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Redis 在这篇文章中被用作一种轻量级的数据存储解决方案，用于替代传统的关系型数据库（如 MySQL），从而减轻数据库压力。通过 Redis ，我们可以快速实现对点赞、浏览、收藏、评论等操作的增减操作，同时利用 Redis 的持久化功能确保数据的存储安全。

常量 定义

系统中定义了一系列常量值，用于不同的操作类型表示不同功能：

private static final String DEFAULT_VALUE = "0:0:0:0:0:0";public static final Byte BYTE_ZERO = 0;public static final Byte BYTE_ONE = 1;public static final Byte BYTE_TWO = 2;public static final Byte BYTE_THREE = 3;public static final Byte BYTE_FOUR = 4;public static final Byte BYTE_FIVE = 5;public static final Byte BYTE_SIX = 6;

主要逻辑

这是实现点赞、浏览、收藏、评论等功能的核心逻辑。以下是具体操作流程：

resetValue 方法

该方法用于对点赞数、收藏数等数量进行增减操作。该方法接收当前值、类型索引及是否为增加操作，返回更新后的值。

private String resetValue(String val, int j, boolean isPlus) {    String[] value = StringUtils.split(val, ":");    Long temp = Long.valueOf(value[j]);    StringBuffer sb = new StringBuffer(16);    if (isPlus) {        temp += 1;    } else {        temp -= 1;    }    value[j] = temp.toString();    for (int i = 0, len = value.length; i < len; i++) {        if (i != len - 1) {            sb.append(value[i]).append(":");        } else {            sb.append(value[i]);        }    }    return sb.toString();}

DataResponse 类

这是一个响应封装类，用于处理不同情况下返回的数据。类支持成功和失败两种状态，分别对应的业务逻辑。

package com.ehl.developerplatform.pojo;import com.ehl.developerplatform.euem.ResponseEnum;import lombok.Data;@Datapublic class DataResponse
   
     {    private boolean success;    private T data;    private Integer code;    private String message;    public DataResponse(boolean success, T data, Integer code, String message) {        this.success = success;        this.data = data;        this.code = code;        this.message = message;    }    public static DataResponse success(ResponseEnum responseEnum) {        return new DataResponse<>(true, null, responseEnum.getStatus(), responseEnum.getMessage());    }    public static DataResponse fail(ResponseEnum responseEnum) {        return new DataResponse<>(false, null, responseEnum.getStatus(), responseEnum.getMessage());    }    // 其他静态方法定义...}
   

ForumDTO 类

该 DTO 类用于数据传输，定义了各个操作的参数，如帖子 ID、用户 ID、操作类型等。

package com.ehl.developerplatform.pojo.dto;import com.ehl.developerplatform.anno.EnumValue;import lombok.Data;import javax.validation.constraints.Min;import javax.validation.constraints.NotEmpty;import javax.validation.constraints.NotNull;import javax.validation.constraints.Size;import java.io.Serializable;@Datapublic class ForumDTO implements Serializable {    @Min(groups = { ForumDTO.SearchComment.class,SearchMyReply.class,searchMyLikePost.class,SearchMyCreatePost.class,SearchPostByBlogId.class,SearchCommentList.class,SearchPostList.class},value = 1, message = "每页数据最少一条")    @NotNull(groups = { ForumDTO.SearchComment.class,SearchMyReply.class,searchMyLikePost.class,SearchMyCreatePost.class,SearchPostByBlogId.class,SearchCommentList.class,SearchPostList.class},message = "[pageSize]字段不能为空")    private Integer pageSize;    @Min(groups = { ForumDTO.SearchComment.class,SearchMyReply.class,searchMyLikePost.class,SearchMyCreatePost.class,SearchCommentList.class,SearchPostByBlogId.class,SearchPostList.class},value = 1, message = "页码必须大于零")    @NotNull(groups = { ForumDTO.SearchComment.class,SearchMyReply.class,searchMyLikePost.class,SearchMyCreatePost.class,SearchCommentList.class,SearchPostByBlogId.class,SearchPostList.class},message = "[pageNum]字段不能为空")    private Integer pageNum;    @EnumValue(groups = { ForumDTO.SearchPostList.class}, byteValues = { 1, 2, 3, 4},message = "更新日期必须为指定值")    private Byte updateTime;    @NotEmpty(groups = { AddTopic.class},message = "帖子名称不能为空")    @Size(groups = { AddTopic.class},max = 30,min = 1,message = "帖子名称长度最长不能超过30个字符 最短不能小于1个字符")    private String name;    @NotNull(groups = { Comment.class,DeleteMyComment.class},message = "父id不能为空")    private Long pid;    @NotNull(groups = { SearchCommentList.class,UpdateInit.class,DeleteMyPost.class,KeepNum.class,Comment.class,SearchLatestNum.class,SearchPostById.class,SearchPostDetailById.class},message = "贴子id不能为空")    private Long postId;    @NotNull(groups = { AddTopic.class,Comment.class,SearchPostByBlogId.class},message = "所属专题id不能为空")    private Long blogId;    @NotNull(groups = { AddTopic.class},message = "帖子分类不能为空")    @EnumValue(groups = { SearchPostList.class,SearchPostByBlogId.class},byteValues = { 1,2,3,4,5,6},message = "帖子分类必须为指定值")    private Byte classFy;    @NotEmpty(groups = { AddTopic.class},message = "所属专题名不能为空")    private String title;    @NotEmpty(groups = { Comment.class,AddTopic.class},message = "评论内容不能为空")    private String content;    private String markText;    @NotEmpty(groups = { AddTopic.class,SearchMyReply.class,KeepNum.class,searchMyLikePost.class,SearchMyCreatePost.class,UpdatePostById.class,DeleteMyComment.class,Comment.class,DeleteMyPost.class,SearchLatestNum.class},message = "用户id不能为空")    private String userId;    @EnumValue(groups = { ForumDTO.KeepNum.class},byteValues = { 1, 2, 3, 4, 5, 6},message = "[operationType]字段必须为指定值")    @NotNull(groups = { ForumDTO.KeepNum.class},message = "[operationType]字段不能为空")    private Byte operationType;    @NotNull(groups = { DeleteMyComment.class},message = "评论id不能为空")    private Long commentId;    @EnumValue(groups = { ForumDTO.KeepNum.class},byteValues = { 0, 1}) private Byte clickType;        // 其他字段...}