23 lines
718 B
Java
Executable File
23 lines
718 B
Java
Executable File
package com.windchat.im.business.utils;
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import java.security.NoSuchAlgorithmException;
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import java.security.SecureRandom;
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public class StringRandomUtils {
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private static final String STR_62_RANDOM = "abcdefghijklmnopqrstuvwxyz1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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// 随机生成N位字符串（A-Z，a-z，0-9）
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public static String generateRandomString(int length) throws NoSuchAlgorithmException {
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SecureRandom sRandom = SecureRandom.getInstance("SHA1PRNG");
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StringBuffer newRandomStr = new StringBuffer();
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for (int i = 0; i < length; ++i) {
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int number = sRandom.nextInt(STR_62_RANDOM.length());
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newRandomStr.append(STR_62_RANDOM.charAt(number));
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}
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return newRandomStr.toString();
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}
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}
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