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Copy pathReflections.java
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executable file
·117 lines (102 loc) · 4.71 KB
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package com.ppp.tools;
import sun.reflect.ReflectionFactory;
import java.lang.reflect.*;
/**
* 反序列化工具类
*/
public class Reflections {
public static void setAccessible(AccessibleObject member) {
String versionStr = System.getProperty("java.version");
int javaVersion = Integer.parseInt(versionStr.split("\\.")[0]);
member.setAccessible(true);
}
public static Field getField(final Class<?> clazz, final String fieldName) {
Field field = null;
try {
field = clazz.getDeclaredField(fieldName);
setAccessible(field);
} catch (NoSuchFieldException ex) {
if (clazz.getSuperclass() != null)
field = getField(clazz.getSuperclass(), fieldName);
}
return field;
}
public static void setFieldValue(final Object obj, final String fieldName, final Object value) throws Exception {
final Field field = getField(obj.getClass(), fieldName);
field.set(obj, value);
}
public static Object getFieldValue(final Object obj, final String fieldName) throws Exception {
final Field field = getField(obj.getClass(), fieldName);
return field.get(obj);
}
public static Constructor<?> getFirstCtor(final String name) throws Exception {
final Constructor<?> ctor = Class.forName(name).getDeclaredConstructors()[0];
setAccessible(ctor);
return ctor;
}
public static Constructor<?> getFirstCtor(Class clazz) throws Exception {
final Constructor<?> ctor = clazz.getDeclaredConstructors()[0];
setAccessible(ctor);
return ctor;
}
public static Object newInstance(String className, Object... args) throws Exception {
return getFirstCtor(className).newInstance(args);
}
public static <T> T createWithoutConstructor(Class<T> classToInstantiate)
throws NoSuchMethodException, InstantiationException, IllegalAccessException, InvocationTargetException {
return createWithConstructor(classToInstantiate, Object.class, new Class[0], new Object[0]);
}
@SuppressWarnings({"unchecked"})
public static <T> T createWithConstructor(Class<T> classToInstantiate, Class<? super T> constructorClass, Class<?>[] consArgTypes, Object[] consArgs)
throws NoSuchMethodException, InstantiationException, IllegalAccessException, InvocationTargetException {
Constructor<? super T> objCons = constructorClass.getDeclaredConstructor(consArgTypes);
setAccessible(objCons);
Constructor<?> sc = ReflectionFactory.getReflectionFactory().newConstructorForSerialization(classToInstantiate, objCons);
setAccessible(sc);
return (T) sc.newInstance(consArgs);
}
public static void invokeMethod(Object obj, String methodName, Object... args){
try {
Class<?>[] argsClass = new Class[args.length];
for (int i = 0; i < args.length; i++) {
argsClass[i] = args[i].getClass();
if(argsClass[i].equals(Integer.class))
argsClass[i] =Integer.TYPE;
else if(argsClass[i].equals(Boolean.class))
argsClass[i] =Boolean.TYPE;
else if(argsClass[i].equals(Byte.class))
argsClass[i] =Byte.TYPE;
else if(argsClass[i].equals(Long.class))
argsClass[i] =Long.TYPE;
else if(argsClass[i].equals(Double.class))
argsClass[i] =Double.TYPE;
else if(argsClass[i].equals(Float.class))
argsClass[i] =Float.TYPE;
else if(argsClass[i].equals(Character.class))
argsClass[i] =Character.TYPE;
else if(argsClass[i].equals(Short.class))
argsClass[i] =Short.TYPE;
}
try {
Method method = obj.getClass().getDeclaredMethod(methodName, argsClass);
method.invoke(obj, args);
}catch (NoSuchMethodException e){
Method method = obj.getClass().getSuperclass().getDeclaredMethod(methodName, argsClass);
method.invoke(obj, args);
}
} catch (Exception e) {
e.printStackTrace();
}
}
public static Object invokeMethod(Object obj, String methodName, Class[] argsClass, Object[] args) throws Exception {
Method method;
try {
method = obj.getClass().getDeclaredMethod(methodName, argsClass);
} catch (NoSuchMethodException e) {
method = obj.getClass().getSuperclass().getDeclaredMethod(methodName, argsClass);
}
method.setAccessible(true);
Object object = method.invoke(obj, args);
return object;
}
}