自己的第二篇部落格，itext5生成pdf，變成流直接傳回給浏覽器，直接上代碼，具體看代碼注釋
發現一個問題，有些部落格也附上代碼 但是根本不告訴你裡面的引用是出自什麼包，這個讓人很頭疼，自己就遇見過很多類似問題。
第一步：引包如下
<!--PDF前兩個是itext5生成pdf必須-->
<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>
<!--後兩個是google生成二維碼-->
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.3.3</version>
</dependency>
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.3.3</version>
</dependency>
具體引包如下：
import com.beta.small.controller.dto.InspectionItemResultDto;
import com.beta.small.controller.dto.InspectionResultPrintDto;
import com.beta.small.daolib.constant.InspectionStatus;
import com.beta.small.daolib.dao.VehicleBaseDao;
import com.beta.small.daolib.dao.VehicleDeviceDao;
import com.beta.small.daolib.model.VehicleBase;
import com.beta.small.daolib.model.VehicleDevice;
import com.itextpdf.text.*;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.PdfPCell;
import com.itextpdf.text.pdf.PdfPTable;
import com.itextpdf.text.pdf.PdfWriter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import javax.servlet.http.HttpServletResponse;
import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.text.SimpleDateFormat;
代碼如下：
public class CreatePdfNew {
//printDtoList自己的參數資料，根據業務自己擷取
//response 将pdf直接變成流傳回給浏覽器
public void createPdf(java.util.List<InspectionResultPrintDto> printDtoList, HttpServletResponse response){
try {
//頁面大小
Rectangle rect = new Rectangle(PageSize.A4);
//頁面背景色
rect.setBackgroundColor(BaseColor.WHITE);
// 1.建立document對象
Document document = new Document(rect);
//頁邊空白
document.setMargins(16, 16, 56, 16);
// 2.書寫器(Writer)與document對象關聯，通過書寫器(Writer)将文檔寫入到磁盤中或者浏覽器，本例傳回給浏覽器。
PdfWriter.getInstance(document, response.getOutputStream());
// 3.打開文檔
document.open();
//中文字型,解決中文不能顯示問題，沒有此段中文不顯示
BaseFont bfChinese = BaseFont.createFont("STSong-Light","UniGB-UCS2-H",BaseFont.NOT_EMBEDDED);
//将自有業務資料循環指派給pdf
for (InspectionResultPrintDto list :printDtoList){
//每次建立一個pdf頁
document.newPage();
//建立一個表格，資料代表列數，行數不用填寫，會随着PdfCell自增
PdfPTable tablePage = new PdfPTable(5);
//設定居中
tablePage.setHorizontalAlignment(Element.ALIGN_CENTER);
//設定每列的具體寬度
tablePage.setWidthPercentage(new float[]{100f, 135f, 100f, 35f, 250f},rect);
//設定表格總高度，setLockedWidth(true)必須，否則不好用
tablePage.setLockedWidth(true);
tablePage.setTotalWidth(510);//設定表格的總寬度
//設定字型格式，Bold将自己加粗
Font fontTitle = new Font(bfChinese,23,Font.BOLD);
//建立一個單元格
PdfPCell content01 = new PdfPCell();
//二維碼對象，将二維碼攜帶資訊帶入生成方法中，具體生成方法在後面，
ByteArrayOutputStream outputStream = encode(list.getInspectionNo());
//建立一個圖檔對象，插入圖檔
Image cImg = Image.getInstance(outputStream.toByteArray());
//設定圖檔大小
cImg.scaleAbsolute(80, 80);// 直接設定顯示尺寸
cImg.setBorder(Image.BOX);
//将圖檔資訊放入chunk，這裡面chunk為最小單元，phrase為第二小單元 之後是段落，此處不做具體介紹，可自行百度
content01.setPhrase(new Phrase(new Chunk(cImg, 0, 0, true)));
//單元格的邊框顯示，具體隐藏代碼見下面
content01.disableBorderSide(8);
//将單元格放入表格中
tablePage.addCell(content01);
//這裡面要注意，單元格是一個一個的順序插入資料的，舉個例子一行一列我們暫命名11，一行二列命名12，他是資料插 入11後再插入12，在//插入13，等第一行滿了之後自動從第二行21開始插入
PdfPCell title = new PdfPCell();
title.setPhrase(new Phrase(new Chunk(" 廣州市車輛終端入網許可證",fontTitle)));
//下面3行為單元格設定水準居中，和垂直居中設定，其中setUseAscender必須，否則不好用
title.setUseAscender(true);
title.setHorizontalAlignment(Element.ALIGN_LEFT);//水準居中
title.setVerticalAlignment(Element.ALIGN_MIDDLE); //垂直居中
title.setFixedHeight(80);
//合并單元格方法，我們定義5列，其中11的位置放入圖檔，2-5列合并，是以剩下4列，直接設定setColspan(4)，後面四個單元格就會合并
title.setColspan(4);
title.disableBorderSide(4);
tablePage.addCell(title);
//設定字型格式
Font font = new Font(bfChinese,15,Font.BOLD);
Font fontValue = new Font(bfChinese,15);
PdfPCell content11 = new PdfPCell();
content11.setPhrase(new Phrase(new Chunk("車牌号",font)));
content11.setUseAscender(true);
content11.setHorizontalAlignment(Element.ALIGN_LEFT);//水準居中
content11.setVerticalAlignment(Element.ALIGN_MIDDLE); //垂直居中
content11.setFixedHeight(45);
tablePage.addCell(content11);
PdfPCell content12 = new PdfPCell();
content12.setPhrase(new Phrase(new Chunk(list.getPlateCode(),fontValue)));
content12.setUseAscender(true);
content12.setHorizontalAlignment(Element.ALIGN_LEFT);//水準居中
content12.setVerticalAlignment(Element.ALIGN_MIDDLE); //垂直居中
tablePage.addCell(content12);
PdfPCell content13 = new PdfPCell();
content13.setPhrase(new Phrase(new Chunk("所屬公司",font)));
content13.setUseAscender(true);
content13.setHorizontalAlignment(Element.ALIGN_LEFT);//水準居中
content13.setVerticalAlignment(Element.ALIGN_MIDDLE); //垂直居中
tablePage.addCell(content13);
PdfPCell content14 = new PdfPCell();
content14.setPhrase(new Phrase(new Chunk(list.getTransportationName(),fontValue)));
content14.setUseAscender(true);
content14.setHorizontalAlignment(Element.ALIGN_LEFT);//水準居中
content14.setVerticalAlignment(Element.ALIGN_MIDDLE); //垂直居中
content14.setColspan(2);
tablePage.addCell(content14);
//下面2行查詢自己業務資訊放入PDF，根據自有業務修改
VehicleBase vehicleBase = vehicleBaseDao.findOneActive(list.getVehicleId());
VehicleDevice vehicleDevice = vehicleDeviceDao.findOneActive(vehicleBase.getDeviceId());
PdfPCell content21 = new PdfPCell();
content21.setPhrase(new Phrase(new Chunk("品牌型号",font)));
content21.setUseAscender(true);
content21.setHorizontalAlignment(Element.ALIGN_LEFT);//水準居中
content21.setVerticalAlignment(Element.ALIGN_MIDDLE); //垂直居中
content21.setFixedHeight(45);
tablePage.addCell(content21);
PdfPCell content22 = new PdfPCell();
String brand = "";
if(vehicleBase.getBrand()!=null&&!"".equals(vehicleBase.getBrand())){
brand = vehicleBase.getBrand();
}
content22.setPhrase(new Phrase(new Chunk(brand,fontValue)));
content22.setUseAscender(true);
content22.setHorizontalAlignment(Element.ALIGN_LEFT);//水準居中
content22.setVerticalAlignment(Element.ALIGN_MIDDLE); //垂直居中
tablePage.addCell(content22);
PdfPCell content23 = new PdfPCell();
content23.setPhrase(new Phrase(new Chunk("銷售公司",font)));
content23.setUseAscender(true);
content23.setHorizontalAlignment(Element.ALIGN_LEFT);//水準居中
content23.setVerticalAlignment(Element.ALIGN_MIDDLE); //垂直居中
tablePage.addCell(content23);
PdfPCell content24 = new PdfPCell();
String salesCompany = "";
if(vehicleBase.getSalesCompany()!=null&&!"".equals(vehicleBase.getSalesCompany())){
salesCompany = vehicleBase.getSalesCompany();
}
content24.setPhrase(new Phrase(new Chunk(salesCompany,fontValue)));
content24.setUseAscender(true);
content24.setHorizontalAlignment(Element.ALIGN_LEFT);//水準居中
content24.setVerticalAlignment(Element.ALIGN_MIDDLE); //垂直居中
content24.setColspan(2);
tablePage.addCell(content24);
PdfPCell content31 = new PdfPCell();
content31.setPhrase(new Phrase(new Chunk("終端裝置号",font)));
content31.setUseAscender(true);
content31.setHorizontalAlignment(Element.ALIGN_LEFT);//水準居中
content31.setVerticalAlignment(Element.ALIGN_MIDDLE); //垂直居中
content31.setFixedHeight(45);
tablePage.addCell(content31);
PdfPCell content32 = new PdfPCell();
content32.setPhrase(new Phrase(new Chunk(list.getCommunicationNo(),fontValue)));
content32.setUseAscender(true);
content32.setHorizontalAlignment(Element.ALIGN_LEFT);//水準居中
content32.setVerticalAlignment(Element.ALIGN_MIDDLE); //垂直居中
tablePage.addCell(content32);
PdfPCell content33 = new PdfPCell();
content33.setPhrase(new Phrase(new Chunk("終端型号",font)));
content33.setUseAscender(true);
content33.setHorizontalAlignment(Element.ALIGN_LEFT);//水準居中
content33.setVerticalAlignment(Element.ALIGN_MIDDLE); //垂直居中
tablePage.addCell(content33);
PdfPCell content34 = new PdfPCell();
String model = "";
if(vehicleDevice.getModel()!=null&&!"".equals(vehicleDevice.getModel())){
model = vehicleDevice.getModel();
}
content34.setPhrase(new Phrase(new Chunk(model,fontValue)));
content34.setUseAscender(true);
content34.setHorizontalAlignment(Element.ALIGN_LEFT);//水準居中
content34.setVerticalAlignment(Element.ALIGN_MIDDLE); //垂直居中
content34.setColspan(2);
tablePage.addCell(content34);
PdfPCell content41 = new PdfPCell();
content41.setPhrase(new Phrase(new Chunk("驗收項及驗收結果",font)));
content41.setUseAscender(true);
content41.setHorizontalAlignment(Element.ALIGN_LEFT);//水準居中
content41.setVerticalAlignment(Element.ALIGN_MIDDLE); //垂直居中
content41.setFixedHeight(45);
tablePage.addCell(content41);
PdfPCell content42 = new PdfPCell();
content42.setRowspan(4);
PdfPTable tableItem = new PdfPTable(2);
//此處用到了表格嵌套，就是在合并的單元格内嵌套進入新表格
java.util.List<InspectionItemResultDto> itemResultDto = list.getItemResultDto();
for (InspectionItemResultDto item :itemResultDto){
Font black = new Font(bfChinese,12);
Font red = new Font(bfChinese,12);
red.setColor(BaseColor.RED);
PdfPCell cell11 = new PdfPCell();
cell11.disableBorderSide(15);//去邊框
Phrase para1 = new Phrase(item.getName(),black);
cell11.setPhrase(para1);
tableItem.addCell(cell11);
PdfPCell cell21 = new PdfPCell();
cell21.disableBorderSide(15);//去邊框
Phrase para2 = new Phrase(item.getInspectionStatus(),red);
cell21.setPhrase(para2);
tableItem.addCell(cell21);
}
content42.addElement(tableItem);
content42.setColspan(4);
tablePage.addCell(content42);
PdfPCell content51 = new PdfPCell();
content51.setPhrase(new Phrase(new Chunk("驗收結果："+list.getInspectionStatus(),font)));
content51.setColspan(5);
content51.disableBorderSide(2);
tablePage.addCell(content51);
PdfPCell content61 = new PdfPCell();
content61.setPhrase(new Phrase(new Chunk("驗收意見："+list.getInspectionOpinion(),font)));
content61.setColspan(5);
content61.disableBorderSide(3);
tablePage.addCell(content61);
PdfPCell content71 = new PdfPCell();
content71.setPhrase(new Phrase(new Chunk(" ",font)));
content71.setColspan(5);
content71.disableBorderSide(3);
tablePage.addCell(content71);
PdfPCell content81 = new PdfPCell();
content81.setPhrase(new Phrase(new Chunk(" ",font)));
content81.setColspan(5);
content81.disableBorderSide(3);
tablePage.addCell(content81);
Font foot = new Font(bfChinese,12);
PdfPCell content91 = new PdfPCell();
SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd");
content91.setPhrase(new Phrase(new Chunk("驗收時間："
+sd.format(list.getInspectionTime())+" 驗收人："+list.getInspectorName()+" 驗收機關：",foot)));
content91.disableBorderSide(11);
content91.setColspan(4);
tablePage.addCell(content91);
PdfPCell content94 = new PdfPCell();
content94.setPhrase(new Phrase(new Chunk(list.getInstallationName(),foot)));
content94.disableBorderSide(7);
tablePage.addCell(content94);
Font bottom = new Font(bfChinese,2);
PdfPCell content101 = new PdfPCell();
content101.setPhrase(new Phrase(new Chunk(" ",bottom)));
content101.setColspan(5);
content101.disableBorderSide(1);
tablePage.addCell(content101);
//将表格放入到document中，
document.add(tablePage);
}
// 5.關閉文檔
document.close();
} catch (DocumentException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
}
}
}
//生成二維碼方法
public ByteArrayOutputStream encode(String inspectionNo) {
int width = 98;
int height = 98;
String format = "jpg";
Hashtable hints = new Hashtable();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
BitMatrix bitMatrix = null;
try {
bitMatrix = new MultiFormatWriter().encode(inspectionNo, BarcodeFormat.QR_CODE, width, height, hints);
} catch (WriterException e) {
e.printStackTrace();
}
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
try {
MatrixToImageWriter.writeToStream(bitMatrix, format, outputStream);
} catch (IOException e) {
e.printStackTrace();
}
return outputStream;
}
附帶邊框設計方法，此處摘自https://blog.csdn.net/cfup_less/article/details/82686426
感謝部落客的邊框總結
//建立單元格對象
PdfPCell cell = new PdfPCell(new Phrase("test"));
//隐藏上邊框
cell.disableBorderSide(1);
//隐藏下邊框
cell.disableBorderSide(2);
//隐藏上、下邊框
cell.disableBorderSide(3);
//隐藏左邊框
cell.disableBorderSide(4);
//隐藏左、上邊框
cell.disableBorderSide(5);
//隐藏左、下邊框
cell.disableBorderSide(6);
//隐藏左、上、下邊框
cell.disableBorderSide(7);
//隐藏右邊框
cell.disableBorderSide(8);
//隐藏右、上邊框
cell.disableBorderSide(9);
//隐藏右、下邊框
cell.disableBorderSide(10);
//隐藏右、上、下邊框
cell.disableBorderSide(11);
//隐藏左、右邊框
cell.disableBorderSide(12);
//隐藏上、左、右邊框
cell.disableBorderSide(13);
//隐藏下、左、右邊框
cell.disableBorderSide(14);
//隐藏全部
cell.disableBorderSide(15);
---------------------
作者：cfup_less
來源：CSDN
原文：https://blog.csdn.net/cfup_less/article/details/82686426
版權聲明：本文為部落客原創文章，轉載請附上博文連結！
Pdf建立結果如下：
![DataTable..::.ToString 方法[圖]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)