Question

运行我的jar文件时：java -jar target / places-1.0-SNAPSHOT.jar我遇到下一个错误：

no main manifest attribute, in target/places-1.0-SNAPSHOT.jar

我的pom.xml包含spring-boot-maven-plugin：

 <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <mainClass>com.places.Main</mainClass>
            </configuration>
 </plugin>

我还尝试创建MANIFEST.MF FILE并指定该类，但是它没有帮助。

此外，我也尝试过：

<properties>
      <!-- The main class to start by executing "java -jar" -->
      <start-class>com.places.Main</start-class>
</properties>

我的主要人：

@SpringBootApplication
 public class Main {
public static void main(String[] args) throws InterruptedException {
    SpringApplication.run(Main.class,args);
  }
  }

你知道我还能尝试什么吗？

Answer 1

尝试将<!DOCTYPE html> <html> <head> <link rel="stylesheet" type="text/css" href="salvattore.js"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous"> <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.3.1/css/all.css" integrity="sha384-mzrmE5qonljUremFsqc01SB46JvROS7bZs3IO2EmfFsd15uHvIt+Y8vEf7N7fWAU" crossorigin="anonymous"> <link rel="stylesheet" type="text/css" href="style.css"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>All Things Pink!</title> </head> <body> <nav class="navbar navbar-inverse navbar-fixed-top"> <div class="container"> <div class="navbar-header"> <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-nav-demo" aria-expanded="false"> <span class="sr-only">Toggle navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <a class="navbar-brand" href="#"><span class="glyphicon glyphicon-picture" aria-hidden="true">PINKI</a> </div> <div class="collapse navbar-collapse" id="bs-nav-demo"> <ul class="nav navbar-nav"> <li><a href="#">About</a></li> <li><a href="#">Contact</a></li> </ul> <ul class="nav navbar-nav navbar-right"> <li><a href="#">Sign Up</a></li> <li><a href="#">Login</a></li> </ul> </div> </div> </nav> <div class="container"> <div class="jumbotron"> <h1><span class="glyphicon glyphicon-camera" aria-hidden="true"></span> The Image Gallery</h1> <p>Random beautiful images of my favorite color.. pink!</p> </div> <div id="grid" data-columns> <div class="column size-1of3"> <div> <img src="https://images.unsplash.com/photo-1496193574520-069d8f5c945e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=60"> </div> <div> <img 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src="https://images.unsplash.com/photo-1525268771113-32d9e9021a97?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=800&q=80"> </div> <div> <img src="https://images.unsplash.com/photo-1501436513145-30f24e19fcc8?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1268&q=80"> </div> <div> <img src="https://images.unsplash.com/photo-1498588113594-33ad5b4d19b4?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1268&q=80"> </div> <div> <img src="https://images.unsplash.com/photo-1496372412473-e8548ffd82bc?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1475&q=80"> </div> <div> <img src="https://images.unsplash.com/photo-1490395930356-7e64acf16e23?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=633&q=80"> </div> <div> <img src="https://images.unsplash.com/photo-1479912649391-55173fe33de4?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=60"> </div> <div> <img src="https://images.unsplash.com/photo-1516826049371-1e7856387270?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1050&q=80"> </div> <div> <img src="https://images.unsplash.com/photo-1514542996715-a1ff9ccfb039?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=60"> </div> </div> </div> </div> <script src="http://code.jquery.com/jquery-2.2.4.js" integrity="sha256-iT6Q9iMJYuQiMWNd9lDyBUStIq/8PuOW33aOqmvFpqI=" crossorigin="anonymous"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script> <script src="salvattore.js"></script> </body>个目标添加到执行目标中。否则，您将需要显式调用repackage插件。添加目标后，您只需致电mvn package spring-boot:repackage。

mvn package

Answer 2

在 Maven package阶段，通过 Spring Boot Maven插件和原始的增强了 jar 档案jar 文件（应该不使用标准 maven-jar-plugin 构建文件）被替换为增强 可执行文件 罐子。

因此，在构建模块时，您必须自己发布spring-boot:repackage目标：

mvn package spring-boot:repackage

或在插件配置中显式添加goal：

<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <configuration>
        <mainClass>com.places.Main</mainClass>
    </configuration>
    <executions>
        <execution>
            <goals>
                <goal>repackage</goal>
            </goals>
        </execution>
    </executions>
</plugin>

您可以在官方文档中找到有关 Spring Boot Maven插件 repackage goal的更多详细信息。

Answer 3

{{ current_time |date:"b d Y f a T" }}

Reback your jar or war using the following command

mvn package spring-boot:repackage

Add the plugin in plugins parent node like below in pom.xml

Answer 4

您可以指定一个父POM，例如：

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

在打包目标期间，将执行重新打包目标，然后您将获得一个可执行的jar

Answer 5

3件事：
-您的pom中有父项。
-确认您的插件在pom的构建部分中。
-您有一个带有@SpringBootApplicaion批注的类。

pom.xml：

...  
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.8.RELEASE</version>
  </parent>

   <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>
...

还有一个看起来像这样的类：

@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

}

Answer 6

Add the plugin below.This worked for me

 <plugin>
                           <groupId>org.apache.maven.plugins</groupId>
                           <artifactId>maven-shade-plugin</artifactId>
                           <version>1.6</version>
                           <executions>
                                 <!-- Run shade goal on package phase -->
                                 <execution>
                                        <phase>package</phase>
                                        <goals>
                                               <goal>shade</goal>
                                        </goals>

                                        <configuration>
                                               <transformers>
                                                     <!-- add Main-Class to manifest file -->
                                                     <transformer
                                                            implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                                            <mainClass>MainClass</mainClass>
                                                            <manifestEntries>
                                                                   <Class-Path>.</Class-Path>
                                                            </manifestEntries>
                                                     </transformer>
                                                     <transformer
                                                            implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                                            <resource>META-INF/spring.handlers</resource>
                                                     </transformer>
                                                     <transformer
                                                            implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                                            <resource>META-INF/spring.schemas</resource>
                                                     </transformer>
                                               </transformers>

                                        </configuration>
                                 </execution>
                           </executions>
                    </plugin>

SpringBoot没有主清单属性（Maven）

6 个答案: