程序包 org.springframework.test.util

类 ReflectionTestUtils

  • public abstract class ReflectionTestUtils
extends Object
    ReflectionTestUtils is a collection of reflection-based utility methods for use in unit and integration testing scenarios.

    There are often times when it would be beneficial to be able to set a non-public field, invoke a non-public setter method, or invoke a non-publicconfiguration or lifecycle callback method when testing code involving, for example:

    • ORM frameworks such as JPA and Hibernate which condone the usage of private or protected field access as opposed to public setter methods for properties in a domain entity.
    • Spring's support for annotations such as @Autowired, @Inject, and @Resource which provides dependency injection for private or protected fields, setter methods, and configuration methods.
    • Use of annotations such as @PostConstruct and @PreDestroy for lifecycle callback methods.

    In addition, several methods in this class provide support for static fields — for example, setField(Class, String, Object), getField(Class, String), etc.

    从以下版本开始:
    2.5
    作者:
    Sam Brannen, Juergen Hoeller
    另请参阅:
    ReflectionUtils, AopTestUtils

    • 方法详细资料

      • setField

        public static void setField​(Object targetObject,
                            String name,
                            Object value)
        Set the field with the given name on the provided targetObject to the supplied value.

        This method delegates to setField(Object, String, Object, Class), supplying null for the type argument.

        参数:
        targetObject - the target object on which to set the field; never null
        name - the name of the field to set; never null
        value - the value to set

      • setField

        public static void setField​(Object targetObject,
                            String name,
                            Object value,
                            Class<?> type)
        Set the field with the given name/type on the provided targetObject to the supplied value.

        This method delegates to setField(Object, Class, String, Object, Class), supplying null for the targetClass argument.

        参数:
        targetObject - the target object on which to set the field; never null
        name - the name of the field to set; may be null if type is specified
        value - the value to set
        type - the type of the field to set; may be null if name is specified

      • setField

        public static void setField​(Class<?> targetClass,
                            String name,
                            Object value)
        Set the static field with the given name on the provided targetClass to the supplied value.

        This method delegates to setField(Object, Class, String, Object, Class), supplying null for the targetObject and type arguments.

        参数:
        targetClass - the target class on which to set the static field; never null
        name - the name of the field to set; never null
        value - the value to set
        从以下版本开始:
        4.2

      • setField

        public static void setField​(Class<?> targetClass,
                            String name,
                            Object value,
                            Class<?> type)
        Set the static field with the given name/type on the provided targetClass to the supplied value.

        This method delegates to setField(Object, Class, String, Object, Class), supplying null for the targetObject argument.

        参数:
        targetClass - the target class on which to set the static field; never null
        name - the name of the field to set; may be null if type is specified
        value - the value to set
        type - the type of the field to set; may be null if name is specified
        从以下版本开始:
        4.2

      • setField

        public static void setField​(Object targetObject,
                            Class<?> targetClass,
                            String name,
                            Object value,
                            Class<?> type)
        Set the field with the given name/type on the provided targetObject/targetClass to the supplied value.

        If the supplied targetObject is a proxy, it will be unwrapped allowing the field to be set on the ultimate target of the proxy.

        This method traverses the class hierarchy in search of the desired field. In addition, an attempt will be made to make non-public fields accessible, thus allowing one to set protected, private, and package-private fields.

        参数:
        targetObject - the target object on which to set the field; may be null if the field is static
        targetClass - the target class on which to set the field; may be null if the field is an instance field
        name - the name of the field to set; may be null if type is specified
        value - the value to set
        type - the type of the field to set; may be null if name is specified
        从以下版本开始:
        4.2
        另请参阅:
        ReflectionUtils.findField(Class, String, Class), ReflectionUtils.makeAccessible(Field), ReflectionUtils.setField(Field, Object, Object), AopTestUtils.getUltimateTargetObject(Object)

      • getField

        public static Object getField​(Object targetObject,
                              String name)
        Get the value of the field with the given name from the provided targetObject.

        This method delegates to getField(Object, Class, String), supplying null for the targetClass argument.

        参数:
        targetObject - the target object from which to get the field; never null
        name - the name of the field to get; never null
        返回:
        the field's current value
        另请参阅:
        getField(Class, String)

      • getField

        public static Object getField​(Class<?> targetClass,
                              String name)
        Get the value of the static field with the given name from the provided targetClass.

        This method delegates to getField(Object, Class, String), supplying null for the targetObject argument.

        参数:
        targetClass - the target class from which to get the static field; never null
        name - the name of the field to get; never null
        返回:
        the field's current value
        从以下版本开始:
        4.2
        另请参阅:
        getField(Object, String)

      • invokeSetterMethod

        public static void invokeSetterMethod​(Object target,
                                      String name,
                                      Object value)
        Invoke the setter method with the given name on the supplied target object with the supplied value.

        This method traverses the class hierarchy in search of the desired method. In addition, an attempt will be made to make non-public methods accessible, thus allowing one to invoke protected, private, and package-private setter methods.

        In addition, this method supports JavaBean-style property names. For example, if you wish to set the name property on the target object, you may pass either "name" or "setName" as the method name.

        参数:
        target - the target object on which to invoke the specified setter method
        name - the name of the setter method to invoke or the corresponding property name
        value - the value to provide to the setter method
        另请参阅:
        ReflectionUtils.findMethod(Class, String, Class[]), ReflectionUtils.makeAccessible(Method), ReflectionUtils.invokeMethod(Method, Object, Object[])

      • invokeSetterMethod

        public static void invokeSetterMethod​(Object target,
                                      String name,
                                      Object value,
                                      Class<?> type)
        Invoke the setter method with the given name on the supplied target object with the supplied value.

        This method traverses the class hierarchy in search of the desired method. In addition, an attempt will be made to make non-public methods accessible, thus allowing one to invoke protected, private, and package-private setter methods.

        In addition, this method supports JavaBean-style property names. For example, if you wish to set the name property on the target object, you may pass either "name" or "setName" as the method name.

        参数:
        target - the target object on which to invoke the specified setter method
        name - the name of the setter method to invoke or the corresponding property name
        value - the value to provide to the setter method
        type - the formal parameter type declared by the setter method
        另请参阅:
        ReflectionUtils.findMethod(Class, String, Class[]), ReflectionUtils.makeAccessible(Method), ReflectionUtils.invokeMethod(Method, Object, Object[])

      • invokeGetterMethod

        public static Object invokeGetterMethod​(Object target,
                                        String name)
        Invoke the getter method with the given name on the supplied target object with the supplied value.

        This method traverses the class hierarchy in search of the desired method. In addition, an attempt will be made to make non-public methods accessible, thus allowing one to invoke protected, private, and package-private getter methods.

        In addition, this method supports JavaBean-style property names. For example, if you wish to get the name property on the target object, you may pass either "name" or "getName" as the method name.

        参数:
        target - the target object on which to invoke the specified getter method
        name - the name of the getter method to invoke or the corresponding property name
        返回:
        the value returned from the invocation
        另请参阅:
        ReflectionUtils.findMethod(Class, String, Class[]), ReflectionUtils.makeAccessible(Method), ReflectionUtils.invokeMethod(Method, Object, Object[])