SpringMVC--RequestMapping

一、requestmapping映射url

1）requestmapping注解指定控制器能处理哪些url请求，可用于类定义和方法定义处。

2）requestmapping常用属性有value、params、method、headers，表示请求url地址、请求方法、请求参数及请求头。他们之间是与的关系，复合多个条件可让请求映射精确化。

类定义

@requestmapping(value = "/user")
public class usercontroller{
} 

方法定义 映射请求地址：http://127.0.0.1:8080/应用名/user/register

@requestmapping(value = "/register", method = requestmethod.get)
public string register{
}

应用占位符

@requestmapping(value = "/{formname}")
public string loginform(@pathvariable string formname) {
		// 动态跳转页面
		return formname;
}

3）如果类定义处没有设置@requestmapping，则方法处标记的url相对于web 应用的根目录

 

二、获取请求参数

1）requestparam，将指定名称的参数赋值变量。如果是相同名称的变量，可省略注解@requestparam

@requestmapping(value = "/register", method = requestmethod.post)
public string register(@requestparam("loginname") string name1, @requestparam("password") string password,@requestparam("username") string name2) { 
		return "loginform";
	}

2）requestheader，获取报文头参数

@requestmapping(value="/test")
public void requestheadertest(@requestheader("user-agent") string useragent,  
		     @requestheader(value="accept") string[] accepts) {
 
}

3)cookievalue

@requestmapping(value="/cookie")
 public void cookiet(@cookievalue(value="jsessionid", defaultvalue="") string sessionid) {
			
		 }

4)能接受原生请求参数httpservletrequest、httpservletresponse、inputstream、outputstream等

@requestmapping("download.do")
public modelandview download(string docno,httpservletrequest request,
			httpservletresponse response) {
}

5)上传附件

@requestmapping("upload.do")
public void upload(@requestparam(value = "picfile", required = true)multipartfilesoftwarefile,httpservletrequest request) {
		string filename = softwarefile.getoriginalfilename();
		file targetsoftwarefile = new file("d:", filename);
		if (!targetsoftwarefile.exists()) {
			targetsoftwarefile.mkdirs();
		}
		try {
			softwarefile.transferto(targetsoftwarefile);
		} catch (exception e) {  
		} 

}