java 打包边下载_JAVA实现边下载边压缩
@ResponseBodypublic voiddownloadUrl(HttpServletResponse response, HttpServletRequest request){
String sourceFilePath=properties.getString("sourceFilePath");//要下載的文件路徑
eavlProName = xxx;//項目名
String downloadName = "xxx.zip"; //下載文件名
String agent = request.getHeader("USER-AGENT"); //瀏覽器內核信息
try{if (agent.contains("MSIE")||agent.contains("Trident")) {//IE
downloadName = java.net.URLEncoder.encode(downloadName, "UTF-8");
}else{
downloadName= new String(downloadName.getBytes("UTF-8"),"ISO-8859-1");
}
}catch(Exception e) {
e.printStackTrace();
}
zip(sourceFilePath, eavlProName, response, downloadName);
response.getOutputStream().close();//這個應該沒什么用
}private voidzip(String souceFileName, String eavlProName, HttpServletResponse response, String downloadName) {
File file= newFile(souceFileName);try{
zip(file, eavlProName, response, downloadName);
}catch(IOException e) {
e.printStackTrace();
}
}private void zip(File souceFile, String eavlProName, HttpServletResponse response, String downloadName) throwsIOException {
ZipOutputStream out= null;//設置壓縮流。
response.setHeader("Content-Disposition", "attachment;fileName=\"" + downloadName + "\"");try{
out= new ZipOutputStream(newBufferedOutputStream(response.getOutputStream()));
out.setMethod(ZipOutputStream.DEFLATED);//設置壓縮方法
} catch(Exception e) {
e.printStackTrace();
}
out.setEncoding("gbk");
zip(souceFile, out, eavlProName, eavlProName,null);
out.closeEntry();
out.close();
}private voidzip(File souceFile, ZipOutputStream out, String base, String eavlProName, Integer i)throwsIOException {if(souceFile.isDirectory()) {
File[] files=souceFile.listFiles();if (files.length != 0) {if (i == null || i != 1) { //對于地方目錄先不創建，當地方目錄下存在項目的截圖時，才創建
out.putNextEntry(new ZipEntry(base + "/"));
base= base.length() == 0 ? "" : base + "/";
}if (i == null) {
i= 0;
}
i++;for(File file : files) {if (i == null || i != 2) { //2地方下面的項目名.這種不創建目錄
zip(file, out, base +file.getName(), eavlProName, i);
}else{
String picPathname=file.getName();if (picPathname.equals(eavlProName)) { //取對應項目下的文件
zip(file, out, base, eavlProName, i);
}
}
}
}
}else{if (base.length() > 0) {
out.putNextEntry(newZipEntry(base));
}else{
out.putNextEntry(newZipEntry(souceFile.getName()));
}
FileInputStream in= newFileInputStream(souceFile);intb;byte[] by = new byte[1024];while ((b = in.read(by)) != -1) {
out.write(by,0, b);
}
in.close();
}
}
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