java生成PDF

雨点打透心脏的1/2处 2022-03-17 06:26 306阅读 0赞

不废话，直接上代码：

依赖jar包

<dependency>
       <groupId>com.itextpdf</groupId>
       <artifactId>itextpdf</artifactId>
       <version>5.5.11</version>
    </dependency>
    <dependency>
       <groupId>com.itextpdf.tool</groupId>
       <artifactId>xmlworker</artifactId>
       <version>5.5.12</version>
    </dependency>
    <dependency>
       <groupId>org.freemarker</groupId>
       <artifactId>freemarker</artifactId>
       <version>2.3.23</version>
    </dependency>

PdfUtils类：

package com.brank.practice.brankyang.utils;
    
    import com.itextpdf.text.Document;
    import com.itextpdf.text.pdf.PdfWriter;
    import com.itextpdf.tool.xml.XMLWorkerFontProvider;
    import com.itextpdf.tool.xml.XMLWorkerHelper;
    import freemarker.template.Configuration;
    import freemarker.template.Template;
    
    import java.io.*;
    import java.nio.charset.Charset;
    import java.util.HashMap;
    import java.util.Map;
    
    /**
     * @author yangbo
     * @version 1.0
     * Created 2019/2/22 17:45
     **/
    public class PdfUtils {
        private static final String FONT = "/sim-hei.ttf";//黑体字
        private static final String HTML = "/test.html";//模板html文件位置
        private static final String PDF="target/result.pdf";//目标pdf文件
        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) throws Exception{
            Map<String,String> data=new HashMap<String, String>();
            StringBuffer message=new StringBuffer();
            message.append("输入你想写的文字");
            data.put("message",message.toString());//
            String content=freeMarkerRender(data,HTML);//替换html中的参数
            Document document = new Document();
            PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(PDF));
            document.open();
            XMLWorkerFontProvider fontImp = new XMLWorkerFontProvider(XMLWorkerFontProvider.DONTLOOKFORFONTS);
            fontImp.register(FONT);
            XMLWorkerHelper.getInstance().parseXHtml(writer, document, new ByteArrayInputStream(content.getBytes()), null, Charset.forName("UTF-8"), fontImp);
            document.close();
        }
        private static String freeMarkerRender(Map<String,String> 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("UTF-8");
                // 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;
        }
    }

PathUtil类：

package com.brank.practice.brankyang.utils;
    
    import java.io.File;
    
    /**
     * @author yangbo
     * @version 1.0
     * Created 2019/2/22 16:26
     **/
    public class PathUtil {
        public static String getCurrentPath() {
    
            Class<?> caller = getCaller();
            if (caller == null) {
                caller = PathUtil.class;
            }
    
            return getCurrentPath(caller);
        }
    
    
        private static Class<?> getCaller() {
            StackTraceElement[] stack = (new Throwable()).getStackTrace();
            if (stack.length < 3) {
                return PathUtil.class;
            }
            String className = stack[2].getClassName();
            try {
                return Class.forName(className);
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            }
            return null;
        }
    
        /**
         * 获取当前路径
         * @param cls
         * @return
         */
        public static String getCurrentPath(Class<?> cls) {
            String path = cls.getProtectionDomain().getCodeSource().getLocation().getPath();
            path = path.replaceFirst("file:/", "");
            path = path.replaceAll("!/", "");
            if (path.lastIndexOf(File.separator) >= 0) {
                path = path.substring(0, path.lastIndexOf(File.separator));
            }
            if ("/".equalsIgnoreCase(path.substring(0, 1))) {
                String osName = System.getProperty("os.name").toLowerCase();
                if (osName.contains("window")) {
                    path = path.substring(1);
                }
            }
            return path;
        }
    }

test.html：

<!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8"/>
        <title>Title</title>
        <style>
            body{
                font-family:SimHei;
            }
            .blue{
                color: black;
            }
            .pos{
                position:absolute;
                left:100px;
                top:150px
            }
        </style>
    </head>
    <body>
          <center><H1>文件标题</H1></center>
          <br/>
          <div class="blue pos">
              <font size="6">你想说点啥吗: </font>${message}
          </div>
          <br/>
          <div>文件结尾。</div>
    
    </body>
    </html>

文件存放位置截图:

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbmdibzE5ODkx_size_16_color_FFFFFF_t_70][]

生成文件位置：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbmdibzE5ODkx_size_16_color_FFFFFF_t_70 1][]

效果图:

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbmdibzE5ODkx_size_16_color_FFFFFF_t_70 2][]

sim-hei.ttf文件见我的附件

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbmdibzE5ODkx_size_16_color_FFFFFF_t_70]: /images/20220317/245af553fe2c46b6a15f247269a2feda.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbmdibzE5ODkx_size_16_color_FFFFFF_t_70 1]: /images/20220317/f6d6f21f2a30453da42c5eb61a10a456.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbmdibzE5ODkx_size_16_color_FFFFFF_t_70 2]: /images/20220317/40c555f7840947b4b75ee3f999767261.png