Android 图片或者文件上传服务器（Android+Struts2）

来源：互联网发布：知乎周刊 mobi下载编辑：程序博客网时间：2024/05/16 01:29

在很多时候都遇到了客户端需要向服务器上传文件，但是网上的资料很多，但是仅仅只是说了手机上如何上传服务器，而服务器端没有描述。回过头来，其实无论是手机还是网页上，上传文件，其本质都是一样，这里我主要是使用http协议来进行上传。而服务器端，和普通的网页上传均是一样的的.。下面贴出代码。以后好用。。。这里的Android端代码Copy别人，忘记是哪位大神的了，不好意思。

首先是Android端：
1. 上传工具类

    package com.bruce.deiv.mobilesell.utils;import android.util.Log;import java.io.DataOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import java.util.Map;import java.util.UUID;/** * Created by bruce on 15/5/9. */public class FileUpload {private static final String TAG = "uploadFile";private static final int TIME_OUT = 10 * 1000; // 超时时间private static final String CHARSET = "utf-8"; // 设置编码/** * Android上传文件到服务端 * * @param file       需要上传的文件 * @param RequestURL 请求的rul * @return 返回响应的内容 */public static String uploadFile(File file, String RequestURL) {    String result = null;    String BOUNDARY = UUID.randomUUID().toString(); // 边界标识 随机生成    String PREFIX = "--", LINE_END = "\r\n";    String CONTENT_TYPE = "multipart/form-data"; // 内容类型    try {        URL url = new URL(RequestURL);        HttpURLConnection conn = (HttpURLConnection) url.openConnection();        conn.setReadTimeout(TIME_OUT);        conn.setConnectTimeout(TIME_OUT);        conn.setDoInput(true); // 允许输入流        conn.setDoOutput(true); // 允许输出流        conn.setUseCaches(false); // 不允许使用缓存        conn.setRequestMethod("POST"); // 请求方式        conn.setRequestProperty("Charset", CHARSET); // 设置编码        conn.setRequestProperty("connection", "keep-alive");        conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY);        if (file != null) {            /**             * 当文件不为空，把文件包装并且上传             */            DataOutputStream dos = new DataOutputStream(conn.getOutputStream());            StringBuffer sb = new StringBuffer();            sb.append(PREFIX);            sb.append(BOUNDARY);            sb.append(LINE_END);            /**             * 这里重点注意： name里面的值为服务端需要key 只有这个key 才可以得到对应的文件             * filename是文件的名字，包含后缀名的 比如:abc.png             */            sb.append("Content-Disposition: form-data; name=\"uploadfile\"; filename=\""                    + file.getName() + "\"" + LINE_END);            sb.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINE_END);            sb.append(LINE_END);            dos.write(sb.toString().getBytes());            InputStream is = new FileInputStream(file);            byte[] bytes = new byte[1024];            int len = 0;            while ((len = is.read(bytes)) != -1) {                dos.write(bytes, 0, len);            }            is.close();            dos.write(LINE_END.getBytes());            byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END).getBytes();            dos.write(end_data);            dos.flush();            /**             * 获取响应码 200=成功 当响应成功，获取响应的流             */            int res = conn.getResponseCode();            Log.e(TAG, "response code:" + res);            // if(res==200)            // {            Log.e(TAG, "request success");            InputStream input = conn.getInputStream();            StringBuffer sb1 = new StringBuffer();            int ss;            while ((ss = input.read()) != -1) {                sb1.append((char) ss);            }            result = sb1.toString();            Log.e(TAG, "result : " + result);            // }            // else{            // Log.e(TAG, "request error");            // }        }    } catch (MalformedURLException e) {        e.printStackTrace();    } catch (IOException e) {        e.printStackTrace();    }    return result;}/** * 通过拼接的方式构造请求内容，实现参数传输以及文件传输 * * @param url    Service net address * @param params text content * @param files  pictures * @return String result of Service response * @throws IOException */public static String post(String url, Map<String, String> params, Map<String, File> files)        throws IOException, IOException {    String BOUNDARY = java.util.UUID.randomUUID().toString();    String PREFIX = "--", LINEND = "\r\n";    String MULTIPART_FROM_DATA = "multipart/form-data";    String CHARSET = "UTF-8";    URL uri = new URL(url);    HttpURLConnection conn = (HttpURLConnection) uri.openConnection();    conn.setReadTimeout(10 * 1000); // 缓存的最长时间    conn.setDoInput(true);// 允许输入    conn.setDoOutput(true);// 允许输出    conn.setUseCaches(false); // 不允许使用缓存    conn.setRequestMethod("POST");    conn.setRequestProperty("connection", "keep-alive");    conn.setRequestProperty("Charsert", "UTF-8");    conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA + ";boundary=" + BOUNDARY);    // 首先组拼文本类型的参数    StringBuilder sb = new StringBuilder();    for (Map.Entry<String, String> entry : params.entrySet()) {        sb.append(PREFIX);        sb.append(BOUNDARY);        sb.append(LINEND);        sb.append("Content-Disposition: form-data; name=\"" + entry.getKey() + "\"" + LINEND);        sb.append("Content-Type: text/plain; charset=" + CHARSET + LINEND);        sb.append("Content-Transfer-Encoding: 8bit" + LINEND);        sb.append(LINEND);        sb.append(entry.getValue());        sb.append(LINEND);    }    DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());    outStream.write(sb.toString().getBytes());    // 发送文件数据    if (files != null)        for (Map.Entry<String, File> file : files.entrySet()) {            StringBuilder sb1 = new StringBuilder();            sb1.append(PREFIX);            sb1.append(BOUNDARY);            sb1.append(LINEND);            sb1.append("Content-Disposition: form-data; name=\"uploadfile\"; filename=\""                    + file.getValue().getName() + "\"" + LINEND);            sb1.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINEND);            sb1.append(LINEND);            outStream.write(sb1.toString().getBytes());            InputStream is = new FileInputStream(file.getValue());            byte[] buffer = new byte[1024];            int len = 0;            while ((len = is.read(buffer)) != -1) {                outStream.write(buffer, 0, len);            }            is.close();            outStream.write(LINEND.getBytes());        }    // 请求结束标志    byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();    outStream.write(end_data);    outStream.flush();    // 得到响应码    int res = conn.getResponseCode();    InputStream in = conn.getInputStream();    StringBuilder sb2 = new StringBuilder();    if (res == 200) {        int ch;        while ((ch = in.read()) != -1) {            sb2.append((char) ch);        }    }    outStream.close();    conn.disconnect();    return sb2.toString();}}

2. 工具类的使用：

class FileUpLoadSync extends AsyncTask<String,Integer,String>{    @Override    protected String doInBackground(String... params) {        final Map<String, String> param = new HashMap<String, String>();        param.put("x", String.valueOf(visiteSure.getX()));        param.put("y", String.valueOf(visiteSure.getY()));        param.put("name",String.valueOf(visiteSure.getName()));        final Map<String, File> files = new HashMap<String, File>();        if(!TextUtils.isEmpty(visiteSure.getPhoto()))        {            files.put("file", new File(visiteSure.getPhoto()));        }        final String request;        try {            request = FileUpload.post(params[0], param, files);        } catch (IOException e) {            e.printStackTrace();            return null;        }        return request;    }}

使用该线程
new FileUpLoadSync().execute(Config.addTaskSure);
3. 接下来是服务器端。

服务器端接受数据需要和参数的名称相同，否则数据是接收不到的，当然也可以使用Request手动接收，那就另当别论了

private String fileContentType;// 封装文件类型private String fileFileName;// 封装文件名private String savePath;// 保存路径private File uploadfile;private String uploadfileContentType;private String uploadfileFileName;这些参数写上get set

主要这里的

    getSavePath(){return ServletActionContext.getServletContext().getRealPath(savePath);}我需要使用绝度路径，不然会出错public void add(){    //从网页接收数据成一个签到对象    //通过service层的方法将新对象加入数据表    System.out.println(sure);

System.out.println(savePath+","+uploadfile+","+uploadfileContentType+","+uploadfileFileName);//查看接收都的参数      //null,null,null,/upload/visitesure,upload/upload_3869a819_887e_4b3c_9df5_3487b67c72ee_00000003.tmp,application/octet-stream; charset=UTF-8,20150509_033126.jpg        try {            if (uploadfile != null) {                String filename = FileUpLoad.fileUpload(uploadfile,                        this.getSavePath(), uploadfileFileName);                sure.setPhoto("upload/visitesure/" + filename);            }        } catch (Exception e) {            e.printStackTrace();        }        visiteTaskSureService.create(sure);    }

Action配置

<action name="visiteTaskSureAction_*" class="visiteTaskSureAction"            method="{1}">            <!-- 配置fileUpload拦截器 -->            <interceptor-ref name="fileUpload">                <!-- 配置允许上传的文件类型 -->    <!--            <param name="allowedTypes">image/x-ms-bmp,image/jpeg,image/g                    if,image/png,image/x-png,application/excel,application/vnd.ms-excel</param> -->                <!-- 配置允许上传的文件大小 -->                <param name="maximumSize">2048000</param>            </interceptor-ref>            <!-- 配置上传文件的保存的相对路径 -->            <param name="savePath">/upload/visitesure</param>            <result name="success">/page/visiteTaskSure/visiteTaskSure_index.jsp</result>

最后是服务器端的上传工具类

package com.tos.utils;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.UUID;import org.apache.commons.io.IOUtils;public class FileUpLoad {    public static String fileUpload(File file, String path, String fileFileName)            throws IOException {        // 读取内容到InputStream        InputStream is = new FileInputStream(file);        String filename = UUID.randomUUID()                + fileFileName.substring(fileFileName.lastIndexOf('.'));        File pathFile = new File(path);        if (!pathFile.exists()) {            pathFile.mkdirs();        }        System.out.println(pathFile.getAbsolutePath());        File fileOT = new File(pathFile,filename);    System.out.println(fileOT.getAbsolutePath());           // 创建输出流，生成新文件        OutputStream os = new FileOutputStream(fileOT);        // 将InputStream里的byte拷贝到OutputStream        IOUtils.copy(is, os);        os.flush();        IOUtils.closeQuietly(is);        IOUtils.closeQuietly(os);        return filename;    }}

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