"Negative time" 使用 Maven 构建时出错（在 Netbeans 中）

Question

在 Netbeans 8.0.2 (3.0.5) 中使用 Maven 我得到以下（奇怪的）错误：

Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.3:war (default-war) on project JConnect4Server: Execution default-war of goal org.apache.maven.plugins:maven-war-plugin:2.3:war failed: Negative time -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.3:war (default-war) on project JConnect4Server: Execution default-war of goal org.apache.maven.plugins:maven-war-plugin:2.3:war failed: Negative time
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:225)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
    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:483)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default-war of goal org.apache.maven.plugins:maven-war-plugin:2.3:war failed: Negative time
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:110)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
    ... 19 more
Caused by: java.lang.IllegalArgumentException: Negative time
    at java.io.File.setLastModified(File.java:1427)
    at org.apache.maven.plugin.war.packaging.AbstractWarPackagingTask.copyFile(AbstractWarPackagingTask.java:306)
    at org.apache.maven.plugin.war.packaging.AbstractWarPackagingTask.registered(AbstractWarPackagingTask.java:152)
    at org.apache.maven.plugin.war.util.WebappStructure.registerFile(WebappStructure.java:211)
    at org.apache.maven.plugin.war.packaging.AbstractWarPackagingTask.copyFile(AbstractWarPackagingTask.java:147)
    at org.apache.maven.plugin.war.packaging.AbstractWarPackagingTask.copyFiles(AbstractWarPackagingTask.java:105)
    at org.apache.maven.plugin.war.packaging.AbstractWarPackagingTask.copyFiles(AbstractWarPackagingTask.java:127)
    at org.apache.maven.plugin.war.packaging.WarProjectPackagingTask.handeWebAppSourceDirectory(WarProjectPackagingTask.java:174)
    at org.apache.maven.plugin.war.packaging.WarProjectPackagingTask.performPackaging(WarProjectPackagingTask.java:92)
    at org.apache.maven.plugin.war.AbstractWarMojo.buildWebapp(AbstractWarMojo.java:479)
    at org.apache.maven.plugin.war.AbstractWarMojo.buildExplodedWebapp(AbstractWarMojo.java:412)
    at org.apache.maven.plugin.war.WarMojo.performPackaging(WarMojo.java:213)
    at org.apache.maven.plugin.war.WarMojo.execute(WarMojo.java:175)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
    ... 20 more

首先，错误消息对我来说毫无意义——但真正奇怪的是，在命令行上构建和打包应用程序工作正常，只有在 Netbeans 8.0.2 中调用 Maven 时才会出现问题。

pom 本身看起来像这样：

<?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>de.dhbw.mbfl</groupId>
    <artifactId>JConnect4Server</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <name>JConnect4Server</name>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <repositories>
        <repository>
            <id>sa_viergewinnt_core-mvn-repo</id>
            <url>https://raw.github.com/FlorianLoch/sa_viergewinnt_core/gh-pages/</url>
            <snapshots>
                <enabled>true</enabled>
                <updatePolicy>always</updatePolicy>
            </snapshots>
        </repository>
    </repositories>    

    <dependencies>
        <dependency>
            <groupId>de.dhbw.mbfl</groupId>
            <artifactId>JConnect4Lib</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>        
        <dependency>
            <groupId>com.googlecode.json-simple</groupId>
            <artifactId>json-simple</artifactId>
            <version>1.1.1</version>
        </dependency>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-web-api</artifactId>
            <version>7.0</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.3</version>
                <configuration>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

有没有更有经验的Maven用户可以帮助我？

提前致谢。

更新：Netbeans 和 Maven 使用的 JDK 是：1.8.0_25，VM 外部使用的 JDK 是 1.8.0_31（我读了一些关于这是否可能是 JDK 错误的资料...）。

更新：我更新了VM中的JDK，错误保持不变。

Answer 1

好的，看来我发现错误了。它是由导致 FileNotFound-Exception 的 JDK bug/problem 引起的。这也可以解释为什么使用 Windows.

时会发生错误

简单来说就是没用，因为文件的路径中只有一个space... 所以移动项目解决了问题。使用 Mac OS 不会出现问题。

Answer 2

不确定为什么会出现问题，但找到了解决方案。发生此错误的原因是，您尝试构建的一个或多个文件的时间为负值。（file.getLastModified() returns 为负值）。如果它是一个巨大的项目，可能很难跟踪其中哪一个出了问题。

下面的代码可能会有所帮助：

package com.example;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class ModifyAll {
    public static void main(String[] args) throws IOException {
        List<File> folderList = new ArrayList<>();
        List<File> fileList = new ArrayList<>();

        File folder = new File("D:/Rakhu/Copy/projectfolder/src");
        FileVO baseFileVO = segregateFiles(folder);
        fileList.addAll(baseFileVO.getFileList());
        folderList.addAll(baseFileVO.getFolderList());

        for (int i = 0; i < folderList.size(); i++) {
            FileVO thisVO = segregateFiles(folderList.get(i));
            fileList.addAll(thisVO.getFileList());
            folderList.addAll(thisVO.getFolderList());
        }

        for (int i = 0; i < fileList.size(); i++) {
            Date dte = new Date();
            long milliSeconds = dte.getTime();
            System.out.println("Setting Time For " + fileList.get(i) + " as " + milliSeconds);
            fileList.get(i).setLastModified(milliSeconds);
        }
        System.out.println("Succesfully Modified..!!!");
    }

    public static FileVO segregateFiles(File folder) {
        List<File> folderList = new ArrayList<>();
        List<File> fileList = new ArrayList<>();

        File[] listOfFiles = folder.listFiles();
        for (int i = 0; i < listOfFiles.length; i++) {
            if (listOfFiles[i].isFile()) {
                fileList.add(listOfFiles[i]);
            } else {
                folderList.add(listOfFiles[i]);
            }
            System.out.println(listOfFiles[i]);
        }
        return new FileVO(fileList, folderList);
    }
}



FileVO.java
package com.example;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

public class FileVO {
    List<File> fileList = new ArrayList<>();
    List<File> folderList = new ArrayList<>();

    public FileVO(List<File> fileList, List<File> folderList) {
        this.fileList = fileList;
        this.folderList = folderList;
    }

    public List<File> getFileList() {
        return fileList;
    }

    public void setFileList(List<File> fileList) {
        this.fileList = fileList;
    }

    public List<File> getFolderList() {
        return folderList;
    }

    public void setFolderList(List<File> folderList) {
        this.folderList = folderList;
    }
}

"Negative time" 使用 Maven 构建时出错（在 Netbeans 中）

"Negative time" error when building with Maven (in Netbeans)

netbeans

maven