出现这个异常说明了跳转页面的url无对应的值.

原因1:

Application启动类的位置不对.要将Application类放在最外侧,即包含所有子包 
原因:spring-boot会自动加载启动类所在包下及其子包下的所有组件.

原因2:

在springboot的配置文件:application.yml或application.properties中关于视图解析器的配置问题: 
当pom文件下的spring-boot-starter-paren版本高时使用: 
spring.mvc.view.prefix/spring.mvc.view.suffix 
当pom文件下的spring-boot-starter-paren版本低时使用: 
spring.view.prefix/spring.view.suffix

原因3:

控制器的URL路径书写问题 
@RequestMapping(“xxxxxxxxxxxxxx”) 
实际访问的路径与”xxx”不符合.

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