亲测可用，压缩文件不会有合并问题

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;/*** 文件压缩成zip*/
public class FileZip {/*** zip文件压缩* @param inputFile 待压缩文件夹/文件名* @param outputFile 生成的压缩包名字*/public static void zipCompress(String inputFile, String outputFile) throws Exception {//创建zip输出流ZipOutputStream out = new ZipOutputStream(new FileOutputStream(outputFile));//创建缓冲输出流BufferedOutputStream bos = new BufferedOutputStream(out);File input = new File(inputFile);compress(out, bos, input,null);bos.close();out.close();}/*** @param name 压缩文件名，可以写为null保持默认*///递归压缩public static void compress(ZipOutputStream out, BufferedOutputStream bos, File input, String name) throws IOException {if (name == null) {name = input.getName();}//如果路径为目录（文件夹）if (input.isDirectory()) {//取出文件夹中的文件（或子文件夹）File[] flist = input.listFiles();if (flist.length == 0)//如果文件夹为空，则只需在目的地zip文件中写入一个目录进入{out.putNextEntry(new ZipEntry(name + "/"));} else//如果文件夹不为空，则递归调用compress，文件夹中的每一个文件（或文件夹）进行压缩{for (int i = 0; i < flist.length; i++) {compress(out, bos, flist[i], name + "/" + flist[i].getName());}}} else//如果不是目录（文件夹），即为文件，则先写入目录进入点，之后将文件写入zip文件中{out.putNextEntry(new ZipEntry(name));FileInputStream fos = new FileInputStream(input);BufferedInputStream bis = new BufferedInputStream(fos);int len=-1;//将源文件写入到zip文件中byte[] buf = new byte[1024];while ((len = bis.read(buf)) != -1) {bos.write(buf,0,len);}bos.flush();//很关键，网上的代码都没有这一行，导致文件合并在一起了bis.close();fos.close();}}/*** zip解压* @param inputFile 待解压文件名* @param destDirPath  解压路径*/public static void zipUncompress(String inputFile, String destDirPath) throws Exception {File srcFile = new File(inputFile);//获取当前压缩文件// 判断源文件是否存在if (!srcFile.exists()) {throw new Exception(srcFile.getPath() + "所指文件不存在");}//开始解压//构建解压输入流ZipInputStream zIn = new ZipInputStream(new FileInputStream(srcFile));ZipEntry entry = null;File file = null;while ((entry = zIn.getNextEntry()) != null) {if (!entry.isDirectory()) {file = new File(destDirPath, entry.getName());if (!file.exists()) {new File(file.getParent()).mkdirs();//创建此文件的上级目录}OutputStream out = new FileOutputStream(file);BufferedOutputStream bos = new BufferedOutputStream(out);int len = -1;byte[] buf = new byte[1024];while ((len = zIn.read(buf)) != -1) {bos.write(buf, 0, len);}// 关流顺序，先打开的后关闭bos.close();out.close();}}}public static void main(String[] args) {try {zipCompress("E:\\tmp\\bb73bdf333304f1392a11e0ca87a571e", "E:\\tmp\\bb73bdf333304f1392a11e0ca87a571e.zip");zipUncompress("E:\\tmp\\bb73bdf333304f1392a11e0ca87a571e.zip","E:\\tmp\\bb73bdf333304f1392a11e0ca87a571e_D");} catch (Exception e) {e.printStackTrace();}}
}