springboot

Question

04-27 23:47:37.257 logback [main] ERROR o.s.boot.SpringApplication - Application run failed
java.lang.IllegalStateException: Error processing condition on com.baomidou.dynamic.datasource.spring.boot.autoconfigure.DynamicDataSourceAutoConfiguration.dataSource
at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:60)
at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:108)
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForBeanMethod(ConfigurationClassBeanDefinitionReader.java:193)
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:153)
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:129)
at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:343)
at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:247)
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:311)
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:112)
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:746)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:564)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301)
at com.seven7m.WebConfigApplication.main(WebConfigApplication.java:36)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at com.intellij.rt.execution.CommandLineWrapper.main(CommandLineWrapper.java:66)
Caused by: java.lang.IllegalStateException: @ConditionalOnMissingBean did not specify a bean using type, name or annotation and the attempt to deduce the bean's type failed
at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.validate(OnBeanCondition.java:494)
at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.(OnBeanCondition.java:443)
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchOutcome(OnBeanCondition.java:154)
at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:47)
... 22 common frames omitted
Caused by: org.springframework.boot.autoconfigure.condition.OnBeanCondition$BeanTypeDeductionException: Failed to deduce bean type for com.baomidou.dynamic.datasource.spring.boot.autoconfigure.DynamicDataSourceAutoConfiguration.dataSource
at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.deducedBeanTypeForBeanMethod(OnBeanCondition.java:524)
at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.deducedBeanType(OnBeanCondition.java:513)
at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.(OnBeanCondition.java:436)
... 24 common frames omitted
Caused by: java.lang.ClassNotFoundException: javax.sql.DataSource
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:471)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:398)
at org.springframework.boot.autoconfigure.condition.FilteringSpringBootCondition.resolve(FilteringSpringBootCondition.java:108)
at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.getReturnType(OnBeanCondition.java:532)
at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.deducedBeanTypeForBeanMethod(OnBeanCondition.java:520)
... 26 common frames omitted
04-27 23:47:37.261 logback [main] WARN o.s.boot.SpringApplication - Unable to close ApplicationContext
java.lang.IllegalStateException: Failed to introspect Class [com.baomidou.dynamic.datasource.spring.boot.autoconfigure.DynamicDataSourceAutoConfiguration] from ClassLoader [java.net.URLClassLoader@3cc2931c]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:485)
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:361)
at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:418)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.lambda$getTypeForFactoryMethod$2(AbstractAutowireCapableBeanFactory.java:765)
at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1737)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:764)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:703)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:674)
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1670)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:570)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:542)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:667)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:659)
at org.springframework.context.support.AbstractApplicationContext.getBeansOfType(AbstractApplicationContext.java:1300)
at org.springframework.boot.SpringApplication.getExitCodeFromMappedException(SpringApplication.java:873)
at org.springframework.boot.SpringApplication.getExitCodeFromException(SpringApplication.java:861)
at org.springframework.boot.SpringApplication.handleExitCode(SpringApplication.java:848)
at org.springframework.boot.SpringApplication.handleRunFailure(SpringApplication.java:788)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:313)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301)
at com.seven7m.WebConfigApplication.main(WebConfigApplication.java:36)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at com.intellij.rt.execution.CommandLineWrapper.main(CommandLineWrapper.java:66)
Caused by: java.lang.NoClassDefFoundError: javax/sql/DataSource
at java.base/java.lang.Class.getDeclaredMethods0(Native Method)
at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3167)
at java.base/java.lang.Class.getDeclaredMethods(Class.java:2310)
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:467)
... 26 common frames omitted
Caused by: java.lang.ClassNotFoundException: javax.sql.DataSource
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:471)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 30 common frames omitted
Disconnected from the target VM, address: '127.0.0.1:50876', transport: 'socket'

Process finished with exit code 1

Answer 1

引自免费微信小程序：皆我百晓生

看起来你遇到了一个Spring Boot应用启动失败的问题，错误信息提示找不到javax.sql.DataSource类。这通常是因为你的项目缺少对Java数据库连接（JDBC）的支持。

为了解决这个问题，你需要在你的项目中添加JDBC的依赖项。如果你使用的是Maven，你可以在pom.xml文件中的部分添加以下内容：

<!-- 添加MySQL JDBC驱动依赖 -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.29</version> <!-- 更新到最新版本 -->
</dependency>

<!-- 或者使用其他数据库，例如Oracle -->
<!-- <dependency>
    <groupId>com.oracle.database.jdbc</groupId>
    <artifactId>ojdbc10</artifactId>
    <version>19.10.0.0</version> <!-- 更新到最新版本 -->
</dependency> -->

<!-- 如果使用的是Spring Boot 2.x及以上版本，添加HikariCP作为数据源实现 -->
<dependency>
    <groupId>com.zaxxer</groupId>
    <artifactId>HikariCP</artifactId>
</dependency>

如果你使用的是Gradle，添加到build.gradle文件的dependencies块中：

// 添加MySQL JDBC驱动依赖
implementation 'mysql:mysql-connector-java:8.0.29' // 更新到最新版本

// 或者使用其他数据库，例如Oracle
// implementation 'com.oracle.database.jdbc:ojdbc10:19.10.0.0' // 更新到最新版本

// 如果使用的是Spring Boot 2.x及以上版本，添加HikariCP作为数据源实现
implementation 'com.zaxxer:HikariCP:4.0.3'

之后，重新编译并运行你的应用，应该可以解决这个问题。注意，如果你的项目已经包含了数据源相关的配置，确保它们是正确的，并且与你选择的JDBC驱动兼容。例如，如果你使用了MyBatis Plus的动态数据源功能，可能还需要在application.properties或application.yml中配置数据源的相关信息。

如果你还有其他关于Spring Boot、MyBatis Plus或数据库连接方面的问题，随时向我提问。