获取从给定的类和参数类型指定的构造方法

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 * Licensed under the Apache License, Version 2.0 (the "License");

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 /**来自 
  N o w  J a v a  . c o m**/

//package com.nowjava;


import java.lang.reflect.Constructor;


import java.security.AccessController;


import java.security.PrivilegedActionException;

import java.security.PrivilegedExceptionAction;


public class Main {

    /**

     * Obtains the Constructor specified from the given Class and argument types

     * @param clazz

     * @param argumentTypes

     * @return

     * @throws NoSuchMethodException

     */
     /*
     NowJava.com 提 供
     */

    public static Constructor<?> getConstructor(final Class<?> clazz,

            final Class<?>... argumentTypes) throws NoSuchMethodException {

        try {

            return AccessController

                    .doPrivileged(new PrivilegedExceptionAction<Constructor<?>>() {

                        public Constructor<?> run()

                                throws NoSuchMethodException {

                            return clazz.getConstructor(argumentTypes);

                        }

                    });

        }

        // Unwrap

        catch (final PrivilegedActionException pae) {

            final Throwable t = pae.getCause();

            // Rethrow

            if (t instanceof NoSuchMethodException) {

                throw (NoSuchMethodException) t;

            } else {

                // No other checked Exception thrown by Class.getConstructor

                try {