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运行jar时Gradle NoClassDefFoundError

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我正在尝试设置一个包含一些Velocity函数的Gradle项目 .

到目前为止,我有以下文件:

src/main/java/com/veltes/velotest.java:

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();
    }

}

build.gradle:

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 assemblegradle build 时一切都很好,但是当我尝试运行项目时(同样用于在build / libs /中运行构建的jar并运行IntelliJ中的velotest类),我收到以下错误:

org.apache.velocity中org.apache.velocity.runtime.RuntimeInstance . <init>(RuntimeInstance.java:183)中的线程“main”java.lang.NoClassDefFoundError:org / apache / commons / collections / ExtendedProperties中的异常 . com.VelocityEngine . (VelocityEngine.java:60)at com.veltes.velotest.main(velotest.java:23)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java) :62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:497)at com.intellij.rt.execution.application.AppMain.main( AppMain.java:147)引起:java.lang.ClassNotFoundException:org.apache.commons.collections.ExtendedProperties at java.net.URLClassLoader.findClass(URLClassLoader.java:381)at java.lang.ClassLoader.loadClass(ClassLoader . java:424)at sun.misc.Launcher $ AppClassLoader.loadClass(Launcher.java:331)at java.lang.ClassLoader.loadClass(ClassLoader.java:357) . ..还有8个

在build / tmp /中没有jar有点奇怪

你们中有谁知道解决方案吗?

1 回答

  • 1

    如果您想要运行它,则需要创建一个可运行的jar .

    您可以使用shadojar插件或扩展jar任务以将运行时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'
    

    然后运行 gradle idea 任务,这将刷新项目中的.iws .ipr .iml文件并同步类路径 . 或者,如果您使用intelliJ支持(这还不是理想的),请尝试在那里刷新它 . 我认为在2017.1.3版本中,gradle集成更好一些 .

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