snakeyaml升级2.0版本遇见的坑，解决办法

痛定思痛。 2023-10-14 06:51 72阅读 0赞

**这几天公司做安全漏洞扫描，发现snakeyaml1.x版本有高危漏洞，需要升级到2.0，但是snakeyaml从1.x版本升级到2.0之后报错，项目无法启动**  
2023-07-26 16:56:27,036 main ERROR appenders contains an invalid element or attribute “appender”  
2023-07-26 16:56:27,064 main ERROR Unable to locate appender “Filelog” for logger config “root”  
2023-07-26 16:56:27,064 main ERROR Unable to locate appender “RollingFileWarn” for logger config “root”  
2023-07-26 16:56:27,065 main ERROR Unable to locate appender “RollingFileError” for logger config “root”  
requestId: 2023-07-26 16:56:27.746 ERROR \[main\] org.springframework.boot.SpringApplication - Application run failed  
java.lang.NoSuchMethodError: org.yaml.snakeyaml.representer.Representer: method ()V not found  
at org.springframework.boot.env.OriginTrackedYamlLoader.createYaml(OriginTrackedYamlLoader.java:76) ~\[spring-boot-2.5.14.jar:2.5.14\]  
at org.springframework.boot.env.OriginTrackedYamlLoader.createYaml(OriginTrackedYamlLoader.java:71) ~\[spring-boot-2.5.14.jar:2.5.14\]  
at org.springframework.beans.factory.config.YamlProcessor.process(YamlProcessor.java:164) ~\[spring-beans-5.3.21.jar:5.3.21\]  
at org.springframework.boot.env.OriginTrackedYamlLoader.load(OriginTrackedYamlLoader.java:84) ~\[spring-boot-2.5.14.jar:2.5.14\]  
at org.springframework.boot.env.YamlPropertySourceLoader.load(YamlPropertySourceLoader.java:50) ~\[spring-boot-2.5.14.jar:2.5.14\]  
at org.springframework.boot.context.config.StandardConfigDataLoader.load(StandardConfigDataLoader.java:54) ~\[spring-boot-2.5.14.jar:2.5.14\]  
at org.springframework.boot.context.config.StandardConfigDataLoader.load(StandardConfigDataLoader.java:36) ~\[spring-boot-2.5.14.jar:2.5.14\]  
at org.springframework.boot.context.config.ConfigDataLoaders.load(ConfigDataLoaders.java:107) ~\[spring-boot-2.5.14.jar:2.5.14\]  
at org.springframework.boot.context.config.ConfigDataImporter.load(ConfigDataImporter.java:128) ~\[spring-boot-2.5.14.jar:2.5.14\]

![在这里插入图片描述][e255e5bff53d44899751c0dad2a17eba.png]**描述**  
原因是因为Representer类的无参构成方法移除了，但是我们的springboot版本还在加载无参构造导致的报错。

**解决方法**  
重写org.yaml.snakeyaml.representer包下的Representer类，增加无参构造方法  
![在这里插入图片描述][64d858f6983145c1b30a4a157bf0bed5.png]  
![在这里插入图片描述][a9289c84784e4cdc8f61d80a44ed1a4b.png]  
增加红框中的无参构造方法

[e255e5bff53d44899751c0dad2a17eba.png]: https://img-blog.csdnimg.cn/e255e5bff53d44899751c0dad2a17eba.png
[64d858f6983145c1b30a4a157bf0bed5.png]: https://img-blog.csdnimg.cn/64d858f6983145c1b30a4a157bf0bed5.png
[a9289c84784e4cdc8f61d80a44ed1a4b.png]: https://img-blog.csdnimg.cn/a9289c84784e4cdc8f61d80a44ed1a4b.png