例如：box.innerHTML = '欢迎来到javascript',
内容是由自己规定的。又例如：你要随机输出一个数组元素：
var arrays = [12, 13, 15, 17, 0, 9]
var n = Math.floor(Math.random() * arrays .length + 1)-1
数组的内容是你自己定义的，输出的都是arrays数组定义的元素，这样就叫做写死，
如果不是写死的，就是例如这样的：
var arrays = [] //数组一开始是空的，这里的内容是通过后端的接口返回的数据push进来的。
var n = Math.floor(Math.random() * arrays .length + 1)-1
这样的话你输出的内容就是动态的，只有后端的数据发生了改变，你输出的内容也会跟着改变。
package com.efounder.pub.utilimport java.util.ArrayList
import java.util.Vector
/**
* 字符串处理工具类
* @author xiewanzhi
*/
public class StringFunction {
public static String convertFromStringArrayToStringBySymbol(String[] stringArray, char symbol) {
StringBuffer sb = new StringBuffer()
for (int i = 0 i < stringArray.length i++) {
sb.append(stringArray[i])
sb.append(symbol)
}
return sb.toString()
}
public static String[] convertFromStringToStringArrayBySymbol(String string, String symbol) {
Vector stringVector = convertFromStringToStringVectorBySymbol(string, symbol)
String[] stringArray = new String[stringVector.size()]
for (int i = 0 i < stringVector.size() i++)
stringArray[i] = (String) (stringVector.elementAt(i))
return stringArray
}
public static String[] convertFromStringToStringArrayBySymbolNO(String string, String symbol) {
Vector stringVector = convertFromStringToStringVectorBySymbolNO(string, symbol)
String[] stringArray = new String[stringVector.size()]
for (int i = 0 i < stringVector.size() i++)
stringArray[i] = (String) (stringVector.elementAt(i))
return stringArray
}
public static Vector convertFromStringToStringVectorBySymbol(String string, String symbol) {
Vector stringVector = new Vector()
String[] array = string.split(symbol)
for (int i = 0 i < array.length i++) {
stringVector.addElement(array[i])
}
return stringVector
}
public static Vector convertFromStringToStringVectorBySymbolNO(String string, String symbol) {
Vector stringVector = new Vector()
String[] array = string.split(symbol)
for (int i = 0 i < array.length i++) {
stringVector.addElement(array[i])
}
return stringVector
}
public static String convertFromStringVectorToStringBySymbol(Vector stringVector, char symbol) {
StringBuffer sb = new StringBuffer()
for (int i = 0 i < stringVector.size() i++) {
sb.append(stringVector.elementAt(i))
sb.append(symbol)
}
return sb.toString()
}
public static String fillString(String psStr, char psC, int psLen) {
if (psStr.length() > psLen) {
return psStr.substring(0, psLen)
} else {
char[] vcTemp = new char[psLen]
for (int i = 0 i < psLen i++) {
vcTemp[i] = psC
}
String vsTemp = new String(vcTemp)
String vsResult = psStr.concat(vsTemp)
return vsResult.substring(0, psLen)
}
}
public static String formatValue(double value, int sep, char ch, int round) {
return ""
}
public static String GB2Uni(String original) {
if (original != null) {
try {
return new String(original.getBytes("GBK"), "ISO8859_1")
} catch (Exception e) {
e.printStackTrace()
return null
}
} else
return null
}
public static String Uni2GB(String original) {
if (original != null) {
try {
return new String(original.getBytes("ISO8859_1"), "GBK")
} catch (Exception e) {
e.printStackTrace()
return null
}
} else
return null
}
public static String generateID(String pre, int value, int num) {
char chs[] = new char[num]
for (int i = 0 i < num i++) {
chs[num - i - 1] = (char) (48 + value % 10)
value = value / 10
}
return pre.trim() + new String(chs)
}
public static String getTempStr() {
return String.valueOf(System.currentTimeMillis())
}
public static boolean isIncludeString(String psStr, String psS) {
int viPos = psStr.indexOf(psS)
return viPos >= 0
}
public static String replaceString(String psStr, String psS, String psD) {
int viPos = psStr.indexOf(psS)
if (viPos < 0)
return psStr
int viLength = psS.length()
StringBuffer vsValue = new StringBuffer()
while (viPos >= 0) {
vsValue.append(psStr.substring(0, viPos))
vsValue.append(psD)
psStr = psStr.substring(viPos + viLength)
viPos = psStr.indexOf(psS)
}
vsValue.append(psStr)
return vsValue.toString()
}
public static String[] splitStringByToken(String vsStr, String symbol) {
String vsString[] = { "", "" }
int viPos1
viPos1 = vsStr.indexOf(symbol)
if (viPos1 < 0) {
vsString[0] = vsStr
vsString[1] = ""
return vsString
}
vsString[0] = vsStr.substring(0, viPos1)
vsString[1] = vsStr.substring(viPos1 + symbol.length(), vsStr.length())
return vsString
}
public static Vector convertFromStringToStringVectorByString(String string, String symbol) {
Vector stringVector = new Vector()
String vsStr = string.trim()
String vsTemp = null
String[] st = null
while ((!vsStr.equals("")) && isIncludeString(vsStr, symbol)) {
st = splitStringByToken(vsStr, symbol)
vsTemp = st[0].trim()
if (!vsTemp.equals(""))
stringVector.addElement(vsTemp)
vsStr = st[1].trim()
}
if (!vsStr.equals(""))
stringVector.addElement(vsStr)
return stringVector
}
public static String getTempStr(int length) {
String str = String.valueOf(System.currentTimeMillis())
return str.substring(str.length() - length)
}
public static Vector convertFromStringToStringVectorByStringWithNull(String string, String symbol) {
Vector stringVector = new Vector()
String vsStr = string.trim()
String vsTemp = null
String[] st = null
while ((!vsStr.equals("")) && isIncludeString(vsStr, symbol)) {
st = splitStringByToken(vsStr, symbol)
vsTemp = st[0].trim()
stringVector.addElement(vsTemp)
vsStr = st[1].trim()
}
if (!vsStr.equals(""))
stringVector.addElement(vsStr)
return stringVector
}
public static String DelZeroForBM(String Bm, int Js, String Struct) {
int i, Len, Length
Len = Bm.length()
Length = GetStructLength(Struct, Js)
if (Len >= Length) {
Bm = Bm.substring(0, Length)
}
return Bm
}
public static String FillZeroForBM(String Bm, String Struct) {
int i, Len, Length
Len = Bm.length()
Length = GetStructLength(Struct, 0)
for (i = 0 i < Length - Len i++) {
Bm += "0"
}
return Bm
}
public static int getJsByCodingStruct(String code, String struct) {
int codeLength = code.length()
int structLength = struct.length()
int tempLength = 0
for (int js = 1 js <= structLength js++) {
tempLength = GetStructLength(struct, js)
if (codeLength == tempLength)
return js
}
return 0
}
public static int GetStructLength(String Struct, int JS) {
int i, Length = 0
String sub
Integer ii
if (JS == 0)
JS = Struct.trim().length()
for (i = 0 i < JS i++) {
sub = Struct.substring(i, i + 1).trim()
ii = Integer.decode("0x" + sub)
// Length += Integer. .parseInt(sub)
Length += ii.intValue()
}
return Length
}
public static String GetSubBMfromBM(String BM, String Struct, int SJS) {
String Res = ""
int Len
Len = GetStructLength(Struct, SJS)
if (BM.length() >= Len)
Res = BM.substring(0, Len)
return Res
}
public static String FillZeroFromBegin(int num, int leng) {
return FillTagFromBegin(String.valueOf(num), leng, "0")
}
public static String FillTagFromBegin(String num, int leng, String Tag) {
String Res = "", tempStr1 = "", tempStr2 = ""
tempStr1 = String.valueOf(num)
for (int i = 0 i < (leng - tempStr1.length()) i++) {
tempStr2 += Tag
}
Res = tempStr2 + tempStr1
return Res
}
public static String ClearBMZero(String BM, String BMStruct) {
return ClearBMTag(BM, BMStruct, "0")
}
public static String ClearBMTag(String BM, String BMStruct, String Tag) {
int JSLen = BMStruct.length()
String bm = "", ZERO, Tmp
int Len
for (int i = 1 i <= JSLen i++) {
Tmp = BMStruct.substring(i - 1, i)
Len = Integer.parseInt(Tmp)
ZERO = RepeatChar(Tag, Len)
if (!BM.startsWith(ZERO)) {
bm += BM.substring(0, Len)
BM = BM.substring(Len)
} else
break
}
return bm
}
public static String RepeatChar(String c, int len) {
String Res = ""
for (int i = 0 i < len i++) {
Res += c
}
return Res
}
/**
* key1=value1key2=value2key3=value3
*
* @param inputString String
* @param hashMap Map
*/
public static void String2HashMap(String inputString, java.util.Map hashMap) {
String[] keyValues = StringFunction.convertFromStringToStringArrayBySymbolNO(inputString, "")
String[] keyValue
String key, value
for (int i = 0 i < keyValues.length i++) {
if (!"".equals(keyValues[i])) {
keyValue = StringFunction.convertFromStringToStringArrayBySymbolNO(keyValues[i], "=")
if (keyValue.length < 2)
continue
key = keyValue[0]
value = ""
for (int k = 1 k < keyValue.length k++) {
value += keyValue[k]
}
hashMap.put(key, value)
}
}
}
/**
*
* @param hashMap
* Map
* @return String
*/
public static String HashMap2String(java.util.Map hashMap) {
Object[] keys = hashMap.keySet().toArray()
String key, value, keyValue = ""
for (int i = 0 i < keys.length i++) {
key = (String) keys[i]
value = (String) hashMap.get(key)
keyValue += key + "=" + value + ""
}
if (keyValue.length() > 0) {
keyValue = keyValue.substring(0, keyValue.length() - 1)
}
return keyValue
}
/**
*
* @param value
* String
* @param mark
* String
* @return String[]
*/
public static String[] split(String value, String mark) {
int index = value.indexOf(mark)
java.util.List list = new ArrayList()
while (index >= 0) {
list.add(value.substring(0, index))
value = value.substring(index + mark.length())
index = value.indexOf(mark)
}
list.add(value)
String[] rtn = new String[list.size()]
System.arraycopy(list.toArray(), 0, rtn, 0, rtn.length)
return rtn
}
public static void main(String[] args) {
String value = "a "
String[] rtn = split(value, "")
System.out.println(rtn)
}
}
