压缩解压文件工具

• 第一步引入依赖 commons-compress-1.18.jar

• 1、压缩文件夹或者文件(在srcDir里添加需要压缩的文件夹或者文件)

代码

package com.test.method;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

/**
 * @author pengzhihui
 */
public class FileZip {
    private static final int BUFFER_SIZE = 2 * 1024;

    /**
     * @param srcDir 压缩文件夹路径
     * @param outDir 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, String outDir,
                             boolean KeepDirStructure) throws RuntimeException, Exception {

        OutputStream out = new FileOutputStream(new File(outDir));

        long start = System.currentTimeMillis();
        ZipOutputStream zos = null;
        try {
            zos = new ZipOutputStream(out);
            List<File> sourceFileList = new ArrayList<File>();
            for (String dir : srcDir) {
                File sourceFile = new File(dir);
                sourceFileList.add(sourceFile);
            }
            compress(sourceFileList, zos, KeepDirStructure);
            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) throws Exception {
        byte[] buf = new byte[BUFFER_SIZE];
        if (sourceFile.isFile()) {
            zos.putNextEntry(new ZipEntry(name));
            int len;
            FileInputStream in = new FileInputStream(sourceFile);
            while ((len = in.read(buf)) != -1) {
                zos.write(buf, 0, len);
            }
            // Complete the entry
            zos.closeEntry();
            in.close();
        } else {
            File[] listFiles = sourceFile.listFiles();
            if (listFiles == null || listFiles.length == 0) {
                if (KeepDirStructure) {
                    zos.putNextEntry(new ZipEntry(name + "/"));
                    zos.closeEntry();
                }

            } else {
                for (File file : listFiles) {
                    if (KeepDirStructure) {
                        compress(file, zos, name + "/" + file.getName(),
                                KeepDirStructure);
                    } else {
                        compress(file, zos, file.getName(), KeepDirStructure);
                    }

                }
            }
        }
    }

    private static void compress(List<File> sourceFileList,
                                 ZipOutputStream zos, boolean KeepDirStructure) throws Exception {
        byte[] buf = new byte[BUFFER_SIZE];
        for (File sourceFile : sourceFileList) {
            String name = sourceFile.getName();
            if (sourceFile.isFile()) {
                zos.putNextEntry(new ZipEntry(name));
                int len;
                FileInputStream in = new FileInputStream(sourceFile);
                while ((len = in.read(buf)) != -1) {
                    zos.write(buf, 0, len);
                }
                zos.closeEntry();
                in.close();
            } else {
                File[] listFiles = sourceFile.listFiles();
                if (listFiles == null || listFiles.length == 0) {
                    if (KeepDirStructure) {
                        zos.putNextEntry(new ZipEntry(name + "/"));
                        zos.closeEntry();
                    }

                } else {
                    for (File file : listFiles) {
                        if (KeepDirStructure) {
                            compress(file, zos, name + "/" + file.getName(),
                                    KeepDirStructure);
                        } else {
                            compress(file, zos, file.getName(),
                                    KeepDirStructure);
                        }

                    }
                }
            }
        }
    }


    public static void main(String[] args) throws Exception {

        String[] srcDir = { "c:\\users\\xushunjie\\desktop\\admin",
        };
        String outDir = "c:\\users\\xushunjie\\desktop\\aaa.zip";
        toZip(srcDir, outDir, true);
    }
}

• 2、解压缩.zip文件

package com.test.method;

import java.io.*;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

/**
 * date:2019/7/26
 * writed by yangtingting
 */

public class FileUnZip {
    /**
     * zip文件解压
     * @param inputFile  待解压文件夹/文件
     * @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");
        }
        ZipFile zipFile = new ZipFile(srcFile);//创建压缩文件对象
        //开始解压
        Enumeration<?> entries = zipFile.entries();
        while (entries.hasMoreElements()) {
            ZipEntry entry = (ZipEntry) entries.nextElement();
            // 如果是文件夹，就创建个文件夹
            if (entry.isDirectory()) {
                String dirPath = destDirPath + "/" + entry.getName();
                srcFile.mkdirs();
            } else {
                // 如果是文件，就先创建一个文件，然后用io流把内容copy过去
                File targetFile = new File(destDirPath + "/" + entry.getName());
                // 保证这个文件的父文件夹必须要存在
                if (!targetFile.getParentFile().exists()) {
                    targetFile.getParentFile().mkdirs();
                }
                targetFile.createNewFile();
                // 将压缩文件内容写入到这个文件中
                InputStream is = zipFile.getInputStream(entry);
                FileOutputStream fos = new FileOutputStream(targetFile);
                int len;
                byte[] buf = new byte[1024];
                while ((len = is.read(buf)) != -1) {
                    fos.write(buf, 0, len);
                }
                // 关流顺序，先打开的后关闭
                fos.close();
                is.close();
            }
        }
    }
    public static void main(String[] args) {
        try {
            zipUncompress("c:\\users\\xushunjie\\desktop\\aaa.zip", "c:\\users\\xushunjie\\desktop\\admin解压的文件");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

压缩转载自：https://www.jianshu.com/p/352ec6d53254

解压转载自( 此文章中压缩图片文件有问题 )：https://blog.csdn.net/qq_34474324/article/details/97369763