3DES加解密需要密钥支持,要求为8的倍数,一般会使用32位的字母数字随机字符串作为密钥. 下面这个工具类,可用做key值的生成,详见下方代码: package test; import java.util.Random; public class ThreeDes_key { public static final String ALLCHAR = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; pu
hdu4871 Shortest-path tree Time Limit: 6000/3000 MS (Java/Others) Memory Limit: 130712/130712 K (Java/Others) Total Submission(s): 382 Accepted Submission(s): 115 Problem Description Given a connected, undirected graph G, a shortest-path tree r