摘要：最近時間在做的項目中需要用到前端上傳服務器第一次做文件上傳的服務器端查了各種資料踩了各種坑記錄一下最終的實現方式一服務器端服務器端使用的是框架文件實現邏輯獲取用戶上傳的文件將文件保存到文件夾保存成功后將文件的索引存入數據庫獲取用戶上傳的文件

最近時間在做的項目中需要用到Android前端上傳服務器,第一次做文件上傳的服務器端,查了各種資料,踩了各種坑,記錄一下最終的實現方式
**一.服務器端**
    服務器端使用的是ssh框架,文件實現邏輯:
        1.獲取用戶上傳的文件
        2.將文件保存到文件夾
        3.保存成功后將文件的索引存入數據庫,
    1.獲取用戶上傳的文件
        完整action如下:
    

public class UploadAction extends ActionSupport implements ModelDriven, ServletResponseAware, ServletRequestAware {
    private HttpServletResponse response;
    private HttpServletRequest request;
    //*********重點******
    // 多文件上傳的文件key,相當于獲取 request.getParameter(key)
    //如果傳入的key不對,上傳的文件為空,報空指針異常,
    private List file;

    private List fileFileName;

    private List fileContentType;

    private List dataUrl;

    public void setDataUrl(List dataUrl) {
        this.dataUrl = dataUrl;
    }

    public List getFile() {
        return file;
    }

    public void setFile(List file) {
        this.file = file;
    }

    public List getFileFileName() {
        return fileFileName;
    }

    public void setFileFileName(List fileFileName) {
        this.fileFileName = fileFileName;
    }

    public List getFileContentType() {
        return fileContentType;
    }

    public void setFileContentType(List fileContentType) {

        this.fileContentType = fileContentType;
    }

    private QualityBean bean = new QualityBean();

    public void setBean(QualityBean bean) {
        this.bean = bean;
    }

    public String upload() throws Exception {
        dataUrl = new ArrayList();
        String imgpath = "D:/loadtest";
        System.out.println("file-size" + file.size());
        if (file != null) {
            for (int i = 0; i < file.size(); ++i) {
                InputStream is = new FileInputStream(file.get(i));
                dataUrl.add(imgpath + this.getFileFileName().get(i));
                File destFile = new File(imgpath, this.getFileFileName().get(i));
                OutputStream os = new FileOutputStream(destFile);
                byte[] buffer = new byte[400];
                int length = 0;
                while ((length = is.read(buffer)) > 0) {
                    os.write(buffer, 0, length);
                }
                is.close();
                os.close();
                //往數據庫添加--略
                //返回數據,真實項目中返回自己邏輯判斷
                BooleanBean bean = new BooleanBean();
                bean.setUpdate(true);
                DataUtils.writeBeanDate(response, bean);
              
            }
        }
        return null;
    }

    @Override
    public void setServletRequest(HttpServletRequest httpServletRequest) {
        this.request = httpServletRequest;
    }

    @Override
    public void setServletResponse(HttpServletResponse httpServletResponse) {
        this.response = httpServletResponse;
    }

    @Override
    public QualityBean getModel() {
        return bean;
    }
}

structs.xml配置如下

    
    
    
    
        
            upload
        
        
            
            
                
                104857600
                
            
            
            
        
    

如果報錯如下,則是上傳文件超過設置的大小,

**二.Android 端代碼實現**

        final List list = new ArrayList<>();
        list.add("/storage/emulated/0/Boohee/1565153408424.jpg");
        list.add("/storage/emulated/0/Boohee/1564797245581.jpg");
        submit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Map params = new HashMap<>();
                RequestBody pictureNameBody = RequestBody.create(MediaType.parse("multipart/form-data"), "file");
                for (String str : list) {
                    File picture = new File(str);
                    RequestBody requestFile = RequestBody.create(MediaType.parse("multipart/form-data"), picture);
                    params.put("file"; filename="" + picture.getName() + "", requestFile);
                }
                mvpPresenter.submit("韶關1店",pictureNameBody, params);
            }
        });

上面file作為文件上傳的key,兩端必須保持一致