public class Test_31 {// 动态规划解决0-1背包问题public int knapsack(int capacity, int[] weights, int[] values, int n) {// 创建一个二维数组dp,用于记录状态转移过程int[][] dp new int[n 1][capacity 1];// 遍历物品for (int i 1; i < n; i) {// 遍…
1.背景,直接升级操作系统从centos-》国产化操作系统,mysql也升级到5.7.44 2,报错
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconn…