Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Fri Mar 23 10:34:26 CST 2018
There was an unexpected error (type=Internal Server Error, status=500).
Circular view path [index]: would dispatch back to the current handler URL [/home/index] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)
解決辦法：
方法1.在請求方法上加註解：@ResponseBody，無需模板文件
@RequestMapping("/home")
@Controller()
public class HomeController {
@ResponseBody
@RequestMapping("/index")
public String index() {
return "index";
}
}
方法2. 用thymeleaf模板
在pom.xml的dependencies元素內加靜態模板依賴
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency>
在resources/templates/創建html模板文件，文件名與請求方法return的字符串一樣，擴展名html： index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <p th:text="${data}"></p> </body> </html>
@RequestMapping("/home")
@Controller()
public class HomeController {
@RequestMapping("/index")
public String index(HashMap<String,Object> map) {
map.put("data","index.html");
return "index";
}
}