Java PDF操作总结
最近公司有个需求，要求根据数据动态生成PDF文件，然后再送往无纸化系统进行签章。现在公司的无纸化系统，只支持传递固定的pdf表单，当数据是一个长度不固定的列表时。PDF的表单就没发满足现有的需求。
通过模板引擎生成html，并将html转换为pdf文件
相关依赖：
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity</artifactId>
<version>1.7</version>
</dependency>
<!--html转换pdf，会自动引入itext2-->
<dependency>
<groupId>org.xhtmlrenderer</groupId>
<artifactId>core-renderer</artifactId>
<version>R8</version>
</dependency>
<dependency>
<groupId>com.lowagie</groupId>
<artifactId>itext</artifactId>
<version>2.0.8</version>
</dependency>PDF工具类：
import com.csii.pe.core.PeException;
import com.lowagie.text.DocumentException;
import com.lowagie.text.pdf.BaseFont;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;
import org.apache.velocity.app.VelocityEngine;
import org.apache.velocity.runtime.RuntimeConstants;
import org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xhtmlrenderer.pdf.ITextFontResolver;
import org.xhtmlrenderer.pdf.ITextRenderer;
import java.io.*;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class VelocityPdfUtils {
private static final Logger LOGGER = LoggerFactory.getLogger(VelocityPdfUtils.class);
private static final String FONT_FILE_PATH = "c:/Windows/Fonts/simsun.ttc"; // 字体文件可以拷贝出来放到相对路径下
private static final VelocityEngine VELOCITY_ENGINE;
static {
VELOCITY_ENGINE = new VelocityEngine();
VELOCITY_ENGINE.setProperty(RuntimeConstants.RESOURCE_LOADER, "classpath");
VELOCITY_ENGINE.setProperty("classpath.resource.loader.class", ClasspathResourceLoader.class.getName());
VELOCITY_ENGINE.setProperty(Velocity.INPUT_ENCODING, "UTF-8");
VELOCITY_ENGINE.setProperty(Velocity.OUTPUT_ENCODING, "UTF-8");
VELOCITY_ENGINE.init();
}
/**
* 使用Velocity模板引擎渲染模板文件
*
* @param templateFileName 模板文件
* @param data 渲染数据模型
* @return 渲染后的字符串结果
*/
public static String renderTemplateToString(String templateFileName, Map<String, Object> data) {
Template t = VELOCITY_ENGINE.getTemplate(templateFileName);
VelocityContext ctx = new VelocityContext();
ctx.put("data", data);
StringWriter sw = new StringWriter();
t.merge(ctx, sw);
return sw.toString();
}
/**
* 根据文档内容生成pdf文件
*
* @param documentContent 文档内容
* @param pdfPath 生成的pdf路径
* @param pdfName 生成的pdf文件名称
*/
public static void generatePDFFileFromDocumentToFileSystem(String documentContent, String pdfPath, String pdfName) throws PeException {
ITextRenderer renderer = new ITextRenderer();
// renderer.setDocument(new File(htmlFile).toURI().toString());
renderer.setDocumentFromString(documentContent);
ITextFontResolver fontResolver = renderer.getFontResolver();
try {
fontResolver.addFont(FONT_FILE_PATH, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
} catch (DocumentException e) {
LOGGER.error("文档处理失败", e);
throw new PeException(e);
} catch (IOException e) {
LOGGER.error("字体文件读取失败", e);
throw new PeException(e);
}
renderer.layout();
String pdfFile = pdfPath + pdfName;
LOGGER.info("准备创建PDF文件至{}", pdfPath);
try (OutputStream os = new FileOutputStream(new File(pdfFile));) {
renderer.createPDF(os);
renderer.finishPDF();
os.flush();
} catch (DocumentException | IOException e) {
LOGGER.error("PDF生成失败", e);
throw new PeException(e);
}
}
public static void main(String[] args) throws Exception {
String content = renderTemplateToString("/pdf/template/test.vm", new HashMap<String, Object>() {{
List list = new ArrayList();
for (int i = 0; i < 100; i++) {
list.add(new HashMap<String, Object>() {{
put("stdbillnum", "C101111111\n111111111");
put("stdpmmoney", "400,000.00");
put("acceptmoney", "204,000.00");
put("stdissdate", "2020-08-02");
put("stdduedate", "2020-08-02");
put("stdpyeenam", "啦啦啦德玛西亚公司");
put("stdpyeeacc", "79999999999999");
put("stdpyeebnm", "苏中农村商业\n银行同理支行");
}});
}
put("List", list);
}});
System.out.println(content);
generatePDFFileFromDocumentToFileSystem(content, "E:\\", "test1.pdf");
}
}模板文件：
<!DOCTYPE html>
<html>
<head>
<!-- @page 用于指定pdf的长和宽 -->
<style>
@page {
size: 500mm 200mm;
}
body {
font-family: SimSun;
text-align: center;
font-size: 10px;
}
table.gridtable {
font-size: 11px;
color: #333333;
border-width: 1px;
border-color: #666666;
border-collapse: collapse;
width: 96%;
table-layout: fixed;
}
table.gridtable th {
border-width: 1px;
padding: 8px;
border-style: solid;
border-color: #666666;
text-align: center;
font-weight: bold;
word-break: break-all;
word-wrap: break-word;
overflow:hidden;
width: 20px;
}
table.gridtable td {
border-width: 1px;
padding: 8px;
border-style: solid;
border-color: #666666;
background-color: #ffffff;
text-align: center;
word-break: break-all;
word-wrap: break-word;
overflow:hidden;
width: 20px;
}
</style>
<title></title>
</head>
<body>
<h1>承兑汇票清单</h1>
<table class="gridtable">
<tr>
<th>合同汇票号</th>
<th>金额</th>
<th>应交保证金额</th>
<th>出票日</th>
<th>承兑到期日</th>
<th>收款人名称</th>
<th>收款人账号</th>
<th>开户银行</th>
</tr>
#foreach($i in $data.List)
<tr>
<td>$data.List[0].stdbillnum</td>
<td>$data.List[0].stdpmmoney</td>
<td>$data.List[0].acceptmoney</td>
<td>$data.List[0].stdissdate</td>
<td>$data.List[0].stdduedate</td>
<td>$data.List[0].stdpyeenam</td>
<td>$data.List[0].stdpyeeacc</td>
<td>$data.List[0].stdpyeebnm</td>
</tr>
#end
</table>
</body>
</html>最后更新于
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