@RequestMapping 用法详解

@RequestMapping

RequestMapping是一个用来处理请求地址映射的注解,可用于类或方法上。用于类上,表示类中的所有响应请求的方法都是以该地址作为父路径。

RequestMapping注解有六个属性,下面我们把她分成三类进行说明。

value, method

value:     指定请求的实际地址,指定的地址可以是URI Template 模式(后面将会说明);

method:  指定请求的method类型, GET、POST、PUT、DELETE等;

consumes,produces

consumes: 指定处理请求的提交内容类型(Content-Type),例如application/json, text/html;

produces:    指定返回的内容类型,仅当request请求头中的(Accept)类型中包含该指定类型才返回;

params,headers

params: 指定request中必须包含某些参数值是,才让该方法处理。

headers: 指定request中必须包含某些指定的header值,才能让该方法处理请求。

示例:

value  / method 示例

默认RequestMapping("....str...")即为value的值;

复制代码
@Controller  
@RequestMapping("/appointments")  
public class AppointmentsController {  
</span><span style="color: #0000ff;">private</span><span style="color: #000000;"> AppointmentBook appointmentBook;  
  
@Autowired  
</span><span style="color: #0000ff;">public</span><span style="color: #000000;"> AppointmentsController(AppointmentBook appointmentBook) {  
    </span><span style="color: #0000ff;">this</span>.appointmentBook =<span style="color: #000000;"> appointmentBook;  
}  

@RequestMapping(method </span>=<span style="color: #000000;"> RequestMethod.GET)  
</span><span style="color: #0000ff;">public</span> Map&lt;String, Appointment&gt;<span style="color: #000000;"> get() {  
    </span><span style="color: #0000ff;">return</span><span style="color: #000000;"> appointmentBook.getAppointmentsForToday();  
}  

@RequestMapping(value</span>="/{day}", method =<span style="color: #000000;"> RequestMethod.GET)  
</span><span style="color: #0000ff;">public</span> Map&lt;String, Appointment&gt; getForDay(@PathVariable @DateTimeFormat(iso=<span style="color: #000000;">ISO.DATE) Date day, Model model) {  
    </span><span style="color: #0000ff;">return</span><span style="color: #000000;"> appointmentBook.getAppointmentsForDay(day);  
}  

@RequestMapping(value</span>="/new", method =<span style="color: #000000;"> RequestMethod.GET)  
</span><span style="color: #0000ff;">public</span><span style="color: #000000;"> AppointmentForm getNewForm() {  
    </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">new</span><span style="color: #000000;"> AppointmentForm();  
}  

@RequestMapping(method </span>=<span style="color: #000000;"> RequestMethod.POST)  
</span><span style="color: #0000ff;">public</span><span style="color: #000000;"> String add(@Valid AppointmentForm appointment, BindingResult result) {  
    </span><span style="color: #0000ff;">if</span><span style="color: #000000;"> (result.hasErrors()) {  
        </span><span style="color: #0000ff;">return</span> "appointments/new"<span style="color: #000000;">;  
    }  
    appointmentBook.addAppointment(appointment);  
    </span><span style="color: #0000ff;">return</span> "redirect:/appointments"<span style="color: #000000;">;  
}  

}

复制代码

 

value的uri值为以下三类:

A) 可以指定为普通的具体值;

B)  可以指定为含有某变量的一类值(URI Template Patterns with Path Variables);

C) 可以指定为含正则表达式的一类值( URI Template Patterns with Regular Expressions);

example B)

@RequestMapping(value="/owners/{ownerId}", method=RequestMethod.GET)  
public String findOwner(@PathVariable String ownerId, Model model) {  
  Owner owner = ownerService.findOwner(ownerId);    
  model.addAttribute("owner", owner);    
  return "displayOwner";   
}  
原文地址:https://www.cnblogs.com/kuoAT/p/7121753.html example C)
posted @ 2019-09-02 17:31  星朝  阅读(4565)  评论(0编辑  收藏  举报