spring boot:thymeleaf给fragment传递参数的方法(spring boot 2.3.3)

一，thymeleaf如何给fragment传递参数？

1,如果是全局的参数，可以用interceptor中传递

  非全局参数，可以从controller中传递

2,引用片断时也可以传递参数

  

说明：刘宏缔的架构森林是一个专注架构的博客，地址：https://www.cnblogs.com/architectforest

         对应的源码可以访问这里获取： https://github.com/liuhongdi/

说明：作者:刘宏缔 邮箱: 371125307@qq.com

二，演示项目的相关信息

1，项目地址:

https://github.com/liuhongdi/fragmentparam

2,项目功能：

        用一个页面header的例子，

        演示了给fragment传递参数

3,项目结构,如图:

三，配置文件说明

1,pom.xml

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--thymeleaf begin-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

2,application.properties

#error
server.error.include-stacktrace=always
#error
#logging.level.org.springframework.web=trace
logging.level.org.springframework.web=debug
#thymeleaf
spring.thymeleaf.cache=false
spring.thymeleaf.encoding=UTF-8
spring.thymeleaf.mode=HTML
spring.thymeleaf.prefix=classpath:/templates/
spring.thymeleaf.suffix=.html

四，java代码说明

1,HomeController.java

@RequestMapping("/home")
@Controller
public class HomeController {

    //传递参数给模板
    @GetMapping("/home")
    public String index(ModelMap modelMap) {
        modelMap.addAttribute("curTitle","首页");
        modelMap.addAttribute("jsversion","20200915121212");
        return "home/home";
    }
}

2,DefaultMvcConfig.java

@Configuration
@ConditionalOnWebApplication(type = ConditionalOnWebApplication.Type.SERVLET)
public class DefaultMvcConfig implements WebMvcConfigurer {

    @Resource
    private WebInterceptor webInterceptor;

    //添加Interceptor
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(webInterceptor)
                .addPathPatterns("/home/**","/goods/**","/login/login","/order/**","/set/**","/admin/**","/merchant/**")
                .excludePathPatterns("/html/*","/js/*");
    }
}

配置interceptor

3,WebInterceptor.java

@Component
public class WebInterceptor extends HandlerInterceptorAdapter {
    //如果view不为空，把登录信息传递给模板
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) {
        if (modelAndView != null) {
            ModelMap modelMap = modelAndView.getModelMap();
            modelMap.addAttribute("GlobalTitle","商品管理系统");
        }
    }
}

传递参数给模板

4,header.html

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:th="http://www.thymeleaf.org">
<head th:fragment="common_header(jsversion,csslink)">
    <title>[[${curTitle}]]-[[${GlobalTitle}]]</title>
    <!--全局通用框架样式 begin-->
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
    <meta charset="utf-8" />
    <meta name="description" content="" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" />
    <script type="text/javascript" language="JavaScript" th:src="@{/js/utils.js(${jsversion})}" ></script>
    <th:block th:replace="${csslink}" />
</head>

说明：两个参数：curTitle,GlobalTitle是java直接传递到模板的

         另两个参数： jsversion,csslink是通过fragment传递的参数

5,home.html

<!DOCTYPE html>
<html lang="en">
<head th:replace="common/header :: common_header(${jsversion},~{::link})">
    <link rel="stylesheet" href="/css/home.css" />
    <link rel="stylesheet" href="/css/home2.css" />
</head>
<body>
<div style="100%;height:30px;background:#ffffff;font-size: 16px;" ></div>
<div id="content" style="1040px;">
    <div style="790px;float:left;margin-left:30px;">
        <!--main begin-->
        this is home
        <!--main   end-->
    </div>
</div>
</body>
</html>

说明：在引用fragment时，jsversion这个参数，我们直接取java传递的值,

          ::link则表示取当前元素下面的link元素,两个都会传递给fragment

五，测试效果

1，访问:

http://127.0.0.1:8080/home/home

返回:

可以看到title中包含的两个参数已起作用

查看源码:

<!DOCTYPE html>
<html lang="en">
<head>
    <title>首页-商品管理系统</title>
    <!--全局通用框架样式 begin-->
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
    <meta charset="utf-8" />
    <meta name="description" content="" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" />
    <script type="text/javascript" language="JavaScript" src="/js/utils.js?20200915121212" ></script>
    <link rel="stylesheet" href="/css/home.css" /><link rel="stylesheet" href="/css/home2.css" />
</head>
<body>
<div style="100%;height:30px;background:#ffffff;font-size: 16px;" ></div>
<div id="content" style="1040px;">
    <div style="790px;float:left;margin-left:30px;">
        <!--main begin-->
        this is home
        <!--main   end-->
    </div>
</div>
</body>
</html>

可以看到：jsversion的传递生效,

两个css文件的传递也生效

六，查看spring boot版本

  .   ____          _            __ _ _
 /\ / ___'_ __ _ _(_)_ __  __ _    
( ( )\___ | '_ | '_| | '_ / _` |    
 \/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.3.3.RELEASE)
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原文地址：https://www.cnblogs.com/architectforest/p/13678862.html