我整个下午都在研究如何运行我正在开发的 Spring Boot 应用程序的 JAR。
通过mvn clean package命令生成JAR。 JAR 是在 target 文件夹内生成的，因此我在此文件夹中运行 CMD 并输入 java -jar apptest.jar 然后我得到
Error: Could not find or load main class br.com.myapp.Application
当我直接在 Eclipse 上运行该应用程序时，它运行得很好。
你能帮我吗？
pom.xml
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.4.RELEASE</version>
<relativePath />
</parent>
<groupId>br.com.braxxy.adm</groupId>
<artifactId>brxmind</artifactId>
<version>0.0.1</version>
<name>brxmind</name>
<description>Redmine like Applicaiton for Project Management</description>
<packaging>${project.packaging}</packaging>
<properties>
<java.version>1.8</java.version>
<start-class>br.com.braxxy.Application</start-class>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.thymeleaf.extras</groupId>
<artifactId>thymeleaf-extras-springsecurity5</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-core</artifactId>
<type>jar</type>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-core</artifactId>
<version>2.2</version>
<scope>test</scope>
</dependency>
</dependencies>
<profiles>
<profile>
<id>dev</id>
<activation>
<activeByDefault>true</activeByDefault>
</activation>
<properties>
<activatedProperties>dev</activatedProperties>
<project.packaging>jar</project.packaging>
</properties>
<build>
<finalName>${project.artifactId}</finalName>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-help-plugin</artifactId>
<executions>
<execution>
<id>show-profiles</id>
<phase>compile</phase>
<goals>
<goal>active-profiles</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</pluginManagement>
</build>
</profile>
<profile>
<id>prod</id>
<properties>
<activatedProperties>prod</activatedProperties>
<project.packaging>war</project.packaging>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>${project.artifactId}</finalName>
</build>
</profile>
</profiles>
<pluginRepositories>
<pluginRepository>
<id>central</id>
<name>Central Repository</name>
<url>https://repo.maven.apache.org/maven2</url>
<layout>default</layout>
<snapshots>
<enabled>false</enabled>
</snapshots>
<releases>
<updatePolicy>never</updatePolicy>
</releases>
</pluginRepository>
</pluginRepositories>
<repositories>
<repository>
<id>central</id>
<name>Central Repository</name>
<url>https://repo.maven.apache.org/maven2</url>
<layout>default</layout>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
</project>
Application.java
package br.com.myapp;
import java.io.File;
import java.util.Locale;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
import org.springframework.context.annotation.Bean;
import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.web.servlet.LocaleResolver;
import org.springframework.web.servlet.i18n.SessionLocaleResolver;
@SpringBootApplication
public class Application extends SpringBootServletInitializer {
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(Application.class);
}
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
@Bean
public LocaleResolver localeResolver() {
SessionLocaleResolver slr = new SessionLocaleResolver();
slr.setDefaultLocale(new Locale("pt", "BR"));
return slr;
}
@Bean
CommandLineRunner init(SystemRoleRepository systemRoleRepository, ProjectRoleRepository projectRoleRepository) {
return args -> {
for (ESystemRole role : ESystemRole.values()) {
SystemRole systemRole = systemRoleRepository.findByRole(role.toString());
if (systemRole == null) {
SystemRole newSystemRole = new SystemRole();
newSystemRole.setRole(role.toString());
systemRoleRepository.save(newSystemRole);
}
}
for (EProjectRole role : EProjectRole.values()) {
ProjectRole projectRole = projectRoleRepository.findByRole(role.toString());
if (projectRole == null) {
ProjectRole newProjectRole = new ProjectRole();
newProjectRole.setRole(role.toString());
projectRoleRepository.save(newProjectRole);
}
}
};
}
}
MANIFEST.MF
Manifest-Version: 1.0
Implementation-Title: myapp
Implementation-Version: 0.0.1
Build-Jdk-Spec: 1.8
Created-By: Maven Jar Plugin 3.2.0
Main-Class: br.com.myapp.Application
最佳答案
要使用 Spring Boot Maven 插件，请在 pom.xml 的插件部分中包含相应的 XML，如以下示例所示:
<project>
<modelVersion>4.0.0</modelVersion>
<artifactId>getting-started</artifactId>
<!-- ... -->
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
构建:
mvn clean package
运行:
java -jar target/brxmind.jar
输出:
...
2021-07-29 07:53:43.557 INFO 18739 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2021-07-29 07:53:43.576 INFO 18739 --- [ main] br.com.braxxy.Application : Started Application in 2.112 seconds (JVM running for 2.476)
关于java - 错误: Could not find or load main class - When running a JAR at the prompt，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/68550489/