springboot启动报错YAMLException Stream closed

错误信息如下：

Caused by: org.yaml.snakeyaml.error.YAMLException: java.io.IOException: Stream closed
    at org.yaml.snakeyaml.reader.StreamReader.update(StreamReader.java:200)
    at org.yaml.snakeyaml.reader.StreamReader.(StreamReader.java:60)
    at org.yaml.snakeyaml.Yaml.load(Yaml.java:412)
    at com.config.ConfigProvider.(ConfigProvider.java:20)
    ... 49 more
Caused by: java.io.IOException: Stream closed
    at java.io.PushbackInputStream.ensureOpen(PushbackInputStream.java:57)
    at java.io.PushbackInputStream.read(PushbackInputStream.java:149)
    at org.yaml.snakeyaml.reader.UnicodeReader.init(UnicodeReader.java:90)
    at org.yaml.snakeyaml.reader.UnicodeReader.read(UnicodeReader.java:122)
    at java.io.Reader.read(Reader.java:123)
    at org.yaml.snakeyaml.reader.StreamReader.update(StreamReader.java:184)
    ... 55 more

解决方案：

吼吼，犯了一个低级错误呢，有可能是你的项目刚执行了maven clean ,忘记 install 了。
重新install一次即可。