package com.shopping.test;import java.util.*;import java.awt.List;import java.lang.reflect.Array;import java.lang.reflect.Method;import java.util.ArrayList;import java.util.HashMap;import java.util.Hashtable;import java.util.LinkedHashMap;import java.util.LinkedHashSet;import java.util.LinkedList;import java.util.Map;import java.util.Set;import java.util.TreeSet;import java.util.Vector;import java.util.WeakHashMap;import java.util.regex.Pattern;import java.util.Iterator;public class Test {    public static void main(String args[]) throws Exception {        char ch[][] = new char[10][10];        System.out.println("char ch[]= " + isNull(ch));        byte be[] = new byte[10];        System.out.println("byte be[]= " + isNull(be));        float[] ft = new float[10];        System.out.println("float ft[]= " + isNull(ft));        double ad[] = new double[10];        System.out.println("double ad[]= " + isNull(ad));        int ai[][][] = new int[10][10][10];        System.out.println("int ai[]= " + isNull(ai));        Object ob = null;        System.out.println("Object= " + isNull(ob));        String a[] = null;        System.out.println("String a []= " + isNull(a));        List aa = new List();        System.out.println("List= " + isNull(aa));        ArrayList aaa = new ArrayList();        System.out.println("ArrayList= " + isNull(aaa));        Map map = new HashMap();        System.out.println("HashMap= " + isNull(map));        String a2[][][][] = new String[10][10][10][20];        System.out.println("String a2 [][][][]= " + isNull(a2));        HashMap map2 = new HashMap();        System.out.println("HashMap= " + isNull(map2));        Vector keys = new Vector();        System.out.println("Vector= " + isNull(keys));        Hashtable ht = new Hashtable();        System.out.println("Hashtable= " + isNull(ht));        LinkedList lt = new LinkedList();        System.out.println("LinkedList= " + isNull(lt));        TreeSet tt = new TreeSet();        System.out.println("TreeSet= " + isNull(tt));        Set ss = new TreeSet();        System.out.println("TreeSet= " + isNull(ss));        Iterator it = new ArrayList().iterator();        System.out.println("Iterator= " + isNull(it));        LinkedHashMap llp = new LinkedHashMap();        System.out.println("LinkedHashMap= " + isNull(llp));        LinkedHashSet llt = new LinkedHashSet();        System.out.println("LinkedHashSet= " + isNull(llt));        WeakHashMap wp = new WeakHashMap();        System.out.println("WeakHashMap= " + isNull(wp));        String sra = "'',a,b,c";        System.out.println(sra.split(",")[0]);        System.out.println("sra= " + isNull(sra.split(",")[0]));    }    /**     *       *   空值检查
      *   @param pInput 要检查的字符串
      *   @return boolean 返回检查结果,但传入的字符串为空的场合,返回真
      *       */    public static boolean isNull(Object pInput) {        // 判断参数是否为空或者''        if (pInput == null || "".equals(pInput)) {            return true;        } else if ("java.lang.String".equals(pInput.getClass().getName())) {            // 判断传入的参数的String类型  替换各种空格            String tmpInput = Pattern.compile("//r|//n|//u3000").matcher((String) pInput).replaceAll("");            // 匹配空            return Pattern.compile("^(//s)*$").matcher(tmpInput).matches();        } else {            // 方法类            Method method = null;            String newInput = "";            try {                // 访问传入参数的size方法                method = pInput.getClass().getMethod("size");                // 判断size大小                // 转换为String类型                newInput = String.valueOf(method.invoke(pInput));                // size为0的场合                if (Integer.parseInt(newInput) == 0) {                    return true;                } else {                    return false;                }            } catch (Exception e) {                // 访问失败                try {                    // 访问传入参数的getItemCount方法                    method = pInput.getClass().getMethod("getItemCount");                    // 判断size大小                    // 转换为String类型                    newInput = String.valueOf(method.invoke(pInput));                    // getItemCount为0的场合                    if (Integer.parseInt(newInput) == 0) {                        return true;                    } else {                        return false;                    }                } catch (Exception ex) {                    // 访问失败                    try {                        // 判断传入参数的长度                        // 长度为0的场合                        if (Array.getLength(pInput) == 0) {                            return true;                        } else {                            return false;                        }                    } catch (Exception exx) {                        // 访问失败                        try {                            // 访问传入参数的hasNext方法                            method = Iterator.class.getMethod("hasNext");                            // 转换String类型                            newInput = String.valueOf(method.invoke(pInput));                            // 转换hasNext的值                            if (!Boolean.valueOf(newInput)) {                                return true;                            } else {                                return false;                            }                        } catch (Exception exxx) {                            // 以上场合不满足                            return false;                        }                    }                }            }        }    }}