增加模块

DevOps/Git/Git 使用.md

@@ -0,0 +1,40 @@
+```bash
+git add xxx
+
+git commit -m "commit message"
+
+git pull origin master:dev
+
+git fetch origin master:tmp
+
+git merge tmp --no-ff
+
+git push origin dev:master
+
+git branch -d tmp
+```
+
+
+
+```bash
+#切换到当前你自己的分支，获取最新的代码
+git branch consult
+#rebase远程master分支的最新代码，合并到你自己的分支
+git rebase origin/master
+#如果出现冲突，则需要解决冲突
+git diff -w
+#解决冲突文件
+vim 冲突文件
+git rebase origin/master
+git rebase --continue
+git add .
+git commit -m "xx"
+git log
+#然后fetch到当前分支
+git fetch
+#然后push到自己的分支
+git push origin consult
+#push不上去的时候，直接强push(慎用)
+git push -f origin consult
+```
+

Untitled.md

@@ -0,0 +1,22 @@
+# 一
+
+swagger
+
+druid
+
+pageoffice
+
+menucode
+
+
+
+多线程/多进程
+
+springboot/springmvc/ssm
+
+mysql/mongo
+
+kafaka
+
+xpath
+

应用框架/Spring Boot/Spring Boot 简介.md

@@ -0,0 +1,14 @@
+Spring Boot makes it easy to create stand-alone, production-grade Spring based Applications that you can "just run".
+
+We take an opinionated view of the Spring platform and third-party libraries so you can get started with minimum fuss. Most Spring Boot applications need minimal Spring configuration.
+
+If you’re looking for information about a specific version, or instructions about how to upgrade from an earlier release, check out [the project release notes section](https://github.com/spring-projects/spring-boot/wiki#release-notes) on our wiki.
+
+## Features
+
+- Create stand-alone Spring applications
+- Embed Tomcat, Jetty or Undertow directly (no need to deploy WAR files)
+- Provide opinionated 'starter' dependencies to simplify your build configuration
+- Automatically configure Spring and 3rd party libraries whenever possible
+- Provide production-ready features such as metrics, health checks, and externalized configuration
+- Absolutely no code generation and no requirement for XML configuration

筑基/集合/Collection/List.md

@@ -0,0 +1,83 @@
+# ArrayList
+
+![image-20210510125008211](images/image-20210510125008211.png)
+
+默认大小 10
+
+
+
+扩容策略： 1.5 倍扩容
+
+```java
+private void grow(int minCapacity) {
+    // overflow-conscious code
+    int oldCapacity = elementData.length;
+    int newCapacity = oldCapacity + (oldCapacity >> 1);
+    if (newCapacity - minCapacity < 0)
+        newCapacity = minCapacity;
+    if (newCapacity - MAX_ARRAY_SIZE > 0)
+        newCapacity = hugeCapacity(minCapacity);
+    // minCapacity is usually close to size, so this is a win:
+    elementData = Arrays.copyOf(elementData, newCapacity);
+}
+```
+
+非线程安全， add 方法先判断是否扩容，然后增加元素
+
+
+
+# LinkedList
+
+![image-20210510130337678](images/image-20210510130337678.png)
+
+# Vector
+
+![image-20210510130946803](images/image-20210510130946803.png)
+
+默认大小 10
+
+
+
+扩容策略： 初始化时指定 capacityIncrement，否则是 2 倍扩容
+
+```java
+public Vector(int initialCapacity, int capacityIncrement) {
+    super();
+    if (initialCapacity < 0)
+        throw new IllegalArgumentException("Illegal Capacity: "+
+                                           initialCapacity);
+    this.elementData = new Object[initialCapacity];
+    this.capacityIncrement = capacityIncrement;
+}
+```
+
+
+
+```java
+private void grow(int minCapacity) {
+    // overflow-conscious code
+    int oldCapacity = elementData.length;
+    int newCapacity = oldCapacity + ((capacityIncrement > 0) ?
+                                     capacityIncrement : oldCapacity);
+    if (newCapacity - minCapacity < 0)
+        newCapacity = minCapacity;
+    if (newCapacity - MAX_ARRAY_SIZE > 0)
+        newCapacity = hugeCapacity(minCapacity);
+    elementData = Arrays.copyOf(elementData, newCapacity);
+}
+```
+
+线程安全，使用 java 同步关键字
+
+```java
+public synchronized boolean add(E e) {
+    modCount++;
+    ensureCapacityHelper(elementCount + 1);
+    elementData[elementCount++] = e;
+    return true;
+}
+```
+
+# Stack
+
+![image-20210510133747411](images/image-20210510133747411.png)

筑基/集合/Collection/Set.md

@@ -0,0 +1,33 @@
+# HashSet
+
+![image-20210510140339780](images/image-20210510140339780.png)
+
+
+
+```java
+public HashSet() {
+    map = new HashMap<>();
+}
+```
+
+
+
+```java
+private static final Object PRESENT = new Object();
+
+public boolean add(E e) {
+    return map.put(e, PRESENT)==null;
+}
+```
+
+
+
+## TreeSet
+
+
+
+```java
+public TreeSet() {
+    this(new TreeMap<E,Object>());
+}
+```