Maven多模块spring boot 项目集成jsp，报404找不到jsp问题

访问http://localhost:8080/index 返回结果：
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.

Wed Mar 21 15:01:28 CST 2018
There was an unexpected error (type=Not Found, status=404).
/WEB-INF/jsp/index.jsp

controller代码：
@GetMapping(value = "/index")
public String index(){
System.out.println("------index--------");
return "index";
}

application 配置了
spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp

根据网上查找资料写了一个配置类
@Bean
public InternalResourceViewResolver viewResolver(){
InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
viewResolver.setViewClass(JstlView.class);
viewResolver.setPrefix("/WEB-INF/jsp/");
viewResolver.setSuffix(".jsp");
logger.info("****************/WEB-INF/jsp/*****************************************");
return viewResolver;
}

但是还是没解决问题，------index--------能打印出来，控制台也没报错。求大神指点一下