springboot指定basePackages后项目启动报错Failed to configure a DataSource: ‘url‘ attribute is not specified...

朱雀 2022-11-07 04:11 246阅读 0赞

由于项目引用了额外的插件包，但插件的包名和项目包名不一致，插件包不在启动类包下，springboot不会自动扫描相关组件类。

指定了**basePackages**为插件包名后，启动报错（之前并未指定，说明默认扫描了启动类所在包）。

报错信息，大概是说找不到数据库配置：

***************************
    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 suitable jdbc url
    
    
    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 (the profiles dev are currently active).

试错试了半天才恍然大悟，原来我把**项目主包**给弄丢了，我只配了插件的**额外包**，没有配项目主包路径，

导致springboot只扫描额外的插件包，项目主包不扫描，启动找不到数据库配置，真是捡了芝麻丢了西瓜！

由此能看出，指定了basePackages后，springboot只会扫描我们指定的包，而不会扫描之前默认的启动类所在包。

所以，指定basePackages时，得把需要扫描的所有包全都配置上。

最终的启动类：

package com.ylb;
    
    @SpringBootApplication(exclude = { DataSourceAutoConfiguration.class })
    @ComponentScan(basePackages = { "com.ylb", "com.yilabao.plugin" })
    public class ApplicationServer {
    
        public static void main(String[] args) {
            SpringApplication app = new SpringApplication(ApplicationServer.class);
            app.addListeners(new ApplicationStartingEventListener());
            app.run(args);
        }
    
    }

关键代码：

@ComponentScan(basePackages = { "com.ylb", "com.yilabao.plugin" })

springboot指定basePackages后项目启动报错Failed to configure a DataSource: ‘url‘ attribute is not specified...

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