【转载】@RestController和@Controller+@Responsebody理解

转载于 https://blog.csdn.net/weixin_42449534/article/details/96737040

如果需要返回的是数据（如：JSON、XML或自定义的metatype等数据类型）时，@RestController完全等同于@Controller+@Responsebody：

  • @RestController:返回的直接是index字符串（优先）
  1. @RestController
  2. public class HelloController {
  3.  
  4.     @Autowired
  5.     private GirlProperties girlProperties;
  6.  
  7.     @GetMapping(value = "/hello")
  8.     public String say(){
  9.         //ModelAndView modelAndView = new ModelAndView("index");
  10.         //return modelAndView;
  11.         return "index";
  12.     }
  13. }
  • @Controller:如果需要返回的是index字符串（JSON、XML等数据类型），则需要在每个方法体里面添加@ResponseBody注解（简单理解为@ResponseBody注解就是标记方法体不调用视图解析器）
  1. @Controller
  2. public class HelloController {
  3.  
  4.     @Autowired
  5.     private GirlProperties girlProperties;
  6.  
  7.     @GetMapping(value = "/hello")
  8.     @ResponseBody
  9.     public String say(){
  10.         //ModelAndView modelAndView = new ModelAndView("index");
  11.         //return modelAndView;
  12.         return "index";
  13.     }
  14. }

如果要返回的是jsp、html等页面时两种注解使用方法：

  • @RestController:方法体配合ModelAndView使用
  1. @RestController
  2. public class HelloController {
  3.  
  4.     @Autowired
  5.     private GirlProperties girlProperties;
  6.  
  7.     @GetMapping(value = "/hello")
  8.     public ModelAndView say(){
  9.         ModelAndView modelAndView = new ModelAndView("index");
  10.         return modelAndView;
  11.     }
  12. }
  • @Controller:可直接返回jsp、index等页面（优先）
  1. @Controller
  2. public class HelloController {
  3.  
  4.     @Autowired
  5.     private GirlProperties girlProperties;
  6.  
  7.     @GetMapping(value = "/hello")
  8.     public String say(){
  9.         //ModelAndView modelAndView = new ModelAndView("index");
  10.         //return modelAndView;
  11.         return "index";
  12.     }
  13. }

 

 

index.html

  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <title>demo</title>
  6.  
  7. </head>
  8. <body>
  9. <h1>Hello Spring Boot!</h1>
  10. </body>
  11. </html>

 

posted @ 2021-10-26 14:17  丨Days丨  阅读(73)  评论(0)    收藏  举报