将多个文件进行压缩处理，然后传输到服务器
目前项目正需要多个文件压缩上传，在这里遇到一些坑与解决方案。
我这里的问题是从打印机复印，扫描时候的留底文件。在拿到文件路径后，就要根据这个路径拿到文件，进行压缩传输，可供下载。
其中遇到的问题
1、使用这个thumbnailator-0.4.7.jar对图片进行再压缩，会十分损耗资源，以至于在打印机打印完成后，直接卡住。这个压缩工具慎用！
2、在不使用上面这个工具传输的时候，即时原大小的文件，上传速度也是可行的。只是在一次性将流文件直接传输给压缩流，会出现文件流叠加的问题
从而导致文件显示出现问题。解决办法是流在传输的时候，分段传输，这样就不会出现这种问题。
参考资料：@1.http://www.oschina.net/code/snippet_4873_4142
@2.http://www.cnblogs.com/tnxk/archive/2011/09/22/2185248.html
@3.http://blog.csdn.net/zx4321/article/details/7712290
通过下面的方式，就可以将多个图片压缩成一个压缩流。这样就可以灵活操作这个文件流了
/**
* 获取多个压缩文件的流文件
* @param bytesList
* @param nameList
* @param fileList
* @param compress
* @return
* @throws Exception
*/
public static byte[] zipBytes(ArrayList nameList,ArrayList fileList) throws Exception {
ByteArrayOutputStream tempByteOStream = null;
BufferedOutputStream tempBufferOStream = null;
ZipOutputStream tempZStream = null;
ZipEntry tempEntry = null;
byte[] tempBytes = null;
tempByteOStream = new ByteArrayOutputStream();
CheckedOutputStream csum1 = new CheckedOutputStream(tempByteOStream, new Adler32());
tempZStream = new ZipOutputStream(csum1);
tempBufferOStream = new BufferedOutputStream(tempZStream);
for(int i=0;i
/**
* 遍历文件目录
* @param path
*/
public static void getFiles( URI path )
{
ArrayList filelist = new ArrayList();
File root = new File( path );
File[] files = root.listFiles();
System.out.println("======================[AuditSample] File Exists :================"+root);
System.out.println("======================[AuditSample] File listFiles :================"+files);
for ( File file : files )
{
if ( file.isDirectory() )
{
try {
getFiles(new URI(file.getAbsolutePath()));
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
filelist.add( file.getAbsolutePath() );
System.out.println( "显示" + path + "下所有子目录及其文件" + file.getAbsolutePath() );
}else{
System.out.println( "显示" + path + "下所有子目录" + file.getAbsolutePath() );
}
}
} 这里，我采用了多线程处理的方式来处理上传文件，这样就不会影响主线程进行其他操作了
package com.bips.samsung.utils;
import java.io.File;
import java.io.FileInputStream;
import java.net.URI;
import java.util.ArrayList;
import com.bips.samsung.service.HttpService;
import com.bips.samsung.service.impl.HttpServiceImpl;
public class UploadFiles implements Runnable{
private URI uri;
private String sessionId;
private String jobId;
private String fileType;
private String tokenID;
public UploadFiles(URI uri,String sessionId,String jobId,String fileType,String tokenID){
this.uri=uri;
this.sessionId=sessionId;
this.jobId=jobId;
this.fileType=fileType;
this.tokenID=tokenID;
}
/**
* 上传图片压缩包到服务器
* @param uri
* @return
*/
@Override
public void run() {
System.out.println("=========================文件開始上傳！============================"+System.currentTimeMillis());
HttpService httpService=new HttpServiceImpl();
try {
//遍历文件目录下的文件
FTPUtils.getFiles(uri);
File file=new File(uri);
ArrayList fileList=new ArrayList();
ArrayList list=new ArrayList();
ArrayList inputStreamList=new ArrayList();
FileInputStream filein=null;
if(file.exists()){
File[] listFiles = file.listFiles();
for(int i=0;i 自己定义http传输协议，进行文件上传
/**
* 上传压缩文件
* @param url
* @param params
* @param zipBytes
* @return
* @throws Exception
*/
public static URLConnection uploadFile(String url, Map params, byte [] zipBytes){
final String BOUNDARY = "---------------------------7da2137580612"; //数据分隔线
final String endline ="--"+BOUNDARY + "--\r\n";//数据结束标志
HttpURLConnection conn=null;
StringBuffer strBuf1=null;
StringBuffer strBuf2=null;
System.out.println("json字符串信息为\r\n"+JSON.toJSONString(params));
if (params != null && !params.isEmpty()) {
strBuf1= new StringBuffer();
strBuf1.append("--");
strBuf1.append(BOUNDARY);
strBuf1.append("\r\n");
strBuf1.append("Content-Disposition: form-data; name=\"json"+"\"\r\n\r\n");
strBuf1.append(JSON.toJSONString(params));
strBuf1.append("\r\n");
strBuf1.append("--");
strBuf1.append(BOUNDARY);
strBuf1.append("\r\n");
}
if(zipBytes.length>0){
strBuf2= new StringBuffer();
strBuf2.append("Content-Disposition: form-data; name=\"file"+"\"; filename=\"copyOrScan.zip"+"\"\r\n");
strBuf2.append("Content-Type: image/jpeg/zip" + "\r\n\r\n");
}
int dataLength = strBuf1.toString().getBytes().length+strBuf2.length()+zipBytes.length;
try {
//封装请求内容
URL url1 = new URL(url);
conn= (HttpURLConnection) url1.openConnection();
conn.setRequestMethod("POST");
conn.setDoOutput(true);
conn.setConnectTimeout(5000);
conn.setReadTimeout(30000);
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setUseCaches(false);
//设置请求头
conn.setRequestProperty("Accept", "Accept: text/html, application/xaml+xml,*/*");
conn.setRequestProperty("Content-type", "multipart/form-data; boundary="+ BOUNDARY);
conn.setRequestProperty("Content-Length", dataLength+"");
conn.connect();
DataOutputStream ds = new DataOutputStream(conn.getOutputStream());
ds.write(strBuf1.toString().getBytes("UTF-8"));
ds.write(strBuf2.toString().getBytes("UTF-8"));
InputStream in=new ByteArrayInputStream(zipBytes);
int buffSize=1024;
int length=-1;
byte [] buff=new byte[buffSize];
while((length=in.read(buff))!=-1){
ds.write(buff,0,length);
}
System.out.println("================字节流总大小为==============="+zipBytes.length);
ds.flush();
ds.write("\r\n".getBytes("UTF-8"));
ds.write(endline.getBytes("UTF-8"));
ds.write("\r\n".getBytes("UTF-8"));
conn.getResponseCode(); // 为了发送成功
ds.close();
return conn;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 直接通过HTTP协议提交数据到服务器,实现如下面表单提交功能:
*
* @param path 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，因为它会指向手机模拟器，你可以使用http://www.itcast.cn或http://192.168.1.10:8080这样的路径测试)
* @param params 请求参数 key为参数名,value为参数值
* @param file 上传文件
*/
@SuppressWarnings("resource")
public static boolean uploadFiles(String path, Map params, FormFile[] files) throws Exception{
final String BOUNDARY = "---------------------------7da2137580612"; //数据分隔线
final String endline = "--" + BOUNDARY + "--\r\n";//数据结束标志
int fileDataLength = 0;
if(files!=null&&files.length!=0){
for(FormFile uploadFile : files){//得到文件类型数据的总长度
StringBuilder fileExplain = new StringBuilder();
fileExplain.append("--");
fileExplain.append(BOUNDARY);
fileExplain.append("\r\n");
fileExplain.append("Content-Disposition: form-data;name=\""+ uploadFile.getParameterName()+"\";filename=\""+ uploadFile.getFilname() + "\"\r\n");
fileExplain.append("Content-Type: "+ uploadFile.getContentType()+"\r\n\r\n");
fileExplain.append("\r\n");
fileDataLength += fileExplain.length();
if(uploadFile.getInStream()!=null){
fileDataLength += uploadFile.getFile().length();
}else{
fileDataLength += uploadFile.getData().length;
}
}
}
StringBuilder textEntity = new StringBuilder();
if(params!=null&&!params.isEmpty()){
for (Map.Entry entry : params.entrySet()) {//构造文本类型参数的实体数据
textEntity.append("--");
textEntity.append(BOUNDARY);
textEntity.append("\r\n");
textEntity.append("Content-Disposition: form-data; name=\""+ entry.getKey() + "\"\r\n\r\n");
textEntity.append(entry.getValue());
textEntity.append("\r\n");
}
}
//计算传输给服务器的实体数据总长度
int dataLength = textEntity.toString().getBytes().length + fileDataLength + endline.getBytes().length;
URL url = new URL(path);
int port = url.getPort()==-1 ? 80 : url.getPort();
Socket socket = new Socket(InetAddress.getByName(url.getHost()), port);
OutputStream outStream = socket.getOutputStream();
//下面完成HTTP请求头的发送
String requestmethod = "POST "+ url.getPath()+" HTTP/1.1\r\n";
outStream.write(requestmethod.getBytes());
String accept = "Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*\r\n";
outStream.write(accept.getBytes());
String language = "Accept-Language: zh-CN\r\n";
outStream.write(language.getBytes());
String contenttype = "Content-Type: multipart/form-data; boundary="+ BOUNDARY+ "\r\n";
outStream.write(contenttype.getBytes());
String contentlength = "Content-Length: "+ dataLength + "\r\n";
outStream.write(contentlength.getBytes());
String alive = "Connection: Keep-Alive\r\n";
outStream.write(alive.getBytes());
String host = "Host: "+ url.getHost() +":"+ port +"\r\n";
outStream.write(host.getBytes());
//写完HTTP请求头后根据HTTP协议再写一个回车换行
outStream.write("\r\n".getBytes());
//把所有文本类型的实体数据发送出来
outStream.write(textEntity.toString().getBytes());
//把所有文件类型的实体数据发送出来
if(files!=null&&files.length!=0){
for(FormFile uploadFile : files){
StringBuilder fileEntity = new StringBuilder();
fileEntity.append("--");
fileEntity.append(BOUNDARY);
fileEntity.append("\r\n");
fileEntity.append("Content-Disposition: form-data;name=\""+ uploadFile.getParameterName()+"\";filename=\""+ uploadFile.getFilname() + "\"\r\n");
fileEntity.append("Content-Type: "+ uploadFile.getContentType()+"\r\n\r\n");
outStream.write(fileEntity.toString().getBytes());
if(uploadFile.getInStream()!=null){
byte[] buffer = new byte[1024];
int len = 0;
while((len = uploadFile.getInStream().read(buffer, 0, 1024))!=-1){
outStream.write(buffer, 0, len);
}
uploadFile.getInStream().close();
}else{
outStream.write(uploadFile.getData(), 0, uploadFile.getData().length);
}
outStream.write("\r\n".getBytes());
}
}
//下面发送数据结束标志，表示数据已经结束
outStream.write(endline.getBytes());
BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
if(reader.readLine().indexOf("200")==-1){//读取web服务器返回的数据，判断请求码是否为200，如果不是200，代表请求失败
return false;
}
outStream.flush();
outStream.close();
reader.close();
socket.close();
return true;
}