IText7将html转换为pdf
🧀相关须知
- 本文使用自建简单html5进行转换pdf测试,html非模板引擎生成
- 相关字体文件使用Windows下微软黑体字体文件,本文使用字体文件来自Windows系统自带字体文件,路径:C:\Windows\Fonts\微软雅黑
- 相关pom依赖
<!-- lombok工具 在父级pom 进行全局引入 --> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.24</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>1.18.24</version> </dependency> <!--html转pdf工具 itext7 html2pdf --> <dependency> <groupId>com.itextpdf</groupId> <artifactId>html2pdf</artifactId> <version>3.0.5</version> </dependency>
一、实现pdf工具类
package cn.cxyfyf.base.test.pdf.itext.config;
import cn.cxyfyf.base.framework.utils.IdUtils;
import com.itextpdf.html2pdf.ConverterProperties;
import com.itextpdf.html2pdf.HtmlConverter;
import com.itextpdf.io.font.PdfEncodings;
import com.itextpdf.kernel.events.PdfDocumentEvent;
import com.itextpdf.kernel.font.PdfFont;
import com.itextpdf.kernel.geom.PageSize;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.font.FontProvider;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.collections4.CollectionUtils;
import org.apache.commons.lang3.StringUtils;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Itext7转换pdf工具类
*/
@Slf4j
public class PdfUtils {
// 字体文件路径
private static final String fontPath = "C:\\Users\\86185\\Desktop\\html-pdf\\front\\msyh.ttc,0";
// 字体文件 列表
private static final Set<String> fontSet = new HashSet<>();
static {
fontSet.add(fontPath);
}
/**
* 浏览器响应pdf
* @param response 浏览器响应
* @param htmlStr html字符串
* @param name 文件名 为空使用UUID
* @param isOpen true浏览器直接打开,false浏览器附件形式下载
*/
public static void downloadPdf(HttpServletResponse response, String htmlStr, String name, boolean isOpen) {
if (StringUtils.isBlank(htmlStr)) htmlStr = "";
downloadPdf(response, new ByteArrayInputStream(htmlStr.getBytes(StandardCharsets.UTF_8)), name, isOpen);
}
/**
* 浏览器响应pdf
* @param response 浏览器响应
* @param inputStream 输入流
* @param name 文件名 为空使用UUID
*/
@SneakyThrows
public static void downloadPdf(HttpServletResponse response, InputStream inputStream, String name, boolean isOpen) {
Objects.requireNonNull(response);
String suffix = ".pdf";
// 文件名 为空使用UUID
if (StringUtils.isBlank(name)) name = IdUtils.simpleUUID();
// 设置响应文件类型
response.setContentType(Files.probeContentType(Path.of(suffix)));
// 设置编码UTF_8
response.setCharacterEncoding(StandardCharsets.UTF_8.name());
// 文件名转ISO_8859_1,不然会乱码
String filename = new String(name.getBytes(StandardCharsets.UTF_8), StandardCharsets.ISO_8859_1);
// 若文件不存在后缀,拼接后缀名
if (!filename.contains(suffix)) {
filename+=suffix;
}
// 设置浏览器附件形式下载
if (!isOpen) {
response.setHeader("Content-Disposition","attachment;filename=" + filename);
}
// 转换pdf数据
PdfUtils.convertHtmlToPdf(inputStream, PageSize.A4, response.getOutputStream());
response.flushBuffer();
}
/**
* html转 pdf 默认A4纸张
* @param inputStream 输入流
* @param outputStream 输出流
*/
public static void convertHtmlToPdf(InputStream inputStream, OutputStream outputStream) {
convertHtmlToPdf(inputStream, "", "", PageSize.Default, fontSet, outputStream);
}
/**
* html转 pdf 默认A4纸张
* @param htmlStr html 字符串文本
* @param outputStream 输出流
*/
public static void convertHtmlToPdf(String htmlStr, OutputStream outputStream) {
convertHtmlToPdf(new ByteArrayInputStream(htmlStr.getBytes(StandardCharsets.UTF_8)), "", "", PageSize.Default, fontSet, outputStream);
}
/**
* html转 pdf
* @param htmlStr html 字符串文本
* @param pageSize 纸张大小
* @param outputStream 输出流
*/
public static void convertHtmlToPdf(String htmlStr, PageSize pageSize, OutputStream outputStream) {
convertHtmlToPdf(new ByteArrayInputStream(htmlStr.getBytes(StandardCharsets.UTF_8)), "", "", pageSize, fontSet, outputStream);
}
/**
* html转 pdf
* @param inputStream 输入流
* @param pageSize 纸张大小
* @param outputStream 输出流
*/
public static void convertHtmlToPdf(InputStream inputStream, PageSize pageSize, OutputStream outputStream) {
convertHtmlToPdf(inputStream, "", "", pageSize, fontSet, outputStream);
}
/**
* html转 pdf
* @param inputStream 输入流
* @param headerText 页眉
* @param waterMark 水印
* @param pageSize 纸张大小
* @param fontPathList 字体路径列表,ttc后缀的字体需要添加<b>,0<b/> 例:C:\front\msyh.ttc,0
* @param outputStream 输出流
*/
public static void convertHtmlToPdf(InputStream inputStream, String headerText, String waterMark, PageSize pageSize,
Set<String> fontPathList, OutputStream outputStream) {
// 验空
Objects.requireNonNull(inputStream);
Objects.requireNonNull(outputStream);
PdfWriter pdfWriter = new PdfWriter(outputStream);
PdfDocument pdfDocument = new PdfDocument(pdfWriter);
//设置纸张大小
pdfDocument.setDefaultPageSize(pageSize);
//添加中文字体支持
ConverterProperties properties = new ConverterProperties();
FontProvider fontProvider = new FontProvider();
//添加自定义字体,例如微软雅黑
if (CollectionUtils.isNotEmpty(fontPathList)) {
fontPathList.forEach(e -> fontProvider.addFont(e, PdfEncodings.IDENTITY_H));
}
PdfFont pdfFont = fontProvider.getFontSet()
.getFonts()
.stream()
.findFirst()
.map(fontProvider::getPdfFont)
.orElse(null);
// 添加页眉
pdfDocument.addEventHandler(PdfDocumentEvent.START_PAGE, new PdfHeaderMarkerEventHandler(pdfFont, headerText));
// 添加水印
pdfDocument.addEventHandler(PdfDocumentEvent.INSERT_PAGE, new PdfWaterMarkEventHandler(pdfFont, waterMark));
// 添加页脚
pdfDocument.addEventHandler(PdfDocumentEvent.END_PAGE, new PdfPageMarkerEventHandler(pdfFont));
properties.setFontProvider(fontProvider);
// 读取Html文件流,查找出当中的 或出现类似的符号空格字符
inputStream = readInputStrem(inputStream);
try {
// 生成pdf文档
HtmlConverter.convertToPdf(inputStream, pdfDocument, properties);
} catch (IOException e) {
e.printStackTrace();
log.error("错误信息:pdf转换失败{}", e.getMessage());
} finally {
try {
pdfWriter.close();
} catch (IOException e) {
e.printStackTrace();
}
pdfDocument.close();
}
}
/**
* 读取HTML 流文件,并查询当中的 或类似符号直接替换为空格
*
* @param inputStream 输入流
* @return 去掉特殊标记的输入流
*/
private static InputStream readInputStrem(InputStream inputStream) {
// 定义一些特殊字符的正则表达式 如:
String regEx_special = "\\&[a-zA-Z]{1,10};";
try(ByteArrayOutputStream baos = new ByteArrayOutputStream();) {
// 创建缓存大小
byte[] buffer = new byte[1024]; // 1KB
// 每次读取到内容的长度
int len = -1;
// 开始读取输入流中的内容
while ((len = inputStream.read(buffer)) != -1) { //当等于-1说明没有数据可以读取了
baos.write(buffer, 0, len); //把读取到的内容写到输出流中
}
// 把字节数组转换为字符串 设置utf-8字符编码
String content = baos.toString(StandardCharsets.UTF_8);
// 关闭输入流和输出流
inputStream.close();
// 判断HTML内容是否具有HTML的特殊字符标记
Pattern compile = Pattern.compile(regEx_special, Pattern.CASE_INSENSITIVE);
Matcher matcher = compile.matcher(content);
String replaceAll = matcher.replaceAll("");
// 将字符串转化为输入流返回
return getStringStream(replaceAll);
} catch (Exception e) {
e.printStackTrace();
log.error("错误信息:pdf字符串格式化特殊字符失败{}", e.getMessage());
return null;
}
}
/**
* 将一个字符串转化为输入流
* @param sInputString 字符串
* @return 字符串对应的输入流
*/
public static InputStream getStringStream(String sInputString) {
if (sInputString != null && !sInputString.trim().equals("")) {
try {
return new ByteArrayInputStream(sInputString.getBytes(StandardCharsets.UTF_8)); // 设置utf-8字符编码
} catch (Exception e) {
e.printStackTrace();
log.error("错误信息:pdf字符串转输入流失败,{}", e.getMessage());
}
}
return null;
}
}
二、页眉、页脚、水印实现类
页眉
页眉通常用来显示公司等标志性信息
package cn.cxyfyf.base.test.pdf.itext.config;
import com.itextpdf.kernel.events.Event;
import com.itextpdf.kernel.events.IEventHandler;
import com.itextpdf.kernel.events.PdfDocumentEvent;
import com.itextpdf.kernel.font.PdfFont;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfPage;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.layout.Canvas;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.property.TextAlignment;
import org.apache.commons.lang3.StringUtils;
/**
* 页眉实现类
*/
public class PdfHeaderMarkerEventHandler implements IEventHandler {
/**
* pdf字体
*/
private final PdfFont pdfFont;
/**
* 页眉显示
*/
private final String title;
public PdfHeaderMarkerEventHandler(PdfFont pdfFont, String title) {
this.pdfFont = pdfFont;
this.title = title;
}
@Override
public void handleEvent(Event event) {
if (StringUtils.isEmpty(title)) return;
PdfDocumentEvent docEvent = (PdfDocumentEvent) event;
PdfDocument pdf = docEvent.getDocument();
PdfPage page = docEvent.getPage();
Rectangle pageSize = page.getPageSize();
PdfCanvas pdfCanvas = new PdfCanvas(page.getLastContentStream(), page.getResources(), pdf);
Canvas canvas = new Canvas(pdfCanvas, pageSize);
float x = (pageSize.getLeft() + pageSize.getRight()) / 2;
float y = pageSize.getTop() - 25;
Paragraph p = new Paragraph(title)
.setFontSize(12)
.setFont(pdfFont);
// 显示在顶部中间位置
canvas.showTextAligned(p, x, y, TextAlignment.CENTER);
canvas.close();
}
}
页脚
页脚通常用来显示页码
package cn.cxyfyf.base.test.pdf.itext.config;
import com.itextpdf.kernel.events.Event;
import com.itextpdf.kernel.events.IEventHandler;
import com.itextpdf.kernel.events.PdfDocumentEvent;
import com.itextpdf.kernel.font.PdfFont;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfPage;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.layout.Canvas;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.property.TextAlignment;
/**
* 页脚(页码)实现类
*/
public class PdfPageMarkerEventHandler implements IEventHandler {
/**
* pdf字体
*/
private final PdfFont pdfFont;
public PdfPageMarkerEventHandler(PdfFont pdfFont) {
this.pdfFont = pdfFont;
}
@Override
public void handleEvent(Event event) {
PdfDocumentEvent docEvent = (PdfDocumentEvent) event;
PdfDocument pdf = docEvent.getDocument();
PdfPage page = docEvent.getPage();
int pageNumber = pdf.getPageNumber(page);
Rectangle pageSize = page.getPageSize();
PdfCanvas pdfCanvas = new PdfCanvas(page.getLastContentStream(), page.getResources(), pdf);
Canvas canvas = new Canvas(pdfCanvas, pageSize);
float x = (pageSize.getLeft() + pageSize.getRight()) / 2;
float y = pageSize.getBottom() + 15;
Paragraph p = new Paragraph("第" + pageNumber + "页")
.setFontSize(12)
.setFont(pdfFont);
// 绘制到底部中间位置
canvas.showTextAligned(p, x, y, TextAlignment.CENTER);
canvas.close();
}
}
水印
水印实现类,具体显示效果可以自行改造
package cn.cxyfyf.base.test.pdf.itext.config;
import com.itextpdf.kernel.colors.WebColors;
import com.itextpdf.kernel.events.Event;
import com.itextpdf.kernel.events.IEventHandler;
import com.itextpdf.kernel.events.PdfDocumentEvent;
import com.itextpdf.kernel.font.PdfFont;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfPage;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.layout.Canvas;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.property.TextAlignment;
import com.itextpdf.layout.property.VerticalAlignment;
import org.apache.commons.lang3.StringUtils;
/**
* pdf水印
*/
public class PdfWaterMarkEventHandler implements IEventHandler {
/**
* 水印内容
*/
private final String waterMarkContent;
/**
* 一页中有几行水印
*/
private final int waterMarkX;
/**
* 一页中每列有多少水印
*/
private final int waterMarkY;
/**
* Pdf字体
*/
private final PdfFont pdfFont;
/**
* 默认水印效果5行5列
* @param pdfFont pdf字体
* @param waterMarkContent 水印内容
*/
public PdfWaterMarkEventHandler(PdfFont pdfFont, String waterMarkContent) {
this(pdfFont, waterMarkContent, 5, 5);
}
/**
* 水印效果
*
* @param pdfFont pdf字体
* @param waterMarkContent 水印内容
* @param waterMarkX 一页中有多少行水印
* @param waterMarkY 一页中有多少列水印
*/
public PdfWaterMarkEventHandler(PdfFont pdfFont, String waterMarkContent, int waterMarkX, int waterMarkY) {
this.waterMarkContent = waterMarkContent;
this.waterMarkX = waterMarkX;
this.waterMarkY = waterMarkY;
this.pdfFont = pdfFont;
}
@Override
public void handleEvent(Event event) {
if (StringUtils.isEmpty(waterMarkContent)) return;
// 获取pdf对象、页面属性
PdfDocumentEvent documentEvent = (PdfDocumentEvent) event;
PdfDocument document = documentEvent.getDocument();
PdfPage page = documentEvent.getPage();
Rectangle pageSize = page.getPageSize();
// 设置画布属性、水印属性
PdfCanvas pdfCanvas = new PdfCanvas(page.newContentStreamAfter(), page.getResources(), document);
Paragraph waterMark = new Paragraph(waterMarkContent).setOpacity(0.5f);
Canvas canvas = new Canvas(pdfCanvas, pageSize)
.setFontColor(WebColors.getRGBColor("lightgray")) // 水印颜色效果
.setFontSize(16)
.setFont(pdfFont);
float y = pageSize.getHeight(); // 页面高度
float x = pageSize.getWidth(); // 页面宽度
// 根据行列进行绘制
for (int i = 0; i < waterMarkX; i++) {
float width = (x / waterMarkX) * i + 50;
for (int j = waterMarkY; j > 0; j--) {
float height = (y / waterMarkY) * j - 50;
// System.out.println("waterMarkX: "+width+" waterMarkY: "+height);
canvas.showTextAligned(waterMark, width, height, document.getNumberOfPages(), TextAlignment.CENTER, VerticalAlignment.MIDDLE, 120);
}
}
canvas.close();
}
}
水印(图片)
图片水印和固定文字位置水印效果
package cn.cxyfyf.base.test.pdf.itext.config;
import com.itextpdf.io.image.ImageData;
import com.itextpdf.io.image.ImageDataFactory;
import com.itextpdf.kernel.events.Event;
import com.itextpdf.kernel.events.IEventHandler;
import com.itextpdf.kernel.events.PdfDocumentEvent;
import com.itextpdf.kernel.font.PdfFont;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfPage;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.layout.Canvas;
import com.itextpdf.layout.element.Image;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.property.TextAlignment;
import com.itextpdf.layout.property.VerticalAlignment;
import org.apache.commons.lang3.StringUtils;
import org.springframework.core.io.ClassPathResource;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
/**
* 添加图片水印
*/
public class PdfWaterMarker implements IEventHandler {
private final PdfFont pdfFont;
private final String waterContent;
private final String waterImgPath;
public PdfWaterMarker(PdfFont pdfFont, String waterContent, String waterImgPath) {
this.pdfFont = pdfFont;
this.waterContent = waterContent;
this.waterImgPath = waterImgPath;
}
@Override
public void handleEvent(Event event) {
PdfDocumentEvent docEvent = (PdfDocumentEvent) event;
PdfDocument pdf = docEvent.getDocument();
PdfPage page = docEvent.getPage();
Rectangle pageSize = page.getPageSize();
PdfCanvas pdfCanvas = new PdfCanvas(page.getLastContentStream(), page.getResources(), pdf);
Canvas canvas = new Canvas(pdfCanvas, pageSize);
Paragraph waterMarker = new Paragraph(waterContent)
.setFont(pdfFont)
.setOpacity(.5f)
.setFontSize(13);
// 右下角位置
canvas.showTextAligned(waterMarker, pageSize.getRight() - 150, pageSize.getBottom() + 15, pdf.getNumberOfPages(), TextAlignment.LEFT, VerticalAlignment.BOTTOM, 0);
// 水印图片
Image waterImg = null;
if (StringUtils.isNotBlank(waterImgPath)) {
try {
InputStream inputStream = returnInputStream(waterImgPath);
ImageData waterImgData = ImageDataFactory.create(toByteArray(inputStream));
waterImg = new Image(waterImgData);
} catch (IOException e) {
e.printStackTrace();
}
}
// 图片水印
if (waterImg != null) {
int length = waterContent.length();
// 设置坐标 X Y
waterImg.setFixedPosition(pdf.getNumberOfPages(), pageSize.getRight() - (168 + length), pageSize.getBottom() + 12);
// 设置等比缩放
waterImg.scaleAbsolute(20, 20);// 自定义大小
// 写入图片水印
canvas.add(waterImg);
}
canvas.close();
}
public static byte[] toByteArray(InputStream input) throws IOException {
ByteArrayOutputStream output = new ByteArrayOutputStream();
byte[] buffer = new byte[4096];
int n = 0;
while (-1 != (n = input.read(buffer))) {
output.write(buffer, 0, n);
}
return output.toByteArray();
}
public static InputStream returnInputStream(String filePath) throws IOException {
return new ClassPathResource(filePath).getInputStream();
}
}
三、测试类
package cn.cxyfyf.base.test.pdf.itext;
import cn.cxyfyf.base.test.pdf.itext.config.SignUtils;
import lombok.extern.slf4j.Slf4j;
import java.io.*;
@Slf4j
public class Test {
public static void main(String[] args) throws IOException {
long startTime = System.currentTimeMillis();
// html文件所在绝对路径
String htmlFile = "C:\\Users\\86185\\Desktop\\html-pdf\\ceshi.html";
// pdf文件存储绝对路径
String pdfFile = "C:\\Users\\86185\\Desktop\\html-pdf\\ceshi.pdf";
try(InputStream inputStream = new FileInputStream(htmlFile);OutputStream singOutputStream = new FileOutputStream(pdfFile);) {
PdfUtils.convertHtmlToPdf(inputStream, outputStream);
}
log.info("转换结束,耗时:{}ms",System.currentTimeMillis()-startTime);
}
}
浏览器下载方式
package cn.cxyfyf.base.controller.sys;
import cn.cxyfyf.base.framework.utils.IdUtils;
import cn.cxyfyf.base.test.pdf.itext.PdfUtils;
import com.itextpdf.kernel.geom.PageSize;
import lombok.RequiredArgsConstructor;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.servlet.http.HttpServletResponse;
import java.io.FileInputStream;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Map;
/**
* test Controller
*
* @author fyf
* @date 2022-11-01
*/
@Slf4j
@RestController
@RequiredArgsConstructor
@RequestMapping("/test")
public class TestController {
/**
* 导出pdf
*/
@SneakyThrows
@PostMapping("/downloadPdf")
public void downloadPdf(HttpServletResponse response, @RequestBody Map<String, Object> map){
// html文件所在绝对路径
String htmlFile = "C:\\Users\\86185\\Desktop\\html-pdf\\ceshi.html";
PdfUtils.downloadPdf(response, new FileInputStream(htmlFile), "小和系统", false);
}
}
使用Freemarker模板引擎生成html字符串
需要引入依赖:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
<version>2.6.1</version>
</dependency>
需要在项目resource目录下创建templates目录,并创建template.html文件
template.html源码
<html>
<head>
<style>
.center_div {
border: 1px solid #404e94;
margin-left: auto;
margin-right: auto;
background-color: #f6d0ed;
text-align: left;
padding: 8px;
}
table {
width: 100%;
border: 1px solid black;
}
th, td {
border: 1px solid black;
}
body,html,input{font-family:"msyh";}
</style>
</head>
<body>
<div class="center_div">
<h1>Hello java North!</h1>
<div>
<p>convert html to pdf.</p>
</div>
<img src="https://www.baidu.com/img/flexible/logo/pc/result.png">
<div>
<table style="repeat-header:yes;repeat-footer:yes;">
<thead>
<th>${bt1}</th>
<th>${bt2}</th>
<th>${bt3}</th>
</thead>
<tbody>
<#list list as item>
<tr>
<td>${item.name}</td>
<td>${item.sex}</td>
<td>${item.age}</td>
</tr>
</#list>
</tbody>
<tfoot>
<th>表尾1</th>
<th>表尾2</th>
<th>表尾3</th>
</tfoot>
</table>
</div>
</div>
</body>
</html>
工具类
package cn.cxyfyf.base.test.pdf.itext.config;
import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.TemplateException;
import freemarker.template.TemplateExceptionHandler;
import lombok.SneakyThrows;
import org.springframework.core.io.ClassPathResource;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.util.Map;
/**
* html模板工具类
*/
public class FreemarkerUtils {
private FreemarkerUtils() {
}
private volatile static Configuration configuration;
private final static String path = "/templates/";
static {
if (configuration == null) {
synchronized (FreemarkerUtils.class) {
if (configuration == null) {
configuration = new Configuration(Configuration.VERSION_2_3_28);
}
}
}
}
/**
* freemarker 通过流的方式 引擎渲染 html
*
* @param templateName html 模板文件相对路径(相对于 resources路径,路径 + 文件名),之后通过 BufferedReader 流来读取模板 "templates/template.html"
* @param dataMap 传入 html 模板的 Map 数据
* @return 渲染后的html字符串
*/
public static String getTemplateStr(String templateName, Map<String, Object> dataMap) {
// 初始化Configuration
configuration.setDefaultEncoding("UTF-8");
configuration.setTemplateExceptionHandler(TemplateExceptionHandler.RETHROW_HANDLER);
configuration.setLogTemplateExceptions(false);
configuration.setWrapUncheckedExceptions(true);
try(Writer out = new StringWriter();) {
// 获取模板对象
Template template = new Template("", getReaderStream(path + templateName), configuration);
// 渲染模板
template.process(dataMap, out);
out.flush();
return out.toString();
} catch (IOException | TemplateException e) {
e.printStackTrace();
}
return "";
}
/**
* 根据文件相对路径返回一个 BufferedReader 流
*
* @param filePath 项目resource目录下文件路径
* @return BufferedReader
*/
@SneakyThrows
public static BufferedReader getReaderStream(String filePath) {
return new BufferedReader(new InputStreamReader(new ClassPathResource(filePath).getInputStream(), StandardCharsets.UTF_8));
}
}
根据参数渲染模板界面示例:
package cn.cxyfyf.base.test.pdf.itext;
import cn.cxyfyf.base.test.pdf.itext.config.FreemarkerUtils;
import cn.cxyfyf.base.test.pdf.itext.config.PdfUtils;
import com.google.common.collect.ImmutableMap;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
* 描述
* 渲染模板界面示例
* @author fyf
* Create by 2023/2/3 16:39
*/
public class TemplateTest {
public static void main(String[] args) {
// 制造假数据
List<Map<String, Object>> list = new ArrayList<>();
for (int i = 0; i < 50; i++) {
list.add(ImmutableMap.of("name", "小明" + i, "sex", i%2==0?"男":"女", "age", 10 + i));
}
Map<String, Object> map = ImmutableMap.of("bt1", "表头1", "bt2", "表头2", "bt3", "表头3", "list", list);
// 渲染模板
String template = FreemarkerUtils.getTemplateStr("template.html", map);
// 导出文件的路径
String outFilePath = "C:/Users/86185/Desktop/html-pdf/template2.pdf";
try(OutputStream outputStream = new FileOutputStream(outFilePath)) {
PdfUtils.convertHtmlToPdf(template, outputStream);
} catch (IOException e) {
e.printStackTrace();
}
}
}
HTML自建文件(表头、表尾控制)
注意表头表尾的控制取决于style样式跟标签
如下文:
table标签内需要有以下样式:
repeat-header:yes代表表头重复
repeat-footer:yes代表表尾重复
style="repeat-header:yes;repeat-footer:yes;"
表头对应标签thead,表尾对应标签tfoot
HTML文件源码
<html>
<head>
<style>
.center_div {
border: 1px solid #404e94;
margin-left: auto;
margin-right: auto;
background-color: #f6d0ed;
text-align: left;
padding: 8px;
}
table {
width: 100%;
border: 1px solid black;
}
th, td {
border: 1px solid black;
}
body,html,input{font-family:"msyh";}
</style>
</head>
<body>
<div class="center_div">
<h1>Hello java North!</h1>
<div>
<p>convert html to pdf.</p>
</div>
<img src="https://www.baidu.com/img/flexible/logo/pc/result.png">
<div>
<table style="repeat-header:yes;repeat-footer:yes;">
<thead>
<th>ROLE</th>
<th>NAME</th>
<th>TITLE</th>
</thead>
<tbody>
<tr>
<td>MARKSMAN</td>
<td>ASHE</td>
<td>THE FROST ARCHER</td>
</tr>
<tr>
<td>MAGES</td>
<td>ANNIE</td>
<td>THE DARK CHILD</td>
</tr>
<tr>
<td>射手</td>
<td>凯特琳</td>
<td>皮城女警</td>
</tr>
<tr>
<td>MARKSMAN</td>
<td>ASHE</td>
<td>THE FROST ARCHER</td>
</tr>
<tr>
<td>MAGES</td>
<td>ANNIE</td>
<td>THE DARK CHILD</td>
</tr>
<tr>
<td>射手</td>
<td>凯特琳</td>
<td>皮城女警</td>
</tr>
<tr>
<td>MARKSMAN</td>
<td>ASHE</td>
<td>THE FROST ARCHER</td>
</tr>
<tr>
<td>MAGES</td>
<td>ANNIE</td>
<td>THE DARK CHILD</td>
</tr>
<tr>
<td>射手</td>
<td>凯特琳</td>
<td>皮城女警</td>
</tr>
<tr>
<td>MARKSMAN</td>
<td>ASHE</td>
<td>THE FROST ARCHER</td>
</tr>
<tr>
<td>MAGES</td>
<td>ANNIE</td>
<td>THE DARK CHILD</td>
</tr>
<tr>
<td>射手</td>
<td>凯特琳</td>
<td>皮城女警</td>
</tr>
<tr>
<td>MARKSMAN</td>
<td>ASHE</td>
<td>THE FROST ARCHER</td>
</tr>
<tr>
<td>MAGES</td>
<td>ANNIE</td>
<td>THE DARK CHILD</td>
</tr>
<tr>
<td>射手</td>
<td>凯特琳</td>
<td>皮城女警</td>
</tr><tr>
<td>MARKSMAN</td>
<td>ASHE</td>
<td>THE FROST ARCHER</td>
</tr>
<tr>
<td>MAGES</td>
<td>ANNIE</td>
<td>THE DARK CHILD</td>
</tr>
<tr>
<td>射手</td>
<td>凯特琳</td>
<td>皮城女警</td>
</tr>
<tr>
<td>MARKSMAN</td>
<td>ASHE</td>
<td>THE FROST ARCHER</td>
</tr>
<tr>
<td>MAGES</td>
<td>ANNIE</td>
<td>THE DARK CHILD</td>
</tr>
<tr>
<td>射手</td>
<td>凯特琳</td>
<td>皮城女警</td>
</tr>
<tr>
<td>MARKSMAN</td>
<td>ASHE</td>
<td>THE FROST ARCHER</td>
</tr>
<tr>
<td>MAGES</td>
<td>ANNIE</td>
<td>THE DARK CHILD</td>
</tr>
<tr>
<td>射手</td>
<td>凯特琳</td>
<td>皮城女警</td>
</tr>
<tr>
<td>MARKSMAN</td>
<td>ASHE</td>
<td>THE FROST ARCHER</td>
</tr>
<tr>
<td>MAGES</td>
<td>ANNIE</td>
<td>THE DARK CHILD</td>
</tr>
<tr>
<td>射手</td>
<td>凯特琳</td>
<td>皮城女警</td>
</tr>
<tr>
<td>MARKSMAN</td>
<td>ASHE</td>
<td>THE FROST ARCHER</td>
</tr>
<tr>
<td>MAGES</td>
<td>ANNIE</td>
<td>THE DARK CHILD</td>
</tr>
<tr>
<td>射手</td>
<td>凯特琳</td>
<td>皮城女警</td>
</tr><tr>
<td>MARKSMAN</td>
<td>ASHE</td>
<td>THE FROST ARCHER</td>
</tr>
<tr>
<td>MAGES</td>
<td>ANNIE</td>
<td>THE DARK CHILD</td>
</tr>
<tr>
<td>射手</td>
<td>凯特琳</td>
<td>皮城女警</td>
</tr><tr>
<td>MARKSMAN</td>
<td>ASHE</td>
<td>THE FROST ARCHER</td>
</tr>
<tr>
<td>MAGES</td>
<td>ANNIE</td>
<td>THE DARK CHILD</td>
</tr>
<tr>
<td>射手</td>
<td>凯特琳</td>
<td>皮城女警</td>
</tr><tr>
<td>MARKSMAN</td>
<td>ASHE</td>
<td>THE FROST ARCHER</td>
</tr>
<tr>
<td>MAGES</td>
<td>ANNIE</td>
<td>THE DARK CHILD</td>
</tr>
<tr>
<td>射手</td>
<td>凯特琳</td>
<td>皮城女警</td>
</tr>
<tr>
<td>MARKSMAN</td>
<td>ASHE</td>
<td>THE FROST ARCHER</td>
</tr>
<tr>
<td>MAGES</td>
<td>ANNIE</td>
<td>THE DARK CHILD</td>
</tr>
<tr>
<td>射手</td>
<td>凯特琳</td>
<td>皮城女警</td>
</tr>
</tbody>
<tfoot>
<th>表尾1</th>
<th>表尾2</th>
<th>表尾3</th>
</tfoot>
</table>
</div>
</div>
</body>
</html>
本文作者:玩单机的零度
本文链接:https://www.cnblogs.com/cxyfyf/p/17086376.html
版权声明:本作品采用知识共享署名-非商业性使用-禁止演绎 2.5 中国大陆许可协议进行许可。
【推荐】编程新体验,更懂你的AI,立即体验豆包MarsCode编程助手
【推荐】凌霞软件回馈社区,博客园 & 1Panel & Halo 联合会员上线
【推荐】抖音旗下AI助手豆包,你的智能百科全书,全免费不限次数
【推荐】博客园社区专享云产品让利特惠,阿里云新客6.5折上折
【推荐】轻量又高性能的 SSH 工具 IShell:AI 加持,快人一步