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java隨機(jī)生成字符串(字符隨機(jī)生成類生成隨機(jī)字符組合)

更新時(shí)間：2013年12月30日 10:22:40 作者：

java隨機(jī)生成字符串,字符組合多樣，可以大小字組合、大+小字符+數(shù)字等方式,大家參考使用吧

package com.phyl.password;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Random;
/**
* 字符隨機(jī)生成類
* @author ASUS
*
*/
public class PassWord {

/**
* 密碼類型枚舉
* @author ASUS
*/
public static enum TYPE {
 /**
 * 字符型
 */
 LETTER,
 /**
 * 大寫字符型
 */
 CAPITAL,
 /**
 * 數(shù)字型
 */
 NUMBER,
 /**
 * 符號(hào)型
 */
 SIGN,
 /**
 * 大+小字符型
 */
 LETTER_CAPITAL,
 /**
 * 小字符+數(shù)字型
 */
 LETTER_NUMBER,
 /**
 * 大+小字符+數(shù)字型
 */
 LETTER_CAPITAL_NUMBER,
 /**
 * 大+小字符+數(shù)字+符號(hào) 型
 */
 LETTER_CAPITAL_NUMBER_SIGN
}

private static String[] lowercase = {
 "a","b","c","d","e","f","g","h","i","j","k",
 "l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};

private static String[] capital = {
 "A","B","C","D","E","F","G","H","I","J","K",
 "L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"};

private static String[] number = {
 "1","2","3","4","5","6","7","8","9","0"};

private static String[] sign = {
 "~","!","@","#","$","%","^","&","*","(",")","_","+","`","-","=",
 "{","}","|",":","\"","<",">","?",
 "[","]","\\",";","'",",",".","/"};

/**
* 靜態(tài)隨機(jī)數(shù)
*/
private static Random random = new Random();

public static void main(String[] args) {
 System.out.println(PassWord.getRandom(24, PassWord.TYPE.CAPITAL));
}

/**
* 獲取隨機(jī)組合碼
* @param num 位數(shù)
* @param type 類型
* @type
* 字符型 LETTER,
* 大寫字符型 CAPITAL,
* 數(shù)字型 NUMBER,
* 符號(hào)型 SIGN,
* 大+小字符型 LETTER_CAPITAL,
* 小字符+數(shù)字型 LETTER_NUMBER,
* 大+小字符+數(shù)字型 LETTER_CAPITAL_NUMBER,
* 大+小字符+數(shù)字+符號(hào) 型 LETTER_CAPITAL_NUMBER_SIGN
*/
public static String getRandom(int num,TYPE type){
 ArrayList<String> temp = new ArrayList<String>();
 StringBuffer code = new StringBuffer();
 if(type == TYPE.LETTER){
 temp.addAll(Arrays.asList(lowercase));
 }else if(type == TYPE.CAPITAL){
 temp.addAll(Arrays.asList(capital));
 }else if(type == TYPE.NUMBER){
 temp.addAll(Arrays.asList(number));
 }else if(type == TYPE.SIGN){
 temp.addAll(Arrays.asList(sign));
 }else if(type == TYPE.LETTER_CAPITAL){
 temp.addAll(Arrays.asList(lowercase));
 temp.addAll(Arrays.asList(capital));
 }else if(type == TYPE.LETTER_NUMBER){
 temp.addAll(Arrays.asList(lowercase));
 temp.addAll(Arrays.asList(number));
 }else if(type == TYPE.LETTER_CAPITAL_NUMBER){
 temp.addAll(Arrays.asList(lowercase));
 temp.addAll(Arrays.asList(capital));
 temp.addAll(Arrays.asList(number));
 }else if(type == TYPE.LETTER_CAPITAL_NUMBER_SIGN){
 temp.addAll(Arrays.asList(lowercase));
 temp.addAll(Arrays.asList(capital));
 temp.addAll(Arrays.asList(number));
 temp.addAll(Arrays.asList(sign));
 }
 for (int i = 0; i < num; i++) {
 code.append(temp.get(random.nextInt(temp.size())));
 }
 return code.toString();
}