我是 Spring/Maven 的新手,正在学习本教程: Serving Web Content with Spring MVC 。
每次我运行 mvn spring-boot:run
时,我都会收到此错误:
Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:1.5.2.RELEASE:run (default-cli) on project gs-serving-web-content: Could not exec java: Application finished with exit code: 1 ->
我尝试添加类路径,尝试运行 mvn install clean spring-boot:run
,在类似情况下做了很多人们在 stackoverflow 上建议的其他事情,花了 8 个多小时 - 没有用。
这是我的 Application.java
:
package hello;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Application {
public static void main(String[] args) throws Exception{
SpringApplication.run(Application.class, args);
}
}
这是我的 GreeetingController.java
类:
package hello;
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 GreetingController {
@RequestMapping("/greeting")
public String greeting(@RequestParam(value="name", required=false, defaultValue="World") String name, Model model) {
model.addAttribute("name", name);
return "greeting";
}
}
这是我的 pom.xml
文件:
<?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>org.springframework</groupId>
<artifactId>gs-serving-web-content</artifactId>
<version>0.1.0</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.2.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<!-- Exclusions to allow SpringBoot execute on HCP -->
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
<exclusion>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-el</artifactId>
</exclusion>
<exclusion>
<artifactId>logback-classic</artifactId>
<groupId>ch.qos.logback</groupId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<properties>
<java.version>1.8</java.version>
<!-- The main class to start by executing java -jar -->
</properties>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<mainClass>hello.Application</mainClass>
<archive>
<manifest>
<addClasspath>true</addClasspath>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
</project>
这是我的 HTML 模板:
<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>Getting Started: Serving Web Content</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
<p th:text="'Hello, ' + ${name} + '!'" />
</body>
</html>
一个项目的结构是
src/main/java/hello/pom.xml
src/main/java/hello/Application.java
src/main/java/hello/GreetingController.java
src/main/resources/templates/greeting.html
原文由 NiHao92 发布,翻译遵循 CC BY-SA 4.0 许可协议
我做了以下更改以使
mvn clean spring-boot:run
工作:pom.xml
移动到根目录,这使得目录层次结构为:目录层次结构:
exclusions
:注释掉的部分:
您似乎打算排除这些依赖项。
mvn clean spring-boot:run
如果排除了嵌入的 tomcat,将成功退出,但我认为这是正确的行为,因为没有用于部署应用程序的容器。不管怎样,你可以试试看,根据你的要求进行修改。