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  • @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)
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  • 原文地址:https://www.cnblogs.com/jpfss/p/11447788.html
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