrice()+"",font));//产品价格
                cell.setFixedHeight(size);
                table.addCell(cell);
            }
            return table;
        }
    }

### 5、PDF类 ###

package com.example.demo.entity;
    
    import com.example.demo.util.PdfUtil;
    import com.lowagie.text.Document;
    import com.lowagie.text.pdf.PdfWriter;
    import org.springframework.web.servlet.view.document.AbstractPdfView;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.util.Date;
    import java.util.List;
    import java.util.Map;
    
    /** * @ClassName ViewPDF * @Description * @Author 戴书博 * @Date 2019/11/19 22:56 * @Version 1.0 **/
    public class ViewPDF  extends AbstractPdfView { 
    
        @Override
        protected void buildPdfDocument(Map<String, Object> model, Document document, PdfWriter writer,
                                        HttpServletRequest request, HttpServletResponse response) throws Exception { 
            // 设置response方式,使执行此controller时候自动出现下载页面,而非直接使用excel打开
            String fileName = new Date().getTime()+"_quotation.pdf";
            response.setCharacterEncoding("UTF-8");
            response.setContentType("application/pdf");
    // response.setHeader("Content-Disposition","filename=" + new String(fileName.getBytes(), "iso8859-1"));
    //直接下载
            response.setHeader("Content-Disposition","attachment;filename=" + new String(fileName.getBytes(), "iso8859-1"));
            List<Product> products = (List<Product>) model.get("sheet");
            PdfUtil pdfUtil = new PdfUtil();
            pdfUtil.createPDF(document, writer, products);
        }
    }

### 注意问题 ###

*  这里的Document对象是import com.lowagie.text.Document;
 *  当请求头是： response.setHeader(“Content-Disposition”,“filename=” + new String(fileName.getBytes(), “iso8859-1”));  
    显示页面  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ_size_16_color_FFFFFF_t_70]
 *  当是 response.setHeader(“Content-Disposition”,“attachment;filename=” + new String(fileName.getBytes(), “iso8859-1”));  
    ![在这里插入图片描述][20191119234741328.png]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191119234524159.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU4ODQ5NQ==,size_16,color_FFFFFF,t_70
[20191119234741328.png]: https://img-blog.csdnimg.cn/20191119234741328.png