import java.io.BufferedInputStream; import java.io.BufferedReader; import java.io.FileInputStream; import java.io.InputStream; import java.io.InputStreamReader; import java.util.zip.ZipEntry; import java.util.zip.ZipFile; import java.util.zip.ZipInputStream; public class aaaa { public static void main(String[] args) throws Exception { try { readZipFile("D:\\ztree.zip"); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); public static void readZipFile(String file) throws Exception { ZipFile zf = new ZipFile(file); InputStream in = new BufferedInputStream(new FileInputStream(file)); ZipInputStream zin = new ZipInputStream(in); ZipEntry ze; while ((ze = zin.getNextEntry()) != null) { if (ze.isDirectory()) { } else { System.err.println("file - " + ze.getName() + " : " + ze.getSize() + " bytes"); long size = ze.getSize(); if (size > 0) { BufferedReader br = new BufferedReader( new InputStreamReader(zf.getInputStream(ze))); String line; while ((line = br.readLine()) != null) { System.out.println(line); br.close(); System.out.println(); zin.closeEntry();

2、读取文件，压缩zip并下载；

//java自带的类库，实现zip压缩打包文件下载, 不支持中文文件名
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Date;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class test {
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("APPLICATION/OCTET-STREAM");
        response.setHeader("Content-Disposition", "attachment; filename=" + this.getZipFilename());
        System.out.println("in BatchDownload................");
        ZipOutputStream zos = new ZipOutputStream(response.getOutputStream());
        File[] files = new File[2];
        files[0] = new File("D:/OptiCM-POC/KDKK3Project/KDKK/images/1.jpg");
        files[1] = new File("D:/OptiCM-POC/KDKK3Project/KDKK/images/2.jpg");
        zipFile(files, "", zos);
        zos.flush();
        zos.close();
    private void zipFile(File[] subs, String baseName, ZipOutputStream zos) throws IOException {
        for (int i = 0; i < subs.length; i++) {
            File f = subs[i];
            zos.putNextEntry(new ZipEntry(baseName + f.getName()));
            FileInputStream fis = new FileInputStream(f);
            byte[] buffer = new byte[1024];
            int r = 0;
            while ((r = fis.read(buffer)) != -1) {
                zos.write(buffer, 0, r);
            fis.close();
    private String getZipFilename() {
        Date date = new Date();
        String s = date.getTime() + ".zip";
        return s;
3、java操作文件(压缩文件，导出zip,删除zip,写入文件，读取文件)
 
//压缩文件(防止中文乱码----使用apache的ZipOutputStream包)
    private static void writeZip(String[] strs,String zipname,String temppath) throws IOException {
        String[] files = strs;
        OutputStream os = new BufferedOutputStream(new FileOutputStream(temppath+"//"+zipname));
        ZipOutputStream zos = new ZipOutputStream(os);
        byte[] buf = new byte[8192];
        int len;
        for (int i=0;i 0 ) {
                zos.write( buf, 0, len );
            zos.closeEntry();
            bis.close();
         zos.setEncoding("GBK");
         for(int i=0;i 0 ) //切忌这后面不能加 分号 ”;“  
                     os.write(buf, 0, len);//向客户端输出，实际是把数据存放在response中，然后web服务器再去response中读取  
                in.close();
                os.close();
                deleteZip(temppath);//导出后删除zip
     * 追加文件：使用FileWriter---写入
    public static void appendMethodB(String fileName, StringBuffer content) {
        try {
            //打开一个写文件器，构造函数中的第二个参数true表示以追加形式写文件
            FileWriter writer = new FileWriter(fileName, true);
            /*OutputStreamWriter osw = new OutputStreamWriter(new FileOutputStream(fileName, true),"UTF-8");
            osw.write(content);
            osw.close();*/
            writer.write(content.toString());
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
     * 功能：Java读取txt文件的内容
     * 步骤：1：先获得文件句柄
     * 2：获得文件句柄当做是输入一个字节码流，需要对这个输入流进行读取
     * 3：读取到输入流后，需要读取生成字节流
     * 4：一行一行的输出。readline()。
     * 备注：需要考虑的是异常情况
     * @param filePath
    public static ArrayList readTxtFile(String filePath){
         ArrayList readList = new ArrayList();  
        try {
                String encoding="GBK";
                File file=new File(filePath);
                if(file.isFile() && file.exists()){ //判断文件是否存在
                    InputStreamReader read = new InputStreamReader(
                    new FileInputStream(file),encoding);//考虑到编码格式
                    BufferedReader bufferedReader = new BufferedReader(read);
                    String lineTxt = null;
                    while((lineTxt = bufferedReader.readLine()) != null){
                        readList.add(lineTxt);                         
                    read.close();
        }else{
            System.out.println("找不到指定的文件");
        } catch (Exception e) {
            System.out.println("读取文件内容出错");
            e.printStackTrace();
        return readList;