android通过servlet上传文件到服务器
本文实例为大家分享了android通过servlet上传文件到服务器的具体代码，供大家参考，具体内容如下
服务器端：部署在Tomcat上，直接在myEclipse上开发即可
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');////这句至关重要，不然中文的文件名称显示乱码 // 创建文件项目工厂对象 DiskFileItemFactory factory = new DiskFileItemFactory(); // 设置文件上传路径 //String upload = this.getServletContext().getRealPath('/upload/'); String upload='F:upload'; // 获取系统默认的临时文件保存路径，该路径为Tomcat根目录下的temp文件夹 // String temp = System.getProperty('java.io.tmpdir'); // 设置缓冲区大小为 500M factory.setSizeThreshold(1024 * 1024 * 500);// //缓冲区设置太大会上传失败 // 设置临时文件夹为temp // factory.setRepository(new File(temp)); factory.setRepository(new File(upload)); // 用工厂实例化上传组件,ServletFileUpload 用来解析文件上传请求 ServletFileUpload servletFileUpload = new ServletFileUpload(factory); // 解析结果放在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 } }
手机端：
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 自动生成的方法存根 uploadFile(); } }); }// /onCreate private void uploadFile() { // new Thread(new Runnable() {////不能使用线程 // // @Override // public void run() { // TODO 自动生成的方法存根 // 服务器端地址 String url = 'http://192.168.0.105:8080/upload/servlet/upload'; // 手机端要上传的文件，首先要保存你手机上存在该文件 // String filePath = Environment.getExternalStorageDirectory() + // '/1delete/1.jpg'; // String filePath ='/sdcard/1delete/1.jpg'; ///可以 // String filePath ='/sdcard/11/软工大作业.ppt';///可以 // String filePath ='/sdcard/音乐/许嵩-千古.mp3';////别忘了/sdcard开头，，可以 // /String filePath ='/sdcard/相机/22222.mp4'; ///30M 不可以 String filePath = '/sdcard/音乐/爱的勇气.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('正在上传...'); } @Override public void onSuccess(String arg0) { super.onSuccess(arg0); Log.i('ck', 'success>' + arg0); if (arg0.equals('success')) { Toast.makeText(MainActivity.this, '上传成功！', 1000).show(); } uploadInfo.setText(arg0); } @Override public void onFailure(Throwable arg0, String arg1) { super.onFailure(arg0, arg1); uploadInfo.setText('上传失败！'); } }); } catch (FileNotFoundException e) { e.printStackTrace(); Toast.makeText(MainActivity.this, '上传文件不存在！', 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' /> <!-- 使用网络功能所需权限 --> <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离线地图和cache功能需要读写外部存储器 --> <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>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持好吧啦网。
相关文章：
1. Admin - SpringBoot + Maven 多启动环境配置实例详解2. Android WebView通过动态的修改js去拦截post请求参数实例3. SpringBoot2整合Ehcache组件实现轻量级缓存管理4. Android自定义View实现气泡动画5. Django Form设置文本框为readonly操作6. 如何用python写个模板引擎7. django中嵌套的try-except实例8. 浅谈vue实现双向事件绑定v-model的原理9. Django def clean()函数对表单中的数据进行验证操作10. spring boot集成mongodb的增删改查的示例代码
网公网安备