Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.
错误日志:
2019-07-13 16:04:26.318 info 21144 --- [ main] o.apache.catalina.core.standardservice : stopping service [tomcat] 2019-07-13 16:04:26.325 warn 21144 --- [ main] o.a.c.loader.webappclassloaderbase : the web application [root] appears to have started a thread named [abandoned connection cleanup thread] but has failed to stop it. this is very likely to create a memory leak. stack trace of thread: java.lang.object.wait(native method) java.lang.ref.referencequeue.remove(referencequeue.java:143) com.mysql.jdbc.abandonedconnectioncleanupthread.run(abandonedconnectioncleanupthread.java:43) 2019-07-13 16:04:26.333 info 21144 --- [ main] conditionevaluationreportlogginglistener : error starting applicationcontext. to display the conditions report re-run your application with 'debug' enabled. 2019-07-13 16:04:26.339 error 21144 --- [ main] o.s.b.d.loggingfailureanalysisreporter : *************************** application failed to start *************************** description: failed to configure a datasource: 'url' attribute is not specified and no embedded datasource could be configured. reason: failed to determine a suitable driver class action: consider the following: if you want an embedded database (h2, hsql or derby), please put it on the classpath. if you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active). disconnected from the target vm, address: '127.0.0.1:7870', transport: 'socket' process finished with exit code 1
问题分析及解决方案
问题原因: mybatis没有找到合适的加载类,其实是大部分spring - datasource - url没有加载成功,分析原因如下所示.
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datasourceautoconfiguration会自动加载.
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没有配置spring - datasource - url 属性.
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spring - datasource - url 配置的地址格式有问题.
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配置 spring - datasource - url的文件没有加载.
- profiles文件夹名称冲突
方案一 (解决原因1)
排除此类的autoconfig。启动以后就可以正常运行。
@springbootapplication(exclude= {datasourceautoconfiguration.class})
但是这个显然是治标不治本的,除非你不打算引用mybatis。
方案二 (解决原因2)
在application.properties/或者application.yml文件中没有添加数据库配置信息.
spring: datasource: url: jdbc:mysql://localhost:3306/read_data?useunicode=true&characterencoding=utf-8&usessl=false username: root password: 123456 driver-class-name: com.mysql.jdbc.driver
方案三(解决原因3)
spring.datasource.url = jdbc:mysql://192.168.0.20:1504/f_me?setunicode=true&characterencoding=utf8
方案四 (解决原因4)
yml或者properties文件没有被扫描到,需要在pom文件中<build></build>添加如下.来保证文件都能正常被扫描到并且加载成功.
<!-- 如果不添加此节点mybatis的mapper.xml文件都会被漏掉。 --> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.yml</include> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> <resource> <directory>src/main/resources</directory> <includes> <include>**/*.yml</include> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> </resources>
方案五 (解决原因5)
以上4个我逐一尝试了,仍然没能解决问题,于是想到会不会是profiles文件夹名称问题,将profiles修改成config,问题解决。
如图:
报错时:
解决后:
特别感谢以下链接地址,以上部分信息直接借鉴的以下地址中的内容:
- failed to configure a datasource: 'url' attribute is not specified and no embedded datasource could be configured
- springboot 2.0 报错: failed to configure a datasource: 'url' attribute is not specified and no embe...
- failed to configure a datasource: 'url' attribute is not specified and no embedded datasource could be configured. spring
- resolving “failed to configure a datasource” error
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