每次浏览器访问某些类似页面，比如商品的详情页。如果都要查库，查搜索再生成的话，面对高并发、大流量的情况性能不佳。所以直接把商品页静态话，查商品详情页时，首先查是否有该商品的已经生成的详情页，有的话直接反馈。没有再查库生成。
类似于所有页面套用一个通用模板生成。
jar包
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
Controller层静态化和非Controller层静态化
Controller层静态化：
导入TemplateEngine、配置静态化地址
@Resource
private TemplateEngine templateEngine;
private String localDir="D:/IDEALocation/shopHtml/item/";
//数据静态化
private void htmlStatic(HttpServletRequest request, HttpServletResponse response,ItemDocum itemDocum) {
WebContext ctx = new WebContext(request, response, request.getServletContext(), request.getLocale());
//这里item是页面渲染时的变量名
ctx.setVariable("item",itemDocum);
String fileName=itemDocum.getId()+".html";
FileWriter fileWriter=null;
try {
fileWriter = new FileWriter(localDir+fileName);
//这里的item为template模板名
templateEngine.process("item", ctx, fileWriter );
System.out.println("静态化文件成功");
} catch (IOException e) {
e.printStackTrace();
} finally {
if (fileWriter != null) {
try {
fileWriter.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
template类似如下：当然你可以搞得更精致
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
<link rel="stylesheet" href="http://res.shop.com/web-js/libs/bootstrap-table-1.15.3/dist/bootstrap-table.min.css">
<script src="http://res.shop.com/web-js/libs/jquery/jquery-3.4.1.min.js"></script>
<script src="http://res.shop.com/web-js/libs/bootstrap/js/bootstrap.min.js"></script>
<script src="http://res.shop.com/web-js/libs/layer/layer.js"></script>
<script src="http://res.shop.com/web-js/js/ajax.js"></script>
<script src="http://res.shop.com/web-js/js/cart.js"></script>
</head>
<body>
<div th:text="${item.name}"></div>
<div th:text="${item.price}"></div>
<div th:utext="${item.img}"></div>
</body>
</html>
非Controller层静态化：
代码不变，仅context上下文生成方式变化。
导入TemplateEngine、配置静态化地址
@Resource
private TemplateEngine templateEngine;
private String localDir="D:/IDEALocation/shopHtml/item/";
//数据静态化
private void htmlStatic(ItemDocum itemDocum) {
//变化
Context ctx = new Context();
ctx.setVariable("item",itemDocum);
String fileName=itemDocum.getId()+".html";
FileWriter fileWriter=null;
try {
fileWriter = new FileWriter(localDir+fileName);
templateEngine.process("item", ctx, fileWriter );
System.out.println("静态化文件成功");
} catch (IOException e) {
e.printStackTrace();
} finally {
if (fileWriter != null) {
try {
fileWriter.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}