[Java] 生成PDF文件-itextpdf-freeMarker

一、文本或HTML生成PDF文檔

package com.pdftest;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.PdfWriter;
import com.itextpdf.tool.xml.XMLWorkerHelper;

public class CrePdf {
	
	public static void main(String[] args) throws IOException,DocumentException {
		
				
//		String HTML=creHtml(htmlStr);
		
		Date date = new Date();
		DateFormat sdf=new SimpleDateFormat("MMddHHmmss");
		String stime=sdf.format(date);//用於生成文件名
		String filePdfPath="E:/abcd/Pdf"+stime+".pdf";//生成PDF文件的路徑
		String HTML="E:/abcd/reportHtml.html";//HTML文件路徑
		/*String imgPath1="file:/"+"E:/abcd/Koala.jpg";		
		Image img1=Image.getInstance(imgPath1);
		img1.scaleAbsolute(100, 100);
		img1.setAbsolutePosition(40, 310);*/
		
		Document document=new Document();
		PdfWriter writer=PdfWriter.getInstance(document, new FileOutputStream(filePdfPath));
		document.open();
		/*document.add(img1);*/
		XMLWorkerHelper.getInstance().parseXHtml(writer,document,
				new FileInputStream(HTML),null,new AsianFontProvider());
		
		document.close();
		System.out.println("輸出:E:/abcd/Result"+stime+".pdf");
	}
	//如果是文本，先生成Html文件，再轉爲PDF
	private static String creHtml(String strContext){
		String strs=strContext;		
		Date date = new Date();
		DateFormat sdf=new SimpleDateFormat("MMddHHmmss");
		String stime=sdf.format(date);
		String fileResPath="E:/abcd/Html"+stime+".html";		
		File filew=new File(fileResPath);
		try{
			FileWriter fw = new FileWriter(filew,true);
			BufferedWriter bufw=new BufferedWriter(fw);
			bufw.write(strs);
			bufw.close();
			fw.close();
		}
		catch(Exception e){
			e.printStackTrace();
		}
	
		return fileResPath;
	}

}

itextpdf對中文支持有問題，需要寫一個處理方法

import com.itextpdf.text.BaseColor;
import com.itextpdf.text.Font;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.tool.xml.XMLWorkerFontProvider;

public class AsianFontProvider extends XMLWorkerFontProvider {

	public Font getFont(final String fontname,final String encoding,
			final boolean embedded,final float size,final int style,
			final BaseColor color){
		BaseFont bf=null;
		try{
			bf=BaseFont.createFont("STSongStd-Light","UniGB-UCS2-H",BaseFont.NOT_EMBEDDED);
		}catch(Exception e){
			e.printStackTrace();
		}
		Font font=new Font(bf,size,style,color);
		font.setColor(color);
		return font;
	}

}

注：如果包含圖片，部分html中src路徑可用。如存在問題，可用代碼中註釋的部分解決。getInstance爲文件路徑方法，scaleAbsolute爲圖片大小方法，setAbsolutePosition爲插入圖片位置的方法，可自己多調幾次到合適的位置。

二、FreeMarker模板+itextpdf

freeMarker的使用與Jsp有些類似。

public String freeMarkUtil(RiskControlApproveBean bean) throws IOException, TemplateException, DocumentException{
		//文件名
		Date date = new Date();
		DateFormat sdf=new SimpleDateFormat("yyyyMMddHHmmssSSS");
		DateFormat sdf24=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");		
		String stime24=sdf24.format(date);
		int rad=(int) ((Math.random()*9+1)*100);
		String stime=sdf.format(date)+rad;
		
		Configuration conf=new Configuration();
		String dir="E:/abcd/ftl";
		String eDir="E:/abcd/";
		conf.setDirectoryForTemplateLoading(new File(dir));
		Template template=conf.getTemplate("examplePage.html");
		Writer out=new FileWriter(new File(eDir+stime+".html"));
		Map<String,Object> root=new HashMap<String,Object>();
		
		//插入模板的Bean
		CusInfoBean cusInfoBean = dao.getCusBaseInfo(bean);
		root.put("cusInfoBean",cusInfoBean);
			
		template.process(root, out);
		out.flush();
		out.close();
		
		crePdf(stime);		
		jsonResponse.setSuccess(stime);
		return null;
	}
	
public static void crePdf(String htmlFileStr) throws IOException,DocumentException{
		String HTML="E:/abcd/"+htmlFileStr+".html";				
		String filePdfPath="E:/abcd/"+htmlFileStr+".pdf";
		
		Document document=new Document();
		PdfWriter writer=PdfWriter.getInstance(document, new FileOutputStream(filePdfPath));
		document.open();
		XMLWorkerHelper.getInstance().parseXHtml(writer,document,new FileInputStream(HTML),null,new AsianFontProvider());
		document.close();
		System.out.println("輸出:"+filePdfPath);
	}	

Html模板：

<tr>
<td>姓名</td>
<td>${cusInfoBean.name}</td>
<td>性別</td>
<td>${cusInfoBean.sex}</td>
</tr>