简述：
项目中可能会遇到多个html，其中顶部头部或者资源文件引用都相同的情况等,为了简洁项目结构，净化页面，采用了本方案来解决，如下：

1. pom文件添加相关依赖

       <?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>general-manager</groupId>
    <artifactId>general-manager-web</artifactId>
    <version>1.0-SNAPSHOT</version>
    <!--springboot 基本配置构建 start -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.7.RELEASE</version>
    </parent>
    <!--spring boot-->
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <!-- freemarker -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-freemarker</artifactId>
        </dependency>
        <!--sitemesh模版装饰-->
        <dependency>
            <groupId>org.sitemesh</groupId>
            <artifactId>sitemesh</artifactId>
            <version>3.0.1</version>
        </dependency>
        <!-- 热部署依赖 start-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>springloaded</artifactId>
            <version>1.2.6.RELEASE</version>
        </dependency>
        <dependency><!---->
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional> <!-- 这个需要为 true 热部署才有效 -->
        </dependency>

    </dependencies>

    <build>
        <finalName>general-manager-web</finalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>exec-maven-plugin</artifactId>
                <configuration>
                    <executable>java</executable>
                    <arguments>
                        <argument>com.py.general.App</argument>
                    </arguments>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

2. 创建sitemesh目录存放sitemesh相关配置

image.png

DecoratorController

package com.py.general.web.sitemesh;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import java.util.List;

/**
 * Created by py
 */
@Controller
@RequestMapping(value = "/decorator")
public class DecoratorController  {

    private static final Logger logger = LoggerFactory.getLogger(DecoratorController.class);

    @RequestMapping(value = "/index")
    public ModelAndView index(ModelMap modelMap) {
        return new ModelAndView("decorators/index");
    }
}

WebConfig

package com.py.general.web.sitemesh;


import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

/**
 * Created by py
 */
@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {

    @Bean
    public FilterRegistrationBean siteMeshFilter() {
        FilterRegistrationBean fitler = new FilterRegistrationBean();
        WebSiteMeshFilter siteMeshFilter = new WebSiteMeshFilter();
        fitler.setFilter(siteMeshFilter);
        return fitler;
    }
}

WebSiteMeshFilter

package com.py.general.web.sitemesh;

import org.sitemesh.builder.SiteMeshFilterBuilder;
import org.sitemesh.config.ConfigurableSiteMeshFilter;

/**
 * Created by py
 */
public class WebSiteMeshFilter extends ConfigurableSiteMeshFilter {

    public static final String DECORATOR_URL="/decorator/index";

    /**
     * decoratorPath 第一个参数配置被模板装饰的页面  第二个参数为模板页
     * @param builder
     */
    @Override
    protected void applyCustomConfiguration(SiteMeshFilterBuilder builder) {
        builder.addDecoratorPath("/", DECORATOR_URL)
                .addDecoratorPath("/test", DECORATOR_URL)
                .addExcludedPath("/test1")//不需要装饰的路径
                .addExcludedPath(DECORATOR_URL);
    }
}

3. application.yml

server:
  port: 8001

spring:
  freemarker:
    cache: false
    settings:
      template_update_delay: 0

4.页面文件处理,templates下创建修饰目录

image.png

footer.ftl

footer.............................................

header.ftl

<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>通用管理平台|
    </title>
    <link rel="shortcut icon" href="/img/favicon.ico" />
    <link href="/css/bootstrap.min.css" rel="stylesheet">
    <#--根据自己模板所需要的木块添加 css  只需包含在head标签即可-->
    <sitemesh:write property='head'/>

</head>

index.ftl

<html xmlns:th="http://www.w3.org/1999/xhtml" xmlns="http://www.w3.org/1999/html">
    <#include "header.ftl">

    <body id="test">
    修饰页面主题内容
    </br>
    <sitemesh:write property='body'/>

    <#include "footer.ftl">

    </body>
</html>

test.ftl

<head>
        <link href="/css/bootstrap.min.test.css" rel="stylesheet">
</head>

<body>
    被修饰页面主体内容
</body>

testController.java

package com.py.general.web.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
/**
 * Created by py on 2017/11/29.
 */
@Controller
public class TestController {
    @RequestMapping(value = "/test")
    public String  test(){
        return  "test1";
    }

}

运行结果：

image.png

image.png