集成Redisson和添加过滤器及红包功能
- 集成Redisson客户端并配置相关属性- 添加自定义过滤器配置和实现 - 实现红包领取功能和分布式锁测试 - 更新pom.xml，添加Redisson依赖
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ForJdk17/src/main/java/cn/whaifree/interview/mhy/Main.java
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114
ForJdk17/src/main/java/cn/whaifree/interview/mhy/Main.java
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@ -0,0 +1,114 @@
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package cn.whaifree.interview.mhy;
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import java.util.*;
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/**
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* @version 1.0
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* @Author whai文海
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* @Date 2024/10/12 15:02
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* @注释
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*/
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public class Main
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{
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public static void main(String args[])
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{
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Scanner cin = new Scanner(System.in);
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int i = cin.nextInt();
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int[] nums = new int[i];
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for (int i1 = 0; i1 < nums.length; i1++) {
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nums[i1] = cin.nextInt();
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}
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method(nums);
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}
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public static void method(int[] nums) {
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int[] tmp = Arrays.copyOf(nums, nums.length);
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int sum = 0;
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for (int i = 0; i < nums.length - 1; i++) {
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int a = i;
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int b = i + 1;
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if (nums[a] < 0 && nums[b] > 0) {
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nums[a] = -nums[a];
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nums[b] = -nums[b];
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}
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if (nums[a] < 0 && nums[b] < 0) {
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nums[a] = -nums[a];
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nums[b] = -nums[b];
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}
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sum += nums[a];
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}
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sum += nums[nums.length - 1];
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nums = tmp;
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int sumB = 0;
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for (int i = tmp.length - 1; i > 0; i--) {
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int a = i;
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int b = i - 1;
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if (nums[a] < 0 && nums[b] > 0) {
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nums[a] = -nums[a];
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nums[b] = -nums[b];
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}
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if (nums[a] < 0 && nums[b] < 0) {
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nums[a] = -nums[a];
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nums[b] = -nums[b];
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}
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sumB += nums[a];
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}
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sumB += nums[0];
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System.out.println(Math.max(sumB, sum));
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}
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}
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class p3{
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public static void main(String[] args) {
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LinkedList<Integer> lis = new LinkedList<>();
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for (int i = 0; i < 9; i++) {
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lis.add(i, i * i);
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}
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System.out.println(lis.indexOf(4));
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}
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}
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class P2{
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public static void main(String args[])
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{
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Scanner cin = new Scanner(System.in);
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int i = cin.nextInt();
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LinkedList<Integer> lis = new LinkedList<>();
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for (int i1 = 0; i1 < i; i1++) {
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lis.add(1 + i1);
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}
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int x = cin.nextInt();
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for (int j = 0; j < x; j++) {
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int a = cin.nextInt();
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int b = cin.nextInt();
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int c = cin.nextInt();
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method(lis, a, b, c);
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}
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for (Integer li : lis) {
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System.out.println(li+" ");
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}
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}
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public static void method(LinkedList<Integer> list, int a, int b, int c) {
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Integer A = list.get(list.indexOf(a));
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list.remove(a - 1);
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int i = list.indexOf(b);
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int indexOfB = i;
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if (c == 0) {
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list.add(indexOfB, A);
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}else {
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list.add(indexOfB + 1, A);
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}
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}
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}
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@ -0,0 +1,103 @@
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package cn.whaifree.redo.redo_all_240924;
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import org.junit.Test;
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import java.util.Arrays;
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/**
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* @version 1.0
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* @Author whai文海
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* @Date 2024/10/12 12:01
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* @注释
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*/
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public class LeetCode289 {
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@Test
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public void test() {
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int[][] board = {{0,1,0},{0,0,1},{1,1,1},{0,0,0}};
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new Solution().gameOfLife(board);
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for (int i = 0; i < board.length; i++) {
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System.out.println(Arrays.toString(board[i]));
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}
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}
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class Solution {
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/**
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* 为了保证当前修改后的状态不会影响下一个状态的判定，设置另外的状态
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* 如题所示，只有三种：
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* 1. 如果当前是活细胞，但是变成了死细胞，那么设置为-1 math.abs为1
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* 2. 如果当前是活细胞，仍然是活细胞，那么不变仍为1 math.abs还是1
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* 3. 如果当前是死细胞，但是变成了活细胞，那么设置为2
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* 那么最后遍历修改完状态之后，将-1修改回为0，2修改回为1
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*
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* @param board
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*/
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public void gameOfLife(int[][] board) {
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// 设置方向来遍历某个节点周围的另外几个节点
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int[] ner = new int[] { -1, 0, 1 };
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// 获取行和列
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int rows = board.length;
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int cols = board[0].length;
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// 遍历每一个节点格子
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for (int row = 0; row < rows; row++) {
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for (int col = 0; col < cols; col++) {
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// 设置当前节点周围的存活细胞的数量
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int liveNer = 0;
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/**
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* 当前节点是[ i , j ]
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* [i-1,j-1] [i-1,j] [i-1,j+1]
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* [ i ,j-1] [ i ,j] [ i ,j+1]
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* [i+1,j-1] [i+1,j] [i+1,j+1]
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* 那么以当前节点为中心，要求周围的节点，则最多是3*3形式
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* 并且所有的行和列都是用当前节点+1或者-1或者不变构成
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* 所以我们设置 ner = {-1,0,1} 来形成遍历
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*/
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for (int i = 0; i < 3; i++) {
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for (int j = 0; j < 3; j++) {
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// 必须保证不计算当前节点(不计算自己)
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if (!(ner[i] == 0 && ner[j] == 0)) {
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// 当前节点的相邻节点坐标
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int r = row + ner[i];
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int c = col + ner[j];
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/**
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* 判断当前周围节点的存活状态，要求满足两个状态
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* 1. 必须保证要在 board 矩阵中
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* 2. 并且起始状态要是存活，则当前状态为1或者-1都可以(因为这两个状态都表示起始状态为活细胞)
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**/
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if ((r >= 0 && r < rows) && (c >= 0 && c < cols) && (Math.abs(board[r][c]) == 1)) {
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liveNer++;
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}
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}
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}
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}
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/**
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* 开始判断当前节点的存活状态
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* 因为遍历到当前节点的时候，还没有开始修改细胞状态，所以还是0和1的细胞状态
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* 那么只需要判断状态变化的即可，否则状态不变
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**/
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if ((board[row][col] == 1) && (liveNer > 3 || liveNer < 2)) {
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// -1 代表这个细胞过去是活的现在死了
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board[row][col] = -1;
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}
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if (board[row][col] == 0 && (liveNer == 3)) {
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// 2 代表这个细胞过去是死的现在活了
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board[row][col] = 2;
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}
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}
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}
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// 再把额外的状态修改回去
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for (int row = 0; row < rows; row++) {
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for (int col = 0; col < cols; col++) {
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if (board[row][col] == 2) {
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board[row][col] = 1;
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}
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if (board[row][col] == -1) {
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board[row][col] = 0;
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}
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}
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}
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}
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}
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}
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<version>4.4.0</version>
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</dependency>
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<!-- <!– https://mvnrepository.com/artifact/org.redisson/redisson-spring-boot-starter –>-->
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<!-- <dependency>-->
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<!-- <groupId>org.redisson</groupId>-->
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<!-- <artifactId>redisson-spring-boot-starter</artifactId>-->
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<!-- <version>3.23.5</version>-->
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<!-- </dependency>-->
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<!--redisson-->
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<dependency>
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<groupId>org.redisson</groupId>
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<artifactId>redisson</artifactId>
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<version>3.16.8</version>
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</dependency>
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<!--FastJson-->
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<dependency>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework.amqp</groupId>
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<artifactId>spring-rabbit-test</artifactId>
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<scope>test</scope>
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</dependency>
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<!-- <dependency>-->
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<!-- <groupId>org.springframework.amqp</groupId>-->
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<!-- <artifactId>spring-rabbit-test</artifactId>-->
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<!-- <scope>test</scope>-->
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<!-- </dependency>-->
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</dependencies>
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<build>
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package cn.whaifree.springdemo.config;
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import cn.whaifree.springdemo.utils.Filter.SelfFilter;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.boot.web.servlet.FilterRegistrationBean;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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/**
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* @version 1.0
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* @Author whai文海
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* @Date 2024/10/12 22:15
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* @注释
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*/
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@Slf4j
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@Configuration
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public class FilterConfig {
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@Bean
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public FilterRegistrationBean<SelfFilter> customFilterRegistration() {
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FilterRegistrationBean<SelfFilter> registration = new FilterRegistrationBean<>();
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registration.setFilter(new SelfFilter());
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registration.addUrlPatterns("/*"); // 指定过滤器应用的 URL 模式
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registration.setName("customFilter");
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registration.setOrder(1); // 设置过滤器的顺序
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return registration;
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}
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}
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package cn.whaifree.springdemo.config;
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import org.redisson.Redisson;
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import org.redisson.api.RedissonClient;
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import org.redisson.config.Config;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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/**
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* @version 1.0
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* @Author whai文海
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* @Date 2024/10/12 20:56
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* @注释
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*/
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@Configuration
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public class RedissonConfig {
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@Bean
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public RedissonClient redissonClient() {
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Config config = new Config();
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config.useSingleServer().setAddress("redis://127.0.0.1:6379");
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config.setThreads(10);
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RedissonClient redissonClient = Redisson.create(config);
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return redissonClient;
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}
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}
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package cn.whaifree.springdemo.controller.redEnvelope;
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import jakarta.annotation.Resource;
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import org.redisson.api.RBucket;
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import org.redisson.api.RLock;
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import org.redisson.api.RedissonClient;
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import org.springframework.web.bind.annotation.*;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* @version 1.0
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* @Author whai文海
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* @Date 2024/10/12 20:31
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* @注释
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*/
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@RestController
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@RequestMapping("/redEnvelope")
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public class RedEnvelopeController {
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@Resource
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private RedissonClient redissonClient;
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@GetMapping(value = "/redisson/{key}")
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public String redissonTest(@PathVariable("key") String lockKey) {
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RLock lock = redissonClient.getLock(lockKey);
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try {
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lock.lock();
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Thread.sleep(10000);
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} catch (Exception e) {
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} finally {
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lock.unlock();
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}
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return "已解锁";
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}
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@PostMapping("distribute")
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public String rob(Double amount) {
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// 构造红包数据
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Map<String, Object> redPacket = new HashMap<>();
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redPacket.put("amount", amount);
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redPacket.put("id", System.currentTimeMillis()); // 使用当前时间戳作为红包 ID
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// 存入 Redis 红包列表
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RBucket<Object> redPacketList = redissonClient.getBucket("red_packet_list");
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redPacketList.set(redPacket);
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return "Distributed successfully";
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}
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@PostMapping("rob")
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public String rob(String userId) {
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return "";
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}
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}
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package cn.whaifree.springdemo.utils.Filter;
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import jakarta.servlet.*;
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import jakarta.servlet.annotation.WebFilter;
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import org.springframework.stereotype.Component;
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import java.io.IOException;
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/**
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* @version 1.0
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* @Author whai文海
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* @Date 2024/10/12 22:13
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* @注释
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*/
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@Component
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@WebFilter(filterName = "SelfFilter", urlPatterns = "/*")
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public class SelfFilter implements Filter {
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@Override
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public void init(FilterConfig filterConfig) throws ServletException {
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Filter.super.init(filterConfig);
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}
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@Override
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public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
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System.out.println("SelfFilter doFilter");
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filterChain.doFilter(servletRequest, servletResponse);
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System.out.println("SelfFilter doFilter end");
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}
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@Override
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public void destroy() {
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Filter.super.destroy();
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}
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}
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@ -12,6 +12,15 @@ spring:
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port: 6379
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# 选择db1
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database: 3
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redis:
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redisson:
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file: classpath:redisson.yaml
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rabbitmq:
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listener:
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direct:
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auto-startup: false
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# springdoc-openapi项目配置
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27
springDemo/src/main/resources/lua/RobEnvelope.lua
Normal file
27
springDemo/src/main/resources/lua/RobEnvelope.lua
Normal file
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local userHashKey = KEYS[1] -- 用户领取记录 Hash 表键
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local redPacketListKey = KEYS[2] -- 红包列表键
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local userRecordListKey = KEYS[3] -- 用户领取记录列表键
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local userId = ARGV[1] -- 用户 ID
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-- 检查用户是否已经领取过红包
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local exists = redis.call('HEXISTS', userHashKey, userId)
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if exists == 1 then
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return nil
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end
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-- 从红包列表中取出一条红包数据
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local redPacketData = redis.call('RPOP', redPacketListKey)
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if not redPacketData then
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return nil
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end
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-- 解析红包数据
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local redPacket = cjson.decode(redPacketData)
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-- 存储用户领取记录
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redis.call('HSET', userHashKey, userId, redPacketData)
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-- 将红包领取信息存入用户领取记录列表
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redis.call('LPUSH', userRecordListKey, redPacketData)
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return redPacket
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42
springDemo/src/main/resources/redisson.yaml
Normal file
42
springDemo/src/main/resources/redisson.yaml
Normal file
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# 单节点配置
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singleServerConfig:
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||||
# 连接空闲超时，单位：毫秒
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idleConnectionTimeout: 10000
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||||
# 连接超时，单位：毫秒
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connectTimeout: 10000
|
||||
# 命令等待超时，单位：毫秒
|
||||
timeout: 3000
|
||||
# 命令失败重试次数,如果尝试达到 retryAttempts（命令失败重试次数） 仍然不能将命令发送至某个指定的节点时，将抛出错误。
|
||||
# 如果尝试在此限制之内发送成功，则开始启用 timeout（命令等待超时） 计时。
|
||||
retryAttempts: 3
|
||||
# 命令重试发送时间间隔，单位：毫秒
|
||||
retryInterval: 1500
|
||||
# 密码
|
||||
#password: redis.shbeta
|
||||
# 单个连接最大订阅数量
|
||||
subscriptionsPerConnection: 5
|
||||
# 客户端名称
|
||||
#clientName: axin
|
||||
# # 节点地址
|
||||
address: redis://127.0.0.1:6379
|
||||
# 发布和订阅连接的最小空闲连接数
|
||||
subscriptionConnectionMinimumIdleSize: 1
|
||||
# 发布和订阅连接池大小
|
||||
subscriptionConnectionPoolSize: 50
|
||||
# 最小空闲连接数
|
||||
connectionMinimumIdleSize: 32
|
||||
# 连接池大小
|
||||
connectionPoolSize: 64
|
||||
# 数据库编号
|
||||
database: 6
|
||||
# DNS监测时间间隔，单位：毫秒
|
||||
dnsMonitoringInterval: 5000
|
||||
# 线程池数量,默认值: 当前处理核数量 * 2
|
||||
#threads: 0
|
||||
# Netty线程池数量,默认值: 当前处理核数量 * 2
|
||||
#nettyThreads: 0
|
||||
# 编码
|
||||
#codec: !<org.redisson.codec.JsonJacksonCodec> {}
|
||||
## 传输模式
|
||||
#transportMode : "NIO"
|
||||
#
|
||||
@ -0,0 +1,58 @@
|
||||
package cn.whaifree.springdemo;
|
||||
|
||||
import lombok.extern.slf4j.Slf4j;
|
||||
import org.junit.jupiter.api.Test;
|
||||
import org.redisson.api.RedissonClient;
|
||||
import org.springframework.beans.factory.annotation.Autowired;
|
||||
import org.springframework.boot.test.context.SpringBootTest;
|
||||
|
||||
import java.util.concurrent.CountDownLatch;
|
||||
import java.util.concurrent.locks.Lock;
|
||||
|
||||
@SpringBootTest
|
||||
@Slf4j
|
||||
class SpringDemoApplicationTests {
|
||||
|
||||
@Test
|
||||
void contextLoads() {
|
||||
}
|
||||
// 注入 RedissonClient
|
||||
@Autowired
|
||||
RedissonClient redissonClient;
|
||||
|
||||
// 计数器
|
||||
private int count;
|
||||
|
||||
@Test
|
||||
public void test() throws InterruptedException {
|
||||
|
||||
CountDownLatch countDownLatch = new CountDownLatch(1000);
|
||||
|
||||
for (int i = 0; i < 1000; i++) {
|
||||
|
||||
new Thread(() -> {
|
||||
|
||||
// 每个线程都创建自己的锁对象
|
||||
// 这是基于 Redis 实现的分布式锁
|
||||
Lock lock = this.redissonClient.getLock("counterLock");
|
||||
|
||||
try {
|
||||
// 上锁
|
||||
lock.lock();
|
||||
|
||||
// 计数器自增 1
|
||||
this.count = this.count + 1;
|
||||
|
||||
} finally {
|
||||
// 释放锁
|
||||
lock.unlock();
|
||||
}
|
||||
countDownLatch.countDown();
|
||||
}).start();
|
||||
}
|
||||
|
||||
countDownLatch.await();
|
||||
|
||||
log.info("count = {}", this.count);
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user