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) {
}
}