共计 5216 个字符，预计需要花费 14 分钟才能阅读完成。
SpringBoot pdf 打印及预览 (openhtmltopdf+freemarker)
- 增加依赖
openhtmltopdf+freemarker
<properties>
<openhtml.version>1.0.10</openhtml.version>
</properties>
<!--openhtmltopdf -->
<dependencies>
<dependency>
<!-- ALWAYS required, usually included transitively. -->
<groupId>com.openhtmltopdf</groupId>
<artifactId>openhtmltopdf-core</artifactId>
<version>${openhtml.version}</version>
</dependency>
<dependency>
<!-- Required for PDF output. -->
<groupId>com.openhtmltopdf</groupId>
<artifactId>openhtmltopdf-pdfbox</artifactId>
<version>${openhtml.version}</version>
</dependency>
<dependency>
<!-- Optional, leave out if you do not need logging via slf4j. -->
<groupId>com.openhtmltopdf</groupId>
<artifactId>openhtmltopdf-slf4j</artifactId>
<version>${openhtml.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>
</dependencies>- 在 /resources/template/view/html 新建模板 xxx.ftl 文件
<html>
<head>
<meta charset="UTF-8"/>
<style>
/* 特有 css 款式自行参考官网 */
@page {
size: a4;
@top-left {content: element(header-left);
}
@top-center {content: element(header-center);
}
@top-right {content: element(header-right);
}
@bottom-center {
font-size: 14px;
content: counter(page);
font-family: 'simsun', serif;
}
margin: 50px;
}
* {
margin: 0;
padding: 0;
font-family: 'simsun', serif;
}
#page-header-left {
font-size: 10px;
font-weight: bold;
position: running(header-left);
}
#page-header-center {
font-size: 10px;
font-weight: bold;
position: running(header-center);
}
#page-header-right {
font-size: 10px;
font-weight: bold;
position: running(header-right);
}
table {
width: 100%;
font-size: 14px;
border-collapse: collapse;
font-family: 'simsun', serif;
border-spacing: 0;
/* The magical table pagination property. */
/*-fs-table-paginate: paginate;*/
/* Recommended to avoid leaving thead on a page by itself. */
-fs-page-break-min-height: 0.5cm;
border-left: 0.07cm solid black;
border-right: 0.07cm solid black;
border-bottom: 0.03cm solid black;
}
.checkbox {
display: inline-block;
position: relative;
top: 1px;
width: 10px;
height: 10px;
border: 1px solid black;
}
.correct {
display: inline-block;
position: relative;
top: 2px;
right: 15px;
width: 7px;
height: 3px;
border-left: 1px solid black;
border-bottom: 1px solid black;
-webkit-transform: rotate(-45deg);
transform: rotate(-45deg);
margin-right: -16px;
}
input[type = "checkbox"] {
width: 10px;
height: 10px;
border: 1px solid black;
}
tr, thead, tfoot {page-break-inside: avoid;}
td, th {
page-break-inside: avoid;
font-family: 'simsun', serif;
padding: 1px;
border-top: 0.03cm solid black;
border-left: 0.03cm solid black;
}
td:first-child, th:first-child {border-left: 0;}
#table-title {
text-align: center;
margin-top: 0;
margin-bottom: 5px;
font-weight: bold;
}
</style>
</head>
<body>
<div class="header-box">
<div id="page-header-left">
<span id="page-header-text"> 编号：<span style="font-weight: normal">${code!''}</span></span>
</div>
<div id="page-header-center">
<span id="page-header-text"> 工夫 <sup>1)</sup>：<span
style="font-weight: normal">${time?date!''}</span></span>
</div>
</div>
<div class="basic-box">
<table style="border-top: 0;">
<tr>
<td> 题目 1 </td>
<td>${xx1!''}</td>
<td> 题目 2 </td>
<td>${xx2!''}</td>
<td> 题目 3 </td>
<td>${xx3!''}</td>
</tr>
<tr>
<td style="font-weight: bold;text-align: left;"> 后果 </td>
<td colspan="3" style="text-align: left;">
<div>
<div class="checkbox"></div>
<#if result??&&result == '1'>
<div class="correct"></div>
</#if>
<div style="display: inline-block"> 合格 </div>
<div class="checkbox"></div>
<#if result??&&result == '0'>
<div class="correct"></div>
</#if>
<div style="display: inline-block"> 不合格 </div>
</div>
</td>
<td colspan="4" style="font-weight: bold;text-align: left;"> 签字人：</td>
</tr>
</table>
</div>
</body>
</html>- controller 接口
@RequestMapping(value = "/print/pdf/{code}", produces = MediaType.APPLICATION_PDF_VALUE)
public ResponseEntity<byte[]> printPdf(@PathVariable("code") String detectCode) throws IOException, TemplateException {Assert.hasText(code, "code 不能为空");
return detectReportPrintService.findPdf(code);
}- service 实现类
📌pdf 预览有中文乱码，须要从新引入 simsun.ttf 字体文件，放在 /resources/fonts 文件夹下（与代码门路统一即可），ftl 文件中 css 款式必须 font-family: ‘simsun’, serif;
📌在
Configuration中能够应用上面的办法来不便建设三种模板加载。(每种办法都会在其外部新建一个模板加载器对象，而后创立Configuration实例来应用它。)
1. void setDirectoryForTemplateLoading(File dir);
2. void setClassForTemplateLoading(Class cl, String prefix);
3. void setServletContextForTemplateLoading(Object servletContext, String path);
我的项目打包为 jar 包只能应用 setClassForTemplateLoading 办法。
public ResponseEntity<byte[]> findPdf(String code) throws IOException, TemplateException {
// 获取 ftl 所需变量值的自定义办法
Map data = this.findValue(code);
//FreeMarker 生成 html 字符串
Configuration conf = new Configuration(Configuration.VERSION_2_3_23);
conf.setDefaultEncoding("UTF-8");
// 加载模板文件 (模板的门路)
// 有多种加载模板的办法
// 我的项目打包为 jar 包只能应用 setClassForTemplateLoading 办法
// 第一个参数：springboot 启动类，第二个参数：ftl 模板对应 resources 下的地位
conf.setClassForTemplateLoading(XaWebApplication.class, "/template/view/html");
// 加载模板
Template template = conf.getTemplate("/xxx.ftl");
// 传入变量生成 html 字符串
String htmlString = FreeMarkerTemplateUtils.processTemplateIntoString(template, data);
//openhtmltopdf 生成 pdf
@Cleanup ByteArrayOutputStream os = new ByteArrayOutputStream();
PdfRendererBuilder builder = new PdfRendererBuilder();
builder.withHtmlContent(htmlString, "");
builder.useFont(new FSSupplier<InputStream>() {
@SneakyThrows
@Override
public InputStream supply() {return resourceLoader.getResource("classpath:fonts/simsun.ttf").getInputStream();}
}, "simsun");
builder.toStream(os);
builder.run();
byte[] bytes = os.toByteArray();
return new ResponseEntity<>(bytes, HttpStatus.OK);
}
正文完
发表至： springboot
2023-05-17
