1、概述

 

2、文件上传

 

 

 

 

 

 

 

 

 

 

 

singleUpload.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%>
    
      
     
        
      
         
       
         
       
      
     
    

struts.xml

 
    
             
     
                  
      
       /singleSuccess.jsp
                  
     
    

UploadAction:

package com.ljb.web.upload;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import org.apache.commons.io.IOUtils;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;public class UploadAction extends ActionSupport { private File upload; private String uploadContentType; private String uploadFileName;   public File getUpload() {  return upload; } public void setUpload(File upload) {  this.upload = upload; } public String getUploadContentType() {  return uploadContentType; } public void setUploadContentType(String uploadContentType) {  this.uploadContentType = uploadContentType; } public String getUploadFileName() {  return uploadFileName; } public void setUploadFileName(String uploadFileName) {  this.uploadFileName = uploadFileName; } public String doUpload () throws IOException {  System.out.println(upload);  System.out.println(uploadContentType);  System.out.println(uploadFileName);  // 获取保存文件路径  String savePath = ServletActionContext.getServletContext().getRealPath("/upload/" + this.uploadFileName);  System.out.println(savePath);    FileInputStream fis = new FileInputStream(upload);  FileOutputStream fos = new FileOutputStream(savePath);  IOUtils.copy(fis, fos);    fos.flush();  fos.close();  fis.close();    return SUCCESS; }}

singleSuccess.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><%@ taglib uri="/struts-tags" prefix="s" %><% String contextPath = request.getContextPath()+"/";%>
    
      文件上传成功! 
     
      <%=contextPath %>upload/
      " />
     
    

 小结：

 

 3、限制文件上传大小

 

 第一种方式：（在struts中配置常量限制文件上传大小，默认2M）

第二种方式：设置拦截器参数

 

 

4、上传多个文件

 

 

 

 样例：

multieFileUpload.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%> 
    
      
      
     
        function addFile () {   var btn = document.getElementById("btn");      var newChild = document.createElement("input");   newChild.setAttribute("type", "file");   newChild.setAttribute("name", "upload");      btn.parentNode.appendChild(newChild);   btn.parentNode.appendChild(document.createElement("br"));  }  
      
         
       
          
        
           
         
          
 
         
        
       
      
     
    

struts.xml

 
    
             
     
                  
      
       /singleSuccess.jsp
                  
      
       /error.jsp                
       
                    
        
         /multiSuccess.jsp
                    
       
      
     
    

 mutipleFileUploadUsingListAction

package com.ljb.web.upload;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.util.List;import org.apache.commons.io.IOUtils;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;public class MutipleFileUploadUsingListAction extends ActionSupport { private List
    
      upload; private List
     
       uploadContentType; private List
      
        uploadFileName;  public String doUpload () throws IOException {  System.out.println(upload.get(0));    for (int i = 0 ; i < upload.size() ; i++) {   String savePath = ServletActionContext.getServletContext().getRealPath("/upload/" + this.uploadFileName.get(i));      FileInputStream fis = new FileInputStream(upload.get(i));   FileOutputStream fos = new FileOutputStream(savePath);   IOUtils.copy(fis, fos);   fos.flush();   fos.close();   fis.close();  }  return SUCCESS; } public List
       
         getUpload() {  return upload; } public void setUpload(List
        
          upload) {  this.upload = upload; } public List
         
           getUploadContentType() {  return uploadContentType; } public void setUploadContentType(List
          
            uploadContentType) {  this.uploadContentType = uploadContentType; } public List
           
             getUploadFileName() {  return uploadFileName; } public void setUploadFileName(List
            
              uploadFileName) {  this.uploadFileName = uploadFileName; }}