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})

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)

在spring xml配置文件中引用了数据库地址 所以需要对:等进行转义处理.但是在application.properties/或者application.yml文件并不需要转义,错误和正确方法写在下面了.

//错误示例

spring.datasource.url = jdbc:mysql\://192.168.0.20\:1504/f_me?setUnicode=true&characterEncoding=utf8

//正确示例

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>