Android   发布时间:2022-04-28  发布网站:大佬教程  code.js-code.com
大佬教程收集整理的这篇文章主要介绍了Android实现上传文件到服务器实例详解大佬教程大佬觉得挺不错的,现在分享给大家,也给大家做个参考。

本实例实现每隔5秒上传一次,通过服务器端获取手机上传过来的文件信息并做相应处理;采用Android+Struts2技术。

一、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:

Android实现上传文件到服务器实例详解

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 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,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,1024))!=-1){
           outStream.write(buffer,len);
         }
         uploadFile.getinstream().close();
       }else{
         outStream.write(uploadFile.getData(),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,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,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://scheR_780_11845@as.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> 

启动模拟器,运行如下:

Android实现上传文件到服务器实例详解

二、服务器端用来获取Android端上传过来的文件信息

1)、新建一个web项目命名为upload,目录结构如下

Android实现上传文件到服务器实例详解

注意:记得加入struts2 jar包,需加入的jar如下

Android实现上传文件到服务器实例详解

2)、新建action类,命名为UploadAction,内容如下

package com.ljq.action;

import java.io.File;
import java.io.FileInputStream;
import java.io.FiLeoutputStream;
import java.io.IOException;

import javax.servlet.http.httpServletrequest;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

/**
 * 获取Android端上传过来的信息
 * 
 * @author Administrator
 *
 */
@SuppressWarnings("serial")
public class UploadAction extends ActionSupport {
  // 上传文件域
  private File image;
  // 上传文件类型
  private String imageContentType;
  // 封装上传文件名
  private String imageFilename;
  // 接受依赖注入的属性
  private String savePath;

  @Override
  public String execute() {
    httpServletrequest request=ServletActionContext.getrequest();
    FiLeoutputStream fos = null;
    FileInputStream fis = null;
    try {
      System.out.println("获取Android端传过来的普通信息:");
      System.out.println("用户名:"+request.getParameter("username"));
      System.out.println("密码:"+request.getParameter("pwd"));
      System.out.println("年龄:"+request.getParameter("age"));
      System.out.println("文件名:"+request.getParameter("filename"));
      System.out.println("获取Android端传过来的文件信息:");
      System.out.println("文件存放目录: "+getSavePath());
      System.out.println("文件名称: "+imageFileName);
      System.out.println("文件大小: "+image.length());
      System.out.println("文件类型: "+imageContentTypE);
      
      fos = new FiLeoutputStream(getSavePath() + "/" + getImageFilename());
      fis = new FileInputStream(getImage());
      byte[] buffer = new byte[1024];
      int len = 0;
      while ((len = fis.read(buffer)) != -1) {
        fos.write(buffer,len);
      }
      System.out.println("文件上传成功");
    } catch (Exception E) {
      System.out.println("文件上传失败");
      e.printStackTrace();
    } finally {
      close(fos,fis);
    }
    return succesS;
  }

  /**
   * 文件存放目录
   * 
   * @return
   */
  public String getSavePath() throws Exception{
    return ServletActionContext.getServletContext().getRealPath(savePath); 
  }

  public void setSavePath(String savePath) {
    this.savePath = savePath;
  }

  public File getImage() {
    return image;
  }

  public void setImage(File imagE) {
    this.image = image;
  }

  public String getImageContentType() {
    return imageContentType;
  }

  public void setImageContentType(String imageContentTypE) {
    this.imageContentType = imageContentType;
  }

  public String getImageFilename() {
    return imageFilename;
  }

  public void setImageFilename(String imageFileName) {
    this.imageFilename = imageFilename;
  }

  private void close(FiLeoutputStream fos,FileInputStream fis) {
    if (fis != null) {
      try {
        fis.close();
        fis=null;
      } catch (IOException E) {
        System.out.println("FileInputStream关闭失败");
        e.printStackTrace();
      }
    }
    if (fos != null) {
      try {
        fos.close();
        fis=null;
      } catch (IOException E) {
        System.out.println("FiLeoutputStream关闭失败");
        e.printStackTrace();
      }
    }
  }

}

3)、配置struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
  "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
  "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
  <!-- 该属性指定需要Struts2处理的请求后缀,该属性认值是action,即所有匹配*.action的请求都由Struts2处理。
    如果用户需要指定多个请求后缀,则多个后缀之间以英文逗号(,)隔开。 -->
  <constant name="struts.action.extension" value="do"/>
  <!-- 设置浏览器是否缓存静态内容,认值为true(生产环境下使用),开发阶段最好关闭 -->
  <constant name="struts.serve.static.browserCache" value="false"/>
  <!-- 当struts的配置文件修改后,系统是否自动重新加载该文件,认值为false(生产环境下使用),开发阶段最好打开 -->
  <constant name="struts.configuration.xml.reload" value="true"/>
  <!-- 开发模式下使用,这样可以打印出更详细的错误信息 -->
  <constant name="struts.devMode" value="true"/>
  <!-- 认的视图主题 -->
  <constant name="strutS.Ui.theme" value="simple"/>
  <!--<constant name="struts.objectFactory" value="spring" />-->
  <!--解决乱码  -->
  <constant name="struts.i18n.encoding" value="UTF-8"/>
  <!-- 指定允许上传文件最大字节数。认值是2097152(2M) -->
  <constant name="struts.multipart.maxSize" value="22097152"/>
  <!-- 设置上传文件的临时文件夹,认使用javax.servlet.context.tempdir -->
  <constant name="struts.multipart.saveDir " value="d:/tmp"/>
  
  <package name="upload" namespace="/upload" extends="struts-default">
    <action name="execute" class="com.ljq.action.UploadAction">
      <!-- 动态设置savePath的属性值 -->
      <param name="savePath">/image</param>
      <result name="success">/WEB-INF/page/message.jsp</result>
    </action>
  </package>
</struts>

4)、配置web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
  xmlns:xsi="http://www.w3.org/2001/XMLscheR_780_11845@a-instance"
  xsi:scheR_780_11845@aLOCATIOn="http://java.sun.com/xml/ns/j2ee 
  http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

  <filter>
    <filter-name>struts2</filter-name>
    <filter-class>
      org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
    </filter-class>
  </filter>
  <filter-mapping>
    <filter-name>struts2</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  
  <filter>
    <filter-name>strutsCleanup</filter-name>
    <filter-class>
      org.apache.struts2.dispatcher.ActionContextCleanUp
    </filter-class>
  </filter>
  <filter-mapping>
    <filter-name>strutsCleanup</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

运行结构如下:

获取Android端传过来的普通信息:
用户名张三
密码:zhangsan
年龄:21
文件名:123.rmvb
获取Android端传过来的文件信息:
文件存放目录: D:\apache-tomcat-6.0.18\webapps\upload\image
文件名称: 123.rmvb
文件大小: 3962649
文件类型: application/octet-stream
文件上传成功

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编程小技巧。

大佬总结

以上是大佬教程为你收集整理的Android实现上传文件到服务器实例详解全部内容,希望文章能够帮你解决Android实现上传文件到服务器实例详解所遇到的程序开发问题。

如果觉得大佬教程网站内容还不错,欢迎将大佬教程推荐给程序员好友。

本图文内容来源于网友网络收集整理提供,作为学习参考使用,版权属于原作者。
如您有任何意见或建议可联系处理。小编QQ:384754419,请注明来意。