Java解压zip文件

雨点打透心脏的1/2处 2022-01-22 13:53 390阅读 0赞

### Java解压zip文件 ###

*  前提
 *  代码
 *   *   *  pom.xml
         *  ZipUtil.java
 *  运行

# 前提 #

zip文件存在：D:\\tmp\\mytest.zip。下面将以解压“D:\\tmp\\mytest.zip”到目录“D:\\tmp”为例进行示例。

# 代码 #

### pom.xml ###

<dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.16.20</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-simple</artifactId>
        <version>1.7.25</version>
    </dependency>

### ZipUtil.java ###

package com.ydfind.zip;
    
    import lombok.extern.slf4j.Slf4j;
    
    import java.io.*;
    import java.util.Enumeration;
    import java.util.zip.ZipEntry;
    import java.util.zip.ZipFile;
    
    /**
     * zip解压示例
     *
     * @author : ydfind
     * @date : 2019-06-06
     */
    @Slf4j
    public class ZipUtil {
    
        public static void main(String[] args) throws IOException {
            String filename = "D:\\tmp\\mytest.zip";
            String path = "D:\\tmp";
            ZipUtil.unZip(filename, path);
        }
    
    
        public static void unZip(String sourceFilename, String targetDir) throws IOException {
            unZip(new File(sourceFilename), targetDir);
        }
    
        /**
         * 将sourceFile解压到targetDir
         * @param sourceFile
         * @param targetDir
         * @throws RuntimeException
         */
        public static void unZip(File sourceFile, String targetDir) throws IOException {
            long start = System.currentTimeMillis();
            if (!sourceFile.exists()) {
                throw new FileNotFoundException("cannot find the file = " + sourceFile.getPath());
            }
            ZipFile zipFile = null;
            try{
                zipFile = new ZipFile(sourceFile);
                Enumeration<?> entries = zipFile.entries();
                while (entries.hasMoreElements()) {
                    ZipEntry entry = (ZipEntry) entries.nextElement();
                    if (entry.isDirectory()) {
                        String dirPath = targetDir + "/" + entry.getName();
                        createDirIfNotExist(dirPath);
                    } else {
                        File targetFile = new File(targetDir + "/" + entry.getName());
                        createFileIfNotExist(targetFile);
                        InputStream is = null;
                        FileOutputStream fos = null;
                        try {
                            is = zipFile.getInputStream(entry);
                            fos = new FileOutputStream(targetFile);
                            int len;
                            byte[] buf = new byte[1024];
                            while ((len = is.read(buf)) != -1) {
                                fos.write(buf, 0, len);
                            }
                        }finally {
                            try{
                                fos.close();
                            }catch (Exception e){
                                log.warn("close FileOutputStream exception", e);
                            }
                            try{
                                is.close();
                            }catch (Exception e){
                                log.warn("close InputStream exception", e);
                            }
                        }
                    }
                }
                log.info("解压完成，耗时：" + (System.currentTimeMillis() - start) +" ms");
            } finally {
                if(zipFile != null){
                    try {
                        zipFile.close();
                    } catch (IOException e) {
                        log.warn("close zipFile exception", e);
                    }
                }
            }
        }
    
        public static void createDirIfNotExist(String path){
            File file = new File(path);
            createDirIfNotExist(file);
        }
    
        public static void createDirIfNotExist(File file){
            if(!file.exists()){
                file.mkdirs();
            }
        }
    
        public static void createFileIfNotExist(File file) throws IOException {
            createParentDirIfNotExist(file);
            file.createNewFile();
        }
    
    //    public static void createParentDirIfNotExist(String filename){
    //        File file = new File(filename);
    //        createParentDirIfNotExist(file);
    //    }
    
        public static void createParentDirIfNotExist(File file){
            createDirIfNotExist(file.getParentFile());
        }
    }

# 运行 #

运行ZipUtil.java结果如下，已解压到当前目录  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NuZGF5WVU_size_16_color_FFFFFF_t_70]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NuZGF5WVU_size_16_color_FFFFFF_t_70 1]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NuZGF5WVU_size_16_color_FFFFFF_t_70]: /images/20220122/e709ba189f6447efbe1e91b344756e11.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NuZGF5WVU_size_16_color_FFFFFF_t_70 1]: /images/20220122/41c57ebb7ace4c488436dc574a261615.png