From d3089f54a262ef95f6c8963fd9cdc1e550c3ec4c Mon Sep 17 00:00:00 2001
From: hubin <jobob@qq.com>
Date: Mon, 27 May 2019 09:21:06 +0800
Subject: [PATCH 1/2] =?UTF-8?q?=E8=8E=B7=E5=8F=96=E6=96=87=E7=AB=A0?=
 =?UTF-8?q?=E7=9A=84=E4=B8=8A=E4=B8=8B=E5=86=85=E5=AE=B9=E9=9B=86=E5=90=88?=
 =?UTF-8?q?=E5=A4=A9=E6=89=8D=E4=BB=A3=E7=A0=81?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 java/PreAfterList.java | 45 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 java/PreAfterList.java

diff --git a/java/PreAfterList.java b/java/PreAfterList.java
new file mode 100644
index 0000000..279e049
--- /dev/null
+++ b/java/PreAfterList.java
@@ -0,0 +1,45 @@
+package com.gitee.bullshit.code;
+
+import com.baomidou.mybatisplus.core.toolkit.Wrappers;
+
+public class PreAfterList {
+
+    // 需求：根据 ID 获取指定 ID 文章的包括当前 ID 及上一条和下一条内容集合
+    // 原样贴出天才同事的操作如下，看完肺都气炸了！！ 看官们你觉得正确做法是什么？？
+    public ArticleVO getArticleVO(Long id) {
+        ArticleVO vo = new ArticleVO(getById(id));
+        List<Article> list = articleMapper.selectList(baseMapper.selectList(Wrappers.<Article>lambdaQuery().orderByDesc(Article::getCreateTime)));
+        if (list.size() == 1) {
+            return vo;
+        } else if (list.size() == 2) {
+            if (list.get(0).getId().equals(vo.getId())) {
+                // first is itself
+                vo.setAfter(list.get(1));
+            } else {
+                vo.setPre(list.get(0));
+            }
+        } else {
+            // > 3
+            Article pre = list.get(0);
+            if (pre.getId().equals(vo.getId())) {
+                vo.setPre(null);
+                vo.setAfter(list.get(1));
+                return vo;
+            }
+            for (Article article : list) {
+                if (article.getId().equals(vo.getId())) {
+                    vo.setPre(pre);
+                    int preIdx = list.indexOf(pre);
+                    if (preIdx + 2 >= list.size()) {
+                        break;
+                    }
+                    vo.setAfter(list.get(preIdx + 2));
+                    break;
+                } else {
+                    pre = article;
+                }
+            }
+        }
+        return vo;
+    }
+}
-- 
Gitee


From 7efd016049373d6f9b34e15beff91901e88ca49b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=9D=92=E8=8B=97?= <243194995@qq.com>
Date: Mon, 27 May 2019 09:27:17 +0800
Subject: [PATCH 2/2] =?UTF-8?q?=E6=9B=B4=E6=96=B0=20PreAfterList.java?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 java/PreAfterList.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/java/PreAfterList.java b/java/PreAfterList.java
index 279e049..f73552c 100644
--- a/java/PreAfterList.java
+++ b/java/PreAfterList.java
@@ -4,11 +4,11 @@ import com.baomidou.mybatisplus.core.toolkit.Wrappers;
 
 public class PreAfterList {
 
-    // 需求：根据 ID 获取指定 ID 文章的包括当前 ID 及上一条和下一条内容集合
+    // 需求：根据 ID 获取指定 ID 文章，包括当前 ID 及上一条和下一条的内容集合
     // 原样贴出天才同事的操作如下，看完肺都气炸了！！ 看官们你觉得正确做法是什么？？
     public ArticleVO getArticleVO(Long id) {
         ArticleVO vo = new ArticleVO(getById(id));
-        List<Article> list = articleMapper.selectList(baseMapper.selectList(Wrappers.<Article>lambdaQuery().orderByDesc(Article::getCreateTime)));
+        List<Article> list = articleMapper.selectList(Wrappers.<Article>lambdaQuery().orderByDesc(Article::getCreateTime));
         if (list.size() == 1) {
             return vo;
         } else if (list.size() == 2) {
-- 
Gitee