文件上传工具类详解-优快云博客

文件上传状态枚举类：

View Code

package com.hoo.enums;

/**
 * <b>function:</b> 文件上传状态
 * @package com.hoo.enums
 * @fileName UploadState.java
 * @createDate 2010-10-11 下午12:18:14
 * @author hoojo
*/
public enum UploadState {
    UPLOAD_SUCCSSS(0, "上传文件成功！"), 
    UPLOAD_FAILURE(1, "上传文件失败！"), 
    UPLOAD_TYPE_ERROR(2, "上传文件类型错误！"), 
    UPLOAD_OVERSIZE(3, "上传文件过大！"),
    UPLOAD_ZEROSIZE(4, "上传文件为空！"),
    UPLOAD_NOTFOUND(5, "上传文件路径错误！");

private String state;
private int flag;
public String getState() {
return this.state;
    }

public int getFlag() {
return this.flag;
    }
    UploadState(int flag, String state) {
this.state = state;
this.flag = flag;
    }
}

文件上传工具类code：

View Code

package com.hoo.util;

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.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;
import java.util.UUID;
import org.apache.commons.io.FileUtils;
import com.hoo.enums.UploadState;

/***
 * <b>function:</b> 文件上传工具类
 * @author hoojo
 * @createDate Oct 9, 2010 11:12:47 PM
 * @file UploadFileUtils.java
 * @package com.hoo.util
 * @blog http://blog.youkuaiyun.com/IBM_hoojo
 * @email hoojo_@126.com
 * @version 1.0
*/
public abstract class UploadFileUtils {

//上传文件保存路径
    public static String path = "/upload/";
//定义可以上传文件的后缀数组,默认"*"，代表所有
    public static String[] filePostfixs = { "*" };
public static String[] typeImages = { "gif", "jpeg", "png", "jpg", "tif", "bmp" };
public static String[] typeOthers = { "html", "htm", "doc", "xls", "txt", "zip", "rar", "pdf", "cll" };

//上传文件的最大长度
    public static long maxFileSize = 1024 * 1024 * 1024 * 2L;//2G
//一次读取多少字节
    public static int bufferSize = 1024 * 8;

private final static void init() {
if (bufferSize > Integer.MAX_VALUE) {
            bufferSize = 1024 * 8;
        } else if (bufferSize < 8) {
            bufferSize = 8;
        }
if (maxFileSize < 1) {
            maxFileSize = 1024 * 1024 * 1024 * 2L;
        } else if (maxFileSize > Long.MAX_VALUE) {
            maxFileSize = 1024 * 1024 * 1024 * 2L;
        }
    }

/**
     * <b>function:</b>通过输入流参数上传文件
     * @author hoojo
     * @createDate Oct 9, 2010 11:22:47 PM
     * @param uploadFileName 文件名称
     * @param savePath 保存路径
     * @param InputStream 上传的文件的输入流
     * @return 是否上传成功
     * @throws Exception
*/
public static UploadState upload4Stream(String fileName, String path, InputStream is) throws Exception {
        init();
        UploadState state = UploadState.UPLOAD_FAILURE;
        FileOutputStream fos = null;

try {
            path = getDoPath(path);
            mkDir(path);
            fos = new FileOutputStream(path + fileName);   

byte[] buffer = new byte[bufferSize];   
int len = 0;   
while ((len = is.read(buffer)) > 0) {   
                fos.write(buffer, 0, len);   
            }
            state = UploadState.UPLOAD_SUCCSSS;
        } catch (FileNotFoundException e) {   
            state = UploadState.UPLOAD_NOTFOUND;
throw e;
        } catch (IOException e) {   
            state = UploadState.UPLOAD_FAILURE;
throw e; 
        } finally {
if (is != null) {
                is.close();
            }
if (fos != null) {
                fos.flush();
                fos.close();
            }
        }
return state;   
    }   

/**
     * <b>function:</b>上传文件
     * @author hoojo
     * @createDate Oct 9, 2010 11:33:27 PM
     * @param uploadFileName 文件名称
     * @param savePath 保存路径
     * @param uploadFile 上传的文件
     * @return 是否上传成功
     * @throws Exception
*/
public static UploadState upload4Stream(String fileName, String path, File file) throws Exception {
        init();
        UploadState state = UploadState.UPLOAD_FAILURE;
        FileInputStream fis = null;
try {
long size = file.length();
if (size <= 0) {
                state = UploadState.UPLOAD_ZEROSIZE;
            } else {
if (size <= maxFileSize) {
                    fis = new FileInputStream(file); 
                    state = upload4Stream(fileName, path, fis);
                } else {
                    state = UploadState.UPLOAD_OVERSIZE;
                }
            }
        } catch (FileNotFoundException e) {   
            state = UploadState.UPLOAD_NOTFOUND;
throw e;
        } catch (IOException e) {   
            state = UploadState.UPLOAD_FAILURE;
throw e; 
        } finally {
if (fis != null) {
                fis.close();
            }
        }
return state;   
    }   

/**
     * <b>function:</b>通过数组进行验证文件类型上传
     * @author hoojo
     * @createDate Oct 10, 2010 3:39:34 PM
     * @param fileName 文件名称
     * @param path 文件路径
     * @param file 文件
     * @param allowTypes 文件后缀、类型数组
     * @return 返回是否上传成功
     * @throws Exception
*/
public static UploadState upload4Stream(String fileName, String path, File file, String[] allowTypes) throws Exception {
        UploadState state = UploadState.UPLOAD_FAILURE;
if (validTypeByName(fileName, allowTypes)) {
            state = upload4Stream(fileName, path, file);
        } else {
            state = UploadState.UPLOAD_TYPE_ERROR;
        }
return state; 
    }

/**
     * <b>function:</b>通过数组进行验证文件类型上传
     * @author hoojo
     * @createDate Oct 10, 2010 3:43:30 PM
     * @param fileName 文件名称
     * @param path 文件路径
     * @param InputStream 文件输入流
     * @param allowTypes 文件后缀、类型数组
     * @return 返回是否上传成功
     * @throws Exception
*/
public static UploadState upload4Stream(String fileName, String path, InputStream fs, String[] allowTypes) throws Exception {
        UploadState state = UploadState.UPLOAD_FAILURE;
if (validTypeByName(fileName, allowTypes)) {
            state = upload4Stream(fileName, path, fs);
        } else {
            state = UploadState.UPLOAD_TYPE_ERROR;
        }
return state; 
    }

/**
     * <b>function:</b> 利用FileUtils上传文件；其中maxFileSize是限制上传文件的大小
     * @author hoojo
     * @createDate Oct 9, 2010 11:49:15 PM
     * @param fileName 文件名称
     * @param path 保存路径
     * @param file 文件
     * @return 是否上传成功
     * @throws Exception
*/
public static boolean upload4CopyFile(String fileName, String path, File file) throws Exception {
        init();
boolean success = false;
if (file.length() <= maxFileSize) {
            path = getDoPath(path);
            mkDir(path);
            File destFile = new File(path, fileName);
            FileUtils.copyFile(file, destFile);
            success = true;
        } 
return success;   
    }  

/**
     * <b>function:</b>上传指定文件类型的文件
     * @author hoojo
     * @createDate Oct 10, 2010 12:30:09 PM
     * @param fileName 文件名
     * @param path 路径
     * @param file 文件
     * @param allowTypes 类型、后缀数组
     * @return 成功上传的文件名
     * @throws Exception
*/
public static boolean upload4CopyFile(String fileName, String path, File file, String[] allowTypes) throws Exception {   
boolean success = false;
if (validTypeByName(fileName, allowTypes)) {
            success = upload4CopyFile(fileName, path, file);
        }
return success;   
    }

/**
     * <b>function:</b> 根据文件名和类型数组验证文件类型是否合法，flag是否忽略大小写
     * @author hoojo
     * @createDate Oct 10, 2010 11:54:54 AM
     * @param fileName 文件名
     * @param allowTypes 类型数组
     * @param flag 是否获得大小写
     * @return 是否验证通过
*/
public static boolean validTypeByName(String fileName, String[] allowTypes, boolean flag) {
        String suffix = getType(fileName);
boolean valid = false;
if (allowTypes.length > 0 && "*".equals(allowTypes[0])) {
            valid = true;
        } else {
for (String type : allowTypes) {
if (flag) {//不区分大小写后缀
                    if (suffix != null && suffix.equalsIgnoreCase(type)) {
                        valid = true;
break;
                    }
                } else {//严格区分大小写
                    if (suffix != null && suffix.equals(type)) {
                        valid = true;
break;
                    }
                }
            }
        }
return valid;
    }

/**
     * <b>function:</b>根据文件名称和类型数组验证文件类型是否合法
     * @author hoojo
     * @createDate Oct 10, 2010 10:27:17 AM
     * @param fileName 文件名
     * @param allowTypes 文件类型数组
     * @return 是否合法
*/
public static boolean validTypeByName(String fileName, String[] allowTypes) {
return validTypeByName(fileName, allowTypes, true);
    }

/**
     * <b>function:</b> 根据后缀和类型数组验证文件类型是否合法，flag是否区分后缀大小写，true严格大小写
     * @author hoojo
     * @createDate Oct 10, 2010 12:00:10 PM
     * @param suffix 后缀名
     * @param allowTypes 文件类型数组
     * @param flag 是否区分大小写
     * @return 是否合法
*/
public static boolean validTypeByPostfix(String suffix, String[] allowTypes, boolean flag) {
boolean valid = false;
if (allowTypes.length > 0 && "*".equals(allowTypes[0])) {
            valid = true;
        } else {
for (String type : allowTypes) {
if (flag) {//不区分大小写后缀
                    if (suffix != null && suffix.equalsIgnoreCase(type)) {
                        valid = true;
break;
                    }
                } else {//严格区分大小写
                    if (suffix != null && suffix.equals(type)) {
                        valid = true;
break;
                    }
                }
            }
        }
return valid;
    }

/**
     * <b>function:</b>根据文件后缀名和类型数组，验证文件类型是否合法
     * @author hoojo
     * @createDate Oct 10, 2010 10:25:32 AM
     * @param suffix 后缀名
     * @param allowTypes 类型数组
     * @return 是否合法
*/
public static boolean validTypeByPostfix(String suffix, String[] allowTypes) {
return validTypeByPostfix(suffix, allowTypes, true);
    }

/**
     * <b>function:</b>验证当前后缀、文件类型是否是图片类型
     * typeImages 可以设置图片类型
     * @author hoojo
     * @createDate Oct 10, 2010 12:17:18 PM
     * @param suffix 验证文件的后缀
     * @return 是否合法
*/
public static boolean validTypeByPostfix4Images(String suffix) {
return validTypeByPostfix(suffix, typeImages);
    }

/**
     * <b>function:</b>验证当前后缀、文件类型是否是非图片类型（常用办公文件类型）
     * typeOthers 可以设置文件类型
     * @author hoojo
     * @createDate Oct 10, 2010 12:18:18 PM
     * @param suffix 验证文件的后缀
     * @return 是否合法
*/
public static boolean validTypeByPostfix4Others(String suffix) {
return validTypeByPostfix(suffix, typeOthers);
    }

/**
     * <b>function:</b>验证当前文件名、文件类型是否是图片类型
     * typeImages 可以设置图片类型
     * @author hoojo
     * @createDate Oct 10, 2010 12:19:18 PM
     * @param fileName 验证文件的名称
     * @return 是否合法
*/
public static boolean validTypeByName4Images(String fileName) {
return validTypeByName(fileName, typeImages);
    }

/**
     * <b>function:</b>验证当前文件名称、文件类型是否是非图片类型（常用办公文件类型）
     * typeOthers 可以设置文件类型
     * @author hoojo
     * @createDate Oct 10, 2010 12:21:22 PM
     * @param fileName 验证文件的名称
     * @return 是否合法
*/
public static boolean validTypeByName4Others(String fileName) {
return validTypeByName(fileName, typeOthers);
    }

/**
     * <b>function:</b>传递一个路径和文件名称，删除该文件
     * @author hoojo
     * @createDate Oct 10, 2010 10:47:57 AM
     * @param fileName 文件名称
     * @param path 路径
     * @return 是否删除成功
*/
public static boolean removeFile(String fileName, String path) {
boolean flag = false;
if (isFileExist(fileName, path)) {
            File file = new File(getDoPath(path) + fileName);
            flag = file.delete();
        }
return flag;
    }

/**
     * <b>function:</b>删除当前文件
     * @author hoojo
     * @createDate Oct 10, 2010 10:49:54 AM
     * @param file 要删除的文件
     * @return 是否删除成功
*/
public static boolean removeFile(File file) {
boolean flag = false;
if (file != null && file.exists()) {
            flag = file.delete();
        }
return flag;
    }

/**
     * <b>function:</b>删除某个文件
     * @author hoojo
     * @createDate Oct 12, 2010 9:33:06 PM
     * @param path 传递该文件路径
     * @return 删除是否成功
*/
public static boolean removeFile(String path) {
return removeFile(new File(path));
    }

/**
     * <b>function:</b>删除当前文件下面所有文件
     * @author hoojo
     * @createDate Oct 12, 2010 9:27:33 PM
     * @param file File 要删除的文件夹下面文件的文件对象
     * @return 是否删除成功，如果有一个文件删除失败，将返回false
*/
public static boolean removeFile4Dir(File file) {
boolean flag = false;
if (file != null && file.exists() && file.isDirectory()) {
            File[] allFile = file.listFiles();
for (File f : allFile) {
                flag = f.delete();
if (!flag) {
                    System.err.println("删除文件" + f.getAbsolutePath() + "出错了！");
break;
                }
            }
        }
return flag;
    }

/**
     * <b>function:</b>删除当前目录下所有文件
     * @author hoojo
     * @createDate Oct 12, 2010 9:34:41 PM
     * @param path 目录、路径
     * @return 是否成功
*/
public static boolean removeFile4Dir(String path) {
return removeFile4Dir(new File(path));
    }

/**
     * <b>function:</b>删除某个文件夹下的所有文件（除目录），包含子文件夹的文件
     * @author hoojo
     * @createDate Oct 12, 2010 9:30:01 PM
     * @param file 即将删除文件夹对象
     * @return 是否删除成功
*/
public static boolean removeAllFile4Dir(File file) {
boolean flag = false;
if (file != null && file.exists() && file.isDirectory()) {
            File[] allFile = file.listFiles();
for (File f : allFile) {
if (!f.isDirectory()) {
                    flag = f.delete();
                } else {
                    flag = removeAllFile4Dir(f);
                }
if (!flag) {
                    System.err.println("删除文件" + f.getAbsolutePath() + "出错了！");
break;
                }
            }
        }
return flag;
    }

/**
     * <b>function:</b>删除某个目录下所有文件（不包含文件夹，包含文件夹下的文件）
     * @author hoojo
     * @createDate Oct 12, 2010 9:36:17 PM
     * @param path
     * @return
*/
public static boolean removeAllFile4Dir(String path) {
return removeAllFile4Dir(new File(path));
    }

/**
     * <b>function:</b> 传入一个文件名，得到这个文件名称的后缀
     * @author hoojo
     * @createDate Oct 9, 2010 11:30:46 PM
     * @param fileName 文件名
     * @return 后缀名
*/
public static String getSuffix(String fileName) {
int index = fileName.lastIndexOf(".");
if (index != -1) {
             String suffix = fileName.substring(index);//后缀
             return suffix; 
         } else {
return null;
         }
    }

/**
     * <b>function:</b>和文件后缀一样，不同的是没有“.”
     * @author hoojo
     * @createDate Oct 10, 2010 2:42:43 PM
     * @param fileName 文件名称
     * @return
*/
public static String getType(String fileName) {
int index = fileName.lastIndexOf(".");
if (index != -1) {
            String suffix = fileName.substring(index + 1);//后缀
            return suffix; 
        } else {
return null;
        }
   }

/**
     * <b>function:</b> 传递一个文件名称和一个新名称，组合成一个新的带后缀文件名
     * 当传递的文件名没有后缀，会添加默认的后缀
     * @author hoojo
     * @createDate Oct 9, 2010 10:53:06 PM
     * @param fileName 文件名称
     * @param newName 新文件名称
     * @param nullSuffix 为没有后缀的文件所添加的后缀;eg:txt
     * @return String 文件名称
*/
public static String getNewFileName(String fileName, String newName, String nullSuffix) {
        String suffix = getSuffix(fileName);
if (suffix != null) {
            newName += suffix; 
        } else {
            newName = newName.concat(".").concat(nullSuffix);
        }
return newName;   
    } 

/**
     * <b>function:</b> 利用uuid产生一个随机的name
     * @author hoojo
     * @createDate Oct 9, 2010 10:45:27 PM
     * @param fileName 带后缀的文件名称
     * @return String 随机生成的name
*/
public static String getRandomName(String fileName) {
        String randomName = UUID.randomUUID().toString();
return getNewFileName(fileName, randomName, "txt");
    } 

/**
     * <b>function:</b> 用当前日期、时间和1000以内的随机数组合成的文件名称
     * @author hoojo
     * @createDate Oct 9, 2010 11:01:47 PM
     * @param fileName 文件名称
     * @return 新文件名称
*/
public static String getNumberName(String fileName) {
        SimpleDateFormat format = new SimpleDateFormat("yyMMddhhmmss");
int rand = new Random().nextInt(1000);
        String numberName = format.format(new Date()) + rand;
return getNewFileName(fileName, numberName, "txt");
    }

/**
     * <b>function:</b>判断该文件是否存在
     * @author hoojo
     * @createDate Oct 10, 2010 12:00:44 AM
     * @param fileName 文件名称
     * @param path 目录
     * @return 是否存在
*/
public static boolean isFileExist(String fileName, String path) {
        File file = new File(getDoPath(path) + fileName);
return file.exists();
    }

/**
     * <b>function:</b>返回可用的文件名
     * @author hoojo
     * @createDate Oct 10, 2010 1:02:45 AM
     * @param fileName 文件名
     * @param path 路径
     * @return 可用文件名
*/
public static String getBracketFileName(String fileName, String path) {
return getBracketFileName(fileName, fileName, path, 1);
    }


/**
     * <b>function:</b>递归处理文件名称，直到名称不重复（对文件名、目录文件夹都可用）
     * eg: a.txt --> a(1).txt
     * 文件夹upload--> 文件夹upload(1)
     * @author hoojo
     * @createDate Oct 10, 2010 12:56:27 AM
     * @param fileName 文件名称
     * @param path 文件路径
     * @param num 累加数字，种子
     * @return 返回没有重复的名称
*/
public static String getBracketFileName(String fileName, String bracketName, String path, int num) {
boolean exist = isFileExist(bracketName, path);
if (exist) {
int index = fileName.lastIndexOf(".");
            String suffix = "";
            bracketName = fileName;
if (index != -1) {
                suffix = fileName.substring(index);
                bracketName = fileName.substring(0, index);
            }
            bracketName += "(" + num + ")" + suffix;
            num++;
            bracketName = getBracketFileName(fileName, bracketName, path, num);
        } 
return bracketName;
    }

/**
     * <b>function:</b>处理后的系统文件路径
     * @author hoojo
     * @createDate Oct 10, 2010 12:49:31 AM
     * @param path 文件路径
     * @return 返回处理后的路径
*/
public static String getDoPath(String path) {
        path = path.replace("\\", "/");
        String lastChar = path.substring(path.length() - 1);
if (!"/".equals(lastChar)) {
            path += "/";
        }
return path;
    }

/**
     * <b>function:</b> 创建指定的path路径目录
     * @author hoojo
     * @createDate Oct 9, 2010 11:03:49 PM
     * @param path 目录、路径
     * @return 是否创建成功
     * @throws Exception
*/
public static boolean mkDir(String path) throws Exception {   
        File file = null;   
try {   
            file = new File(path);   
if (!file.exists()) {   
return file.mkdirs();   
            }   
        } catch (RuntimeException e) {   
throw e;
        } finally {   
            file = null;   
        }   
return false;   
    }   

/**
     * 创建缩略图
     * @param file 上传的文件流
     * @param height 最小的尺寸
     * @throws IOException
*/
/*public static void writeBrevityPic(File file, float width, float height) throws IOException {
        Image src = javax.imageio.ImageIO.read(file); // 构造Image对象
        int old_w = src.getWidth(null); // 得到源图宽
        int old_h = src.getHeight(null);
        int new_w = 0;
        int new_h = 0; // 得到源图长
        float tempdouble;
        if (old_w >= old_h) {
            tempdouble = old_w / width;
        } else {
            tempdouble = old_h / height;
        }

        if (old_w >= width || old_h >= height) { // 如果文件小于锁略图的尺寸则复制即可
            new_w = Math.round(old_w / tempdouble);
            new_h = Math.round(old_h / tempdouble);// 计算新图长宽
            while (new_w > width && new_h > height) {
                if (new_w > width) {
                    tempdouble = new_w / width;
                    new_w = Math.round(new_w / tempdouble);
                    new_h = Math.round(new_h / tempdouble);
                }
                if (new_h > height) {
                    tempdouble = new_h / height;
                    new_w = Math.round(new_w / tempdouble);
                    new_h = Math.round(new_h / tempdouble);
                }
            }
            BufferedImage tag = new BufferedImage(new_w, new_h, BufferedImage.TYPE_INT_RGB);
            tag.getGraphics().drawImage(src, 0, 0, new_w, new_h, null); // 绘制缩小后的图
            FileOutputStream newimage = new FileOutputStream(file); // 输出到文件流
            JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(newimage);
            JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(tag);
            param.setQuality((float) (100 / 100.0), true);// 设置图片质量,100最大,默认70
            encoder.encode(tag, param);
            encoder.encode(tag); // 将JPEG编码
            newimage.close();
        }
    }*/

public static void main(String[] args) throws Exception {
        String path = "F:/Example Exercise/ExtJS/MultiUpload/WebRoot/upload";
//System.out.println(mkDir(path));
        System.out.println(getDoPath(path));
        System.out.println(getBracketFileName("a.txt", getDoPath(path)));
        System.out.println(getNumberName("a.jpg"));
        System.out.println(getNumberName("a.jpg"));
        System.out.println(getNewFileName("a", "bbb", "txt"));
        System.out.println(getRandomName("a.htm"));
        System.out.println(getSuffix("a.jpg"));
        System.out.println(getType("a.jpg"));
//List<File> list = getFiles(path);
//List<File> list = getFiles(path, "xml");
//List<File> list = getFiles(path, typeImages);
//List<File> list = getFiles(path, typeOthers);
//List<File> list = getFiles(path, typeImages, false);
        /*List<File> list = getFiles(path, "GIF", true);
        for (File f : list) {
            System.out.println("Name:" + f.getName());
            System.out.println(f.getAbsolutePath() + "#" + f.getPath());
        }*/
        System.out.println(removeFile("a.txt", path));
        System.out.println("#############################################");
        System.out.println("###" + validTypeByName("a", new String[]{"*"}));
        System.out.println("###" + validTypeByName("a.JPG", typeImages));
        System.out.println("###" + validTypeByName("a.JPG", typeImages, false));
        System.out.println(validTypeByPostfix("cals", new String[]{"*", "b"}));
        System.out.println(validTypeByPostfix("b", new String[]{"cal", "B"}, false));
    }
}