Android 上传文件到服务器
Posted Andy24
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了Android 上传文件到服务器相关的知识，希望对你有一定的参考价值。
android端实现文件上传
1)、新建一个Android项目命名为androidUpload，目录结构如下：
2)、新建FormFile类，用来封装文件信息
package com.ljq.utils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
/**
* 上传文件
*/
public class FormFile {
/* 上传文件的数据 */
private byte[] data;
private InputStream inStream;
private File file;
/* 文件名称 */
private String filname;
/* 请求参数名称*/
private String parameterName;
/* 内容类型 */
private String contentType = "application/octet-stream";
public FormFile(String filname, byte[] data, String parameterName, String contentType) {
this.data = data;
this.filname = filname;
this.parameterName = parameterName;
if(contentType!=null) this.contentType = contentType;
}
public FormFile(String filname, File file, String parameterName, String contentType) {
this.filname = filname;
this.parameterName = parameterName;
this.file = file;
try {
this.inStream = new FileInputStream(file);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
if(contentType!=null) this.contentType = contentType;
}
public File getFile() {
return file;
}
public InputStream getInStream() {
return inStream;
}
public byte[] getData() {
return data;
}
public String getFilname() {
return filname;
}
public void setFilname(String filname) {
this.filname = 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;
}
}
3）、新建SocketHttpRequester类，封装上传文件到服务器代码
package com.ljq.utils;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.net.URL;
import java.util.Map;
/**
* 上传文件到服务器
*
* @author Administrator
*
*/
public class SocketHttpRequester {
/**
* 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:
* <FORM METHOD=POST ACTION="http://192.168.1.101:8083/upload/servlet/UploadServlet" enctype="multipart/form-data">
<INPUT TYPE="text" NAME="name">
<INPUT TYPE="text" NAME="id">
<input type="file" name="imagefile"/>
<input type="file" name="zip"/>
</FORM>
* @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.iteye.cn或http://192.168.1.101:8083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
*/
public static boolean post(String path, Map<String, String> 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;
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();
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);
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
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;
}
/**
* 提交数据到服务器
* @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
*/
public static boolean post(String path, Map<String, String> params, FormFile file) throws Exception{
return post(path, params, new FormFile[]{file});
}
}
4)、新建MainActivity类，实现每隔5秒上传一次
package com.ljq.activity;
import java.io.File;
import java.util.HashMap;
import java.util.Map;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.util.Log;
import com.ljq.utils.FormFile;
import com.ljq.utils.SocketHttpRequester;
public class MainActivity extends Activity {
private File file;
private Handler handler;
private static final String TAG="MainActivity";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Log.i(TAG, "onCreate");
file = new File(Environment.getExternalStorageDirectory(), "123.rmvb");
Log.i(TAG, "照片文件是否存在："+file);
handler=new Handler();
handler.post(runnable);
}
Runnable runnable=new Runnable() {
public void run() {
Log.i(TAG, "runnable run");
uploadFile(file);
handler.postDelayed(runnable, 5000);
}
};
/**
* 上传图片到服务器
*
* @param imageFile 包含路径
*/
public void uploadFile(File imageFile) {
Log.i(TAG, "upload start");
try {
String requestUrl = "http://192.168.1.101:8083/upload/upload/execute.do";
//请求普通信息
Map<String, String> params = new HashMap<String, String>();
params.put("username", "张三");
params.put("pwd", "zhangsan");
params.put("age", "21");
params.put("fileName", imageFile.getName());
//上传文件
FormFile formfile = new FormFile(imageFile.getName(), imageFile, "image", "application/octet-stream");
SocketHttpRequester.post(requestUrl, params, formfile);
Log.i(TAG, "upload success");
} catch (Exception e) {
Log.i(TAG, "upload error");
e.printStackTrace();
}
Log.i(TAG, "upload end");
}
}
5)、修改清单文件
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.ljq.activity"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".MainActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-sdk android:minSdkVersion="4" />
<uses-permission android:name="android.permission.INTERNET" />
</manifest>
以上是关于Android 上传文件到服务器的主要内容，如果未能解决你的问题，请参考以下文章
Android端通过HttpURLConnection上传文件到服务器