春季启动whitelabel 404 [英] Spring boot whitelabel 404
问题描述
大家好，我一直在收到这个错误，即使我从他们的网站上浏览了Spring教程。我一直在努力弄清楚为什么我得到这个错误。我能够连接到Facebook，但当试图检索像Spring提供的教程那样的Feed时，我不断收到白标签错误。它说：
Hello guys I keep getting this error even though I have followed spring tutorial from their website. I have been trying to figure it out why I'm getting this error. I am able to connect to facebook but when trying to retrieve the feeds like the tutorial provided by spring, I keep getting a whitelabel error. It says:
这个应用程序没有明确的映射/错误，所以你将这看作是后备。有一个意外的错误（type = Not Found，status = 404）。没有消息可用
This application has no explicit mapping for /error, so you are seeing this as a fallback. There was an unexpected error (type=Not Found, status=404). No message available
一切似乎都没问题，但不知道为什么我一直收到这个错误。如果有人可以协助，我会欣赏它。
Everything seems to be okay but dont know why I keep getting this error. if someone can assist I will appreciate it.
我的控制器放在src / main / java / home中：
My controller placed in src/main/java/home:
@Controller
@RequestMapping(value="/")
public class HomeController {
private Facebook facebook;
@Inject
public HomeController(Facebook facebook) {
this.facebook = facebook;
}
@RequestMapping( method =RequestMethod.GET)
public String getPhotos(Model model){
if(!facebook.isAuthorized())
{
return "redirect:/connect/facebook";
}
model.addAttribute(facebook.userOperations().getUserProfile());
PagedList<Post> homeFeed = facebook.feedOperations().getHomeFeed();
model.addAttribute("feed", homeFeed);
return "hello";
}
}
将Application.java文件放置在src / main / java / home / main：
Application.java file placed in src/main/java/home/main:
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
以下是我的build.gradle文件：
Below is my build.gradle file:
apply plugin: 'java'
apply plugin: 'idea'
apply plugin: 'spring-boot'
buildscript{
repositories{
// maven { url "https://repo.spring.io/release" }
maven { url "https://repo.spring.io/libs-milestone"}
// mavenCentral()
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:1.2.3.RELEASE")
}
}
repositories {
maven { url "https://repo.spring.io/libs-milestone"}
mavenCentral()
}
bootRepackage {
mainClass = 'facebookArchiver.Application'
}
dependencies {
compile ('org.springframework.social:spring-social-facebook:2.0.0.RELEASE')
compile("org.springframework.boot:spring-boot-starter-thymeleaf")
compile('org.springframework.boot:spring-boot-starter-web')
testCompile group: 'junit', name: 'junit', version: '4.11'
}
task wrapper(type: Wrapper) {
gradleVersion = '2.3'
}
hello.html文件：保存在src / main / resources / templates文件夹中：
hello.html file: It's saved in src/main/resources/templates folder:
<html>
<head>
<title>Hello Facebook</title>
</head>
<body>
<h3>Hello, <span th:text="${facebookProfile.name}">Some User</span>!</h3>
<h4>Here is your home feed:</h4>
<div th:each="post:${feed}">
<b th:text="${post.from.name}">from</b> wrote:
<p th:text="${post.message}">message text</p>
<img th:if="${post.picture}" th:src="${post.picture}"/>
<hr/>
</div>
</body>
</html>
facebookConnect.html：它存储在src / main / resources / templates / connect文件夹下：
facebookConnect.html: it's stored under src/main/resources/templates/connect folder:
<html>
<head>
<title>Hello Facebook</title>
</head>
<body>
<h3>Connect to Facebook</h3>
<form action="/connect/facebook" method="POST">
<input type="hidden" name="scope" value="read_stream" />
<div class="formInfo">
<p>You aren't connected to Facebook yet. Click the button to connect this application with your Facebook account.</p>
</div>
<p><button type="submit">Connect to Facebook</button></p>
</form>
</body>
</html>
最后facebookConnected.html：也保存在src / main / resources / templates / connect文件夹下：是facebookConnected.html的文件：
And finally facebookConnected.html: also stored under src/main/resources/templates/connect folder: Below is the file for facebookConnected.html:
<html>
<head>
<title>Hello Facebook</title>
</head>
<body>
<h3>Connected to Facebook</h3>
<p>
You are now connected to your Facebook account.
Click <a href="/">here</a> to see some entries from your Facebook photos.
</p>
</body>
</html>
推荐答案
如果您的控制器处于不同的封装结构中， @ComponentScan 需要添加到 Spring Boot 应用程序 class 。
If your controllers are in a different package structure, then @ComponentScan needs to be added to the Spring Boot application class.
示例：
Example :
@ComponentScan(basePackages={"package name of where the controller is"})
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