使用freemarker和itext把html转pdf

1.把html转pdf，首先必须要解决中文显示问题，CSS样式问题以及可能的JS问题，先上例子，自己去体会。

2.先去下载simsun.ttc字体；

2.demo.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF8"/>
    <title>Title</title>
    <style>
        .color {
            color: green;
        }

        .pos {
            position: absolute;
            left: 200px;
            top: 5px;
            width: 200px;
            fontsize: 10px;
        }
    </style>
</head>
<body style="font-family: SimSun">
    <img src="logo.png" width="600px" />
    <div class="color pos">
        hello,${name};
    </div>
</body>
</html>

3.java实现转换代码

package com.ra.truck.createpdf;

import com.itextpdf.text.pdf.BaseFont;
import com.lowagie.text.*;
import com.lowagie.text.Font;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.PdfWriter;
import freemarker.template.Configuration;
import freemarker.template.Template;
import org.xhtmlrenderer.pdf.ITextFontResolver;
import org.xhtmlrenderer.pdf.ITextRenderer;

import java.awt.*;
import java.io.*;
import java.util.HashMap;
import java.util.Map;

/**
 * @Auther: lanhao
 * @Date: 2018/8/7 11:46
 * @Description:
 */
public class JavaToPdfHtmlFreeMarkerFS {
    private static final String DEST ="../HelloWorld_CN_HTML_FREEMARKER_FS_index.pdf";
    private static final String HTML = "demo.html";
    private static final String FONT = "simsun.ttc";private static final String LOGO_PATH ="file:/"+PathUtil.getCurrentPath()+"/"+"demo448"+".png";
    private static Configuration freemarkerCfg=null;
    static {
        freemarkerCfg =new Configuration();
        //freemarker的模板目录
        try {
            freemarkerCfg.setDirectoryForTemplateLoading(new File(PathUtil.getCurrentPath()));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    public static void main(String[] args){
        String os=System.getProperty("os.name");
        System.out.println(os);
        Map<String,Object> data = new HashMap<>();
        data.put("name","lan浩");
        String content =freeMarkerRender(data,HTML);
        createPdf(content,DEST);
    }

    /**
     * freemarker渲染html
     */
    public static String freeMarkerRender(Map<String, Object> data,String htmlTmp) {
        Writer out = new StringWriter();
        try {
            // 获取模板,并设置编码方式
            Template template = freemarkerCfg.getTemplate(htmlTmp);
            template.setEncoding("UTF8");
            // 合并数据模型与模板
            template.process(data, out); //将合并后的数据和模板写入到流中，这里使用的字符流
            out.flush();
            return out.toString();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                out.close();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return null;
    }

    private static void createPdf(String content,String dest) {
        try {
            ITextRenderer render = new ITextRenderer();
            //解决中文不显式问题
            ITextFontResolver fontResolver = render.getFontResolver();
            fontResolver.addFont(FONT,BaseFont.IDENTITY_H,BaseFont.NOT_EMBEDDED);
            // 解析html生成pdf
            render.setDocumentFromString(content);
            //解决图片相对路径的问题
            render.getSharedContext().setBaseURL(LOGO_PATH);
            render.layout();
            render.createPDF(new FileOutputStream(dest));
        }catch (Exception e) {
            e.printStackTrace();
        }
    }
}

注：引用的文件全部放在项目的resource根目录下

posted @ 2018-08-17 11:56 懒惰虫阅读(3054) 评论(0) 编辑收藏举报

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