从 Ant 创建的可执行 jar 文件不起作用

Question

我正在尝试使用 Ant 创建一个可执行（双击）jar。我的课程是 ChatClient 和 ChatServer，这是一个简单的多线程聊天服务器。我在阅读教程后创建了 build.xml，但这里似乎有问题。 我得到的错误是， 错误：无法找到或加载主类 C:...（jar 文件的路径）

我的项目名称是 JamesPractice，包名称是 SimpleChat。类是 SimpleChatServer 和 SimpleChatClient

<?xml version="1.0"?>
<project name = "JamesPractice" default= "jar" basedir =".">
<property name = "src.dir" location = "src" />
<property name = "build.dir" location = "c:\Build" />
<property name = "project.name" value = "JamesPractice" />
<property name="lib.dir" location="lib" />

<target name = "clean">
    <delete dir="${build.dir}" />
</target>

<target name = "makedir">
    <mkdir dir= "${build.dir}" />
    <mkdir dir= "${build.dir}\classes" />
</target>

<target name = "compile" depends = "clean, makedir">
    <javac srcdir = "${src.dir}" destdir = "${build.dir}\classes" />
</target>

<target name = "jar" depends = "compile">
    <jar destfile = "${build.dir}/jars/${ant.project.name}.jar" basedir = "${build.dir}/classes" />
    <manifest file = "MANIFEST.MF">
        <attribute name = "Main-Class" value = "SimpleChat.SimpleChatServer"/>
        <attribute name = "Class-Path" value = "."/>
    </manifest>

</target>

MANIFEST.MF
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.9.2
Created-By: 1.7.0_11-b21 (Oracle Corporation)
Main-Class: SimpleChat.SimpleChatClient

---

已编辑 我已经合并了两个类，它工作正常。但 .jar 仍然给我同样的错误.. 用 HelloWorld 进行测试，看看我是否可以让它工作......

Answer 1

将“清单”部分移到 ... 标签下：

<target name = "jar" depends = "compile">
    <jar destfile = "${build.dir}/jars/${ant.project.name}.jar" basedir = "${build.dir}/classes">
        <manifest file = "MANIFEST.MF">
            <attribute name = "Main-Class" value = "SimpleChat.SimpleChatServer"/>
            <attribute name = "Class-Path" value = "."/>
        </manifest>
    </jar>
</target>

而且最好使用 Maven 而不是老式的 Ant。 Maven 几年前成为行业标准。