在移动端大行其道的现在，前后端分离成为大势所趋，jsp这种传统的动态页面也开始逐渐退出历史舞台了，但Spring Boot还是提供了动态页面支持。
Spring Boot建议使用模板引擎（如：Thymeleaf、FreeMarker、Groovy）而不是jsp来渲染页面，Sping Boot使用模板引擎时默认的模板配置路径为src/main/resources/templates。
1.Thymeleaf
1.1 添加依赖
dependencies {
compile group: 'com.alibaba', name: 'fastjson', version: '1.2.38'
compile('org.springframework.boot:spring-boot-starter')
compile('org.springframework.boot:spring-boot-starter-web')
compile('org.springframework.boot:spring-boot-starter-thymeleaf')
testCompile('org.springframework.boot:spring-boot-starter-test')
}
1.2 后端Controller层代码：WebController.java
@SuppressWarnings("unused")
@Controller
public class WebController {
@RequestMapping("/test")
public String index(ModelMap modelMap){
modelMap.addAttribute("test","thymeleaf");
return "thymeleaf";
}
}
还有一种常见用法是不通过SpringMVC直接返回页面内容，而是将模板页面内容处理后以邮件发送
// kotlin代码片段
val context = Context()
context.setVariable("email", email)
context.setVariable("link", "${link}/register?key=$key")
val content = springTemplateEngine.process("invite", context)
mailHelper.sendHtml(email!!, "邀请注册", content)
1.3 前端页面：./src/main/resources/templates/thymeleaf.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head lang="en">
<meta charset="UTF-8" />
<title></title>
</head>
<body>
<div th:text="${test}">Hello World<div>
</body>
</html>
1.4 配置文件
如果要修改Thymeleaf默认的配置，需要在application.properties中修改（以下内容来自官网https://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle的Part X部分）
# THYMELEAF (ThymeleafAutoConfiguration)
spring.thymeleaf.cache=true # Enable template caching.
spring.thymeleaf.check-template=true # Check that the template exists before rendering it.
spring.thymeleaf.check-template-location=true # Check that the templates location exists.
spring.thymeleaf.enabled=true # Enable Thymeleaf view resolution for Web frameworks.
spring.thymeleaf.encoding=UTF-8 # Template files encoding.
spring.thymeleaf.excluded-view-names= # Comma-separated list of view names that should be excluded from resolution.
spring.thymeleaf.mode=HTML5 # Template mode to be applied to templates. See also StandardTemplateModeHandlers.
spring.thymeleaf.prefix=classpath:/templates/ # Prefix that gets prepended to view names when building a URL.
spring.thymeleaf.reactive.max-chunk-size= # Maximum size of data buffers used for writing to the response, in bytes.
spring.thymeleaf.reactive.media-types= # Media types supported by the view technology.
spring.thymeleaf.servlet.content-type=text/html # Content-Type value written to HTTP responses.
spring.thymeleaf.suffix=.html # Suffix that gets appended to view names when building a URL.
spring.thymeleaf.template-resolver-order= # Order of the template resolver in the chain.
spring.thymeleaf.view-names= # Comma-separated list of view names that can be resolved.
2.FreeMarker
3.Groovy
4.Velocity
各种模板引擎的使用其实比较类似，而且目前的趋势是前后端分离，后端只提供API，所以模板引擎的使用并不是很多，其它模板引擎的具体用法不一一赘述了。
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