SSH框架中实现文件的上传功能

时间：2022-08-31 15:03:03

1.上传页面代码 upload.jsp

<body>
 <form action="upload.action" method="post" enctype="multipart/form-data" > 
     请选择需要上传的文件：<input type="file" id="dofile" name="file"/><br />
     <input type="submit" id="btnupload" name="btnupload" value="开始上传">
 </form>
  </body>


2.通过struts的控制跳转的action代码，将选择的文件通过流上传到项目目录下的upload文件夹中。

package com.boya.action;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.List;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class uploadAction extends ActionSupport { 

     //上传文件存放路径 
     private final static String UPLOADDIR = "/upload"; 
     //上传文件集合 
     private List<File> file; 
     //上传文件名集合 
     private List<String> fileFileName; 
     //上传文件内容类型集合 
     private List<String> fileContentType; 
     public List<File> getFile() { 
         return file; 
     } 

     public void setFile(List<File> file) { 
         this.file = file; 
     } 

    public List<String> getFileFileName() { 
        return fileFileName; 
    } 

     public void setFileFileName(List<String> fileFileName) { 
         this.fileFileName = fileFileName; 
     } 

     public List<String> getFileContentType() { 
         return fileContentType; 
     } 

     public void setFileContentType(List<String> fileContentType) { 
         this.fileContentType = fileContentType; 
     } 

     public String execute() throws Exception { 
     System.out.println(this.getFileFileName());
         for (int i = 0; i < file.size(); i++) { 
             //循环上传每个文件 
             uploadFile(i); 
         } 
         return "success"; 
     } 

     //执行上传功能 
     private void uploadFile(int i) throws FileNotFoundException, IOException { 
         try { 
             InputStream in = new FileInputStream(file.get(i)); 
             String dir = ServletActionContext.getRequest().getRealPath(UPLOADDIR);
             File fileLocation = new File(dir);
             //此处也可以在应用根目录手动建立目标上传目录
             if(!fileLocation.exists()){
                 boolean isCreated  = fileLocation.mkdir();
                 if(!isCreated) {
                     //目标上传目录创建失败,可做其他处理,例如抛出自定义异常等,一般应该不会出现这种情况。
                     return;
                 }
             }
             String fileName=this.getFileFileName().get(i);
             File uploadFile = new File(dir, fileName); 
             OutputStream out = new FileOutputStream(uploadFile); 
             byte[] buffer = new byte[1024 * 1024]; 
             int length; 
             while ((length = in.read(buffer)) > 0) { 
                 out.write(buffer, 0, length); 
             } 
             in.close(); 
             out.close(); 
         } catch (FileNotFoundException ex) { 
         System.out.println("上传失败!");
             ex.printStackTrace(); 
         } catch (IOException ex) { 
         System.out.println("上传失败!");
             ex.printStackTrace(); 
         } 
     } 
 }
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