createpdfdocument.java

主题：用iText输出PDF报表 内容组织： 1. 自我介绍 2. 简要介绍报表是什么 3. 为什么要输出PDF

package com.aptech.demo.itext.web;

import java.awt.Color;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.List;

import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Font;
import com.lowagie.text.PageSize;
import com.lowagie.text.Paragraph;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfPCell;
import com.lowagie.text.pdf.PdfPTable;
import com.lowagie.text.pdf.PdfWriter;

public class CreatePDFDocument {
	private List<Book> bookList = null;
	private ByteArrayOutputStream baos;

	public CreatePDFDocument(List<Book> bookList) {
		this.bookList = bookList;
		baos = new ByteArrayOutputStream();
	}

	public ByteArrayOutputStream createPDFDocument() throws DocumentException,
			IOException {
		Rectangle rec = new Rectangle(PageSize.A4);
		Document doc = new Document(rec);
		PdfWriter.getInstance(doc, baos);
		doc.open();
		doc.add(addContent());
		doc.close();
		return baos;
	}

	private PdfPTable addContent() throws DocumentException, IOException {
		BaseFont bf = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H",
				BaseFont.NOT_EMBEDDED);
		Font fontHead = new Font(bf, 12, Font.BOLD, Color.blue);
		PdfPTable table = new PdfPTable(4);
		table.setWidths(new float[] { 35, 40, 20, 10 });
		table.setWidthPercentage(100); // 宽度百分比
		table.getDefaultCell().setPadding(5);
		table.getDefaultCell().setBorderWidth(2);
		table.setHorizontalAlignment(PdfPTable.ALIGN_CENTER);
		table.getDefaultCell().setHorizontalAlignment(PdfPCell.ALIGN_LEFT);
		if (bookList.isEmpty()) {
			PdfPCell cellHead = new PdfPCell(new Paragraph("没有符合条件的图书！",
					fontHead));
			cellHead.setColspan(4);
			cellHead.setHorizontalAlignment(PdfPCell.ALIGN_CENTER);
			table.addCell(cellHead);
			table.setHeaderRows(0);
			table.getDefaultCell().setBorderWidth(2);
			table.getDefaultCell().setPadding(3);
			return table;
		}
		PdfPCell bookName = new PdfPCell(new Paragraph("图书名称", fontHead));
		bookName.setHorizontalAlignment(PdfPCell.ALIGN_LEFT);

		PdfPCell author = new PdfPCell(new Paragraph("作者", fontHead));
		author.setHorizontalAlignment(PdfPCell.ALIGN_LEFT);

		PdfPCell publisher = new PdfPCell(new Paragraph("出版社", fontHead));
		publisher.setHorizontalAlignment(PdfPCell.ALIGN_LEFT);

		PdfPCell price = new PdfPCell(new Paragraph("价格", fontHead));
		price.setHorizontalAlignment(PdfPCell.ALIGN_LEFT);

		table.addCell(bookName);
		table.addCell(author);
		table.addCell(publisher);
		table.addCell(price);

		Font font = new Font(bf, 10, Font.NORMAL);
		for (int i = 0; i < bookList.size(); i++) {
			Book book = bookList.get(i);
			PdfPCell cell1 = new PdfPCell(new Paragraph(book.getBookName(),
					font));
			cell1.setHorizontalAlignment(PdfPCell.ALIGN_LEFT);
			cell1.setVerticalAlignment(PdfPCell.ALIGN_MIDDLE);

			PdfPCell cell2 = new PdfPCell(new Paragraph(book.getAuthor(), font));
			cell2.setHorizontalAlignment(PdfPCell.ALIGN_LEFT);
			cell2.setVerticalAlignment(PdfPCell.ALIGN_MIDDLE);

			PdfPCell cell3 = new PdfPCell(new Paragraph(book.getPublisher(),
					font));
			cell3.setHorizontalAlignment(PdfPCell.ALIGN_LEFT);
			cell3.setVerticalAlignment(PdfPCell.ALIGN_MIDDLE);

			PdfPCell cell4 = new PdfPCell(new Paragraph(book.getPrice()
					.toString(), font));
			cell4.setHorizontalAlignment(PdfPCell.ALIGN_LEFT);
			cell4.setVerticalAlignment(PdfPCell.ALIGN_MIDDLE);

			table.addCell(cell1);
			table.addCell(cell2);
			table.addCell(cell3);
			table.addCell(cell4);
			table.setHeaderRows(0);
			table.getDefaultCell().setBorderWidth(2);
			table.getDefaultCell().setPadding(3);
		}
		return table;
	}
}