本文整理了Java中java.lang.Class.getDeclaredFields()方法的一些代码示例，展示了Class.getDeclaredFields()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Class.getDeclaredFields()方法的具体详情如下：
包路径：java.lang.Class
类名称：Class
方法名：getDeclaredFields

Class.getDeclaredFields介绍

[英]Returns an array containing Field objects for all fields declared in the class represented by this Class. If there are no fields or if this Class represents an array class, a primitive type or void then an empty array is returned.
[中]返回一个数组，该数组包含该类表示的类中声明的所有字段的字段对象。如果没有字段，或者该类表示数组类、基元类型或void，则返回空数组。

代码示例

代码示例来源：origin: prestodb/presto

/**
 * @since 2.7
 */
public static Field[] getDeclaredFields(Class<?> cls) {
  return cls.getDeclaredFields();
}

代码示例来源：origin: redisson/redisson

/**
 * @since 2.7
 */
public static Field[] getDeclaredFields(Class<?> cls) {
  return cls.getDeclaredFields();
}

代码示例来源：origin: spring-projects/spring-framework

/**
 * We need to detect this as "code-style" AspectJ aspects should not be
 * interpreted by Spring AOP.
 */
private boolean compiledByAjc(Class<?> clazz) {
  // The AJTypeSystem goes to great lengths to provide a uniform appearance between code-style and
  // annotation-style aspects. Therefore there is no 'clean' way to tell them apart. Here we rely on
  // an implementation detail of the AspectJ compiler.
  for (Field field : clazz.getDeclaredFields()) {
    if (field.getName().startsWith(AJC_MAGIC)) {
      return true;
    }
  }
  return false;
}

代码示例来源：origin: google/guava

@Override
 public sun.misc.Unsafe run() throws Exception {
  Class<sun.misc.Unsafe> k = sun.misc.Unsafe.class;
  for (java.lang.reflect.Field f : k.getDeclaredFields()) {
   f.setAccessible(true);
   Object x = f.get(null);
   if (k.isInstance(x)) {
    return k.cast(x);
   }
  }
  throw new NoSuchFieldError("the Unsafe");
 }
});

代码示例来源：origin: apache/incubator-dubbo

public static Map<String, Field> getBeanPropertyFields(Class cl) {
  Map<String, Field> properties = new HashMap<String, Field>();
  for (; cl != null; cl = cl.getSuperclass()) {
    Field[] fields = cl.getDeclaredFields();
    for (Field field : fields) {
      if (Modifier.isTransient(field.getModifiers())
          || Modifier.isStatic(field.getModifiers())) {
        continue;
      }
      field.setAccessible(true);
      properties.put(field.getName(), field);
    }
  }
  return properties;
}

代码示例来源：origin: apache/incubator-dubbo

public static Map<String, Field> getBeanPropertyFields(Class cl) {
  Map<String, Field> properties = new HashMap<String, Field>();
  for (; cl != null; cl = cl.getSuperclass()) {
    Field[] fields = cl.getDeclaredFields();
    for (Field field : fields) {
      if (Modifier.isTransient(field.getModifiers())
          || Modifier.isStatic(field.getModifiers())) {
        continue;
      }
      field.setAccessible(true);
      properties.put(field.getName(), field);
    }
  }
  return properties;
}

代码示例来源：origin: stackoverflow.com

Field[] declaredFields = String.class.getDeclaredFields();
List<Field> staticFields = new ArrayList<Field>();
for (Field field : declaredFields) {
  if (java.lang.reflect.Modifier.isStatic(field.getModifiers())) {
    staticFields.add(field);
  }
}

代码示例来源：origin: libgdx/libgdx

/** Returns an array of {@link Field} objects reflecting all the fields declared by the supplied class. */
static public Field[] getDeclaredFields (Class c) {
  java.lang.reflect.Field[] fields = c.getDeclaredFields();
  Field[] result = new Field[fields.length];
  for (int i = 0, j = fields.length; i < j; i++) {
    result[i] = new Field(fields[i]);
  }
  return result;
}

代码示例来源：origin: libgdx/libgdx

/** Returns an array of {@link Field} objects reflecting all the fields declared by the supplied class. */
static public Field[] getDeclaredFields (Class c) {
  java.lang.reflect.Field[] fields = c.getDeclaredFields();
  Field[] result = new Field[fields.length];
  for (int i = 0, j = fields.length; i < j; i++) {
    result[i] = new Field(fields[i]);
  }
  return result;
}

代码示例来源：origin: apache/incubator-dubbo

/**
   * Creates a map of the classes fields.
   */
  protected HashMap getFieldMap(Class cl) {
    HashMap fieldMap = new HashMap();

    for (; cl != null; cl = cl.getSuperclass()) {
      Field[] fields = cl.getDeclaredFields();
      for (int i = 0; i < fields.length; i++) {
        Field field = fields[i];

        if (Modifier.isTransient(field.getModifiers()) ||
            Modifier.isStatic(field.getModifiers()))
          continue;

        // XXX: could parameterize the handler to only deal with public
        field.setAccessible(true);

        fieldMap.put(field.getName(), field);
      }
    }

    return fieldMap;
  }
}

代码示例来源：origin: redisson/redisson

public static FieldList<FieldDescription.InDefinedShape> getAllFields(Class<?> cls) {
    List<Field> fields = new ArrayList<Field>();
    for (Class<?> c = cls; c != null; c = c.getSuperclass()) {
      Collections.addAll(fields, c.getDeclaredFields());
    }
    return new FieldList.ForLoadedFields(fields);
  }
}

代码示例来源：origin: redisson/redisson

public static Field getDeclaredField(Class<?> clazz, String fieldName) throws NoSuchFieldException {
  for (Class<?> c : getClassHierarchy(clazz)) {
    for (Field field : c.getDeclaredFields()) {
      if (field.getName().equals(fieldName)) {
        return field;
      }
    }
  }
  throw new NoSuchFieldException("No such field: " + fieldName);
}

代码示例来源：origin: org.mockito/mockito-core

/**
 * Instance fields declared in the class of the given instance.
 *
 * @param instance Instance from which declared fields will be retrieved.
 * @return InstanceFields of this object instance.
 */
public static InstanceFields declaredFieldsOf(Object instance) {
  List<InstanceField> instanceFields = new ArrayList<InstanceField>();
  instanceFields.addAll(instanceFieldsIn(instance, instance.getClass().getDeclaredFields()));
  return new InstanceFields(instance, instanceFields);
}

代码示例来源：origin: org.mockito/mockito-core

/**
 * Instance fields declared in the class and superclasses of the given instance.
 *
 * @param instance Instance from which declared fields will be retrieved.
 * @return InstanceFields of this object instance.
 */
public static InstanceFields allDeclaredFieldsOf(Object instance) {
  List<InstanceField> instanceFields = new ArrayList<InstanceField>();
  for (Class<?> clazz = instance.getClass(); clazz != Object.class; clazz = clazz.getSuperclass()) {
    instanceFields.addAll(instanceFieldsIn(instance, clazz.getDeclaredFields()));
  }
  return new InstanceFields(instance, instanceFields);
}

代码示例来源：origin: org.mockito/mockito-core

private List<Field> orderedInstanceFieldsFrom(Class<?> awaitingInjectionClazz) {
    List<Field> declaredFields = Arrays.asList(awaitingInjectionClazz.getDeclaredFields());
    declaredFields = ListUtil.filter(declaredFields, notFinalOrStatic);

    return sortSuperTypesLast(declaredFields);
  }
}

代码示例来源：origin: google/guava

static ImmutableSet<Field> relevantFields(Class<?> cls) {
 ImmutableSet.Builder<Field> builder = ImmutableSet.builder();
 for (Field field : cls.getDeclaredFields()) {
  /*
   * Coverage mode generates synthetic fields.  If we ever add private
   * fields, they will cause similar problems, and we may want to switch
   * this check to isAccessible().
   */
  if (!field.isSynthetic() && field.getType() == String.class) {
   builder.add(field);
  }
 }
 return builder.build();
}

代码示例来源：origin: google/guava

@GwtIncompatible // reflection
private static FluentIterable<Field> getConstantFields() {
 return FluentIterable.from(asList(MediaType.class.getDeclaredFields()))
   .filter(
     new Predicate<Field>() {
      @Override
      public boolean apply(Field input) {
       int modifiers = input.getModifiers();
       return isPublic(modifiers)
         && isStatic(modifiers)
         && isFinal(modifiers)
         && MediaType.class.equals(input.getType());
      }
     });
}

代码示例来源：origin: apache/kafka

private void ensureEmptySelectorFields(Selector selector) throws Exception {
  for (Field field : Selector.class.getDeclaredFields()) {
    ensureEmptySelectorField(selector, field);
  }
}

代码示例来源：origin: spring-projects/spring-framework

@Override
  public boolean isValid(Object value, ConstraintValidatorContext context) {
    List<Field> fieldsErros = new ArrayList<>();
    Arrays.asList(value.getClass().getDeclaredFields()).forEach(f -> {
      f.setAccessible(true);
      try {
        if (!f.getName().equals(ID) && f.get(value) == null) {
          fieldsErros.add(f);
          context.buildConstraintViolationWithTemplate(context.getDefaultConstraintMessageTemplate())
              .addPropertyNode(f.getName())
              .addConstraintViolation();
        }
      } catch (IllegalAccessException ex) {
        throw new IllegalStateException(ex);
      }
    });
    return fieldsErros.isEmpty();
  }
}

代码示例来源：origin: spring-projects/spring-framework

@Override
  public boolean isValid(Object value, ConstraintValidatorContext context) {
    List<Field> fieldsErros = new ArrayList<>();
    Arrays.asList(value.getClass().getDeclaredFields()).forEach(f -> {
      f.setAccessible(true);
      try {
        if (!f.getName().equals(ID) && f.get(value) == null) {
          fieldsErros.add(f);
          context.buildConstraintViolationWithTemplate(context.getDefaultConstraintMessageTemplate())
              .addPropertyNode(f.getName())
              .addConstraintViolation();
        }
      } catch (IllegalAccessException ex) {
        throw new IllegalStateException(ex);
      }
    });
    return fieldsErros.isEmpty();
  }
}