选择所要上传的文件

upload.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%>    <%@ taglib prefix="s" uri="/struts-tags" %>   <%//引入struts2标签  %>
      
    
        
      
           
   <% // 
        %>    
         
       
    
    
    
      <%//设置form表单的enctype属性为multipart/form-data  %>    
     
            
       
	            
file
	            
         	  
       
				         
	            
         
	            
         
	         
			          
     
  
    

实现文件上传功能

UploadAction.java

import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;import java.io.OutputStream;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;public class UploadAction extends ActionSupport{private File file;      //创建file属性private String fileFileName;   //创建fileFileName属性，代表文件名称private String fileContentType;  //创建fileContentType属性，代表文件类型 public File getFile() {		return file;	}public void setFile(File file) {		this.file = file;	}public String getFileFileName() {		return fileFileName;	}public void setFileFileName(String fileFileName) {		this.fileFileName = fileFileName;	}public String getFileContentType() {		return fileContentType;	}public void setFileContentType(String fileContentType) {		this.fileContentType = fileContentType;	}public String execute() throws Exception{			InputStream is = new FileInputStream(file);		String root = "E:/shang";  //设置上传的路径		File destFile = new File(root, this.getFileFileName()); //destFile文件：输出流的目的文件		OutputStream os = new FileOutputStream(destFile);       //os文件：关于destFile文件的输出流		byte[] buffer = new byte[400];  //buffer字节数组：实现输入流与输出流的转换		int length = 0;		while ((length = is.read(buffer)) > 0)		{			os.write(buffer, 0, length);		}		is.close();		os.close();		return SUCCESS;  }}

 配置struts.xml 文件

        
            
         
         	
              
                  
       
        uploadResult.jsp