Java实现PDF导出功能

<>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

* 生成效果如下所示：

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