多文件上傳與攔截器
阿新 • • 發佈：2017-09-04
quest 配置文件 mon index.jsp except for can ring servle
@Controller
public class MostFileController { //多文件上傳
@RequestMapping("/first")
public String doFlrat(@RequestParam MultipartFile[] upload, HttpSession session) {
System.out.println("*******************");
for (MultipartFile item:upload) {
if(item.getSize()>0){
//用戶是否選擇了文件
@RequestMapping("/first2")
public String doFirst2(MultipartFile upload,HttpSession session){
System.out.println("****************************88");
if(upload.getSize()>0){
//用戶是否選擇了文件
//獲取到用戶上傳的文件名稱
String chilPath=upload.getOriginalFilename(); //文件短名稱
if(chilPath.endsWith(".jpg")||chilPath.endsWith("gif")||chilPath.endsWith("png")){
//將相對路徑轉化成絕對路徑
String paratPath=session.getServletContext().getRealPath("/uplode");
//將file寫入指定的路徑
File filePath=new File(paratPath,chilPath);
try {
//將文件內存運輸到指定的文件中
upload.transferTo(filePath);
} catch (IOException e) {
e.printStackTrace();
return "/index.jsp";
}
}else {
return "/Fileuplode.jsp";
}
}else {
return "/Fileuplode.jsp";
}
return "/Fileuplode.jsp";
}
}
MostFileupdlo.xml配置：
<!--配置包掃描器-->
<context:component-scan base-package="cn.mostFileupload"></context:component-scan>
<!--配置文件上傳的專用類-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding" value="utf-8"></property>
<property name="maxUploadSize" value="5000000"></property>
</bean>
<mvc:annotation-driven/>
Fileuplode.jsp頁面：
</head>
<body>
<h1>文件上傳</h1>
<form action="/first" method="post" enctype="multipart/form-data">
文件1 <input type="file" name="upload"/>
文件2 <input type="file" name="upload"/>
文件3 <input type="file" name="upload"/>
<input type="submit"/>
</form>
</body>
Struts2攔截器： exception 異常攔截器
params 參數攔截器
il8n 國際化攔截器
fileupload 文件上傳攔截器
validation 校驗攔截器
Struts2中處理的請求的組件是：Action
SpringMVC中處理請求的組件是：Controller
JSP中處理請求的組件是： servlet
攔截器HandlerInterceptor的三種方法：（1）perHandle() (2)postHandle() (3)afterCompletion()
註冊攔截器： **匹配0或者更多的目錄
*匹配0或者任意的字符串
攔截器：
創建Myhanderinter類並集成HandlerInterceptor接口中的方法：
public class Myhanderinter implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
System.out.println("perHandle+=========================================");
return true;
}
@Override
public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
System.out.println("posthandle-------------------------------------");
}
@Override
public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
System.out.println("afterHandle====================================");
}
}
//在創建一個intercfeption類
@Controller
public class intercfeption {
@RequestMapping("/first")
public String doInter(){
System.out.println("Handle=====================================");
return "index.jsp";
}
}
HandleInter.xml配置：
<!--配置包掃描器-->
<context:component-scan base-package="cn.Handerinter"></context:component-scan>
<!--註冊攔截器-->
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**"/>
<bean class="cn.Handerinter.Myhanderinter"></bean>
</mvc:interceptor>
</mvc:interceptors>
<mvc:annotation-driven/>多文件上傳與攔截器