MissingResourceException:找不到基本名称 resources.controls.controls_res 的包,语言环境 en

MissingResourceException: Can't find bundle for base name resources.controls.controls_res, locale en

我不明白这是什么问题,为什么他发誓找不到locale en。路径或 boundle 名称有问题吗?

legacy项目,15年前写的,以前在 Ant,现在翻译成Gradle,出现这个错误。它建立在 Ant 之上没有问题。

P.S。我在 类.

中分别标记了错误所指的行

错误:

java.lang.ExceptionInInitializerError
    at org.opensourcephysics.controls.OSPLog.<init>(OSPLog.java:937)
    at org.opensourcephysics.controls.OSPLog.getOSPLog(OSPLog.java:124)
    at org.opensourcephysics.cabrillo.tracker.Tracker.loadPreferences(Tracker.java:1391)
    at org.opensourcephysics.cabrillo.tracker.Tracker.<clinit>(Tracker.java:251)
Caused by: java.util.MissingResourceException: Can't find bundle for base name org.opensourcephysics.resources.controls.controls_res, locale en
Caused by: java.util.MissingResourceException: Can't find bundle for base name org.opensourcephysics.resources.controls.controls_res, locale en

    at java.util.ResourceBundle.throwMissingResourceException(ResourceBundle.java:1581)
    at java.util.ResourceBundle.getBundleImpl(ResourceBundle.java:1396)
    at java.util.ResourceBundle.getBundle(ResourceBundle.java:854)
    at org.opensourcephysics.controls.ControlsRes.<clinit>(ControlsRes.java:55)
    ... 4 more
Caused by: java.lang.NullPointerException
    at java.util.Properties$LineReader.readLine(Properties.java:434)
    at java.util.Properties.load0(Properties.java:353)
    at java.util.Properties.load(Properties.java:341)
    at java.util.PropertyResourceBundle.<init>(PropertyResourceBundle.java:138)
    at org.opensourcephysics.resources.controls.controls_res.<init>(controls_res.java:32)
    at org.opensourcephysics.resources.controls.controls_res.<init>(controls_res.java:23)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at java.lang.Class.newInstance(Class.java:442)
    at java.util.ResourceBundle$Control.newBundle(ResourceBundle.java:2662)
Caused by: java.lang.NullPointerException

    at java.util.ResourceBundle.loadBundle(ResourceBundle.java:1518)
    at java.util.ResourceBundle.findBundle(ResourceBundle.java:1482)
    at java.util.ResourceBundle.findBundle(ResourceBundle.java:1436)
    at java.util.ResourceBundle.getBundleImpl(ResourceBundle.java:1370)
    ... 6 more
Exception in thread "main" 
Execution failed for task ':Tracker.main()'.

从日志可以看出,所有的错误都是因为找不到*locale en *.

Класс controls_res:

public class controls_res extends PropertyResourceBundle {
  // relative path to strings
  static String res = "controls_res.properties"; //$NON-NLS-1$

  /**
   * Constructor tools
   * @throws IOException
   */
  public controls_res() throws IOException {
    this(controls_res.class.getResourceAsStream(res)); 23 STRING!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
  }

  /**
   * Constructor tools
   * @param stream
   * @throws IOException
   */
  public controls_res(InputStream stream) throws IOException {
    super(stream);  // 32 STRING!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
  }
}

Class controls_res_en:

/**
 * English resource loader for OSP controls class.  Resource strings are obtained from superclass.
 * @author Wolfgang Christian
*/
public class controls_res_en extends controls_res {
  /**
   * Constructor controls_res_en
   * @throws IOException
   */
  public controls_res_en() throws IOException {
    super();
  }
}

Class ControlsRes:

public class ControlsRes {
  // static constants for speed
  public static String ANIMATION_NEW;
  public static String ANIMATION_INIT;
  public static String ANIMATION_STEP;
  public static String ANIMATION_RESET;
  public static String ANIMATION_START;
  public static String ANIMATION_STOP;
  public static String ANIMATION_RESET_TIP;
  public static String ANIMATION_INIT_TIP;
  public static String ANIMATION_START_TIP;
  public static String ANIMATION_STOP_TIP;
  public static String ANIMATION_NEW_TIP;
  public static String ANIMATION_STEP_TIP;
  public static String CALCULATION_CALC;
  public static String CALCULATION_RESET;
  public static String CALCULATION_CALC_TIP;
  public static String CALCULATION_RESET_TIP;
  public static String XML_NAME;
  public static String XML_VALUE;
  static final String BUNDLE_NAME = "org.opensourcephysics.resources.controls.controls_res"; //$NON-NLS-1$
  static ResourceBundle res;

  // private constructor because all methods are static
  private ControlsRes() {}

  static {
    String language = Locale.getDefault().getLanguage();
    Locale resourceLocale = Locale.ENGLISH;
    for(Locale locale : OSPRuntime.getInstalledLocales()) {
      if(locale.getLanguage().equals(language)) {
        resourceLocale = locale;
        break;
      }
    }
    res = ResourceBundle.getBundle(BUNDLE_NAME, resourceLocale); // 55 String!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    setLocalStrings();
  }

  private static String getString(final ResourceBundle bundle, final String key) {
    try {
      return bundle.getString(key);
    } catch(final MissingResourceException ex) {
      return '|'+key+'|';
    }
  }

  public static void setLocale(Locale locale) {
    res = ResourceBundle.getBundle(BUNDLE_NAME, locale);
    setLocalStrings();
  }

  /**
   * Gets the localized value of a string. If no localized value is found, the
   * key is returned surrounded by exclamation points.
   *
   * @param key the string to localize
   * @return the localized string
   */
  static public String getString(String key) {
    try {
      return res.getString(key);
    } catch(MissingResourceException ex) {
      return "!"+key+"!"; //$NON-NLS-1$ //$NON-NLS-2$
    }
  }

  /**
  * Gets the local strings.  Static strings are used for speed to avoid having to call the resource object.
  */
  private static void setLocalStrings() {
    ANIMATION_NEW = getString(res, "ANIMATION_NEW");                 //$NON-NLS-1$
    ANIMATION_INIT = getString(res, "ANIMATION_INIT");               //$NON-NLS-1$
    ANIMATION_STEP = getString(res, "ANIMATION_STEP");               //$NON-NLS-1$
    ANIMATION_RESET = getString(res, "ANIMATION_RESET");             //$NON-NLS-1$
    ANIMATION_START = getString(res, "ANIMATION_START");             //$NON-NLS-1$
    ANIMATION_STOP = getString(res, "ANIMATION_STOP");               //$NON-NLS-1$
    ANIMATION_RESET_TIP = getString(res, "ANIMATION_RESET_TIP");     //$NON-NLS-1$
    ANIMATION_INIT_TIP = getString(res, "ANIMATION_INIT_TIP");       //$NON-NLS-1$
    ANIMATION_START_TIP = getString(res, "ANIMATION_START_TIP");     //$NON-NLS-1$
    ANIMATION_STOP_TIP = getString(res, "ANIMATION_STOP_TIP");       //$NON-NLS-1$
    ANIMATION_NEW_TIP = getString(res, "ANIMATION_NEW_TIP");         //$NON-NLS-1$
    ANIMATION_STEP_TIP = getString(res, "ANIMATION_STEP_TIP");       //$NON-NLS-1$
    CALCULATION_CALC = getString(res, "CALCULATION_CALC");           //$NON-NLS-1$
    CALCULATION_RESET = getString(res, "CALCULATION_RESET");         //$NON-NLS-1$
    CALCULATION_CALC_TIP = getString(res, "CALCULATION_CALC_TIP");   //$NON-NLS-1$
    CALCULATION_RESET_TIP = getString(res, "CALCULATION_RESET_TIP"); //$NON-NLS-1$
    XML_NAME = getString(res, "XML_NAME");                           //$NON-NLS-1$
    XML_VALUE = getString(res, "XML_VALUE");                         //$NON-NLS-1$
  }
}

Gradle 不会复制位于 src/main/java 文件夹中的 属性 文件。你有两个选择。

1.选项: 将以下脚本添加到 build.gradle。它会在 java 编译后 运行 并将所有 属性 文件复制到构建目录中。选择此选项以避免更改文件位置。

compileJava.doLast {
    copy {
        from "src/main/java"
        include "**/*.properties"
        into "$buildDir/classes/java/main"
    }
}

建议(我也同意)processResources 任务 运行 是独立的,尽管任何 java 代码都没有改变。 compileJava.doLast 运行s 只有java 代码需要编译阶段,稳定性有差距。因此,第一个选项选择以下脚本。

processResources {
    from(sourceSets.main.java.srcDirs) {
        include '**/*.properties'
    }
}

2。选项: 将 属性 文件移动到资源文件夹 src/main/resources。选择此选项以获得最佳布局结构。非编译文件应位于资源文件夹中。

should be the perfect solution: I would also recommend to move all resources files to the conventional location under src/main/resources. FWIW, this section of the Gradle docs 中的选项 2 解释了源集如何区分 Java 源文件和其他资源。

但是,如果您不能将属性文件移动到新位置,那么 比 İsmail 的选项 1 更好的解决方案是更改 processResources 任务 src/main/java:

复制属性文件
processResources {
    from(sourceSets.main.java.srcDirs) {
        include '**/*.properties'
    }
}

这样做有以下优点:

  1. 你的 compileJava 任务将只负责编译,当没有变化时它可以安全地决定成为 UP-TO-DATE。根据 İsmail 的回答,compileJava 任务可能 always 运行 即使没有变化:Gradle 看到任务的输出目录是脏(因为有它不知道的属性文件)因此将重新运行 整个编译是为了安全起见。这显然是对构建时间和计算资源的浪费。
  2. 为此目的(processResources)使用常规任务复制资源。

我不明白 control_rescontrol_res_en 在那种情况下的作用。将相应的 *.properties 文件放在适当的位置并通过 ResourceBundle API 加载它们就足够了; 类 在我眼里已经过时了。

当然,对于 Gradle(或 Maven,如果这也是一个选项),必须将属性文件存储为资源(通常在 /src/main/resources 下),或者相应地调整构建过程,否则文件不会进入最终的 jar …


但据我了解,真正的问题是由线路引起的

this(controls_res.class.getResourceAsStream(res)); 

来自 control_res 中的构造函数。 res 的值为 control_res.properties;这意味着(根据提供的屏幕截图),程序在文件夹 ~/org/opensourcephysics/resources/controls 中查找属性文件(参见 here),但从同一屏幕截图来看,文件似乎存储在~/org/opensourcephysics/resources/controls/Resource Bundle 'controls_res'(一个相当奇怪的名字,我不得不说,但这就是屏幕截图的样子......)。

令人讨厌的是 Class.getResourceAsStream() 只会 return null 以防请求的资源丢失......

创建了新的空文件并重写了相同文件的内容 - 问题消失了。显然,文件编码收集器无法读取。毕竟遗留项目已经转手100次了