Java如何生成随机字符串？
package org.nhooo.example.security;
import java.security.SecureRandom;
import java.util.Random;
public class RandomString {
public static final String SOURCES =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890";
public static void main(String[] args) {
RandomString rs = new RandomString();
System.out.println(rs.generateString(new Random(), SOURCES, 10));
System.out.println(rs.generateString(new Random(), SOURCES, 10));
System.out.println(rs.generateString(new SecureRandom(), SOURCES, 15));
System.out.println(rs.generateString(new SecureRandom(), SOURCES, 15));
}
/**
* Generate a random string.
*
* @param random the random number generator.
* @param characters the characters for generating string.
* @param length the length of the generated string.
* @return
*/
public String generateString(Random random, String characters, int length) {
char[] text = new char[length];
for (int i = 0; i < length; i++) {
text[i] = characters.charAt(random.nextInt(characters.length()));
}
return new String(text);
}
}代码段产生的示例字符串为：
uxEUFqTqS0 vr89vdF4gh ysYF9XEHhO5FtDf aBANhrLObZ1XLJi
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