实验环境

1.swagger版本

<dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>2.9.2</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>2.9.2</version>
        </dependency>

列出问题：

Error starting ApplicationContext. To display the conditions report re-run your application with ‘debug’ enabled.
2021-07-11 09:09:39.075 ERROR 11656 — [ restartedMain] o.s.b.d.LoggingFailureAnalysisReporter :

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APPLICATION FAILED TO START

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Description:

An attempt was made to call a method that does not exist. The attempt was made from the following location:

org.springframework.hateoas.server.core.DelegatingLinkRelationProvider.<init>(DelegatingLinkRelationProvider.java:36)

The following method did not exist:

'org.springframework.plugin.core.PluginRegistry org.springframework.plugin.core.PluginRegistry.of(org.springframework.plugin.core.Plugin[])'

The method’s class, org.springframework.plugin.core.PluginRegistry, is available from the following locations:

jar:file:/D:/Environment/apache-maven-3.6.1/maven-repo/org/springframework/plugin/spring-plugin-core/1.2.0.RELEASE/spring-plugin-core-1.2.0.RELEASE.jar!/org/springframework/plugin/core/PluginRegistry.class

The class hierarchy was loaded from the following locations:

org.springframework.plugin.core.PluginRegistry: file:/D:/Environment/apache-maven-3.6.1/maven-repo/org/springframework/plugin/spring-plugin-core/1.2.0.RELEASE/spring-plugin-core-1.2.0.RELEASE.jar

Action:

Correct the classpath of your application so that it contains a single, compatible version of org.springframework.plugin.core.PluginRegistry

Process finished with exit code 0

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大致意思就是jar包冲突，导入swagger依赖是默认会加载spring-plugin-core的jar包，它的版本是1.2.0，如下图：

重点： 不要因为报错提示The following method did not exist 就直接断定swagger自带的包不存在该方法，而在pom文件中强行修改spring-plugin-core的版本，应当先确定在当前项目中确实不存在该方法对应的jar并且依赖没有冲突，否则只会加深依赖之间的冲突 。

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接下来我们便开始寻找与它冲突的jar包：

查找问题

首先查看依赖关系，找到如图的按钮，show Dependencies Dragrams 快捷键Ctrl+Alt+Shift+U

打开后如下图所示

找到红线两端的节点，双击即可跳入到对应的位置，找到对应的位置就可以进行排除，在这里我定位到了Spring Data Rest的依赖

在此处排除该依赖后，检查依赖关系图中是否还有红线（代表依赖冲突），直至全部排出后重启项目即可测试成功！

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