android通過servlet上傳檔案到伺服器
阿新 • • 發佈：2019-01-29
伺服器端：部署在Tomcat上，直接在myEclipse上開發即可
手機端：package com; import java.io.BufferedInputStream; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.PrintWriter; import java.text.SimpleDateFormat; import java.util.Date; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; public class upload extends HttpServlet { private String transerFileName ; /** * Constructor of the object. */ public upload() { super(); } /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request * the request send by the client to the server * @param response * the response send by the server to the client * @throws ServletException * if an error occurred * @throws IOException * if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">"); out.println("<HTML>"); out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>"); out.println(" <BODY>"); out.print(" This is "); out.print(this.getClass()); out.println(", using the GET method"); out.println(" </BODY>"); out.println("</HTML>"); out.flush(); out.close(); } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to * post. * * @param request * the request send by the client to the server * @param response * the response send by the server to the client * @throws ServletException * if an error occurred * @throws IOException * if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); // /response.setHeader("Content-Type", // "application/x-www-form-urlencoded; charset=GBK"); PrintWriter out = response.getWriter(); request.setCharacterEncoding("utf-8");////這句至關重要，不然中文的檔名稱顯示亂碼 // 建立檔案專案工廠物件 DiskFileItemFactory factory = new DiskFileItemFactory(); // 設定檔案上傳路徑 //String upload = this.getServletContext().getRealPath("/upload/"); String upload="F:\\upload"; // 獲取系統預設的臨時檔案儲存路徑，該路徑為Tomcat根目錄下的temp資料夾 // String temp = System.getProperty("java.io.tmpdir"); // 設定緩衝區大小為 500M factory.setSizeThreshold(1024 * 1024 * 500);// //緩衝區設定太大會上傳失敗 // 設定臨時資料夾為temp // factory.setRepository(new File(temp)); factory.setRepository(new File(upload)); // 用工廠例項化上傳元件,ServletFileUpload 用來解析檔案上傳請求 ServletFileUpload servletFileUpload = new ServletFileUpload(factory); // 解析結果放在List中 List<FileItem> list; try { list = servletFileUpload.parseRequest(request); for (FileItem item : list) { String name = item.getFieldName(); InputStream is = item.getInputStream(); if (name.contains("file")) { try { InputStream input = item.getInputStream(); String itemName = item.getName(); String fileName = itemName.substring( itemName.lastIndexOf("\\") + 1, itemName.length()); FileOutputStream output = new FileOutputStream( new File( "F:\\upload\\" + fileName)); byte[] buf = new byte[102400]; int length = 0; while ((length = input.read(buf)) != -1) { output.write(buf, 0, length); } input.close(); output.close(); } catch (Exception e) { e.printStackTrace(); } out.write("success"); out.flush(); out.close(); }// / if (name.contains("file")) }// /for } catch (FileUploadException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } /** * Initialization of the servlet. <br> * * @throws ServletException * if an error occurs */ public void init() throws ServletException { // Put your code here } }
package com.example; import java.io.File; import java.io.FileNotFoundException; import java.io.UnsupportedEncodingException; import org.apache.http.client.methods.HttpPost; import android.app.Activity; import android.os.Bundle; import android.os.Environment; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; import com.loopj.android.http.AsyncHttpClient; import com.loopj.android.http.AsyncHttpResponseHandler; import com.loopj.android.http.RequestParams; public class MainActivity extends Activity { private TextView uploadInfo; private Button button1; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); uploadInfo = (TextView) findViewById(R.id.upload_info); button1 = (Button) findViewById(R.id.button1); button1.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO 自動生成的方法存根 uploadFile(); } }); }// /onCreate private void uploadFile() { // new Thread(new Runnable() {////不能使用執行緒 // // @Override // public void run() { // TODO 自動生成的方法存根 // 伺服器端地址 String url = "http://192.168.0.105:8080/upload/servlet/upload"; // 手機端要上傳的檔案，首先要儲存你手機上存在該檔案 // String filePath = Environment.getExternalStorageDirectory() + // "/1delete/1.jpg"; // String filePath ="/sdcard/1delete/1.jpg"; ///可以 // String filePath ="/sdcard/11/軟工大作業.ppt";///可以 // String filePath ="/sdcard/音樂/許嵩-千古.mp3";////別忘了/sdcard開頭，，可以 // /String filePath ="/sdcard/相機/22222.mp4"; ///30M 不可以 String filePath = "/sdcard/音樂/愛的勇氣.mp3"; Log.i("filePath", filePath); AsyncHttpClient httpClient = new AsyncHttpClient(); httpClient.setTimeout(60 * 60 * 1000); RequestParams param = new RequestParams(); try { param.put("file", new File(filePath)); httpClient.post(url, param, new AsyncHttpResponseHandler() { @Override public void onStart() { super.onStart(); uploadInfo.setText("正在上傳..."); } @Override public void onSuccess(String arg0) { super.onSuccess(arg0); Log.i("ck", "success>" + arg0); if (arg0.equals("success")) { Toast.makeText(MainActivity.this, "上傳成功！", 1000).show(); } uploadInfo.setText(arg0); } @Override public void onFailure(Throwable arg0, String arg1) { super.onFailure(arg0, arg1); uploadInfo.setText("上傳失敗！"); } }); } catch (FileNotFoundException e) { e.printStackTrace(); Toast.makeText(MainActivity.this, "上傳檔案不存在！", 1000).show(); } // } // }).start(); } }
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /> <!-- 使用網路功能所需許可權 --> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /> <!-- SDK離線地圖和cache功能需要讀寫外部儲存器 --> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <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> </manifest>
