Spring @Controller和@RestController的区别?
@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。
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。
package com.itheima.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.ApplicationContext; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import java.util.Arrays; import java.util.List; @RestController @RequestMapping public class ViewAllBeans { @Autowired private ApplicationContext applicationContext; @GetMapping("/beanList") public List<String> beanList() { return Arrays.asList(applicationContext.getBeanDefinitionNames()); } }
结果如下:
0 "org.springframework.context.annotation.internalConfigurationAnnotationProcessor" 1 "org.springframework.context.annotation.internalAutowiredAnnotationProcessor" 2 "org.springframework.context.annotation.internalCommonAnnotationProcessor" 3 "org.springframework.context.event.internalEventListenerProcessor" 4 "org.springframework.context.event.internalEventListenerFactory" 5 "springMvcConfig" 6 "bookController"
REF
https://www.cnblogs.com/clwydjgs/p/9255046.html
https://blog.csdn.net/gg12365gg/article/details/51345601