Spring 反射工具类ReflectionUtils

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    public static final int PUBLIC           = 0x00000001;       public static final int PRIVATE          = 0x00000002;     public static final int PROTECTED        = 0x00000004;       public static final int STATIC           = 0x00000008;       public static final int FINAL            = 0x00000010;        public static final int SYNCHRONIZED     = 0x00000020;         public static final int VOLATILE         = 0x00000040;          public static final int TRANSIENT        = 0x00000080;         public static final int NATIVE           = 0x00000100;          public static final int INTERFACE        = 0x00000200;         public static final int ABSTRACT         = 0x00000400;         public static final int STRICT           = 0x00000800;

上面的是Modifier里面定义的静态属性

并且每一个都定义了一个判读方法如

 public static boolean isPublic(int mod) {return (mod & PUBLIC) != 0;    }

 public static boolean isPrivate(int mod) {return (mod & PRIVATE) != 0;    }

  public static boolean isStatic(int mod) {return (mod & STATIC) != 0;    }

ReflectionUtils这个反射工具类有几个工具方法，首先介绍几个控制访问权限的方法makeAccessible

它由3个重载，分别是对属性，方法和构造

属性

public static void makeAccessible(Field field) {if ((!Modifier.isPublic(field.getModifiers()) || !Modifier.isPublic(field.getDeclaringClass().getModifiers()) ||Modifier.isFinal(field.getModifiers())) && !field.isAccessible()) {field.setAccessible(true);}}

方法

public static void makeAccessible(Method method) {if ((!Modifier.isPublic(method.getModifiers()) || !Modifier.isPublic(method.getDeclaringClass().getModifiers()))&& !method.isAccessible()) {method.setAccessible(true);}}

构造

public static void makeAccessible(Constructor<?> ctor) {if ((!Modifier.isPublic(ctor.getModifiers()) || !Modifier.isPublic(ctor.getDeclaringClass().getModifiers()))&& !ctor.isAccessible()) {ctor.setAccessible(true);}}

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