<?xml version="1.0" encoding="UTF-8"?>
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
4.0.0
org.springframework.boot
spring-boot-starter-parent
1.5.9.RELEASE
<!-- lookup parent from repository -->
com.example
leave
0.0.1-SNAPSHOT
leave
Demo project for Spring Boot
1.8
org.springframework.boot
spring-boot-starter-data-jpa
org.springframework.boot
spring-boot-starter-jdbc
org.springframework.boot
spring-boot-starter-web
mysql
mysql-connector-java
runtime
org.activiti
activiti-spring-boot-starter-basic
6.0.0
org.springframework.boot
spring-boot-starter-tomcat
org.springframework.boot
spring-boot-starter-web-services
org.springframework.boot
spring-boot-starter-test
test
org.springframework.boot
spring-boot-maven-plugin
------上面是spring boot 的pom.xml
在application.properties配置好数据库参数就可以正常运行。我的想法是在程序启动的时候不连接数据库，在程序运行的过程中按需连接到数据库，但我删除了数据可参数的时候就报错了！！！信息如下：
Description:
Cannot determine embedded database driver class for database type NONE
Action:
If you want an embedded database please put a supported one on the classpath. If you have database settings to be loaded from a particular profile you may need to active it (no profiles are currently active).
在网上找到的解决方案是添加注解(分别如下尝试都出错)：
1.-------------------------
@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class,HibernateJpaAutoConfiguration.class})
@SpringBootApplication
2.---------------------------------------
@SpringBootApplication(exclude={DataSourceAutoConfiguration.class})
3.------------------------------------
@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class,DataSourceTransactionManagerAutoConfiguration.class,HibernateJpaAutoConfiguration.class})
错误信息如下：
Description:
Parameter 0 of method springProcessEngineConfiguration in org.activiti.spring.boot.JpaProcessEngineAutoConfiguration$JpaConfiguration required a bean of type 'javax.sql.DataSource' that could not be found.
- Bean method 'dataSource' not loaded because @ConditionalOnProperty (spring.datasource.jndi-name) did not find property 'jndi-name'
- Bean method 'dataSource' not loaded because @ConditionalOnBean (types: org.springframework.boot.jta.XADataSourceWrapper; SearchStrategy: all) did not find any beans
Action:
Consider revisiting the conditions above or defining a bean of type 'javax.sql.DataSource' in your configuration
