QUESTION:@Controller与@RestController的区别以及ircular view path [ad]: would dispatch back to the current handler异常？

在编写SpringBOOT的时候，在启动时出现异常:

javax.servlet.ServletException: Circular view path [index]: would dispatch back to the current handler URL [/index] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)

ANSWER:

官方文档：

@RestController is a stereotype annotation that combines @ResponseBody and @Controller.

意思是：
@RestController注解相当于@ResponseBody ＋ @Controller合在一起的作用。

1)

如果只是使用@RestController注解Controller，则Controller中的方法无法返回jsp页面，配置的视图解析器InternalResourceViewResolver不起作用，返回的内容就是Return 里的内容。

例如：本来应该到success.jsp页面的，则其显示success.

2)

如果需要返回到指定页面，则需要用 @Controller配合视图解析器InternalResourceViewResolver才行。

3)

如果需要返回JSON，XML或自定义mediaType内容到页面，则需要在对应的方法上加上@ResponseBody注解。

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@Controller与@RestController的区别以及ircular view path [ad]: would dispatch back to the current handler异常

QUESTION:@Controller与@RestController的区别以及ircular view path [ad]: would dispatch back to the current handler异常？

ANSWER:

官方文档：

1)

2)

3)

@Controller与@RestController的区别以及ircular view path [ad]: would dispatch back to the current handler异常相关推荐

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