升级SnakeYAML与Spring Boot后遭遇Representer构造方法缺失错误求助

问题原因 #

SnakeYAML 2.0对org.yaml.snakeyaml.representer.Representer类做了破坏性变更，移除了它的无参构造函数<init>()V，但Spring Boot 2.7.10依赖的Spring 5.3.x版本的YamlProcessor类仍在调用这个已被移除的构造方法，导致项目启动时抛出嵌套NoSuchMethodError的BeanDefinitionStoreException。

修复方案 #

方案一：降级SnakeYAML至兼容版本 #

Spring Boot 2.7.x的依赖管理体系默认适配SnakeYAML 1.33版本，该版本与Spring 5.3.x完全兼容。在pom.xml中显式指定该版本即可：

<dependency>
    <groupId>org.yaml</groupId>
    <artifactId>snakeyaml</artifactId>
    <version>1.33</version>
</dependency>

方案二：升级Spring Boot到3.0+版本 #

Spring Boot 3.0及以上版本已适配SnakeYAML 2.x系列，若项目技术栈允许（需Java 17+），直接升级Spring Boot版本即可，依赖管理会自动匹配兼容的SnakeYAML版本，无需手动调整。

错误信息参考 #

org.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration class  nested exception is java.lang.NoSuchMethodError: org.yaml.snakeyaml.representer.Representer: method <init>()V not found
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:189) ~[spring-context-5.3.19.jar:5.3.19]
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:331) ~[spring-context-5.3.19.jar:5.3.19]
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:247) ~[spring-context-5.3.19.jar:5.3.19]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:311) ~[spring-context-5.3.19.jar:5.3.19]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:112) ~[spring-context-5.3.19.jar:5.3.19]
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:746) ~[spring-context-5.3.19.jar:5.3.19]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:564) ~[spring-context-5.3.19.jar:5.3.19]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.10.jar:2.7.10]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:731) ~[spring-boot-2.7.10.jar:2.7.10]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.10.jar:2.7.10]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) ~[spring-boot-2.7.10.jar:2.7.10]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1303) ~[spring-boot-2.7.10.jar:2.7.10]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1292) ~[spring-boot-2.7.10.jar:2.7.10]
    at 
Caused by: java.lang.NoSuchMethodError: org.yaml.snakeyaml.representer.Representer: method <init>()V not found
    at org.springframework.beans.factory.config.YamlProcessor.createYaml(YamlProcessor.java:187) ~[spring-beans-5.3.20.jar:5.3.20]
    at org.springframework.beans.factory.config.YamlProcessor.process(YamlProcessor.java:164) ~[spring-beans-5.3.20.jar:5.3.20]
    at org.springframework.beans.factory.config.YamlPropertiesFactoryBean.createProperties(YamlPropertiesFactoryBean.java:135) ~[spring-beans-5.3.20.jar:5.3.20]
    at org.springframework.beans.factory.config.YamlPropertiesFactoryBean.getObject(YamlPropertiesFactoryBean.java:115) ~[spring-beans-5.3.20.jar:5.3.20]
    at 
    at org.springframework.context.annotation.ConfigurationClassParser.processPropertySource(ConfigurationClassParser.java:463) ~[spring-context-5.3.19.jar:5.3.19]
    at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:280) ~[spring-context-5.3.19.jar:5.3.19]
    at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:250) ~[spring-context-5.3.19.jar:5.3.19]
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:199) ~[spring-context-5.3.19.jar:5.3.19]
    at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:304) ~[spring-context-5.3.19.jar:5.3.19]
    at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:250) ~[spring-context-5.3.19.jar:5.3.19]
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:207) ~[spring-context-5.3.19.jar:5.3.19]
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:175) ~[spring-context-5.3.19.jar:5.3.19]
    ... 13 more

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