[英]Java unable to open main class and jar file
I've written a Java chat application using client/server architecture. 我已经使用客户端/服务器架构编写了Java聊天应用程序。 As a build tool I've used Maven. 作为构建工具,我使用了Maven。 The server side interface is based on command-line and the problem is that I can't run the application by cmd neither with command 服务器端界面是基于命令行的,问题是我无法使用cmd来运行应用程序
java Main
from {basedir}/target/classes (Main is my main class), nor with command opening the jar file 来自{basedir} / target / classes(Main是我的主类),也不能通过命令打开jar文件
java -jar ChatServer-1.0-SNAPSHOT
form {basedir}/target. 表格{basedir} / target。 I haven't created any packages for my classes, they are placed in {basedir}/src/main/java directory. 我没有为我的课程创建任何软件包,它们被放置在{basedir} / src / main / java目录中。 When I try load my Main class, this is the output: 当我尝试加载我的Main类时,这是输出:
Error: Could not find or load main class Main
When I try to open my jar file, this is the output: 当我尝试打开jar文件时,输出为:
Unable to access jarfile ChatServer-1.0-SNAPSHOT
The whole project runs really well when I run it in IntelliJ. 当我在IntelliJ中运行它时,整个项目运行得非常好。 What am I doing wrong? 我究竟做错了什么?
Edit: 编辑:
I've moved my classes to pl.dsdev.server package, when I run 运行时,我已将类移至pl.dsdev.server包中
java -jar ChatServer-1.0-SNAPSHOT.jar
this is the output: 这是输出:
no main manifest attribute, in ChatServer-1.0-SNAPSHOT.jar
My pom.xml: 我的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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>pl.dsdev.projects</groupId>
<artifactId>ChatServer</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>pl.dsdev.server.Main</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
Okey, it is working now. Okey,现在正在运作。 I don't know what was the reason, but after I did 我不知道是什么原因,但之后
mvn clean package
and tried to run it again it finally worked. 并尝试再次运行它终于成功了。
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