49 lines
1.8 KiB
Java
49 lines
1.8 KiB
Java
package com.jeesite.modules.utils;
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import java.util.Random;
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public class KeyUtil {
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public static String ObjKey(int length, int type) {
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Random random = new Random();
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StringBuffer key = new StringBuffer();
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if (type == 1) {
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String str = "0123456789";
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for (int i = 0; i < length; ++i) {
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//从62个的数字或字母中选择
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int number = random.nextInt(10);
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//将产生的数字通过length次承载到key中
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key.append(str.charAt(number));
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}
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return key.toString();
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} else if (type == 2) {
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String str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
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for (int i = 0; i < length; ++i) {
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//从62个的数字或字母中选择
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int number = random.nextInt(36);
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//将产生的数字通过length次承载到key中
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key.append(str.charAt(number));
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}
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return key.toString();
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} else if (type == 3) {
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String str = "abcdefghijklmnopqrstuvwxyz0123456789";
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for (int i = 0; i < length; ++i) {
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//从62个的数字或字母中选择
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int number = random.nextInt(36);
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//将产生的数字通过length次承载到key中
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key.append(str.charAt(number));
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}
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return key.toString();
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} else {
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String str = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
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for (int i = 0; i < length; ++i) {
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//从62个的数字或字母中选择
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int number = random.nextInt(62);
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//将产生的数字通过length次承载到key中
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key.append(str.charAt(number));
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}
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return key.toString();
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}
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}
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}
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