springboot整合mybatis报错

矫情吗；* 2022-05-17 07:54 259阅读 0赞

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.sql.DataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/boot/bind/RelaxedDataBinder
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
        at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:582) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
        ... 18 common frames omitted
    Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/bind/RelaxedDataBinder
        at com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder.bind(DruidDataSourceBuilder.java:48) ~[druid-spring-boot-starter-1.1.0.jar:na]
        at com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder.build(DruidDataSourceBuilder.java:41) ~[druid-spring-boot-starter-1.1.0.jar:na]
        at com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceAutoConfigure.dataSource(DruidDataSourceAutoConfigure.java:44) ~[druid-spring-boot-starter-1.1.0.jar:na]
        at com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceAutoConfigure$$EnhancerBySpringCGLIB$$c009f255.CGLIB$dataSource$0(<generated>) ~[druid-spring-boot-starter-1.1.0.jar:na]
        at com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceAutoConfigure$$EnhancerBySpringCGLIB$$c009f255$$FastClassBySpringCGLIB$$b04c508e.invoke(<generated>) ~[druid-spring-boot-starter-1.1.0.jar:na]
        at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-5.0.8.RELEASE.jar:5.0.8.RELEASE]
        at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:361) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
        at com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceAutoConfigure$$EnhancerBySpringCGLIB$$c009f255.dataSource(<generated>) ~[druid-spring-boot-starter-1.1.0.jar:na]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_144]
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_144]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_144]
        at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_144]
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
        ... 19 common frames omitted
    Caused by: java.lang.ClassNotFoundException: org.springframework.boot.bind.RelaxedDataBinder
        at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_144]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_144]
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335) ~[na:1.8.0_144]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_144]
        ... 32 common frames omitted

改了一下pom.xml中alibaba的druid数据库连接池配置的依赖  
![这里写图片描述][70]

就好了。项目正常启动，  
但是还是有问题，页面访问不了，[http://localhost:8080/user/getUserById?id=1][http_localhost_8080_user_getUserById_id_1]报错，状态为404  
发现原来springboot的项目启动类必须要跟类文件夹同级  
![这里写图片描述][70 1]

还要注意这个配置  
![这里写图片描述][70 2]

[70]: /images/20220517/2d9b8a320aa145be92f1e8b70dca4d16.png
[http_localhost_8080_user_getUserById_id_1]: http://localhost:8080/user/getUserById?id=1
[70 1]: /images/20220517/8b4354dafcdd40fdb291205e28e1cdb3.png
[70 2]: /images/20220517/3a71b2e9f9c549c9ab67bac83dcf2ef7.png