使用其他项目的百里香模板

时间：2019-07-02 14:24:11

标签： maven spring-boot spring-mvc thymeleaf

如果将百里香叶用于多个项目，则似乎有问题。

假设我在项目2中有一个spring应用程序，在项目1中有一个控制器。定义了正确的@ComponentScan之后，该应用程序就可以在我的模板文件夹中显示view / html。但是，一旦我添加了thymeleaf-layout-dialect maven依赖项，它就会失败，并显示“出现意外错误（类型=未找到，状态= 404）”。错误。

我的项目：

structure

prj1 pom.xml：

<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>macrohard.org</groupId>
  <artifactId>prj1</artifactId>
  <version>0.0.1-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.4.RELEASE</version>
        <relativePath/> 
    </parent>

 <dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
    <dependency>
        <groupId>nz.net.ultraq.thymeleaf</groupId>
        <artifactId>thymeleaf-layout-dialect</artifactId>
    </dependency>

</dependencies>
</project>

prj2 pom.xml：

<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>macrohard.org</groupId>
  <artifactId>prj2</artifactId>
  <version>0.0.1-SNAPSHOT</version>

  <dependencies>
    <dependency>
        <groupId>macrohard.org</groupId>
        <artifactId>prj1</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </dependency>
  </dependencies>
</project>

hello-world.html：

<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>HW</title>
</head>
<body>
    Hello World!!
</body>
</html>

prj2中的App2：

package prj2;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;

@SpringBootApplication
@ComponentScan(basePackages = { "prj1"} )
public class App2 {
    public static void main(String[] args) {
        SpringApplication.run(App2.class, args);
    }
}

prj1中的Controller1 

package prj1.web;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.ModelAndView;

@RestController
@RequestMapping(value="/api")
public class Controller1 {

    // this can be run by App2 & App1
    @GetMapping(value="/hello")
    public String hello() {
        return "hello world";
    }

    // this can be run by App1 only
    @GetMapping(value="/hello2")
    public ModelAndView hello2() {
        ModelAndView mav = new ModelAndView();
        mav.setViewName("hello-world");
        return mav;
    }

}

与Controller1中一样，可以成功请求“ api / hello”，因为它不涉及模板。但是对于“ api / hello2”请求，它无法呈现hello-world.html。这里是错误堆栈：

2019-07-02 22:21:28.758  INFO 19680 --- [           main] prj2.App2                                : Started App2 in 1.89 seconds (JVM running for 2.454)
2019-07-02 22:21:51.807  INFO 19680 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'
2019-07-02 22:21:51.807  INFO 19680 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
2019-07-02 22:21:51.807 TRACE 19680 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Detected org.springframework.web.multipart.support.StandardServletMultipartResolver@2ded92
2019-07-02 22:21:51.810 TRACE 19680 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : No LocaleResolver 'localeResolver': using default [AcceptHeaderLocaleResolver]
2019-07-02 22:21:51.811 TRACE 19680 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : No ThemeResolver 'themeResolver': using default [FixedThemeResolver]
2019-07-02 22:21:51.814 TRACE 19680 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : No RequestToViewNameTranslator 'viewNameTranslator': using default [DefaultRequestToViewNameTranslator]
2019-07-02 22:21:51.817 TRACE 19680 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : No FlashMapManager 'flashMapManager': using default [SessionFlashMapManager]
2019-07-02 22:21:51.817 DEBUG 19680 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : enableLoggingRequestDetails='false': request parameters and headers will be masked to prevent unsafe logging of potentially sensitive data
2019-07-02 22:21:51.817  INFO 19680 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 10 ms
2019-07-02 22:21:51.829 TRACE 19680 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : GET "/api/hello2", parameters={}, headers={masked} in DispatcherServlet 'dispatcherServlet'
2019-07-02 22:21:51.834 TRACE 19680 --- [nio-8080-exec-1] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped to public org.springframework.web.servlet.ModelAndView prj1.web.Controller1.hello2()
2019-07-02 22:21:51.843 TRACE 19680 --- [nio-8080-exec-1] .w.s.m.m.a.ServletInvocableHandlerMethod : Arguments: []
2019-07-02 22:21:51.851 DEBUG 19680 --- [nio-8080-exec-1] o.s.w.s.v.ContentNegotiatingViewResolver : Selected 'text/html' given [text/html, application/xhtml+xml, image/webp, image/apng, application/signed-exchange;v=b3, application/xml;q=0.9, */*;q=0.8]
2019-07-02 22:21:51.851 TRACE 19680 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Rendering view [org.springframework.web.servlet.view.InternalResourceView: name 'hello-world'; URL [hello-world]] 
2019-07-02 22:21:51.851 DEBUG 19680 --- [nio-8080-exec-1] o.s.w.servlet.view.InternalResourceView  : View name 'hello-world', model {}
2019-07-02 22:21:51.853 DEBUG 19680 --- [nio-8080-exec-1] o.s.w.servlet.view.InternalResourceView  : Forwarding to [hello-world]
2019-07-02 22:21:51.857 TRACE 19680 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : "FORWARD" dispatch for GET "/api/hello-world", parameters={}, headers={masked} in DispatcherServlet 'dispatcherServlet'
2019-07-02 22:21:51.860 TRACE 19680 --- [nio-8080-exec-1] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped to HandlerExecutionChain with [ResourceHttpRequestHandler ["classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/", "/"]] and 3 interceptors
2019-07-02 22:21:51.862 DEBUG 19680 --- [nio-8080-exec-1] o.s.w.s.r.ResourceHttpRequestHandler     : Resource not found
2019-07-02 22:21:51.862 TRACE 19680 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : No view rendering, null ModelAndView returned.
2019-07-02 22:21:51.862 DEBUG 19680 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Exiting from "FORWARD" dispatch, status 404, headers={}
2019-07-02 22:21:51.864 DEBUG 19680 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed 404 NOT_FOUND, headers={}
2019-07-02 22:21:51.865 TRACE 19680 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : "ERROR" dispatch for GET "/error", parameters={}, headers={masked} in DispatcherServlet 'dispatcherServlet'
2019-07-02 22:21:51.865 TRACE 19680 --- [nio-8080-exec-1] s.w.s.m.m.a.RequestMappingHandlerMapping : 2 matching mappings: [{ /error, produces [text/html]}, { /error}]
2019-07-02 22:21:51.866 TRACE 19680 --- [nio-8080-exec-1] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped to public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2019-07-02 22:21:51.875 TRACE 19680 --- [nio-8080-exec-1] .w.s.m.m.a.ServletInvocableHandlerMethod : Arguments: [org.apache.catalina.core.ApplicationHttpRequest@6fdc83, org.apache.catalina.connector.ResponseFacade@119a78b]
2019-07-02 22:21:51.885 DEBUG 19680 --- [nio-8080-exec-1] o.s.w.s.v.ContentNegotiatingViewResolver : Selected 'text/html' given [text/html, text/html;q=0.8]
2019-07-02 22:21:51.886 TRACE 19680 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Rendering view [org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration$StaticView@216e30] 
2019-07-02 22:21:51.908 DEBUG 19680 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Exiting from "ERROR" dispatch, status 404, headers={}

我敢肯定这是由于thymeleaf-layout-dialect所致，因为如果我从pom.xml中删除它，一切都会正常进行。 问题是我需要它来布局百里香页。如何在与Spring应用程序不同的另一个项目中显示模板？

2 个答案:

答案 0 :(得分：1)

当您发布了一个示例项目时，我无法解决问题：/

您确定不只是将控制器中的“ hello world”消息与模板中的消息混淆了吗？

当我修改时：\prj1\src\main\resources\templates\hello-world.html 

<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>HW</title>
</head>
<body>
    Hello World!! (from Template in prj1)!
</body>
</html>

由于一些奇怪的类路径问题，我不得不将此添加到prj1的pom.xml中： （您使用的thymeleaf-layout-方言库似乎带来了一个额外的thymeleaf罐子-并未对此进行调查）

 <dependency>
     <groupId>org.thymeleaf</groupId>
     <artifactId>thymeleaf</artifactId>
     <version>3.0.11.RELEASE</version>
 </dependency>

当我运行prj2应用并致电：http://localhost:8080/api/hello3或http://localhost:8080/api/hello2时 我得到：

Hello World!! (from Template in prj1)!

我们想要什么？

当我打电话时：http://localhost:8080/api/hello 由于出现一些找不到的模板而导致错误（“ hello world”当然不是模板文件）。

所以我不确定为什么它不适用于您：/

答案 1 :(得分：0)

我不确定在没有这种依赖性的情况下该如何工作。使用模板的控制器可以直接返回模板名称。并且您正在实现rest控制器，这些控制器建议的默认值与使用模板（如内容类型）所需的默认值不同。

因此可以调用模板的控制器看起来像（这是我的操作方式，不能声称我知道它是唯一的）：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

@Controller
public class MyController {

    @Autowired
    public MyController() {
    }

    @RequestMapping("/hello-world")
    public String hello(Model model) {

        model.addAttribute("someKey", "someValue");
        return "hello-world"; // this is the template name in src/main/resources
    }

}

通过这种方式，还可以将控制器/模板捆绑在一个jar中，并在不同的spring boot应用程序中将它们用作依赖项。由于它全部基于类路径（there is a property to configure this：spring.thymeleaf.prefix），因此对我来说确实有用。

我认为原因实际上是您的休息控制器-这可能会使事情有些混乱。

相关问题
最新问题