使用commons-compress操作zip文件(压缩和解压缩)

http://www.cnblogs.com/luxh/archive/2012/06/28/2568758.html

     Apache Commons Compress是一个压缩、解压缩文件的类库。

  可以操作ar, cpio, Unix dump, tar, zip, gzip, XZ, Pack200 and bzip2格式的文件,功能比较强大。

  在这里写两个用Commons Compress把文件压缩成zip和从zip解压缩的方法。

  直接贴上工具类代码:

/** 
 * Zip文件工具类 
 * @author Luxh 
 */  
public class ZipFileUtil {  
       
    /** 
     * 把文件压缩成zip格式 
     * @param files         需要压缩的文件 
     * @param zipFilePath 压缩后的zip文件路径   ,如"D:/test/aa.zip"; 
     */  
    public static void compressFiles2Zip(File[] files,String zipFilePath) {  
        if(files != null && files.length >0) {  
            if(isEndsWithZip(zipFilePath)) {  
                ZipArchiveOutputStream zaos = null;  
                try {  
                    File zipFile = new File(zipFilePath);  
                    zaos = new ZipArchiveOutputStream(zipFile);  
                    //Use Zip64 extensions for all entries where they are required  
                    zaos.setUseZip64(Zip64Mode.AsNeeded);  
                       
                    //将每个文件用ZipArchiveEntry封装  
                    //再用ZipArchiveOutputStream写到压缩文件中  
                    for(File file : files) {  
                        if(file != null) {  
                            ZipArchiveEntry zipArchiveEntry  = new ZipArchiveEntry(file,file.getName());  
                            zaos.putArchiveEntry(zipArchiveEntry);  
                            InputStream is = null;  
                            try {  
                                is = new BufferedInputStream(new FileInputStream(file));  
                                byte[] buffer = new byte[1024 * 5];    
                                int len = -1;  
                                while((len = is.read(buffer)) != -1) {  
                                    //把缓冲区的字节写入到ZipArchiveEntry  
                                    zaos.write(buffer, 0, len);  
                                }  
                                //Writes all necessary data for this entry.  
                                zaos.closeArchiveEntry();    
                            }catch(Exception e) {  
                                throw new RuntimeException(e);  
                            }finally {  
                                if(is != null)   
                                    is.close();  
                            }  
                               
                        }  
                    }  
                    zaos.finish();  
                }catch(Exception e){  
                    throw new RuntimeException(e);  
                }finally {  
                        try {  
                            if(zaos != null) {  
                                zaos.close();  
                            }  
                        } catch (IOException e) {  
                            throw new RuntimeException(e);  
                        }  
                }  
                   
            }  
               
        }  
           
    }  
       
    /** 
     * 把zip文件解压到指定的文件夹 
     * @param zipFilePath   zip文件路径, 如 "D:/test/aa.zip" 
     * @param saveFileDir   解压后的文件存放路径, 如"D:/test/" 
     */  
    public static void decompressZip(String zipFilePath,String saveFileDir) {  
        if(isEndsWithZip(zipFilePath)) {  
            File file = new File(zipFilePath);  
            if(file.exists()) {  
                InputStream is = null;  
                //can read Zip archives  
                ZipArchiveInputStream zais = null;  
                try {  
                    is = new FileInputStream(file);  
                    zais = new ZipArchiveInputStream(is);  
                    ArchiveEntry  archiveEntry = null;  
                    //把zip包中的每个文件读取出来  
                    //然后把文件写到指定的文件夹  
                    while((archiveEntry = zais.getNextEntry()) != null) {  
                        //获取文件名  
                        String entryFileName = archiveEntry.getName();  
                        //构造解压出来的文件存放路径  
                        String entryFilePath = saveFileDir + entryFileName;  
                        byte[] content = new byte[(int) archiveEntry.getSize()];  
                        zais.read(content);  
                        OutputStream os = null;  
                        try {  
                            //把解压出来的文件写到指定路径  
                            File entryFile = new File(entryFilePath);  
                            os = new BufferedOutputStream(new FileOutputStream(entryFile));  
                            os.write(content);  
                        }catch(IOException e) {  
                            throw new IOException(e);  
                        }finally {  
                            if(os != null) {  
                                os.flush();  
                                os.close();  
                            }  
                        }  
                           
                    }  
                }catch(Exception e) {  
                    throw new RuntimeException(e);  
                }finally {  
                        try {  
                            if(zais != null) {  
                                zais.close();  
                            }  
                            if(is != null) {  
                                is.close();  
                            }  
                        } catch (IOException e) {  
                            throw new RuntimeException(e);  
                        }  
                }  
            }  
        }  
    }  
       
    /** 
     * 判断文件名是否以.zip为后缀 
     * @param fileName        需要判断的文件名 
     * @return 是zip文件返回true,否则返回false 
     */  
    public static boolean isEndsWithZip(String fileName) {  
        boolean flag = false;  
        if(fileName != null && !"".equals(fileName.trim())) {  
            if(fileName.endsWith(".ZIP")||fileName.endsWith(".zip")){  
                flag = true;  
            }  
        }  
        return flag;  
    }  
       
}  

测试代码:
[java] view plain copy print?
package cn.luxh.test;  
   
import java.io.File;  
   
import org.junit.Test;  
   
import cn.luxh.utils.ZipFileUtil;  
   
/** 
 * 测试ZipFileUtil的压缩和解压缩方法 
 * @author Luxh 
 */  
public class ZipFileUtilTest {  
       
    @Test  
    public void testCompressFiles2Zip() {  
        //存放待压缩文件的目录  
        File srcFile = new File("D:/test");  
        //压缩后的zip文件路径  
        String zipFilePath = "d:/test2/test.zip";  
        if(srcFile.exists()) {  
            File[] files = srcFile.listFiles();  
            ZipFileUtil.compressFiles2Zip(files, zipFilePath);  
        }  
    }  
       
    @Test  
    public void testDecompressZip()  {  
        //压缩包所在路径  
        String zipFilePath = "d:/test2/test.zip";  
        //解压后的文件存放目录  
        String saveFileDir = "d:/test2/";  
        //调用解压方法  
        ZipFileUtil.decompressZip(zipFilePath, saveFileDir);  
    }  
}  
原文地址:https://www.cnblogs.com/dhcn/p/7105442.html