springmvc @RequestMapping注解的入门配置教程

原文：springmvc
@RequestMapping注解的入门配置教程

源代码下载地址：http://www.zuidaima.com/share/1837785387207680.htm

直接代码喽。

@Controller
@RequestMapping("/appointments")
public class AppointmentsController {

private final AppointmentBook appointmentBook;

@Autowired
public AppointmentsController(AppointmentBook appointmentBook) {
this.appointmentBook = appointmentBook;
}

@RequestMapping(method = RequestMethod.GET)
public Map<String, Appointment> get() {
return appointmentBook.getAppointmentsForToday();
}

@RequestMapping(value="/{day}", method = RequestMethod.GET)
public Map<String, Appointment> getForDay(@PathVariable @DateTimeFormat(iso=ISO.DATE) Date day, Model model) {
return appointmentBook.getAppointmentsForDay(day);
}

@RequestMapping(value="/new", method = RequestMethod.GET)
public AppointmentForm getNewForm() {
return new AppointmentForm();
}

@RequestMapping(method = RequestMethod.POST)
public String add(@Valid AppointmentForm appointment, BindingResult result) {
if (result.hasErrors()) {
return "appointments/new";
}
appointmentBook.addAppointment(appointment);
return "redirect:/appointments";
}
}

DispatcherServle

<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>

/appointments/new.do

映射方法是getNewForm()

/appointments.do 

GET请求映射方法是 get()

POST请求映射方法是add(@Valid AppointmentForm appointment, BindingResult result)

通过参数条件缩小路径映射

@RequestMapping(value = "/path", params="myParam=myValue")
public void add(){...}

http://localhost:8080/DynamicWebProject/hao/hello.do?myParam=myValue
URL中只有存在myParam=myValue参数时才被允许访问路径映射的方法

 

@RequestMapping(value = "/path", method = RequestMethod.POST, headers="content-type=text/*")
public void add(){...}

只有在URL的头信息中包含有content-type=text/*(content-type=text/xml)的POST请求才能访问add()方法

配合@RequestMapping使用的方法或注解

org.springframework.web.context.request.WebRequest或org.springframework.web.context.request.NativeWebRequest。通用请求参数允许访问 request/session属性，到本机的Servlet / Portlet API的。

java.util.Locale 当前请求的区域设置，由解析器提供最具体的语言环境。

java.io.InputStream /java.io.Reader访问请求的内容。这个值是原始的InputStream /Reader ,由Servlet API公开。

java.io.OutputStream /java.io.Writer生成响应的内容。这个值是原始的OutputStream /Writer，由Servlet API公开。

@ PathVariable注明获取URI模板变量的参数。

@ RequestParam注明为获取特定的servlet请求参数的参数。

@ RequestHeader 访问特定的servlet请求的HTTP头的参数。参数值转换为声明的方法的参数类型。

@ RequestBody 访问HTTP请求体参数。参数值转换为所声明的方法的参数类型使用HttpMessageConverters。

HttpEntity <？>访问servlet请求的HTTP头和内容。请求流将被转换为实体采用HttpMessageConverters。

java.util.Map/ org.springframework.ui.Model /org.springframework.ui.ModelMap为丰富的隐含模型，暴露在Web视图

org.springframework.validation.Errors / org.springframework.validation.BindingResult

org.springframework.web.bind.support.SessionStatus

原文地址：http://www.blogjava.net/wmcoo/articles/333428.html