spring boot项目部署Linux时,运行tomcat启动报错

Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-06-09 20:32:20.318 ERROR 23315 --- [ost-startStop-1] 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

查看linux服务器中/webapps/ROOT/WEB-INF/classes下的项目文件，发现不存在application.properties文件

设置由于pom文件里面配置< resources >时未设置打包.properties文件，导致tomcat读取不到.properties文件的配置信息。

在< resources >中加入扫描.properties文件即可 注意往下看

<resource>
    <directory>src/main/resources</directory>
    <includes>
        <include>**/*.properties</include>
    </includes>
</resource>

如果只配置.properties文件可能会导致进入tomcat运行成功后访问项目静态资源文件报错。

异常:
This application has no explicit mapping for /error, so you are seeing this as a fallback.

javax.servlet.ServletException: Circular view path [login]: would dispatch back to the current handler URL [/login] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)

此时需要设置扫描src/main/resources下的全部文件

<build>

        <finalName>jfkj-crm</finalName>

        <!--解决在src/main/java下不能读取xml的问题-->
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
            
            <!--扫描src/main/resources下的全部文件-->
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.*</include>
                </includes>
            </resource>
        </resources>

        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

---