需求：需要压缩一个文件夹，文件夹下有不同文件，其中有一部分不需要压缩。

方法一：目录格式按照之前文件夹格式压缩

package cn.com.vsai.knowledge.graphlabel.service;import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;public class ZipUtils {private static final int  BUFFER_SIZE = 2 * 1024;/*** 压缩成ZIP* @param srcDir 压缩文件夹路径* @param out    压缩文件输出流* @param KeepDirStructure  是否保留原来的目录结构,true:保留目录结构;* 							false:所有文件跑到压缩包根目录下(注意：不保留目录结构可能会出现同名文件,会压缩失败)* @throws RuntimeException 压缩失败会抛出运行时异常*/public static void toZip(String srcDir, OutputStream out, boolean KeepDirStructure, List<String> filesBreakList)throws RuntimeException{long start = System.currentTimeMillis();ZipOutputStream zos = null ;try {zos = new ZipOutputStream(out);File sourceFile = new File(srcDir);compress(sourceFile,zos,sourceFile.getName(),KeepDirStructure,filesBreakList);long end = System.currentTimeMillis();System.out.println("压缩完成，耗时：" + (end - start) +" ms");} catch (Exception e) {throw new RuntimeException("zip error from ZipUtils",e);}finally{if(zos != null){try {zos.close();} catch (IOException e) {e.printStackTrace();}}}}/*** 递归压缩方法* @param sourceFile 源文件* @param zos		 zip输出流* @param name		 压缩后的名称* @param KeepDirStructure  是否保留原来的目录结构,true:保留目录结构;* 							false:所有文件跑到压缩包根目录下(注意：不保留目录结构可能会出现同名文件,会压缩失败)* @throws Exception*/private static void compress(File sourceFile, ZipOutputStream zos, String name,boolean KeepDirStructure, List<String> filesBreakList) throws Exception{byte[] buf = new byte[BUFFER_SIZE];if(sourceFile.isFile()){// 向zip输出流中添加一个zip实体，构造器中name为zip实体的文件的名字zos.putNextEntry(new ZipEntry(name));// copy文件到zip输出流中int len;FileInputStream in = new FileInputStream(sourceFile);while ((len = in.read(buf)) != -1){zos.write(buf, 0, len);}// Complete the entryzos.closeEntry();in.close();} else {File[] listFiles = sourceFile.listFiles();if(listFiles == null || listFiles.length == 0){// 需要保留原来的文件结构时,需要对空文件夹进行处理if(KeepDirStructure){// 空文件夹的处理zos.putNextEntry(new ZipEntry(name + "/"));// 没有文件，不需要文件的copyzos.closeEntry();}}else {for (File file : listFiles) {// 判断是否需要保留原来的文件结构if (KeepDirStructure) {// 注意：file.getName()前面需要带上父文件夹的名字加一斜杠,// 不然最后压缩包中就不能保留原来的文件结构,即：所有文件都跑到压缩包根目录下了boolean have=false;for (String str:filesBreakList){if (str.equals(file.getName())){have=true;break;}}if(!have){compress(file, zos, name + "/" + file.getName(), KeepDirStructure,filesBreakList);}} else {compress(file, zos, file.getName(),KeepDirStructure,filesBreakList);}}}}}public static void main(String[] args) throws Exception {/** 测试压缩方法  */FileOutputStream fos1 = new FileOutputStream(new File("C:\\Users\\DELL\\Desktop\\1.zip"));List<String> filesBreakList = new ArrayList<>() ;filesBreakList.add("3.1");filesBreakList.add("3.2");System.out.println(filesBreakList);ZipUtils.toZip("C:\\Users\\DELL\\Desktop\\1", fos1,true,filesBreakList);}}

方法二：所有文件压缩到根目录

package cn.com.vsai.knowledge.graphlabel.service;import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;public class ZipUtil {private static final int  BUFFER_SIZE = 2 * 1024;/*** 压缩成ZIP* @param srcFiles 需要压缩的文件列表* @param out 	        压缩文件输出流* @throws RuntimeException 压缩失败会抛出运行时异常*/public static void toZip(List<File> srcFiles , OutputStream out)throws RuntimeException {long start = System.currentTimeMillis();ZipOutputStream zos = null ;try {zos = new ZipOutputStream(out);for (File srcFile : srcFiles) {byte[] buf = new byte[BUFFER_SIZE];zos.putNextEntry(new ZipEntry(srcFile.getName()));int len;FileInputStream in = new FileInputStream(srcFile);while ((len = in.read(buf)) != -1){zos.write(buf, 0, len);}zos.closeEntry();in.close();}long end = System.currentTimeMillis();System.out.println("压缩完成，耗时：" + (end - start) +" ms");} catch (Exception e) {throw new RuntimeException("zip error from ZipUtils",e);}finally{if(zos != null){try {zos.close();} catch (IOException e) {e.printStackTrace();}}}}public static void main(String[] args) throws Exception {/** 测试压缩方法  */List<File> fileList = new ArrayList<>();fileList.add(new File("C:\\Users\\DELL\\Desktop\\1\\1.1\\1.txt"));fileList.add(new File("C:\\Users\\DELL\\Desktop\\1\\2\\2.txt"));fileList.add(new File("C:\\Users\\DELL\\Desktop\\1\\3\\3.1\\3.txt"));FileOutputStream fos2 = new FileOutputStream(new File("C:/Users/DELL/Desktop/6.zip"));ZipUtil.toZip(fileList, fos2);}}