add docs for spring support.

README.md

@@ -106,6 +106,28 @@ dependencies {
 }
 ```
 
+### `Fastjson Extension`扩展模块
+
+如果项目使用`SpringFramework`等框架，可以使用`fastjson-extension`模块，使用方式参考 [SpringFramework Support](docs/spring_support_cn.md)。
+
+`Maven`:
+
+```xml
+<dependency>
+    <groupId>com.alibaba.fastjson2</groupId>
+    <artifactId>fastjson2-extension</artifactId>
+    <version>2.0.4</version>
+</dependency>
+```
+
+`Gradle`:
+
+```kotlin
+dependencies {
+    implementation("com.alibaba.fastjson2:fastjson2-extension:2.0.4")
+}
+```
+
 # 2. 简单使用
 
 在`fastjson v2`中，`package`和`1.x`不一样，是`com.alibaba.fastjson2`。如果你之前用的是`fastjson1`，大多数情况直接更包名就即可。

README_EN.md

@@ -86,7 +86,7 @@ dependencies {
 
 ### `Kotlin` integration module `fastjson-kotlin`
 
-If your project uses `kotlin`, you can use the` Fastjson-Kotlin` module, and use the characteristics of `kotlin`.
+If your project uses `kotlin`, you can use the `Fastjson-Kotlin` module, and use the characteristics of `kotlin`.
 
 `Maven`:
 
@@ -106,6 +106,29 @@ dependencies {
 }
 ```
 
+### `Extension` integration module `fastjson-extension`
+
+If your project uses a framework such as `SpringFramework`, you can use the `fastjson-extension` module, please refer to the usage [SpringFramework Support](docs/spring_support_en.md).
+
+`Maven`:
+
+```xml
+<dependency>
+    <groupId>com.alibaba.fastjson2</groupId>
+    <artifactId>fastjson2-extension</artifactId>
+    <version>2.0.4</version>
+</dependency>
+```
+
+`Gradle`:
+
+```kotlin
+dependencies {
+    implementation("com.alibaba.fastjson2:fastjson2-extension:2.0.4")
+}
+```
+
+
 # 2. Usage
 
 The package name of `fastjson v2` is different from `fastjson v1`. It is `com.alibaba.fastjson2`. If you used `fastjson v1` before, simply change the package name.

docs/index.md

@@ -91,6 +91,28 @@ dependencies {
 }
 ```
 
+### `Fastjson Extension`扩展模块
+
+如果项目使用`SpringFramework`等框架，可以使用`fastjson-extension`模块，使用方式参考 [SpringFramework Support](docs/spring_support_cn.md)。
+
+`Maven`:
+
+```xml
+<dependency>
+    <groupId>com.alibaba.fastjson2</groupId>
+    <artifactId>fastjson2-extension</artifactId>
+    <version>2.0.4</version>
+</dependency>
+```
+
+`Gradle`:
+
+```kotlin
+dependencies {
+    implementation("com.alibaba.fastjson2:fastjson2-extension:2.0.4")
+}
+```
+
 # 2 简单使用
 
 在`fastjson v2`中，`package`和`1.x`不一样，是`com.alibaba.fastjson2`。如果你之前用的是`fastjson1`，大多数情况直接更包名就即可。