java 压缩文件

 

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipOutputStream;

 

String fileName = strdate;//压缩包命名
File zipFile = new File(this.getServletConfig().getServletContext().getRealPath("/upload")+"/" + fileName +".zip");
File sourceFile = new File(path);
FileInputStream fis = null;
BufferedInputStream bis = null;
FileOutputStream fos = null;
ZipOutputStream zos = null;
File[] sourceFiles = sourceFile.listFiles();
if(sourceFiles.length > 0){
fos = new FileOutputStream(zipFile);
zos = new ZipOutputStream(new BufferedOutputStream(fos));
zos.setEncoding("GBK");
byte[] bufs = new byte[1024*10];
for(int i=0;i< sourceFiles.length;i++){
//创建ZIP实体，并添加进压缩包
ZipEntry zipEntry = new ZipEntry(sourceFiles[i].getName());
zos.putNextEntry(zipEntry);
//读取待压缩的文件并写进压缩包里
fis = new FileInputStream(sourceFiles[i]);
bis = new BufferedInputStream(fis, 1024*10);
int read = 0;
while((read=bis.read(bufs, 0, 1024*10)) != -1){
zos.write(bufs,0,read);
}
}
if(null != bis){
bis.close();
}
if(null != zos){
zos.close();
}
if(null != fos){
zos.close();
}
}