如何使用 Ant 创建捆绑的可运行 jar [英] how to create a bundled runnable jar using Ant
问题描述
我查看了这个问题，但它并没有真正解决我的问题，所以我想我会发布一个新的.
I looked at this question, but it didn't really solve my problem, so I figured I'd post a new one.
我需要使用 Ant 创建一个可运行的 jar(只需双击即可运行).我有以下 java 代码和 build.xml 文件，它可以很好地编译代码并创建一个 jar 文件，但是当我尝试通过双击运行 jar 时，我收到一条消息说找不到主类:HttpController.爪哇."
I need to create a runnable jar (runnable simply by double clicking) using Ant. I have the following java code and build.xml file, which compiles the code just fine and creates a jar file, but when I try to run the jar by double clicking, i get a message saying "Could not find main class: HttpController.java."
我怀疑我的问题与加载外部 Apache Http.jar 有关，因为我已经成功地为一个相同的项目构建并运行了一个 jar，只是它没有引用任何外部 jar.
I have the suspicion that my problem has to do with loading the external Apache Http.jar, as I have successfully built and run a jar for a project that is identical, except that it does not reference any external jars.
这是我的代码:
HttpController.java:
HttpController.java:
package pack;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.HttpMessage;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
public class HttpController {
public static void main(String[] args) {
DefaultHttpClient client = new DefaultHttpClient();
HttpHost httphost = new HttpHost("localhost", 80);
try {
HttpMessage req = new HttpGet("/test.html");
HttpResponse resp = client.execute(httphost, (HttpGet) req);
HttpEntity entity = resp.getEntity();
BufferedReader in = new BufferedReader(new InputStreamReader(
entity.getContent()));
String line = null;
while ((line = in.readLine()) != null) {
System.out.println(line);
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
// shutdown the connection
client.getConnectionManager().shutdown();
}
}
}
build.xml:
<?xml version="1.0" encoding="ISO-8859-1"?>
<project name="Test" basedir="." default="jar">
<property name="source.dir" value="src"/>
<property name="lib.dir" value="lib"/>
<property name="class.dir" value="bin"/>
<property name="jar.dir" value="dist"/>
<property name="main-class" value="pack.HttpController"/>
<path id="libraries.path">
<fileset dir="${lib.dir}">
<include name="*.jar"/>
</fileset>
</path>
<target name="clean" description="delete old files">
<delete dir="${class.dir}"/>
<delete dir="${jar.dir}"/>
</target>
<target name="compile" description="build class files" depends="clean">
<mkdir dir="${class.dir}"/>
<javac srcdir="${source.dir}" destdir="${class.dir}">
<classpath refid="libraries.path"/>
</javac>
</target>
<target name="jar" depends="compile">
<mkdir dir="${jar.dir}"/>
<mkdir dir="${jar.dir}/${lib.dir}"/>
<copy todir="${jar.dir}/${lib.dir}" flatten="true">
<path refid="libraries.path"/>
</copy>
<jar destfile="${jar.dir}/${ant.project.name}.jar" basedir="${class.dir}">
<manifest>
<attribute name="Main-Class" value="${main-class}"/>
<attribute name="Class-Path" value="${jar.dir}/${lib.dir}/Apache HTTP.jar"/>
</manifest>
</jar>
</target>
<target name="run" depends="jar">
<java jar="${jar.dir}/${ant.project.name}.jar" fork="true"/>
</target>
</project>
MANIFEST.MF:
MANIFEST.MF:
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.8.3
Created-By: 1.6.0_31-b05 (Sun Microsystems Inc.)
Main-Class: HttpController
Class-Path: dist/lib
EDIT build.xml 已根据 Mike 的回答进行了更新.问题还是没有解决.根据 Danation 的回答，还发布了清单文件的内容.
EDIT build.xml has been updated as per Mike's answer. Problem is still not solved. Also posted contents of manifest file, as per Danation's answer.
推荐答案
Snip...
我重新设计了您的 build.xml 文件，以将库正确包含在 jar 文件和清单类路径中.我假设您的apache http.jar"文件是 Apache Core 的包装器，其中包含用于 apache 客户端等的其他几个 jar 文件.
I have reworked your build.xml file to properly include the libraries in the jar file and in the Manifest classpath. I'm assuming that your "apache http.jar" file is a wrapper for Apache Core, and contains several other jar files in it for the apache client, etc.
build.xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<project name="Test" basedir="." default="jar">
<property name="source.dir" value="src"/>
<property name="lib.dir" value="lib"/>
<property name="class.dir" value="bin"/>
<property name="jar.dir" value="dist"/>
<property name="jar.file" value="${jar.dir}/${ant.project.name}.jar"/>
<property name="main-class" value="pack.HttpController"/>
<path id="libraries.path">
<fileset dir="${lib.dir}">
<include name="*.jar"/>
</fileset>
</path>
<target name="clean" description="delete old files">
<delete dir="${class.dir}"/>
<delete dir="${jar.dir}"/>
</target>
<target name="compile" description="build class files" depends="clean">
<mkdir dir="${class.dir}"/>
<javac srcdir="${source.dir}" destdir="${class.dir}">
<classpath refid="libraries.path"/>
</javac>
</target>
<target name="jar" depends="compile">
<mkdir dir="${jar.dir}"/>
<mkdir dir="${class.dir}/${lib.dir}"/>
<copy todir="${class.dir}/${lib.dir}" flatten="true">
<path refid="libraries.path"/>
</copy>
<manifestclasspath property="manifest.classpath" jarfile="${jar.file}">
<classpath refid="libraries.path"/>
</manifestclasspath>
<jar destfile="${jar.file}" basedir="${class.dir}">
<manifest>
<attribute name="Main-Class" value="${main-class}"/>
<attribute name="Class-Path" value="${manifest.classpath}"/>
</manifest>
</jar>
</target>
<target name="run" depends="jar">
<java jar="${jar.dir}/${ant.project.name}.jar" fork="true"/>
</target>
</project>
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