fileutil.java

本程序是作者开发的一个宽带娱乐系统的一个模块.

package com.singnet.util;

import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.upload.FormFile;

public class FileUtil {
    public FileUtil() {
    }
    private String allowext="";//允许的格式
    private int allowsize=0;//允许的大小
    private String filepath="";//上传到的目录
    public void setAllowext(String allowext)
    {
        this.allowext=allowext;
    }
    public void setAllowsize(int allowsize)
    {
        this.allowsize=allowsize;
    }
    public  String getAllowext()
    {
        return allowext;
    }
    public int getAllowsize()
    {
        return allowsize;
    }
    /**
     * 创建目录
     * @return boolean
     */
    public static boolean MakeDir(String dirpath) {
        boolean returnValue = false;
        java.io.File myFilePath = new java.io.File(dirpath);
        if (!myFilePath.exists()) {
            myFilePath.mkdir();
            returnValue = true;
        }
        return returnValue;
    }

    /**
     * 创建文件
     * @param filepath String
     * @return boolean
     */
    public static boolean CreateFile(String filepath) {
        boolean returnValue = false;
        try {
            java.io.File myFilePath = new java.io.File(filepath);
            if (!myFilePath.exists()) {
                myFilePath.createNewFile();
                returnValue = true;
            }

        } catch (Exception e) {
            returnValue = false;
            e.printStackTrace();

        }
        return returnValue;
    }

    /**
     * 获取文件格式
     *
     */

    public static String getFileext(String filename) {
        return filename.substring(filename.lastIndexOf("."));
    }

    /**
     * 判断格式是否允许
     *
     */

    public static boolean checkFileext(String allowext, String fileext) {
        boolean re=false;
    	if (allowext.indexOf(fileext) >=0) {
            re=true;
        }
        return re;
    }

    /**
     *上传文件程序，还没有完善
     */
    public static boolean doUpload(FormFile file, HttpServletRequest request,
                                   HttpServletResponse response, String dir,String filename) {
        try {
            InputStream stream = file.getInputStream(); //把文件读入
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            OutputStream bos = new FileOutputStream(dir + filename);
            int bytesRead = 0;
            byte[] buffer = new byte[8192];
            while ((bytesRead = stream.read(buffer, 0, 8192)) != -1) {
                bos.write(buffer, 0, bytesRead); //将文件写入服务器
            }
            bos.close();
            stream.close();
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
	public String getFilepath() {
		return filepath;
	}
	public void setFilepath(String filepath) {
		this.filepath = filepath;
	}
}