响应

# 响应

在SpringMVC中，我们该如何返回物件给请求源呢？

# 页面返回

默认情况下仅支持返回.jsp格式的

@Controller  
public class UserController {  
    @RequestMapping("/save")  
    public String save(){  
        System.out.println(request.getHeader("Cache-Control"));  
        return "test.jsp";  
    }  
}

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# 文本返回

@Controller  
@ResponseBody
public class UserController {  
    @RequestMapping("/save")  
    public String save(){  
        System.out.println(request.getHeader("Cache-Control"));  
        return "test.jsp";  
    }  
}

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和上面区别就在于@ResponseBody

# JSON对象返回

@Controller  
public class UserController {  
  
    @RequestMapping("/save")  
    @ResponseBody  
    public User save(){  
        User user = new User();  
        user.setName("林家君");  
        user.setAge(18);  
        return user;  
    }  
}

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# @ResponseBody

![[Pasted image 20220615164709.png]]

← 请求 RESTful风格案例→