Java实现PDF导出功能

布满荆棘的人生 2023-10-02 22:13 66阅读 0赞

![在这里插入图片描述][8ce10dd3a97a4784bf410f21ac7fe933.jpeg_pic_center]

#### 一、添加依赖 ####

<dependency>
                <groupId>com.lowagie</groupId>
                <artifactId>itext</artifactId>
                <version>2.1.5</version>
            </dependency>

#### 二、实现示例代码 ####

*  如下代码中使用了 【SIMYOU.TTF】幼圆字体，根据需要可以自行下载

package com.lyp;
    
    import com.lowagie.text.*;
    import com.lowagie.text.Font;
    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.File;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.text.SimpleDateFormat;
    import java.util.*;
    import java.util.List;
    
    public class downLoadPDF {
        
    
    
        public static void main(String[] args) {
        
            String fileName = "test.pdf";
            String path = "D:pdf/";
    
            try {
        
                //创建文档，设置页面大小、左右上下边距
                Document document = new Document();
    
                //处理中文显示问题，使用资源字体
                BaseFont bfChinese = BaseFont.createFont("/font/SIMYOU.TTF",BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
    
                Font dateTitle = new Font(bfChinese,7,Font.NORMAL);
                Font title = new Font(bfChinese,12,Font.BOLD);//文字加粗
                Font textFont = new Font(bfChinese,7,Font.NORMAL);//文字正常
    
                //给出输出路径
                PdfWriter.getInstance(document, new FileOutputStream(path+fileName));
    
                //打开文档
                document.open();
    
                //标题
                PdfPTable tableTitle = new PdfPTable(3);
    
                PdfPTable codeTitle = new PdfPTable(1);
                //生成一个7列的表格
                PdfPTable table = new PdfPTable(7);
    
                //定义每个单元格的宽度
                float[] widthsHeaderTitle = {
        1f,1f,1f};
                float[] widthsCodeTitle = {
        1f};
                float[] widthsHeader = {
        1f,1f,1f,1f,1f,1f,2f};
    
                float lineHeight = (float)20.0;
    
                //设置表格每一格的宽度
                tableTitle.setWidths(widthsHeaderTitle);
                codeTitle.setWidths(widthsCodeTitle);
                table.setWidths(widthsHeader);
    
                //设置表格总体宽度
                tableTitle.setWidthPercentage(100);
                codeTitle.setWidthPercentage(100);
                table.setWidthPercentage(100);
    
                int colSpan = 1;
    
                SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                Date date = new Date(System.currentTimeMillis());
                //添加标题
                createTableCellLeft("导出人：行如火", textFont, tableTitle, lineHeight, colSpan);
                createTableCellCenter("确认出差记录表", title, tableTitle, lineHeight, colSpan);
                createTableCellRight(formatter.format(date), dateTitle, tableTitle, lineHeight, colSpan);
    
                document.add(tableTitle);
                createTableCellRight("功能码： XXXXXXXXX",textFont, codeTitle, lineHeight, colSpan);
                document.add(codeTitle);
                document.add(new Paragraph("\n"));
    
                String[] array = {
        "报表生成日期 ","状态 ", "经办人员 ", "提交时间 ","复核人员 ", "复核时间 ", "情况补充 "};
                for (String s : array) {
        
                    createTableCell(s, textFont, table, lineHeight, colSpan);
                }
                List<Map<String, Object>> dataResult = getResult();
    
                for (Map<String, Object> map : dataResult) {
        
                    String dataTime = map.get("dateTime") != null?map.get("dateTime").toString():"0";
                    String status = "0";
                    if (null != map.get("status")) {
        
                        if ("0".equals(map.get("status"))) {
        
                            status = "待确认";
                        }
                        if ("1".equals(map.get("status"))) {
        
                            status = "待复核";
                        }
                        if ("2".equals(map.get("status"))) {
        
                            status = "已复核";
                        }
                    }
                    String creator = map.get("creator") != null?map.get("creator").toString():"0";
                    String createTime = map.get("createTime") != null?map.get("createTime").toString():"0";
                    String updator = map.get("updator") != null?map.get("updator").toString():"0";
                    String updateTime = map.get("updateTime") != null?map.get("updateTime").toString():"0";
                    String description = map.get("description") != null?map.get("description").toString():"0";
    
                    createTableCell(dataTime, textFont, table, lineHeight, colSpan);
                    createTableCell(status, textFont, table, lineHeight, colSpan);
                    createTableCell(creator, textFont, table, lineHeight, colSpan);
                    createTableCell(createTime, textFont, table, lineHeight, colSpan);
                    createTableCell(updator, textFont, table, lineHeight, colSpan);
                    createTableCell(updateTime, textFont, table, lineHeight, colSpan);
                    createTableCell(description, textFont, table, lineHeight, colSpan);
                }
                document.add(table);
    
    
                document.close();
            } catch (DocumentException e) {
        
                e.printStackTrace();
            } catch (FileNotFoundException e) {
        
                e.printStackTrace();
            } catch (IOException e) {
        
                e.printStackTrace();
            }
    
            File file = new File(fileName);
            System.out.println(file);
        }
    
        private static void createTableCell(String text, Font font, PdfPTable table, float lineHeight, int colSapn) {
        
            PdfPCell cell;
            cell = new PdfPCell(new Paragraph(text,font));
            //合并单元格列
            cell.setColspan(colSapn);
            //设置水平居中
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            //设置垂直居中
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setFixedHeight(lineHeight);
            //将单元格内容添加到表格中
            table.addCell(cell);
        }
    
        private static void createTableCellLeft(String text, Font font, PdfPTable table, float lineHeight ,int colSapn) {
        
            PdfPCell cell;
            cell = new PdfPCell(new Paragraph(text,font));
            //合并单元格列
            cell.setColspan(colSapn);
            //设置水平
            cell.setHorizontalAlignment(Element.ALIGN_LEFT);
            //设置垂直
            cell.setVerticalAlignment(Element.ALIGN_BOTTOM);
            cell.setFixedHeight(lineHeight);
            cell.setBorderWidthRight(0);
            cell.setBorderWidthBottom(0);
            cell.setBorderWidthLeft(0);
            cell.setBorderWidthTop(0);
            //将单元格内容添加到表格中
            table.addCell(cell);
        }
    
        private static void createTableCellCenter(String text, Font font, PdfPTable table, float lineHeight ,int colSapn) {
        
            PdfPCell cell;
            cell = new PdfPCell(new Paragraph(text,font));
            //合并单元格列
            cell.setColspan(colSapn);
            //设置水平居中
            cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            //设置垂直居中
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cell.setFixedHeight(lineHeight);
            cell.setBorderWidthLeft(0);
            cell.setBorderWidthRight(0);
            cell.setBorderWidthBottom(0);
            cell.setBorderWidthTop(0);
    
            //将单元格内容添加到表格中
            table.addCell(cell);
    
        }
    
        private static void createTableCellRight(String text, Font font, PdfPTable table, float lineHeight , int colSapn) {
        
            PdfPCell cell;
            cell = new PdfPCell(new Paragraph(text,font));
            //合并单元格列
            cell.setColspan(colSapn);
            //设置水平
            cell.setHorizontalAlignment(Element.ALIGN_RIGHT);
            //设置垂直
            cell.setVerticalAlignment(Element.ALIGN_TOP);
            cell.setFixedHeight(lineHeight);
            //将单元格内容添加到表格中
            //去除边框
            cell.setBorderWidthLeft(0);
            cell.setBorderWidthBottom(0);
            cell.setBorderWidthRight(0);
            cell.setBorderWidthTop(0);
            table.addCell(cell);
        }
    
        private static List<Map<String, Object>> getResult() {
        
            List<Map<String, Object>> result = new ArrayList<>();
            for (int i = 0; i < 10; i++) {
        
                Map<String, Object> map = new HashMap<>();
                map.put("dateTime", "2022/10/11");
                map.put("creator", "行如火");
                map.put("createTime", "2022/10/10");
                map.put("updator", "疾如风");
                map.put("updateTime", "2022/10/11");
                if(i == 0) {
        
                    map.put("status", "0");
                    map.put("description", "测试导出PDF");
                } else if (i < 4){
        
                    map.put("status", "1");
                    map.put("description", "测试导出PDF"+i);
                } else {
        
                    map.put("status", "2");
                    map.put("description", "测试导出PDF"+i);
                }
                result.add(map);
            }
            System.out.println(result);
            return result;
        }
    }

#### 三、效果展示 ####

*  对应目录下生成test.pdf 文件  
    ![在这里插入图片描述][fa6537cbee2443fc91c033a081f1c2c6.png]
 *  生成效果如下所示：  
    ![在这里插入图片描述][51205dee48c3444494b0d8242e0825f7.png]  
    ![在这里插入图片描述][f5620714b6ca48d5827dedb2816ef8ec.jpeg_pic_center]

[8ce10dd3a97a4784bf410f21ac7fe933.jpeg_pic_center]: https://img-blog.csdnimg.cn/8ce10dd3a97a4784bf410f21ac7fe933.jpeg#pic_center
[fa6537cbee2443fc91c033a081f1c2c6.png]: https://img-blog.csdnimg.cn/fa6537cbee2443fc91c033a081f1c2c6.png
[51205dee48c3444494b0d8242e0825f7.png]: https://img-blog.csdnimg.cn/51205dee48c3444494b0d8242e0825f7.png
[f5620714b6ca48d5827dedb2816ef8ec.jpeg_pic_center]: https://img-blog.csdnimg.cn/f5620714b6ca48d5827dedb2816ef8ec.jpeg#pic_center