Update 'README.md'

README.md

@@ -1,3 +1,19 @@
 # poi
 
-读写excel
+读写excel
+
+## Usage
+
+```
+        <dependency>
+            <groupId>org.apache.poi</groupId>
+            <artifactId>poi</artifactId>
+            <version>5.2.5</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.poi</groupId>
+            <artifactId>poi-ooxml</artifactId>
+            <version>5.2.5</version>
+        </dependency>
+
+```