Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-12-25 16:35:58.957 ERROR 8816 --- [ main] o.s.boot.SpringApplication : Application startup failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration': Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Tomcat.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.tomcat.jdbc.pool.DataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalStateException: Cannot load driver class: oracle.jdbc.driver.OracleDriver

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Tomcat.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.tomcat.jdbc.pool.DataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalStateException: Cannot load driver class: oracle.jdbc.driver.OracleDriver

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.tomcat.jdbc.pool.DataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalStateException: Cannot load driver class: oracle.jdbc.driver.OracleDriver

Caused by: java.lang.IllegalStateException: Cannot load driver class: oracle.jdbc.driver.OracleDriver

java.lang.IllegalStateException: Cannot load driver class: oracle.jdbc.driver.OracleDriver

你这oracle驱动没加载啊,

http://mvnrepository.com/artifact/oracle

要对应你的oracle版本，上面是maven仓库的信息(ojdbc)

下面是pom配置文件：<?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
com.example.thymeleaf
thymeleaf
0.0.1-SNAPSHOT
jar
thymeleaf
Demo project for Spring Boot And Thymeleaf

org.springframework.boot
spring-boot-starter-parent
1.5.9.RELEASE
<!-- lookup parent from repository -->


UTF-8
UTF-8
1.8


<!-- Spring Boot Web 依赖 -->

org.springframework.boot
spring-boot-starter-thymeleaf

<!-- Spring Boot Mybatis 依赖 -->

org.mybatis.spring.boot
mybatis-spring-boot-starter
1.0.0

<!-- oracle -->

com.oracle
ojdbc6
${ojdbc6.version}

<!-- 支持 @ConfigurationProperties 注解 -->

org.springframework.boot
spring-boot-configuration-processor
true


junit
junit
test

<!-- tomcat 的支持. -->

org.springframework.boot
spring-boot-starter-tomcat
provided


org.apache.tomcat.embed
tomcat-embed-jasper
provided


org.springframework.boot
spring-boot-starter-test
test


org.springframework.boot
spring-boot-starter-data-jpa


com.oracle
ojdbc14
10.2.0.4.0
runtime





org.springframework.boot
spring-boot-maven-plugin

下面是application.properties：

访问端口

server.port=8080

指定日志文件位置

logging.file=E:/spring-boot-thymeleaf.log

指定日志输出级别

logging.level.org.springframework.web=ERROR
logging.level.org.apache=ERROR
logging.level.org.springframework.boot.web=ERROR
#thymeleaf start
spring.thymeleaf.mode=HTML5
spring.thymeleaf.encoding=UTF-8
#spring.thymeleaf.content-type=text/html
#开发时关闭缓存,不然没法看到实时页面
spring.thymeleaf.cache=false
#thymeleaf end
#oracle配置
spring.jpa.database=oracle
spring.datasource.driver-class-name=oracle.jdbc.driver.OracleDriver
spring.datasource.url=jdbc:oracle:thin:@localhost:1521:DWC
spring.datasource.username=test
spring.datasource.password=test
#1
spring.jpa.hibernate.ddl-auto=update
#2
spring.jpa.show-sql=true
spring.jackson.serialization.indent-output=true

Cannot load driver class: oracle.jdbc.driver.OracleDriver
不能加载驱动 ！！！

看着像 oracle ojdbc的版本不对，ojdbc6 配的是jdk6,换个版本试试，中央仓库应该没有资源，你要重新下载个，然后打到本地的maven仓库

 Cannot load driver class: oracle.jdbc.driver.OracleDriver

报错信息确实说的是不能加载驱动，，题主检查下配置依赖了没，，

是不是没有引入mybatis包，

org.mybatis
mybatis
3.4.5

是不是没有引入mybatis包(https://img-ask.csdn.net/upload/201712/25/1514197787_415621.png)

我也碰到过，这个是因为你的配置文件中配置jpa的那几个属性后面有空格，在springboot的jpa配置中，jpa的那几个属性=后面是不能有空格的。。。