700字范文 > java压缩和解压ZIP和RAR文件踩坑实践

java压缩和解压ZIP和RAR文件踩坑实践

时间：2019-07-27 15:10:41

java压缩和解压ZIP和RAR文件

该文章主要内容1.引入依赖2. 支持解压缩ZIP和winrar 5版本以上的RAR代码3. 解压缩方式说明3.1 ZIP可以使用 apache ant 实现文件压缩/解压缩3.2 winrar 5以下使用java-unrar解压缩，winrar 5需要使用命令解压缩3.2.1 使用 java-unrar-0.3.jar解压缩3.2.2 使用 junrar-3.0.0jar解压缩3.2.3 使用命令解压缩3.3 Linux版本安装unrar

该文章主要内容

1.引入依赖

<dependency><groupId>org.apache.ant</groupId><artifactId>ant</artifactId><version>1.10.5</version></dependency><dependency><groupId>com.github.axet</groupId><artifactId>java-unrar</artifactId><version>1.7.0-8</version></dependency>

2. 支持解压缩ZIP和winrar 5版本以上的RAR代码

import com.github.junrar.Archive;import com.github.junrar.rarfile.FileHeader;import org.apache.tools.zip.ZipEntry;import org.apache.tools.zip.ZipFile;import java.io.*;import java.util.Enumeration;public class UnZipAndRarUtil {// 获取当前运行环境是win还是linuxprivate static final boolean isLinux = System.getProperty("os.name").toLowerCase().indexOf("linux") >= 0;/*** 使用apache ant实现zip解压缩* @param sourceZip 压缩文件* @param outDir 解压结果路径* @throws IOException*/public static void unZip(String sourceZip, String outDir) throws IOException {File outFileDir = new File(outDir);if (!outFileDir.exists()) {boolean isMakDir = outFileDir.mkdirs();if (isMakDir) {System.out.println("创建压缩目录成功");}}ZipFile zip = new ZipFile(new File(sourceZip));for (Enumeration enumeration = zip.getEntries(); enumeration.hasMoreElements(); ) {ZipEntry entry = (ZipEntry) enumeration.nextElement();String zipEntryName = entry.getName();InputStream in = zip.getInputStream(entry);if (entry.isDirectory()) {//处理压缩文件包含文件夹的情况File fileDir = new File(outDir + zipEntryName);fileDir.mkdir();continue;}File file = new File(outDir, zipEntryName);file.createNewFile();OutputStream out = new FileOutputStream(file);byte[] buff = new byte[1024];int len;while ((len = in.read(buff)) > 0) {out.write(buff, 0, len);}in.close();out.close();}}/*** 使用junrar解压,只支持winrar 5以下解压缩* @param sourceRar 压缩文件* @param outDir 解压结果路径* @throws Exception*/public static void unRar(String sourceRar, String outDir) throws Exception {File outFileDir = new File(outDir);if (!outFileDir.exists()) {boolean isMakDir = outFileDir.mkdirs();if (isMakDir) {System.out.println("创建压缩目录成功");}}Archive archive = new Archive(new FileInputStream(new File(sourceRar)));FileHeader fileHeader = archive.nextFileHeader();while (fileHeader != null) {if (fileHeader.isDirectory()) {fileHeader = archive.nextFileHeader();continue;}File out = new File(outDir + fileHeader.getFileNameString());if (!out.exists()) {if (!out.getParentFile().exists()) {out.getParentFile().mkdirs();}out.createNewFile();}FileOutputStream os = new FileOutputStream(out);archive.extractFile(fileHeader, os);os.close();fileHeader = archive.nextFileHeader();}archive.close();}/*** 采用命令行方式解压文件,支持winrar 5以上解压缩* @param sourceRar 压缩文件* @param destDir 解压结果路径* @param cmdPath WinRAR.exe的路径，也可以在代码中写死* @return*/public static boolean realExtract(String sourceRar, String destDir,String cmdPath) {File zipFile = new File(sourceRar);// 解决路径中存在/..格式的路径问题destDir = new File(destDir).getAbsoluteFile().getAbsolutePath();while(destDir.contains("..")) {String[] sepList = destDir.split("\\\\");destDir = "";for (int i = 0; i < sepList.length; i++) {if(!"..".equals(sepList[i]) && i < sepList.length -1 && "..".equals(sepList[i+1])) {i++;} else {destDir += sepList[i] + File.separator;}}}boolean bool = false;if (!zipFile.exists()) {return false;}// 开始调用命令行解压，参数-o+是表示覆盖的意思cmdPath = "C:\\Program Files\\WinRAR\\WinRAR.exe";if (isLinux) {cmdPath = "/usr/local/bin/unrar";}String cmd = cmdPath + " X -o+ " + zipFile + " " + destDir;System.out.println(cmd);try {Process proc = Runtime.getRuntime().exec(cmd);if (proc.waitFor() != 0) {if (proc.exitValue() == 0) {bool = false;}} else {bool = true;}} catch (Exception e) {e.printStackTrace();}System.out.println("解压" + (bool ? "成功" : "失败"));return bool;}private static void unfile(String sourceFile, String destDir) throws Exception {// 根据类型，进行相应的解压缩String type = sourceFile.substring(sourceFile.lastIndexOf(".") + 1);if (type.toLowerCase().equals("zip")) {UnZipAndRarUtil.unZip(sourceFile, destDir);} else if (type.toLowerCase().equals("rar")) {UnZipAndRarUtil.realExtract(sourceFile, destDir, null);} else {System.out.println(type.toLowerCase());throw new RuntimeException("deCompress: 只支持zip和rar格式的压缩包！");}}/*** 解压到指定目录*/public static void deCompress(String sourceFile, String destDir) throws Exception {if (sourceFile == null || destDir == null) {throw new RuntimeException("deCompress: 目录不能为空");}// 保证文件夹路径最后是"/"或者"\"char lastChar = destDir.charAt(destDir.length() - 1);if (lastChar != '/' && lastChar != '\\') {// 代码中拼接文件夹 / 建议都用File.separator规避系统不同系统影响destDir += File.separator;}unfile(sourceFile, destDir);}/*** 解压到指定目录*/public static void deCompress(File sourceFile, String destDir) throws Exception {if (!sourceFile.exists() || sourceFile.isDirectory()) {throw new RuntimeException("deCompress: 文件不存在");}deCompress(sourceFile.getPath(), destDir);}/*** 解压到当前目录*/public static void deCompress(String sourceFile) throws Exception {// 获得文件目录int i = sourceFile.lastIndexOf("/");int d = sourceFile.lastIndexOf("\\");if (i == -1 && d == -1) {throw new RuntimeException("deCompress: 目录separator异常");} else if (i == -1) {i = d;}String destDir = sourceFile.substring(0, i + 1);unfile(sourceFile, destDir);}/*** 解压到当前目录* @param sourceFile 当前文件路径* @throws Exception*/public static void deCompress(File sourceFile) throws Exception {if (!sourceFile.exists() || sourceFile.isDirectory()) {throw new RuntimeException("deCompress: 文件不存在");}deCompress(sourceFile.getPath());}public static void main(String[] args) throws Exception {String zipFilepath = "E:\\自己\\test\\自己.rar";UnZipAndRarUtil.deCompress(new File(zipFilepath));}}