java上传文件工具类
这个是之前整理之前所学时与使用java向邮箱发送邮件一块找到的，一起贴出来供大家参考：
import java.awt.image.BufferedImage;import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import javax.imageio.ImageIO;
import org.apache.struts.upload.FormFile;
import org.apache.struts.util.MessageResources;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class UploadFile {
/**
* 按照ID和当前时间生成目录
* @param OrderId
* @return
*/
public static String getAbsolutePath(){
String currYear= new SimpleDateFormat("yyyy").format(new Date());
String currMonth= new SimpleDateFormat("MM").format(new Date());
String currDay = new SimpleDateFormat("dd").format(new Date());
String path = new StringBuffer(currYear).append(\'/\').append(currMonth).append(\'/\').append(currDay).append(\'/\').toString();
return path;
}
/**
* 上传课程资料
* @param dir 文件目录
* @param trueName 文件名称
* @param formFile FormFile
* @return String
* @throws Exception
*/
public static String uploadFile(int courseId,String dir,FormFile file,MessageResources message) throws Exception {
String fileName = file.getFileName();
int i = fileName.lastIndexOf(".");
String logoFormat = fileName.substring(i + 1);
int size = file.getFileSize();
// *************限制文件的上传格式和文件大小*******************
String fileFormat = message.getMessage("file.fileFormat"); // 文件格式
int imageSize = Integer.valueOf(message.getMessage("file.fileSize"));// 文件大小
String format = UploadFile.checkFileExt(logoFormat, fileFormat); // 判断文件格式
if (format != null && size <= imageSize) {
fileName = courseId+"_"+String.valueOf(System.currentTimeMillis()) + "." + logoFormat;
File dirPath = new File(dir + "/" + fileName);// 存储位置
mkdirIfNotExists(dirPath);
InputStream streamIn = file.getInputStream(); // 创建读取用户上传文件的对象
File uploadFile = new File(dir); // 创建把上传数据写到目标文件的对象
// 判断指定路径是否存在，不存在则创建路径
if (!uploadFile.exists() || uploadFile == null) {
uploadFile.mkdirs();
}
OutputStream streamOut = new FileOutputStream(dirPath);
int bytesRead = 0;
byte[] buffer = new byte[8192];
while ((bytesRead = streamIn.read(buffer, 0, 8192)) != -1) {
streamOut.write(buffer, 0, bytesRead);
}
streamOut.close();
streamIn.close();
file.destroy();
return fileName;
}else{
return null;
}
}
/**
* 上传文章附件
* @param dir
* @param file
* @param message
* @return
* @throws Exception
*/
public static String uploadFile(String dir,FormFile file,MessageResources message) throws Exception {
String fileName = file.getFileName();
int i = fileName.lastIndexOf(".");
String logoFormat = fileName.substring(i + 1);
int size = file.getFileSize();
// *************限制文件的上传格式和文件大小*******************
String fileFormat = message.getMessage("file.fileFormat"); // 文件格式
int imageSize = Integer.valueOf(message.getMessage("file.fileSize"));// 文件大小
String format = UploadFile.checkFileExt(logoFormat, fileFormat); // 判断文件格式
if (format != null && size <= imageSize) {
fileName = String.valueOf(System.currentTimeMillis()) + "." + logoFormat;
File dirPath = new File(dir + "/" + fileName);// 存储位置
mkdirIfNotExists(dirPath);
InputStream streamIn = file.getInputStream(); // 创建读取用户上传文件的对象
File uploadFile = new File(dir); // 创建把上传数据写到目标文件的对象
// 判断指定路径是否存在，不存在则创建路径
if (!uploadFile.exists() || uploadFile == null) {
uploadFile.mkdirs();
}
OutputStream streamOut = new FileOutputStream(dirPath);
int bytesRead = 0;
byte[] buffer = new byte[8192];
while ((bytesRead = streamIn.read(buffer, 0, 8192)) != -1) {
streamOut.write(buffer, 0, bytesRead);
}
streamOut.close();
streamIn.close();
file.destroy();
return fileName;
}else{
return null;
}
}
public static String uploadFile1(String dir,FormFile file,MessageResources message) throws Exception {
String fileName = file.getFileName();
String s=UUID.randomUUID().toString();
int i = fileName.lastIndexOf(".");
String logoFormat = fileName.substring(i + 1);
int size = file.getFileSize();
// *************限制文件的上传格式和文件大小*******************
String fileFormat = message.getMessage("file.fileFormat"); // 文件格式
int imageSize = Integer.valueOf(message.getMessage("file.fileSize"));// 文件大小
String format = UploadFile.checkFileExt(logoFormat, fileFormat); // 判断文件格式
if (format != null && size <= imageSize) {
fileName = String.valueOf(System.currentTimeMillis()+s) + "." + logoFormat;
File dirPath = new File(dir + "/" + fileName);// 存储位置
mkdirIfNotExists(dirPath);
InputStream streamIn = file.getInputStream(); // 创建读取用户上传文件的对象
File uploadFile = new File(dir); // 创建把上传数据写到目标文件的对象
// 判断指定路径是否存在，不存在则创建路径
if (!uploadFile.exists() || uploadFile == null) {
uploadFile.mkdirs();
}
OutputStream streamOut = new FileOutputStream(dirPath);
int bytesRead = 0;
byte[] buffer = new byte[8192];
while ((bytesRead = streamIn.read(buffer, 0, 8192)) != -1) {
streamOut.write(buffer, 0, bytesRead);
}
streamOut.close();
streamIn.close();
file.destroy();
return fileName;
}else{
return null;
}
}
/**
* @param 文件扩展名
* @param permitFormatsConfig 文件类型
* @return String 文件匹配类型
*/
public static String checkFileExt(String type, String permitFormatsConfig) {
String[] formats = permitFormatsConfig.split(";");
for (int i = 0; i < formats.length; i++) {
if (type.toLowerCase().endsWith(formats[i].toLowerCase())) {
return formats[i];
}
}
return null;
}
public static File mkdirIfNotExists(File file) {
if (file.exists()) {
return file;
}
if (file.isDirectory() && file.mkdirs()) {
return file;
}
File parentDirectory = file.getParentFile();
if (parentDirectory.exists()) {
return file;
} else if (parentDirectory.mkdirs()) {
return file;
}
throw new java.lang.RuntimeException(
"Failed to make some necessary parent directories. Please trying.");
}
/**
* 上传图片，并获得缩小图片
* 图片大小交由显示页面控制 后台将不负责修改图像大小
* @param picDir
* @param file
* @param message
* @param width
* @return
* @throws Exception
*/
public static String uploadFile(String picDir, FormFile file,
MessageResources message, int width,int height) throws Exception {
String fileName = file.getFileName();
int ff = fileName.lastIndexOf(".");
ImageScale imageScale = new ImageScale();
String logoFormat = fileName.substring(ff + 1);
int size = file.getFileSize();
// *************限制文件的上传格式和文件大小*******************
String fileFormat = message.getMessage("file.imageFormat"); // 文件格式
int imageSize = Integer.valueOf(message
.getMessage("file.imageSize"));// 文件大小
String format = UploadFile.checkFileExt(logoFormat, fileFormat); // 判断文件格式
if (format != null && size <= imageSize) {
fileName = String.valueOf(System.currentTimeMillis()) + "." + logoFormat;
File dirPath = new File(picDir + "/" + fileName);
mkdirIfNotExists(dirPath);// 存储位置
InputStream stream = file.getInputStream();
OutputStream bos = new FileOutputStream(dirPath);
BufferedImage Bi = ImageIO.read(file.getInputStream());
bos = new FileOutputStream(dirPath);
//图片大小交由显示页面控制 后台将不负责修改图像大小
/*if (Bi.getWidth() > width || Bi.getHeight() > height) {
Bi = imageScale.imageZoomOut(Bi, width, height);
ImageIO.write(Bi, logoFormat, dirPath);
} else {*/
ImageIO.write(Bi, logoFormat, dirPath);
//}
bos.close();
stream.close();
file.destroy();
return fileName;
} else {
file.destroy();
return null;
}
}
/**
* 上传图片，并获得缩小图片
* @param picDir
* @param file
* @param message
* @param width
* @return
* @throws Exception
*/
public static String uploadFile(String picDir, FormFile file,MessageResources message, int width) throws Exception {
String fileName = file.getFileName();
int ff = fileName.lastIndexOf(".");
ImageScale imageScale = new ImageScale();
String logoFormat = fileName.substring(ff + 1);
int size = file.getFileSize();
// *************限制文件的上传格式和文件大小*******************
String fileFormat = message.getMessage("file.imageFormat"); // 文件格式
int imageSize = Integer.valueOf(message.getMessage("file.imageSize"));// 文件大小
String format = UploadFile.checkFileExt(logoFormat, fileFormat); // 判断文件格式
if (format != null && size <= imageSize) {
fileName = String.valueOf(System.currentTimeMillis()) + "."+ logoFormat;
File dirPath = new File(picDir + "/" + fileName);// 存储位置
mkdirIfNotExists(dirPath);
InputStream stream = file.getInputStream();
OutputStream bos = new FileOutputStream(dirPath);
BufferedImage Bi = ImageIO.read(file.getInputStream());
if (Bi.getWidth() > width || Bi.getHeight() > width) {
Bi = imageScale.imageZoomOut(Bi, width, width);
ImageIO.write(Bi, logoFormat, dirPath);
} else {
ImageIO.write(Bi, logoFormat, dirPath);
}
bos.close();
stream.close();
file.destroy();
dirPath = new File(picDir + "/hoy_" + fileName);
bos = new FileOutputStream(dirPath);
if (Bi.getWidth() > 142 || Bi.getHeight() > 60) {
Bi = imageScale.imageZoomOut(Bi, 142, 60);
ImageIO.write(Bi, logoFormat, dirPath);
} else {
ImageIO.write(Bi, logoFormat, dirPath);
}
bos.close();
stream.close();
file.destroy();
return fileName;
} else {
file.destroy();
return null;
}
}
}
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