IOS算法：
char
data[NUMBER_OF_CHARS];
for
(
int
x=0;x<NUMBER_OF_CHARS;data[x++] = (
char
)(
'A'
+ (arc4random_uniform(26))));
return
[[NSString alloc] initWithBytes:data length:NUMBER_OF_CHARS encoding:NSUTF8StringEncoding];
JAVA实现：
给定一个字符集合，给定随机生成的字符串的长度，即可随机生成字符串；
比如{'a','.....,'z'}及长度5，则随机生成一个长度为5的字符串；
- package xiazdong.util;
- import java.util.Random;
- /*根据给定的char集合，生成随机的字符串*/
- public class StringWidthWeightRandom {
- private Random widthRandom = new Random();
- private int length;
- private char[] chars;
- private Random random = new Random();
- public StringWidthWeightRandom(char[] chars) {
- this.chars = chars;
- }
- //参数为生成的字符串的长度，根据给定的char集合生成字符串
- public String getNextString(int length){
- char[] data = new char[length];
- for(int i = 0;i < length;i++){
- int index = random.nextInt(chars.length);
- data[i] = chars[index];
- }
- String s = new String(data);
- return s;
- }
- }
测试代码：
- package test.com.sap.prd.util;
- import junit.framework.TestCase;
- import org.junit.Test;
- import com.sap.prd.util.StringWidthWeightRandom;
- public class StringWidthWeightRandomTest extends TestCase {
- @Test
- public void testGetNextString()throws Exception{
- StringWidthWeightRandom random = new StringWidthWeightRandom(new char[]{'A','B','C','D','E','F','G'});
- for(int i=1;i<10;i++){
- System.out.println(random.getNextString(i));
- }
- }
- }
结果：
- F
- CC
- EGE
- CADA
- CFBFC
- DBBCFE
- BFEADFA
- FDEEDACE
- EEFFGFBEG
