zoukankan      html  css  js  c++  java
  • 使用ZIP进行多文件保存和读取(JDK1.7之后ZipOutputStream已经支持中文)

     注:java.util.zip.ZipOutputStream是Java原生类,在JDK1.7之后构造器加入了编码方式,已经可以支持中文。

    ZipOutputStream
    public ZipOutputStream(OutputStream out,
                           Charset charset)
    
    Creates a new ZIP output stream.
    Parameters:out - the actual output streamcharset - the charsetto be used to encode the entry names and comments
    Since:1.7
      
    package test;
    
    import java.io.BufferedInputStream;
    import java.io.BufferedOutputStream;
    import java.io.BufferedReader;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.FileReader;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.io.PrintWriter;
    import java.nio.charset.Charset;
    import java.util.ArrayList;
    import java.util.Enumeration;
    import java.util.List;
    import java.util.zip.Adler32;
    import java.util.zip.CheckedInputStream;
    import java.util.zip.CheckedOutputStream;
    import java.util.zip.ZipEntry;
    import java.util.zip.ZipFile;
    import java.util.zip.ZipInputStream;
    import java.util.zip.ZipOutputStream;
    
    public class ZipCompress {
        private static final String FILE_PREFIX_PATH = "E:\\gittest\";
        private static final String FILE_TARGET_PATH = "E:\\gittest\Test.zip";
        private static List<String> fileList = new ArrayList<String>() {
            {
                add("第三方的身份.txt");
                add("Test2.txt");
                add("Test3.txt");
            }
        };
    
        public static void main(String[] args) {
            try {
                FileOutputStream f = new FileOutputStream(FILE_TARGET_PATH);
                CheckedOutputStream csum = new CheckedOutputStream(f, new Adler32());
                ZipOutputStream zos = new ZipOutputStream(csum, Charset.forName("UTF-8"));
                PrintWriter out = new PrintWriter(zos);
                zos.setComment("A test of java Zipping");
    
                // No corresponding getComment(), though.
                for (String item : fileList) {
                    System.out.println("Writing file: " + item);
                    BufferedReader in = new BufferedReader(
                            new InputStreamReader(new FileInputStream(FILE_PREFIX_PATH + item), "UTF-8"));
                    zos.putNextEntry(new ZipEntry(item));
                    String c;
                    while ((c = in.readLine()) != null) {
                        out.println(c);
                    }
                    in.close();
                    out.flush();
                }
                out.close();
    
                // Checksum valid only after the file has been closed!
                System.out.println("Checksum: " + csum.getChecksum().getValue());
    
                // Now extract the files - Example1:
                System.out.println("========================Reading File - Example 1================================");
                CheckedInputStream csum2 = new CheckedInputStream(new FileInputStream(FILE_TARGET_PATH), new Adler32());
                ZipInputStream in2 = new ZipInputStream(csum2, Charset.forName("UTF-8"));
                BufferedReader bi2 = new BufferedReader(new InputStreamReader(in2));
                ZipEntry ze;
                while ((ze = in2.getNextEntry()) != null) {
                    System.out.println("Reading file: " + ze);
                    String x;
                    while ((x = bi2.readLine()) != null) {
                        System.out.println(x);
                    }
                    // Line feed
                    System.out.println();
                }
                if (fileList.size() == 1) {
                    System.out.println("Checksum: " + csum.getChecksum().getValue());
                }
                bi2.close();
                // Now extract the files - Example2:
                System.out.println("========================Reading File - Example 2================================");
                ZipFile zf = new ZipFile(FILE_TARGET_PATH);
                Enumeration e = zf.entries();
                while (e.hasMoreElements()) {
                    ZipEntry ze2 = (ZipEntry) e.nextElement();
                    System.out.println("File: " + ze2);
                    BufferedReader bi3 = new BufferedReader(new InputStreamReader(zf.getInputStream(ze2)));
                    String x;
                    while ((x = bi3.readLine()) != null) {
                        System.out.println(x);
                    }
                    // Line feed
                    System.out.println();
                    bi3.close();
                }
                if (fileList.size() == 1) {
                    System.out.println("Checksum: " + csum.getChecksum().getValue());
                }
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
    
    }

    运行:

  • 相关阅读:
    PHP mysqli 扩展库(面向对象/数据库操作封装/事务控制/预编译)
    php 下载文件的函数
    PBOC电子钱包与电子现金及QPBOC
    基于PBOC电子钱包的消费过程详解
    PBOC规范下的java卡介绍
    基于PBOC电子钱包的圈存过程详解
    电子钱包和电子现金的区别
    DES,3DES,AES这三种对称密钥的区别与联系
    密钥体系
    关于卡片的主控密钥和应用主控密钥
  • 原文地址:https://www.cnblogs.com/hzb462606/p/15411367.html
Copyright © 2011-2022 走看看