java解压缩文件和不解压读取压缩文件中的文本文件内容

解压缩（压缩文件中不带文件夹）

public void unZip(String fileName){
        try {
            ZipInputStream zis = new ZipInputStream(new FileInputStream(new File(fileName)));
            BufferedInputStream bis = new BufferedInputStream(zis);
            String outPath = "E:/test";
            File outFile = null;
            ZipEntry entry = null;
            while((entry = zis.getNextEntry())!=null){
                outFile = new File(outPath, entry.getName()); 
                FileOutputStream fos = new FileOutputStream(outFile);
                BufferedOutputStream bos = new BufferedOutputStream(fos);
                int b = 0;
                while((b = bis.read())!=-1){
                    bos.write(b);
                }
                bos.close();
                fos.close();
            }
            bis.close();
            zis.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

---

解压缩（带文件夹的）

public void unZipFile(String fileName, String descDir) throws ZipException,
            IOException {
        File pathFile = new File(descDir);
        if (!pathFile.exists()) {
            pathFile.mkdirs();
        }
        Charset gbk = Charset.forName("GBK");
        ZipFile zip = new ZipFile(new File(fileName), gbk);
        for (Enumeration entries = zip.entries(); entries.hasMoreElements();) {
            ZipEntry entry = (ZipEntry) entries.nextElement();
            String zipEntryName = entry.getName();
            InputStream in = zip.getInputStream(entry);
            String outPath = (descDir + zipEntryName).replaceAll("\\*", "/");
            // 判断路径是否存在,不存在则创建文件路径
            File file = new File(outPath.substring(0, outPath.lastIndexOf('/')));
            if (!file.exists()) {
                file.mkdirs();
            }
            // 判断文件全路径是否为文件夹,如果是上面已经上传,不需要解压
            if (new File(outPath).isDirectory()) {
                continue;
            }
            // 输出文件路径信息
            System.out.println(outPath);

            OutputStream out = new FileOutputStream(outPath);
            byte[] buf1 = new byte[1024];
            int len;
            while ((len = in.read(buf1)) > 0) {
                out.write(buf1, 0, len);
            }
            in.close();
            out.close();
        }
    }

如果报错下面这个信息：

Exception in thread "main" java.lang.IllegalArgumentException: MALFORMED
    at java.util.zip.ZipCoder.toString(ZipCoder.java:58)
    at java.util.zip.ZipFile.getZipEntry(ZipFile.java:529)
    at java.util.zip.ZipFile.access$900(ZipFile.java:56)
    at java.util.zip.ZipFile$1.nextElement(ZipFile.java:511)
    at java.util.zip.ZipFile$1.nextElement(ZipFile.java:481)

那么则十有八九是因为中文编码导致的，根据需求设置：

Charset gbk = Charset.forName("GBK");
ZipFile zip = new ZipFile(new File(fileName), gbk);

---

不解压文件直接读取压缩文件中的xml文本

public void readZip(String fileName) throws IOException{
        ZipFile zip = new ZipFile(fileName);
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream(fileName));
        ZipInputStream zis = new ZipInputStream(bis);
        ZipEntry entry ;
        while((entry = zis.getNextEntry())!=null){
            if(entry.isDirectory()){
                System.out.println("文件夹");
            }else{
                System.out.println("file:"+entry.getName());
                if("test.xml".equals(entry.getName())){
                    BufferedReader reader = new BufferedReader(new InputStreamReader(zip.getInputStream(entry)));
                    String line = null;
                    while((line = reader.readLine())!=null){
                        System.out.println(line);
                    }
                }
            }
        }
    }

测试结果：
压缩文件格式：

test.xml内容：

运行结果：