Java生成PDF之iTextPDF的使用

　　今天做财务方面相关数据的导出功能，需要导出PDF和Excel，在项目经理那里得知有一个叫iTextPDF的java框架导出PDF文件很好用，于是拿来玩儿玩儿。

 package com.smart.produce.modules.finance.controller;

 import com.alibaba.fastjson.JSONObject;
 import com.itextpdf.text.Document;
 import com.itextpdf.text.PageSize;
 import com.itextpdf.text.Rectangle;
 import com.itextpdf.text.pdf.PdfWriter;
 import com.smart.produce.modules.finance.service.IExportService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.ResponseBody;

 import javax.servlet.http.HttpServletRequest;
 import java.io.FileOutputStream;
 import java.lang.reflect.Method;

 @Controller
 @RequestMapping("${admin.url.prefix}/finance/export")
 public class ExportController {

     @Autowired
     private IExportService exportService;

     private String exportPath = "/static/financeExport";

     @ResponseBody
     @RequestMapping(value="exportPDF", method={RequestMethod.GET, RequestMethod.POST})
     public String expStatementPDF(HttpServletRequest request, String name) {
         JSONObject result = new JSONObject();
         result.put("code", 0);
         result.put("msg", "success");
         // 输出文件路径
         String filePath = exportPath + "/" + name + ".pdf";
         result.put("data", filePath);
         String realPath = request.getServletContext().getRealPath("/");
         try {
             //Step 1—Create a Document.
             Rectangle rectangle = new Rectangle(PageSize.A4);
             Document document = new Document(rectangle);
             document.setMargins(20, 20, 40, 40);
             //Step 2—Get a PdfWriter instance.
             PdfWriter.getInstance(document, new FileOutputStream(realPath + filePath));
             //Step 3—Open the Document.
             document.open();
             //Step 4—Add content.
             Method method = IExportService.class.getDeclaredMethod(name + "Print", new Class[]{Document.class, String.class});
             method.invoke(exportService, document, realPath);
             //Step 5—Close the Document.
             document.close();
         } catch(Exception e) {
             e.printStackTrace();
             result.put("code", -1);
             result.put("msg", e.getMessage());
         }
         return result.toString();
     }

 }

生成文档类

 package com.smart.produce.modules.finance.service.impl;

 import com.alibaba.fastjson.JSONArray;
 import com.alibaba.fastjson.JSONObject;
 import com.itextpdf.text.*;
 import com.itextpdf.text.pdf.BaseFont;
 import com.itextpdf.text.pdf.PdfPCell;
 import com.itextpdf.text.pdf.PdfPTable;
 import com.smart.produce.modules.basic.entity.Customer;
 import com.smart.produce.modules.basic.service.ICustomerService;
 import com.smart.produce.modules.finance.service.IExportService;
 import com.smart.produce.modules.finance.service.IFinReceiptService;
 import com.smart.produce.modules.printorder.service.IOprPrintOrderService;
 import com.smart.produce.modules.printorder.service.ISettlementService;
 import com.smart.produce.modules.sys.service.IUserService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;

 import java.util.ArrayList;
 import java.util.List;

 /**
  * @Title: PDF输出
  * @Description: PDF输出
  * @author guanghe
  * @date 2018-09-26 15:32:08
  * @version V1.0
  *
  */
 @Service("finExportService")
 public class ExportServiceImpl  implements IExportService {

     @Autowired
     protected IUserService userService;

     @Autowired
     protected IOprPrintOrderService oprPrintOrderService;

     @Autowired
     protected IFinReceiptService finReceiptService;

     @Autowired
     protected ICustomerService customerService;

     @Autowired
     protected ISettlementService settlementService;

     // 标题字体
     private Font simheiBig = null;
     // 副标题字体
     private Font simheiMiddle = null;
     // 表头字体
     private Font simhei = null;
     // 正文字体
     private Font simfang = null;
     // 正文加粗字体
     private Font simfangBold = null;

     //初始化字体
     protected void initFonts(String realPath) throws Exception{
         String fontPath = realPath +"/static/fonts";
         if(simhei == null) {
             BaseFont baseFont = BaseFont.createFont(fontPath + "/simhei.ttf", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
             simheiBig = new Font(baseFont, 20);
             simheiMiddle = new Font(baseFont, 16);
             simhei = new Font(baseFont, 12);
             baseFont = BaseFont.createFont(fontPath + "/simfang.ttf", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
             simfang = new Font(baseFont, 10);
             simfangBold = new Font(baseFont, 10, Font.BOLD);
         }
     }

     protected PdfPCell getCell(String content) {
         Paragraph p = new Paragraph(content, simfangBold);
         p.setAlignment(Element.ALIGN_CENTER);
         PdfPCell cell = new PdfPCell();
         cell.addElement(p);
         cell.setBorderColor(BaseColor.LIGHT_GRAY);
         cell.setFixedHeight(25);
         cell.setUseAscender(true);
         cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
         return cell;
     }

     @Override
     public void statementPrint(Document document, String realPath, String dataStr) throws Exception {
         initFonts(realPath);
         JSONObject data = JSONObject.parseObject(dataStr);
         String customerId = data.getString("customerId");
         Customer customer = customerService.selectById(customerId);
         JSONArray detail = data.getJSONArray("detail");
         //创建三列的表头表格
         PdfPTable tbTitle = new PdfPTable(3);
         //去掉表头表格的边框
         int wtTitle[] = {30,40,30};
         tbTitle.setWidths(wtTitle);
         tbTitle.getDefaultCell().setBorder(0);
         //留出空余
         tbTitle.addCell("");
         //添加主标题
         PdfPCell cellTitle = new PdfPCell();
         Paragraph pTitle = new Paragraph();
         Chunk chkTitle = new Chunk("对 账 单", simheiBig);
         chkTitle.setUnderline(1, -3f);
         pTitle.add(chkTitle);
         pTitle.setAlignment(Element.ALIGN_CENTER);
         cellTitle.addElement(pTitle);
         cellTitle.setVerticalAlignment(Element.ALIGN_BOTTOM);
         cellTitle.setBorder(0);
         tbTitle.addCell(cellTitle);
         //添加标注
         PdfPCell cellLabel = new PdfPCell();
         Paragraph pLabel = new Paragraph("单据记录式", simheiMiddle);
         pLabel.setAlignment(Element.ALIGN_RIGHT);
         cellLabel.setVerticalAlignment(Element.ALIGN_TOP);
         cellLabel.setBorder(0);
         cellLabel.addElement(pLabel);
         tbTitle.addCell(cellLabel);
         document.add(tbTitle);
         //添加空行
         Paragraph blankRow = new Paragraph(18f, " ");
         document.add(blankRow);
         //添加副标题
         PdfPTable tbSubtitle = new PdfPTable(1);
         PdfPCell cellSubtitle = new PdfPCell();
         Paragraph pSubtitle = new Paragraph("客户信息", simheiMiddle);
         cellSubtitle.addElement(pSubtitle);
         cellSubtitle.setPaddingBottom(5);
         cellSubtitle.setBorderWidthTop(0);
         cellSubtitle.setBorderWidthLeft(0);
         cellSubtitle.setBorderWidthRight(0);
         cellSubtitle.setBorderWidthBottom(2);
         tbSubtitle.addCell(cellSubtitle);
         document.add(tbSubtitle);
         //添加明细表头
         PdfPTable tbNote = new PdfPTable(3);
         int wtNote[] = {30,40,30};
         tbNote.setWidths(wtNote);
         //添加客户编号
         PdfPCell cellNo = new PdfPCell();
         Paragraph pNo = new Paragraph("客户编号：" + customer.getCustomerNo(), simhei);
         cellNo.addElement(pNo);
         cellNo.setBorder(0);
         tbNote.addCell(cellNo);
         //添加客户名称
         PdfPCell cellName = new PdfPCell();
         Paragraph pName = new Paragraph("客户名称：" + customer.getCustomerName(), simhei);
         cellName.addElement(pName);
         cellName.setBorder(0);
         tbNote.addCell(cellName);
         //添加联系方式
         PdfPCell cellContact = new PdfPCell();
         Paragraph pContact = new Paragraph("联系电话：" + customer.getPhone(), simhei);
         pContact.setAlignment(Element.ALIGN_RIGHT);
         cellContact.addElement(pContact);
         cellContact.setBorder(0);
         tbNote.addCell(cellContact);
         document.add(tbNote);
         //添加空行
         document.add(blankRow);
         //添加明细表格
         PdfPTable tbDetail = new PdfPTable(7);
         int wtDetail[] = {7, 18, 15, 15, 15, 15, 15};;
         tbDetail.setWidths(wtDetail);
         String heads[] = {"序号", "订单编号", "订单日期", "订单经手", "订单金额", "已清金额", "未清金额"};
         for(int i = 0; i < heads.length; i++) {
             PdfPCell cellHead = getCell(heads[i]);
             cellHead.setBackgroundColor(new BaseColor(230,230,230));
             tbDetail.addCell(cellHead);
         }
         document.add(tbDetail);
         for(int i = 0; i < detail.size(); i++) {
             JSONObject item = detail.getJSONObject(i);
             PdfPTable table = new PdfPTable(7);
             int width[] = {7, 18, 15, 15, 15, 15, 15};
             table.setWidths(width);
             String num = (i + 1) + "";
             List<String> contents = new ArrayList<String>(){{
                 add(num);
                 add(item.getString("orderNo"));
                 add(item.getString("createDate"));
                 add(item.getJSONObject("createBy").getString("username"));
                 add(item.getString("orderAmount"));
                 add(item.getString("receivedAmount"));
                 add(item.getString("debtAmount"));
             }};
             for(int j = 0; j < contents.size(); j++) {
                 PdfPCell cell = getCell(contents.get(j));
                 table.addCell(cell);
             }
             document.add(table);
         }
     }

     @Override
     public void topupPrint(Document document, String realPath, String dataStr) throws Exception {

     }

     @Override
     public void receiptPrint(Document document, String realPath, String dataStr) throws Exception {
         initFonts(realPath);
         JSONObject data = JSONObject.parseObject(dataStr);
     }

     @Override
     public void prestoreExp() {

     }

     @Override
     public void topupExp() {

     }

     @Override
     public void receiptExp() {

     }

     @Override
     public void summaryExp() {

     }
 }