ANDROID批量文件上传(附Demo文件)

前言

此篇主要介绍android的批量文件上传(从相册选择图片并上传)。

客户端采用HttpClient和Http协议共2种上传方式。

服务端采用Spring MVC接收批量文件上传。

ANDROID客户端

1、HttpClient方式上传

准备文件

httpmime-4.1.1.jar  (源码里面libs文件夹下)

代码中需要使用到此jar文件中的MultipartEntity类。这是Apache的一个jar包，不是android自带的。

 代码

//网络请求需要开启新的线程，不能在主线程中操作
Runnable multiThread = new Runnable() {

@Override
public void run() {
try {
multiUploadFile1();
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

public void multiUploadFile1 () throws UnsupportedEncodingException {
//HttpClient对象
HttpClient httpClient = new DefaultHttpClient();
//采用POST的请求方式
//这是上传服务地址http://10.0.2.2:8080/WebAppProject/main.do?method=upload2
HttpPost httpPost = new HttpPost("http://10.0.2.2:8080/WebAppProject/main.do?method=upload2");
//MultipartEntity对象，需要httpmime-4.1.1.jar文件。
MultipartEntity multipartEntity = new MultipartEntity();
//StringBody对象，参数
StringBody param = new StringBody("参数内容");
multipartEntity.addPart("param1",param);
//filesPath为List<String>对象，里面存放的是需要上传的文件的地址
for (String path:filesPath) {
//FileBody对象，需要上传的文件
ContentBody file = new FileBody( new File(path));
multipartEntity.addPart("file",file);
}
//将MultipartEntity对象赋值给HttpPost
httpPost.setEntity(multipartEntity);
HttpResponse response = null;
try {
//执行请求，并返回结果HttpResponse
response = httpClient.execute(httpPost);
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
//上传成功后返回
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
System.out.println("-->success");
} else {
System.out.println("-->failure");
}
}
｝；

运行很简单：

new Thread(multiThread).start();

2、HTTP协议上传

此种方式在网上也很多，下面的HTTP协议部分的代码是从网上Copy的。

public static String post(String path, Map<String, String> params, FormFile[] files,Handler handler) throws Exception{
try {
final String BOUNDARY = "---------------------------7da2137580612"; //数据分隔线
final String endline = "--" + BOUNDARY + "--\r\n";//数据结束标志
int fileDataLength = 0;	//文件长度
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){
if (uploadFile.getFile() != null) {
fileDataLength += uploadFile.getFile().length();
} else {
fileDataLength += uploadFile.getFileSize();
}
}else{
fileDataLength += uploadFile.getData().length;
}
}
StringBuilder textEntity = new StringBuilder();
for (Map.Entry<String, String> 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);
Log.i("hbgz", "socket connected is " + socket.isConnected());
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());
int lenTotal = 0;
//把所有文件类型的实体数据发送出来
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());
InputStream is = uploadFile.getInStream();
if(is!=null) {
byte[] buffer = new byte[1024];
int len = 0;
while((len = is.read(buffer, 0, 1024))!=-1){
outStream.write(buffer, 0, len);
lenTotal += len;	//每次上传的长度
Message message = new Message();
message.arg1 = 11;
message.obj = lenTotal;
handler.sendMessage(message);
}
is.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()));
String str = "";
boolean requestCodeSuccess = false;
boolean uploadSuccess = false;
int indexResult = 1;
while((str = reader.readLine()) != null) {
Log.d("yjw", "upload--->str=" + str);
if (indexResult == 1) {
if (str.indexOf("200") > 0) {
requestCodeSuccess = true;
}
}
if (indexResult == 6) {
if ("true".equals(str.trim())) {
uploadSuccess = true;
}
}

if (requestCodeSuccess && uploadSuccess) {

outStream.flush();
if(null != socket && socket.isConnected())
{
socket.shutdownInput();
socket.shutdownOutput();
}
outStream.close();
reader.close();
socket.close();
return str.trim();
} else if (indexResult == 6) {
outStream.flush();
if(null != socket && socket.isConnected())
{
socket.shutdownInput();
socket.shutdownOutput();
}
outStream.close();
reader.close();
socket.close();
return str.trim();
}
++indexResult;
}
outStream.flush();

if(null != socket && socket.isConnected())
{
socket.shutdownInput();
socket.shutdownOutput();
}
outStream.close();
reader.close();
socket.close();
return null;
} catch(Exception e) {
e.printStackTrace();
return null;
}
}

FormFile类：

/**
* 上传文件
*/
public class FormFile {
/* 上传文件的数据 */
private byte[] data;
private InputStream inStream;
private File file;
//上传文件大小
private int fileSize;
/* 上传文件名称，可以作为服务器上显示的文件名称*/
private String filename;
/* 请求参数名称 <input type="file" name="file" /> 对应的是input中的name*/
private String parameterName;
/* 内容类型 */
private String contentType = "application/octet-stream";

public FormFile(String filname, File file, String parameterName, String contentType) {
this.filename = filname;
this.parameterName = parameterName;
this.file = file;
if (this.file == null) {
throw new NullPointerException("file 不能为空");
}
if(contentType!=null) this.contentType = contentType;
}

public int getFileSize() {
return fileSize;
}

public File getFile() {
return file;
}

public InputStream getInStream() {
if (inStream != null) {
try {
inStream.close();
inStream = null;
} catch (IOException e) {
e.printStackTrace();
}
}
try {
this.inStream = new FileInputStream(file);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
return inStream;
}

public byte[] getData() {
return data;
}

public String getFilname() {
return filename;
}

public void setFilname(String filname) {
this.filename = filname;
}

public String getParameterName() {
return parameterName;
}

public void setParameterName(String parameterName) {
this.parameterName = parameterName;
}

public String getContentType() {
return contentType;
}

public void setContentType(String contentType) {
this.contentType = contentType;
}

}

调用方式：

/**
* 上传图片到服务器，此段代码需要在新线程中运行
*
* @param formFiles FormFile数组。
*/
public String uploadFile(FormFile[] formFiles) {
try {
//请求普通信息
Map<String, String> params = new HashMap<String, String>();
params.put("method", "upload");
//如果是本机使用10.0.2.2
String result = SocketHttpRequester.post("http://10.0.2.2:8080/WebAppProject/main.do", params, formFiles,mHandler);
return result;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}

JAVA服务端

采用的Spring MVC的方式。在springmvc-servlet.xml文件中需要加入下面代码：

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- 解析request的编码 ，Default is ISO-8859-1 -->
<property name="defaultEncoding">
<value>UTF-8</value>
</property>
</bean>

Spring MVC其他的基本配置就不在这里多说了。不清楚的可以看源码，并在网上找资料查看。

用于接收上传文件的Controller代码如下：

@Controller
@RequestMapping("/main.do")
public class MainController {

@RequestMapping(params="method=upload")
public String uploadFile(MultipartHttpServletRequest request) {
System.out.println("--->uploadFile");
//1、此种方式不需要知道input的name值----下面方法2的“file”值，方法1不需要知道是多少
MultiValueMap<String,MultipartFile> multiMap = request.getMultiFileMap();
Set<String> keys = multiMap.keySet();
for (String key:keys) {
List<MultipartFile> mutiFile = multiMap.get(key);
writeFileToDisk(mutiFile);
}

//2、request.getFiles("file")
//其中的"file"是<input type="file" name="file" />中的name值
//或者是android代码中HTTP协议上传的FormFile.parameterName值
//或者是android代码中的HttpClient中的multipartEntity.addPart("file",file);
//		List<MultipartFile> fileList = request.getFiles("file");
//		writeFileToDisk(fileList);

//跳转的网页，对应success.jsp
return "success";
}

private void writeFileToDisk(List<MultipartFile> fileList) {
for (MultipartFile file : fileList) {
InputStream is = null;
FileOutputStream fos = null;
try {
System.out.println("--->"+file.getSize());
is =  file.getInputStream();
fos = new FileOutputStream("D:/a/"+System.currentTimeMillis()+".png");

byte[] buffer = new byte[1024];
int len=0;
while ((len = is.read(buffer)) != -1) {
fos.write(buffer, 0, len);
}
fos.flush();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (fos != null) {
fos.close();
}
if (is != null) {
is.close();
}
} catch (IOException e) {
e.printStackTrace();
}

}
}
}
}

附上JSP上传的代码(源码中的upload.jsp)：

<form action="main.do?method=upload" method="post" enctype="multipart/form-data">
Upload1:<input type="file" name="file" /><br/>
Upload2:<input type="file" name="file" /><br/>
<input type="submit" title="upload" />
</form>

以上需要注意的是android客户段代码中什么属性值和JSP中的参数对应-----这个在代码注释中有强调。

源码地址：android批量文件上传Demo

Demo中是从相册选择图片上传，因为各个版本的android系统原因，在打开相册获取图片的方法写的比较全(此处代码也有点多)。需要的也可以直接拷贝使用。