FixedPrincipalExtractor (Spring Boot API)

java.lang.Object
- org.springframework.boot.autoconfigure.security.oauth2.resource.FixedPrincipalExtractor

所有已实现的接口:
PrincipalExtractor
```
public class FixedPrincipalExtractor
extends Object
implements PrincipalExtractor
```
Default implementation of PrincipalExtractor. Extracts the principal from the map with well known keys.
从以下版本开始:
1.4.0

- 构造器概要
  构造器
  构造器说明
  FixedPrincipalExtractor()
- 方法概要
  所有方法实例方法具体方法
  修饰符和类型方法说明
  Object extractPrincipal(Map<String,Object> map)
  Extract the principal that should be used for the token.
  - 从类继承的方法 java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - FixedPrincipalExtractor
```
public FixedPrincipalExtractor()
```
- 方法详细资料
  - extractPrincipal
```
public Object extractPrincipal(Map<String,Object> map)
```
    从接口复制的说明: PrincipalExtractor
    Extract the principal that should be used for the token.
    指定者:
    extractPrincipal 在接口中 PrincipalExtractor
    参数:
    map - the source map
    返回:
    the extracted principal or null