java解压缩.zip文件

业务调用

	if ("zip".equals(extension)) {
		//压缩文件，返回新图片名称
		List<Map<String, String>> mapList = FileUnZip.unZip(photoPath, realPath, false);
		for (Map<String, String> map : mapList) {
			String newFilename = map.get("newFilename").toString();
			CasePhotos photos = new CasePhotos();
			photos.setId(KeyUtils.get32UUID());
			photos.setCaId(ca1.getId());
			photos.setPhotoId(newFilename);
			photos.setType("1");
			casePhotosService.insertSelective(photos);
		}
	}

FileUnZip工具类

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.util.*;
 
public class FileUnZip {
	static final int BUFFER = 2048;

	/**
	 * zip文件解压
	 * zip文件中多层目录不做处理，全部解压到传入的filePath下
	 * @param unZipfileName
	 *            要解压缩的文件全路径
	 * @param filePath
	 *            文件解压缩到的位置
	 * @return 压缩文件中的文件名和存储文件名
	 * @throws Exception
	 */
	public static List<Map<String, String>> unZip(String unZipfileName,
			String filePath,boolean isYanZheng) throws Exception {
		List<Map<String, String>> result = new ArrayList<Map<String, String>>();
		try {
			ZipFile zipFile = new ZipFile(unZipfileName, "GB2312");
			Enumeration<?> emu = zipFile.getEntries();
			while (emu.hasMoreElements()) {
				ZipEntry entry = (ZipEntry) emu.nextElement();
				// 目录作为一个file读出，判断是目录则跳过。
				if (entry.isDirectory()) {
					continue;
				}
				String filePostfix = entry.getName().substring(
						entry.getName().lastIndexOf(".")).toLowerCase();
//				//判断文件
//				if(fileType != null && !fileType.contains(filePostfix))
//					continue;
				String fileName = entry.getName().substring(entry.getName().lastIndexOf("/")+1);
				String oldFilename = entry.getName().substring(entry.getName().lastIndexOf("/")+1,
						entry.getName().lastIndexOf("."));
				String newFilename = "";
				if(isYanZheng){
					newFilename = oldFilename;//验证时文件名不重新生成
				}else{
					newFilename = KeyUtils.get32UUID();//导入是文件名重新生成
				}
				String newFilePath = filePath + "\\" + newFilename + filePostfix;//解压到临时文件夹中，文件名不变

				BufferedInputStream bis = null;
				BufferedOutputStream bos = null;
				FileOutputStream fos = null;
				try {
					bis = new BufferedInputStream(zipFile.getInputStream(entry));
					File file = new File(newFilePath);
					fos = new FileOutputStream(file);
					bos = new BufferedOutputStream(fos, BUFFER);
					int count;
					byte data[] = new byte[BUFFER];
					while ((count = bis.read(data, 0, BUFFER)) != -1) {
						bos.write(data, 0, count);
					}
				} finally {
					bos.flush();
					bos.close();
					bis.close();
					fos.close();
				}
				Map<String, String> map = new HashMap<String, String>();
				map.put("newFilePath", newFilePath);//解压后文件路径
				map.put("fileName", fileName);//解压前文件名有后缀
				map.put("newFilename", newFilename);//解压后无后缀
				System.out.println("newFilename="+newFilename);
				result.add(map);
			}
			zipFile.close();
		} catch (Exception e) {
			throw e;
		}
		return result;
	}
}