1. 解析zip文件读取文件流：

package test;

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;

}