ServletManager (Apache Dubbo Extensions 3.3.0 API)

```
public class ServletManager
extends Object
```
TODO this may not be a pretty elegant solution,

字段
限定符和类型	字段和说明
`static int`	`EXTERNAL_SERVER_PORT`

构造器
构造器和说明
`ServletManager()`

所有方法静态方法实例方法具体方法
限定符和类型	方法和说明
`void`	`addServletContext(int port, javax.servlet.ServletContext servletContext)`
`static ServletManager`	`getInstance()`
`javax.servlet.ServletContext`	`getServletContext(int port)`
`void`	`removeServletContext(int port)`

public static ServletManager getInstance()

public void addServletContext(int port,
                              javax.servlet.ServletContext servletContext)

public void removeServletContext(int port)

public javax.servlet.ServletContext getServletContext(int port)

类 ServletManager