运行jar时Gradle NoClassDefFoundError

Question

package com.veltes;

import org.apache.velocity.app.VelocityEngine;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.exception.MethodInvocationException;
import org.apache.velocity.exception.ParseErrorException;
import org.apache.velocity.exception.ResourceNotFoundException;
import org.apache.velocity.runtime.RuntimeConstants;
import org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader;

import java.io.*;

public class velotest {
    public static void main(String[] args) {

        try {
            VelocityEngine ve = new VelocityEngine();
            ve.setProperty(RuntimeConstants.RESOURCE_LOADER, "classpath");
            ve.setProperty("classpath.resource.loader.class", ClasspathResourceLoader.class.getName());
            ve.init();
            VelocityContext context = new VelocityContext();
            context.put("name", "World");
            Template t = ve.getTemplate("com/veltes/velotest.vm");
            StringWriter writer = new StringWriter();
            t.merge(context, writer);
            System.out.println(writer.toString());

            File logFile = new File("C:/users/xxxx/Desktop/velotest.html");

            try {
                writeFile(logFile, t, context);
            }
            catch (IOException io) {
            }
        } catch (Exception e) {
        }

    }

    private static void writeFile(File logFile, Template t, VelocityContext context) throws IOException {
        Writer logWriter;

        logWriter = new BufferedWriter(new FileWriter(logFile));
        try {
            t.merge(context, logWriter);
        }
        catch (ResourceNotFoundException rnfe) {
        }
        catch (ParseErrorException pee) {
        }
        catch (MethodInvocationException mie) {
        }
        catch (Exception e) {
        }
        logWriter.flush();
        logWriter.close();
    }

}

group 'velocitytest'
version '1.0-SNAPSHOT'

apply plugin: 'groovy'
apply plugin: 'java'

sourceCompatibility = 1.5

repositories {
    mavenCentral()
    mavenLocal()
}

dependencies {
    compile 'org.codehaus.groovy:groovy-all:2.3.11'
    testCompile group: 'junit', name: 'junit', version: '4.11'

    compile 'velocity:velocity:1.4'
}

现在，当我运行Gradle Assemble和Gradle Build时，一切都很好，但是当我尝试运行项目时（在build/libs/中运行构建的jar和在IntelliJ中运行velotest类时也是如此），我会得到以下错误:

线程“main”java.lang.noClassDefFounderror：org/apache/commons/collections/extendedProperties
在org.apache.velocity.runtime.runtime.runtimeInstance. (runtimeInstance.java:183)
在org.apache.velocity.app.velocityEngine.(velocityEngine.(velocityEngine.(velocityEngine.(velocityEngine.java:60)在java:62)
在sun.reflect.delegatingMethodAccessorImpl.invoke（delegatingMethodAccessorImpl.java:43)
在java.lang.reflect.Method.invoke（Method.java:497)
在com.intellij.rt.execution.application.appmain.main(appmain.java:147)
在java.net.urlClassLoader.findclass（misc.launcher$AppClassLoader.LoadClass(launcher.java:331)
在java.lang.classloader.loadClass(classloader.java:357)
...8个以上

在build/tmp/

中没有jar有点奇怪，你们中有人知道解决方案吗？

Answer 1

如果希望能够运行jar，则需要创建一个可运行的jar。

您可以使用shadojar插件或扩展jar任务来将运行时deps打包到工件中。

jar {
    archiveName = 'Name.jar'

    manifest {
        attributes 'Main-Class': 'your.main.class',
                'Class-Path': configurations.runtime.files.collect { "lib/$it.name" }.join(' '),
                'Implementation-Version': project.version
    }

    from(configurations.compile.collect { it.isDirectory() ? it : zipTree(it) }) {}
}

对于intelliJ问题：

apply plugin: 'idea'