PdfReportHeaderFooter.java
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/**
* Project Name:html2pdf File Name:PdfReportHeaderFooter.java Package Name:com.kirin.common.util.pdf Date:2015年11月18日下午4:36:17 Copyright (c) 2015, PHXL All Rights Reserved.
*/
package com.phxl.common.util;
import java.io.IOException;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Element;
import com.itextpdf.text.Font;
import com.itextpdf.text.Image;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.Phrase;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.ColumnText;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfPageEventHelper;
import com.itextpdf.text.pdf.PdfTemplate;
import com.itextpdf.text.pdf.PdfWriter;
/**
* ClassName:PdfReportHeaderFooter <br/>
* Function: TODO ADD FUNCTION. <br/>
* Reason: TODO ADD REASON. <br/>
* Date: 2015年11月18日 下午4:36:17 <br/>
*
* @author
* @version
* @since JDK 1.6
* @see
*/
public class PdfReportHeaderFooter extends PdfPageEventHelper {
public String header = "";
public int presentFontSize = 12;
public Rectangle pageSize = PageSize.A4;
public PdfTemplate total;
public BaseFont bf = null;
public Font fontDetail = null;
public String waterMarkImgSrc = "";
public PdfReportHeaderFooter() {
}
public PdfReportHeaderFooter(String header, int presentFontSize, Rectangle pageSize) {
this.header = header;
this.presentFontSize = presentFontSize;
this.pageSize = pageSize;
}
public PdfReportHeaderFooter(String waterMarkImgSrc) {
this.waterMarkImgSrc = waterMarkImgSrc;
}
public void setHeader(String header) {
this.header = header;
}
public void setPresentFontSize(int presentFontSize) {
this.presentFontSize = presentFontSize;
}
public String getWaterMarkImgSrc() {
return waterMarkImgSrc;
}
public void setWaterMarkImgSrc(String waterMarkImgSrc) {
this.waterMarkImgSrc = waterMarkImgSrc;
}
public void onOpenDocument(PdfWriter writer, Document document) {
total = writer.getDirectContent().createTemplate(50, 50);
}
public void onEndPage(PdfWriter writer, Document document) {
try {
if (bf == null) {
bf = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", false);
}
if (fontDetail == null) {
fontDetail = new Font(bf, presentFontSize, Font.NORMAL);// 数据体字体
}
} catch (DocumentException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
// 1.写入页眉
ColumnText.showTextAligned(writer.getDirectContent(), Element.ALIGN_LEFT, new Phrase(header, fontDetail),
document.left(), document.top() + 20, 0);
// 2.写入前半部分的 第 X页/共
int pageS = writer.getPageNumber();
String foot1 = "第 " + pageS + " 页 /共";
Phrase footer = new Phrase(foot1, fontDetail);
// 3.计算前半部分的foot1的长度,后面好定位最后一部分的'Y页'这俩字的x轴坐标,字体长度也要计算进去 = len
float len = bf.getWidthPoint(foot1, presentFontSize);
// 4.拿到当前的PdfContentByte
PdfContentByte cb = writer.getDirectContent();
// 5.写入页脚1,x轴就是(右margin+左margin + right() -left()- len)/2.0F
// 再给偏移20F适合人类视觉感受,否则肉眼看上去就太偏左了
// ,y轴就是底边界-20,否则就贴边重叠到数据体里了就不是页脚了;注意Y轴是从下往上累加的,最上方的Top值是大于Bottom好几百开外的。
ColumnText.showTextAligned(cb, Element.ALIGN_CENTER, footer,
(document.rightMargin() + document.right() + document.leftMargin() - document.left() - len) / 2.0F
+ 20F,
document.bottom() - 20, 0);
// 6.写入页脚2的模板(就是页脚的Y页这俩字)添加到文档中,计算模板的和Y轴,X=(右边界-左边界 - 前半部分的len值)/2.0F +
// len , y 轴和之前的保持一致,底边界-20
cb.addTemplate(total,
(document.rightMargin() + document.right() + document.leftMargin() - document.left()) / 2.0F + 20F,
document.bottom() - 20);
if(!waterMarkImgSrc.equals("")){
//增加水印图片
PdfContentByte canvas = writer.getDirectContentUnder();
Image image;
try {
image = Image.getInstance(waterMarkImgSrc);
image.scaleAbsolute(PageSize.A4.rotate());
image.setAbsolutePosition(0, 0);
canvas.addImage(image);
} catch (Exception e) {
e.printStackTrace();
}
}
}
public void onCloseDocument(PdfWriter writer, Document document) {
total.beginText();
total.setFontAndSize(bf, presentFontSize);// 生成的模版的字体、颜色
String foot2 = " " + (writer.getPageNumber() - 1) + " 页";
total.showText(foot2);// 模版显示的内容
total.endText();
total.closePath();
}
}