From 38453c5e315ec45a522ec55254f88f320b018601 Mon Sep 17 00:00:00 2001
From: Anko <52566311+Smartdousha@users.noreply.github.com>
Date: Thu, 17 Nov 2022 08:54:47 +0800
Subject: [PATCH] =?UTF-8?q?doc:=20=E6=B7=BB=E5=8A=A0=20java=E5=8F=8D?=
 =?UTF-8?q?=E5=B0=84:white=5Fcheck=5Fmark:=20(#103)?=
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---
 docs/java.md | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/docs/java.md b/docs/java.md
index 4416523..2a80f14 100644
--- a/docs/java.md
+++ b/docs/java.md
@@ -783,6 +783,26 @@ try {
 }
 ```
 
+### 反射
+
+```java
+/**
+* 利用反射动态加载依赖库
+* java9及以上版本可用
+* @param jar jar文件
+*/
+Method method = URLClassLoader.class.getDeclaredMethod("addURL", URL.class);
+method.setAccessible(true);
+MethodHandle addURL = lookup.unreflect(method);
+URL url = jar.toURI().toURL();
+URLClassLoader urlClassLoader = new URLClassLoader(new URL[] {url});
+addURL.invoke(urlClassLoader, url);
+//java8
+Method method = URLClassLoader.class.getDeclaredMethod("addURL", URL.class);
+method.setAccessible(true);
+method.invoke(classLoader, url);
+```
+
 ### util工具类
 
 - `ArrayDeque` 提供 resizable-array 并实现 Deque 接