SpringBoot pdf打印及预览(openhtmltopdf+freemarker)
- 添加依赖
<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样式自行参考官网 */
@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">时间 <sup>1)</sup>：<span
style="font-weight: normal">${time?date!''}</span></span>
</div>
</div>
<div class="basic-box">
<table style="border-top: 0;">
<tr>
<td>标题1</td>
<td>${xx1!''}</td>
<td>标题2</td>
<td>${xx2!''}</td>
<td>标题3</td>
<td>${xx3!''}</td>
</tr>
<tr>
<td style="font-weight: bold;text-align: left;">结果</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，需要重新引入simsun.ttf字体文件，放在/resources/fonts文件夹下（与代码路径一致即可），ftl文件中css样式必须font-family: 'simsun', serif;
📌在
Configuration中可以使用下面的方法来方便建立三种模板加载。 (每种方法都会在其内部新建一个模板加载器对象，然后创建Configuration实例来使用它。)
1. void setDirectoryForTemplateLoading(File dir);
2. void setClassForTemplateLoading(Class cl, String prefix);
3. void setServletContextForTemplateLoading(Object servletContext, String path);
项目打包为jar包只能使用setClassForTemplateLoading方法。
public ResponseEntity<byte[]> findPdf(String code) throws IOException, TemplateException {
//获取ftl所需变量值的自定义方法
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(模板的路径)
//有多种加载模板的方法
//项目打包为jar包只能使用setClassForTemplateLoading方法
//第一个参数：springboot启动类，第二个参数：ftl模板对应resources下的位置
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);
}
