<!-- 添加2个依赖 html2image 把html转换成图片格式 freemarker模板引擎-->
<dependency>
<groupId>gui.ava</groupId>
<artifactId>html2image</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>
// 在yml 文件中设置Freemarker模板参数
spring:
profiles:
active: dev
## 设定ftl文件路径
freemarker:
template-loader-path: classpath:/templates
##是否开启缓存
cache: false
##设置编码格式
charset: utf-8
##检查模板路径是否存在
check-template-location: true
##请求头格式
content-type: text/html
expose-request-attributes: false
expose-session-attributes: false
request-context-attribute: request
suffix: .html
path: /data/image/skc/images/FreemarkerTemplates.html
//模板文件 index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
</head>
<body>
<div
style="
333px;
height: 585px;
padding: 36px 0 0;
box-sizing: border-box;
background: #f8f3ea
url(http://xxxx/miniapp/logo.png);
no-repeat: center / cover;
text-align: center;
border-radius: 10px;
text-align: center;
line-height: 1;
"
>
<img
style="height: 20px"
src="http://xxxx/miniapp/logo.png"
alt
/>
<p
style="
margin-block-start: 0;
margin-block-end: 0;
margin-inline-start: 0px;
margin-inline-end: 0px;
padding-top: 30px;
font-size: 18px;
font-weight: 400;
color: #333333;
line-height: 1;
letter-spacing: 2px;
"
>
您的专属qq顾问
</p>
<div
style="
margin: 20px auto 35px;
34px;
height: 2px;
background: #cb8831;
"
></div>
<img
style="margin: 0 auto; 111px; height: 111px; border-radius: 50%"
src=${FreemarkerFormVO.avatar}
alt=""
/>
<div
style="
padding-top: 10px;
font-size: 21px;
font-weight: 500;
color: #333333;
line-height: 30px;
letter-spacing: 2px;
"
>
${FreemarkerFormVO.userName}
</div>
<div
style="
padding: 5px 0;
font-size: 15px;
font-weight: 400;
color: #333333;
"
>
${FreemarkerFormVO.department}
</div>
<img
style="margin: 40px auto 10px; 110px; height: 110px"
src=${FreemarkerFormVO.qrCode}
alt=""
/>
<div
style="
font-size: 13px;
font-weight: 400;
color: #333333;
line-height: 24px;
letter-spacing: 2px;
"
>
请加我的QQ
</div>
</div>
</body>
</html>
/**
* 接口调用层
* FreemarkerFormVO 入参实体类，对应index.html 中需要替换的参数
*/
@ApiOperation(value="模板")
@PostMapping("/freemarker")
public ResponseEntity<ResultBean<String>> freemarkerIndex(@Valid @RequestBody FreemarkerFormVO bean, Model model) {
model.addAttribute("FreemarkerFormVO",bean);
Map<String, FreemarkerFormVO> root = new HashMap(1);
root.put("FreemarkerFormVO", bean);
String filePath = freeMarkerContent(root);
try {
File file = ResourceUtils.getFile(filePath);
String html = FileReader.create(file).readString();
String s = switchToPic(html);
s= s.replaceAll("\r\n", "");
base64StringToImage(s);
return ResultBeanUtil.success(s);
} catch (Exception e) {
log.error("", e);
}
return ResultBeanUtil.success(filePath);
}
//测试的时候 生成到D盘的AMD文件夹下
private String freeMarkerContent(Map<String, FreemarkerFormVO> root) {
try {
Template temp = cfg.getTemplate("index.html");
//以classpath下面的static目录作为静态页面的存储目录，同时命名生成的静态html文件名称
// File pathFile = new File(path.substring(path.indexOf('/')));
File pathFile = new File("D:\AMD\FreemarkerTemplates.html");
if (!pathFile.getParentFile().exists()) {
pathFile.getParentFile().mkdirs();
}
Writer file = new FileWriter(pathFile);
temp.process(root, file);
file.flush();
file.close();
return "D:\AMD\FreemarkerTemplates.html";
} catch (IOException | TemplateException e) {
log.error(e.getMessage(), e);
}
return null;
}
//变成base64格式
private String switchToPic(String html) {
HtmlImageGenerator imageGenerator = new HtmlImageGenerator();
imageGenerator.getBufferedImage();
// File path=new File(html);
// String urlPath=path.toURL().toString();
// imageGenerator.loadUrl(urlPath);
imageGenerator.loadHtml(html);
//这里如果指定了盘符，可以直接存在本地，自己本地写demo的话可以用
String imageName = imagePath + "html1.png";
imageGenerator.saveAsImage(imageName);
BufferedImage buffimg = imageGenerator.getBufferedImage();
ByteArrayOutputStream os = new ByteArrayOutputStream();
try {
ImageIO.write(buffimg, "png", os);
} catch (Exception e) {
e.printStackTrace();
}
byte[] bytes1 = os.toByteArray();
return encoder.encodeBuffer(bytes1).trim();
}
//base64转图片，生成到指定目录
private void base64StringToImage(String base64) {
try {
byte[] bytes1 = decoder.decodeBuffer(base64);
ByteArrayInputStream bais = new ByteArrayInputStream(bytes1);
BufferedImage bi1 = ImageIO.read(bais);
File f = new File("D:\AMD\html.png");
ImageIO.write(bi1, "png", f);
} catch (IOException e) {
e.printStackTrace();
}
}
