Servlet实现文件上传（深度）（二）

package com.shengsiyuan.struts2;
 
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 String username;  //传入的username
 
    private File file;    //以File为类型的file
 
    private String fileFileName;  //小心命名，以file开头FileName固定
 
    private String fileContentType;
 
    public String getUsername()
    {
        return username;
    }
 
    public void setUsername(String username)
    {
        this.username = username;
    }
 
    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;
    }
 
    @Override
    public String execute() throws Exception
    {
        String root = ServletActionContext.getRequest().getRealPath("/upload");//定义上传文件的路径
 
        InputStream is = new FileInputStream(file);
 
        //这里查看上传文件临时路径、以及临时文件的名字，在struts.properties已规定
        System.out.println("path: " + file.getAbsolutePath()); 
        System.out.println("file: " + file.getName());
 
        //这里查看文件的真实名称
        System.out.println("fileFileName: " + fileFileName);
 
        File destFile = new File(root, fileFileName);
 
        OutputStream os = new FileOutputStream(destFile);
 
        byte[] buffer = new byte[400];//定义以400字节的速度上传文件
 
        int length = 0;
 
        while(-1 != (length = is.read(buffer)))
        {
            os.write(buffer, 0, length);
 
           // Thread.sleep(1000);//为了能够查看临时文件存在，定义线程延时1秒
        }
 
        is.close();
        os.close();
 
        return SUCCESS;
 
    }
}