exportpdf.java

企业人力资源管理

package com.y2.hr.human.common;

import java.io.*;

import java.lang.reflect.*;

import java.util.*;
import java.util.List;

import com.lowagie.text.*;

import com.lowagie.text.pdf.*;

import java.awt.Color;

import javax.swing.JOptionPane;

import java.net.MalformedURLException;

import java.text.SimpleDateFormat;

/**
 * 
 * 利用开源组件IText动态导出PDF文档 转载时请保留以下信息，注明出处！
 * 
 * 请注意务必要保证path指定处有图片
 * 
 * @author Rocky
 * 
 * @version v1.0
 * 
 * @param <T>
 * 
 * 应用泛型，代表任意一个符合javabean风格的类
 * 
 * 注意这里为了简单起见，boolean型的属性xxx的get器方式为getXxx(),而不是isXxx()
 * 
 * byte[]表示图片数据,注意合适的大小
 * 
 */

public class ExportPdf<T> {
	/**
	 * 根据指定的列导出数据
	 * 
	 * @param title
	 *            导出的文件标题
	 * @param headers
	 *            导出的列名
	 * @param dataset
	 *            导出的数据集合
	 * @param out
	 *            输出流
	 */
	public void exportPdf(String title, String[] headers, List dataset,
			OutputStream out) {
		String pattern = "yyyy-MM-dd";
		// 作为报表的PDF文件，一定要适合打印机的输出打印
		Rectangle rectPageSize = new Rectangle(PageSize.A4);// 定义A4页面大小
		rectPageSize = rectPageSize.rotate();// 加上这句可以实现A4页面的横置
		Document document = new Document(rectPageSize, 50, 50, 50, 50);// 其余4个参数，设置了页面的4个边距
		try {
			// 将PDF文档写出到out所关联IO设备上的书写对象
			PdfWriter.getInstance(document, out);
			// 添加文档元数据信息
			document.addTitle(StrHelp.toCN(title));
			document.addSubject("export information");
			document.addAuthor("Rocky");
			document.addCreator("Rocky");
			document.addKeywords("pdf itext");
			// 定义页头和页尾
			HeaderFooter header = new HeaderFooter(new PdfParagraph(title, 20,
					true), false);
			header.setAlignment(Element.ALIGN_CENTER);
			HeaderFooter footer = new HeaderFooter(new Phrase(
					"-Page "), new Phrase(" -"));
			footer.setAlignment(Element.ALIGN_CENTER);
			document.setHeader(header);
			document.setFooter(footer);
			// 打开PDF文档
			document.open();
			PdfPTable table = new PdfPTable(headers.length);
			// table.setHorizontalAlignment(Element.ALIGN_CENTER);
			table.setWidthPercentage(16 * headers.length);
			// 产生表格标题行
			for (int i = 0; i < headers.length; i++) {
				PdfPCell cell = new PdfPCell(new PdfParagraph(headers[i]
						.split("_")[1], 14, true));
				cell.setHorizontalAlignment(Cell.ALIGN_CENTER);
				cell.setVerticalAlignment(Cell.ALIGN_MIDDLE);
				cell.setBackgroundColor(Color.cyan);
				cell.setBorderColor(Color.green);
				table.addCell(cell);
			}
			for (int i = 0; i < dataset.size(); i++) {
				Object obj = dataset.get(i);
				for (int j = 0; j < headers.length; j++) {
					String s = headers[j].split("_")[0];
					String methodName = "get" + s.substring(0, 1).toUpperCase()
							+ s.substring(1);
					try {
						Method method = obj.getClass().getMethod(methodName,
								new Class[] {});
						Object value = method.invoke(obj, new Class[] {});
						PdfPCell cell = null;
						try {
							if ("NULL".equals(value.toString()))
								throw new Exception();
							cell = new PdfPCell(new PdfParagraph(value
									.toString()));
						} catch (Exception e) {
							cell = new PdfPCell(new PdfParagraph(" "));
						}
						cell.setHorizontalAlignment(Cell.ALIGN_CENTER);
						cell.setVerticalAlignment(Cell.ALIGN_MIDDLE);
						cell.setBorderColor(Color.green);
						table.addCell(cell);
					} catch (SecurityException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					} catch (NoSuchMethodException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					} catch (IllegalArgumentException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					} catch (IllegalAccessException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					} catch (InvocationTargetException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
				}
			}
			document.add(table);
			document.close();
			out.flush();
			out.close();
		} catch (DocumentException e) {
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

class PdfParagraph extends Paragraph {

	private static final long serialVersionUID = -244970043180837974L;

	public PdfParagraph(String content) {

		super(content, getChineseFont(12, false));

	}

	public PdfParagraph(String content, int fontSize, boolean isBold) {

		super(content, getChineseFont(fontSize, isBold));

	}

	// 设置字体-返回中文字体

	protected static Font getChineseFont(int nfontsize, boolean isBold) {

		BaseFont bfChinese;

		Font fontChinese = null;

		try {

			bfChinese = BaseFont.createFont("c:\\windows\\fonts\\simsun.ttc,1",

			BaseFont.IDENTITY_H, BaseFont.EMBEDDED);

			if (isBold) {

				fontChinese = new Font(bfChinese, nfontsize, Font.BOLD);

			} else {

				fontChinese = new Font(bfChinese, nfontsize, Font.NORMAL);

			}

		} catch (DocumentException e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		} catch (IOException e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}

		return fontChinese;

	}

	// 转化中文

	protected Cell ChangeCell(String str, int nfontsize, boolean isBold)

	throws IOException, BadElementException, DocumentException {

		Phrase ph = ChangeChinese(str, nfontsize, isBold);

		Cell cell = new Cell(ph);

		// cell.setBorderWidth(3);

		return cell;

	}

	// 转化中文

	protected Chunk ChangeChunk(String str, int nfontsize, boolean isBold)

	throws IOException, BadElementException, DocumentException {

		Font FontChinese = getChineseFont(nfontsize, isBold);

		Chunk chunk = new Chunk(str, FontChinese);

		return chunk;

	}

	// 转化中文

	protected Phrase ChangeChinese(String str, int nfontsize, boolean isBold)

	throws IOException, BadElementException, DocumentException {

		Font FontChinese = getChineseFont(nfontsize, isBold);

		Phrase ph = new Phrase(str, FontChinese);

		return ph;

	}
}