在Javaweb项目中经常会有根据复选框勾选后,同时下载多个文件的功能,以下代码实现了批量文件打包下载
import java.io.BufferedInputStream;
import java.io.File;import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipOutputStream;
public class Test {
public static void main(String[] args) {
//需要压缩的文件--包括文件地址和文件名
String []path ={"C:\\Documents and Settings\\db2admin\\桌面\\EngineerNetworkQuery.xls",
"C:\\Documents and Settings\\db2admin\\桌面\\NetworkInfQuery.xls"};
// 要生成的压缩文件地址和文件名称
String desPath = "C:\\Documents and Settings\\db2admin\\桌面\\DownLoad.zip";
File zipFile = new File(desPath);
ZipOutputStream zipStream = null;
FileInputStream zipSource = null;
BufferedInputStream bufferStream = null;
try {
//构造最终压缩包的输出流
zipStream = new ZipOutputStream(new FileOutputStream(zipFile));
for(int i =0;i<path.length;i++){
File file = new File(path[i]);
//将需要压缩的文件格式化为输入流
zipSource = new FileInputStream(file);
//压缩条目不是具体独立的文件,而是压缩包文件列表中的列表项,称为条目,就像索引一样
ZipEntry zipEntry = new ZipEntry(file.getName());
//定位该压缩条目位置,开始写入文件到压缩包中
zipStream.putNextEntry(zipEntry);
//输入缓冲流
bufferStream = new BufferedInputStream(zipSource, 1024 * 10);
int read = 0;
//创建读写缓冲区
byte[] buf = new byte[1024 * 10];
while((read = bufferStream.read(buf, 0, 1024 * 10)) != -1)
{
zipStream.write(buf, 0, read);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
//关闭流
try {
if(null != bufferStream) bufferStream.close();
if(null != zipStream) zipStream.close();
if(null != zipSource) zipSource.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
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