断点续传

来源：互联网发布：淘宝网秒杀购物编辑：程序博客网时间：2024/06/05 10:28
最近项目中用到了断点续传的功能把代码贴在这儿有需要的可以自取
public class FileBiz {        int legth = 0;    InputStream in = null;    RandomAccessFile randomAccessFile ;    int chunks=1;//这是切片的数量默认为1    String fileType;//后缀    String code ;//这是随机码    int pos=0;//这是标示现在上传到哪个位置的标识符    //code 是随机码    YiErMerEvent.HttpEvent message =null;    /**     * 申请上传一个文件     * api会自动检测是否以前上传过该文件(以文件的md5作为标识,和文件名等无关)     * @method POST     * param md5     * param size int 文件大小     * param chunks int 切片的总数量     * param suffix string 文件后缀     * param type int 1普通图片2证件图片     * @url upload-apply     * @return string     * @status 200|401|500     * @format     * [     *      'id'=>string(随机标识码,每次上传文件切片需要携带,服务器以该标识码辨识是哪个文件的切片)     *      'uploaded'=>0|1 int 文件是否在服务器存在 0 不存在需要上传 1 已经存在不需要上传     *      'path'=>string 如果uploaded是1 该变量存储了图片路径 如果uploaded是0 该变量为空     *     */    public void upLoadApply(final int type, final String path, final YiErMerEvent.HttpEvent httpEvent) {        final File file;        if(httpEvent!=null){            message=httpEvent;        }        final byte[] tempbyte = new byte[1024*512];        file = new File(path);        StringRequest request = new StringRequest(Request.Method.POST, Url.UPLODEAPPLY, new Response.Listener<String>() {            @Override            public void onResponse(String s) {                try {                    JSONObject jsonObject =new JSONObject(s.toString());                    if(jsonObject.getInt("status")==200){                        JSONObject jsonObject1=new JSONObject(jsonObject.getString("result").toString());                        code=jsonObject1.getString("code");                        //文件大小小于1MB不需要切片上传的情况                        if(chunks==1){                        }                        new Thread() {                            @Override                            public void run() {                                super.run();                                Looper.prepare();                                try {                                    uploadThread();                                } catch (IOException e) {                                    e.printStackTrace();                                }                                Looper.loop();                            }                            private void uploadThread() throws IOException {                                int elseLenth=legth-(pos*1024*512);                                System.out.println("ceshi----pos------   "+pos);                                randomAccessFile = new RandomAccessFile(path, "rw");                                randomAccessFile.seek(pos*1024*512);//将文件流的位置移动到pos字节处                                //用于保存实际读取的字节数                                AjaxParams params = new AjaxParams();                                final ByteArrayInputStream stream ;                                if(elseLenth<1024*512){                                    byte[] tempbyteforelse=new byte[elseLenth];                                    randomAccessFile.read(tempbyteforelse);                                    System.out.println("ceshi----tempbyteforelselenth------   "+tempbyteforelse.length);                                    System.out.println("ceshi----tempbyteforelselenth------   "+ Arrays.toString(tempbyteforelse));                                    stream = new ByteArrayInputStream(tempbyteforelse);                                    params.put("file", stream,String.valueOf(pos+1),"video/mp4"); // 提交字节流                                }else{                                    randomAccessFile.read(tempbyte);                                    System.out.println("ceshi----tempbytelenth------   "+tempbyte.length);                                    System.out.println("ceshi----tempbyteforelselenth------   "+ Arrays.toString(tempbyte));                                    stream = new ByteArrayInputStream(tempbyte);                                    params.put("file", stream,String.valueOf(pos+1),"video/mp4");// 提交字节流                                }                                FinalHttp fh = new FinalHttp();                                fh.addHeader("token" , ShopApp.token);                                fh.post(Url.UPLODEFILE+code, params, new AjaxCallBack<String>() {                                    @Override                                    public void onLoading(long count, long current) {                                    }                                    @Override                                    public void onSuccess(String o) {                                        super.onSuccess(o);                                        try {                                            stream.close();                                        } catch (IOException e) {                                            e.printStackTrace();                                        }                                        try {                                            JSONObject jsonObject = new JSONObject(o);                                            if (pos >= chunks) {                                                //传入数据  一次传完                                                UplodeFinish(code);                                                in.close();                                                sessionId = "";                                            } else {                                                pos++;                                                uploadThread();                                            }                                        } catch (Exception e) {                                            e.printStackTrace();                                        }                                    }                                });                            }                        }.start();                    }                } catch (JSONException e) {                    e.printStackTrace();                }            }        }, new Response.ErrorListener() {            @Override            public void onErrorResponse(VolleyError volleyError) {                System.out.println(volleyError);            }        }) {            @Override            public Map<String, String> getHeaders() throws AuthFailureError {                Map<String, String> header = new HashMap<>();                header.put("token", ShopApp.token);                return header;            }            @Override            protected Map<String, String> getParams() throws AuthFailureError {                String fileName=file.getName();                String[] suffixs = fileName.split("\\.");                fileType = suffixs[1];                Map<String, String> params = new HashMap<>();                params.put("md5", MD5.getFileMD5(file));                params.put("suffix", fileType);                params.put("type", String.valueOf(type));                chunks=((int)FileSizeUtil.getFileSize(file)/(1024*512));                legth=(int)FileSizeUtil.getFileSize(file);                params.put("chunks", String.valueOf(chunks+1));                System.out.println("ceshi----chunks------   "+chunks);                params.put("size",  String.valueOf((int)FileSizeUtil.getFileSize(file)));                return params;            }        };        mQueue.add(request);    }    /**     * 上传完成后调用服务器接口完成上传     * type用处(register|login|resetpwd)     */    public void UplodeFinish(final String code) {        iStringRequest request = new iStringRequest(Request.Method.PUT,                Url.UPLODEFHINIS+code,                new Response.Listener<String>() {                    @Override                    public void onResponse(String response) {                        message.what = 1;                        try {                            JSONObject jsonObject =new JSONObject(response.toString());                            System.out.println("ceshi----finish------   "+jsonObject.get("status"));                        } catch (JSONException e) {                            e.printStackTrace();                        }                        EventBus.getDefault().post(message);                    }                },                new Response.ErrorListener() {                    @Override                    public void onErrorResponse(VolleyError volleyError) {                        message.what = -1;                        message.errorCode = volleyError.networkResponse.statusCode;                        EventBus.getDefault().post(message);                    }                }){        }.addHeaders("token", ShopApp.token);        mQueue.add(request);    }}
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