java实现文件上传下载和图片压缩代码示例
分享一个在项目中用的到文件上传下载和对图片的压缩，直接从项目中扒出来的：）
复制代码 代码如下:
package com.eabax.plugin.yundada.utils;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.UUID;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import net.coobird.thumbnailator.Thumbnails;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.eabax.plugin.yundada.GaContext;
public class FileUploadDownloadUtil {
private static final Logger log = LoggerFactory.getLogger(FileUploadDownloadUtil.class);
/**
* 上传文件到服务器
* @param request
* @param type
* @return
* @throws Exception
*/
public static String upload(HttpServletRequest request, String type) throws Exception {
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
String saveFileName = null;
if (isMultipart) {
String savePath = request.getSession().getServletContext()
.getRealPath(\"/\")
+ \"/upload/\";
String tempPath = request.getSession().getServletContext()
.getRealPath(\"/\")
+ \"/upload/temp/\";
File saveFile = new File(savePath);
File tempFile = new File(tempPath);
if (!saveFile.isDirectory())
saveFile.mkdirs();
if (!tempFile.isDirectory())
tempFile.mkdirs();
DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setSizeThreshold(1024 * 4);
factory.setRepository(tempFile);
ServletFileUpload uploader = new ServletFileUpload(factory);
uploader.setSizeMax(20 * 1024 * 1024);
List<FileItem> fileItems = uploader.parseRequest(request);
for (FileItem item : fileItems) {
if (item.isFormField()) {
// funName=item.getString();
} else {
// String fileName=item.getName();
// String
// fix=fileName.substring(fileName.lastIndexOf(\".\")+1);
String fix = type;
Date nowDate = new Date();
SimpleDateFormat sdf = new SimpleDateFormat(
\"yyyyMMddhhmmss\");
String fileName = sdf.format(nowDate);
fileName += System.currentTimeMillis();
fileName += \".\" + fix;
saveFileName = \"/upload/\" + fileName;
File file = new File(savePath + fileName);
item.write(file);
}
}
}
return saveFileName;
}
/**
* 上传头像
* @param request
* @param type
* @return
* @throws Exception
*/
public static String uploadHeadShow(HttpServletRequest request,GaContext context, String type) throws Exception {
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
String saveFileName = null;
String imagePath = \"/upload/headshow/\";
String x = request.getParameter(\"length\");
String y = request.getParameter(\"wide\");
if (isMultipart) {
String headShowServicePath = request.getSession().getServletContext()
.getRealPath(\"/\")
+ imagePath;
Date nowDate = new Date();
SimpleDateFormat sdf = new SimpleDateFormat(
\"yyyyMMddhhmmss\");
String fileName = context.getUsername()+sdf.format(nowDate);
File headShowFile = new File(headShowServicePath);
if (!headShowFile.isDirectory())
headShowFile.mkdirs();
DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setSizeThreshold(1024 * 4);
factory.setRepository(headShowFile);
ServletFileUpload uploader = new ServletFileUpload(factory);
uploader.setSizeMax(20 * 1024 * 1024);
List<FileItem> fileItems = uploader.parseRequest(request);
for (FileItem item : fileItems) {
if (item.isFormField()) {
// funName=item.getString();
} else {
String fix = type;
fileName += \".\" + fix;
saveFileName = imagePath + fileName;
File file = new File(headShowServicePath + fileName);
item.write(file);
}
}
//压缩图片
if(x!=null&&!\"\".equals(x) && y!=null&&!\"\".equals(y)) {
saveFileName = thumbnailatorImage(imagePath, fileName, type, Integer.parseInt(x), Integer.parseInt(y));
}
}
return saveFileName;
}
/**
* 上传分享图片
* @param request
* @param type
* @return
* @throws Exception
*/
public static JSONObject uploadArticleImage(HttpServletRequest request,GaContext context, String type) throws Exception {
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
JSONObject saveFileName = new JSONObject();
String imagePath = \"\";
String x = request.getParameter(\"length\");
String y = request.getParameter(\"wide\");
if(\"4\".equals(type)) {
//分享上传图片路径
imagePath = \"/upload/articleimage/\";
}else if(\"5\".equals(type)) {
//链接上传图片路径
imagePath = \"/upload/linkimage/\";
} else {
//头像上传图片路径
imagePath = \"/upload/headshow/\";
}
if (isMultipart) {
String headShowServicePath = request.getSession().getServletContext()
.getRealPath(\"/\")
+ imagePath;
File headShowFile = new File(headShowServicePath);
if (!headShowFile.isDirectory())
headShowFile.mkdirs();
DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setSizeThreshold(1024 * 4);
factory.setRepository(headShowFile);
ServletFileUpload uploader = new ServletFileUpload(factory);
uploader.setSizeMax(20 * 1024 * 1024);
List<FileItem> fileItems = uploader.parseRequest(request);
for (FileItem item : fileItems) {
UUID uuid = UUID.randomUUID();
String fileName = uuid.toString();
if (item.isFormField()) {
// funName=item.getString();
} else {
String fix = type;
fileName += \".\" + fix;
saveFileName.put( uuid.toString(),imagePath + fileName);
File file = new File(headShowServicePath + fileName);
item.write(file);
}
//压缩图片
if(x!=null&&!\"\".equals(x) && y!=null&&!\"\".equals(y)) {
String thumbnailatorName = thumbnailatorImage(imagePath, fileName, type, Integer.parseInt(x), Integer.parseInt(y));
saveFileName.put(\"thumbnailatorImage\", thumbnailatorName);
}
}
}
return saveFileName;
}
/**
* 上传压缩压缩并保存图片
* @param oldSavePath 原文件路径
* @param oldFileName 原文件名称
* @param fix 文件类型
* @param x 需要压缩的宽度
* @param y 需要压缩的长度
* @return
* @throws IOException
*/
public static String thumbnailatorImage(String oldSavePath,String oldFileName,String fix,int x,int y) throws IOException {
//Thumbnail读取并压缩图片
BufferedImage waterMarkBufferedImage = Thumbnails.of(oldSavePath+oldFileName)
//Thumbnail的方法,压缩图片
.size(x, y)
//读取成BufferedImage对象
.asBufferedImage();
//把内存中的图片写入到指定的文件中
String savePath = oldSavePath+x+\"-\"+y+\"/\";
File saveFile = new File(savePath);
if (!saveFile.isDirectory())
saveFile.mkdirs();
DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setSizeThreshold(1024 * 4);
factory.setRepository(saveFile);
ServletFileUpload uploader = new ServletFileUpload(factory);
uploader.setSizeMax(20 * 1024 * 1024);
UUID uuid = UUID.randomUUID();
String fileName = uuid.toString();
fileName += \".\" + fix;
String saveFileName = savePath+fileName;
File fileOutPut = new File(saveFileName);
ImageIO.write(waterMarkBufferedImage, fix, fileOutPut);
return saveFileName;
}
/**
* 下载压缩压缩并保存图片
* @param oldSavePath 原文件路径
* @param oldFileName 原文件名称
* @param fix 文件类型
* @param x 需要压缩的宽度
* @param y 需要压缩的长度
* @return
* @throws IOException
*/
public static String downloadThumbnailatorImage(String servicePath,String uri,int x,int y) throws IOException {
//校验图片是否存在
String uriSubPath = uri.substring(0, uri.lastIndexOf(\"/\")+1);//文件名以前，服务器以后
String fileName = uri.substring(uri.lastIndexOf(\"/\")+1,uri.length());//文件名
String getThumbnailatorPath = servicePath + uriSubPath+x+\"-\"+y+\"/\";
String saveFileName = getThumbnailatorPath+fileName;
File downFilePath = new File(getThumbnailatorPath);//压缩以后的文件夹
File downFile = new File(saveFileName);//压缩以后的文件
if (downFilePath.isDirectory()&&downFile.exists()) {
return saveFileName;
} else {
//Thumbnail读取并压缩图片
log.error(servicePath+uri);
BufferedImage waterMarkBufferedImage = Thumbnails.of(servicePath+uri)
//Thumbnail的方法,压缩图片
.size(x, y)
//读取成BufferedImage对象
.asBufferedImage();
if (!downFilePath.isDirectory()) {
downFilePath.mkdirs();
}
DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setSizeThreshold(1024 * 4);
factory.setRepository(downFilePath);
ServletFileUpload uploader = new ServletFileUpload(factory);
uploader.setSizeMax(20 * 1024 * 1024);
File fileOutPut = new File(saveFileName);
ImageIO.write(waterMarkBufferedImage, \"jpg\", fileOutPut);
}
return saveFileName;
}
}
以上就是本文分享的所有内容了，希望对大家能有所帮助。
本文地址：https://www.stayed.cn/item/3769
转载请注明出处。
本站部分内容来源于网络,如侵犯到您的权益,请 联系我
我的博客
人生若只如初见，何事秋风悲画扇。
我的标签
随笔档案
- 2024-02(2)
- 2023-06(1)
- 2023-05(1)
- 2023-04(14)
- 2023-03(3)
- 2023-01(6)
- 2022-12(5)
- 2022-11(5)
- 2022-07(2)
- 2022-06(4)
- 2022-05(3)
- 2022-03(1)
- 2021-12(6)
- 2021-11(1)
- 2021-10(3)
- 2021-09(5)
- 2021-07(5)
- 2021-02(2)
- 2021-01(7)
- 2020-12(18)
- 2020-11(14)
- 2020-10(12)
- 2020-09(10)
- 2020-08(22)
- 2020-07(2)
- 2020-06(1)
- 2020-04(5)
- 2020-03(9)
- 2020-02(7)
- 2020-01(9)
- 2019-12(8)
- 2019-11(10)
- 2019-10(11)
- 2019-09(17)
- 2019-08(16)
- 2019-07(6)
- 2019-06(3)
- 2019-04(1)
- 2019-03(8)
- 2019-02(5)
- 2019-01(1)
- 2018-11(2)
- 2018-10(3)
- 2018-09(1)
- 2018-08(3)
- 2018-07(3)
- 2018-06(7)
- 2018-04(4)
- 2018-03(5)
- 2018-02(4)
- 2018-01(22)
- 2017-12(3)
- 2017-11(5)
- 2017-10(15)
- 2017-09(26)
- 2017-08(1)
- 2017-07(3)