安卓开发多文件上传Spring MVC作为服务器端

服务器端核心代码：

package com.missionsky.mvc.controller;

import org.apache.commons.fileupload.FileUpload;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.servlet.ServletRequestContext;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

@Controller
@RequestMapping("/upload.do")
public class UploadController {
    @RequestMapping(params = "intent=upload")
    public void uploadFile(HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException {
        int num = 0;
        System.out.println("FileUploadOrLoad");
        // 设置request编码，主要是为了处理普通输入框中的中文问题
        request.setCharacterEncoding("UTF-8");
        // 这里对request进行封装，RequestContext提供了对request多个访问方法
        org.apache.commons.fileupload.RequestContext requestContext = new ServletRequestContext(request);
        // 判断表单是否是Multipart类型的。这里可以直接对request进行判断，不过已经以前的用法了
        if (FileUpload.isMultipartContent(requestContext)) {

            num++;
            DiskFileItemFactory factory = new DiskFileItemFactory();
            // 设置文件的缓存路径
            factory.setRepository(new File("d:/tmp/"));
            File dir = new File("d:\\download");
            System.out.println("dir");

            if (!dir.exists()) {
                dir.mkdirs();
            }
            // System.out.print("已经生成临时文件");

            ServletFileUpload upload = new ServletFileUpload(factory);
            // 设置上传文件大小的上限，-1表示无上限
            upload.setSizeMax(100000 * 1024 * 1024);
            List items = new ArrayList();
            try {
                // 上传文件，并解析出所有的表单字段，包括普通字段和文件字段
                items = upload.parseRequest(request);
            } catch (FileUploadException e1) {
                System.out.println("文件上传发生错误" + e1.getMessage());
            }
            // 下面对每个字段进行处理，分普通字段和文件字段
            Iterator it = items.iterator();


            while (it.hasNext()) {
                DiskFileItem fileItem = (DiskFileItem) it.next();
                // 如果是普通字段
                if (fileItem.isFormField()) {
                    System.out.println(fileItem.getFieldName()
                            + " "
                            + fileItem.getName()
                            + " "
                            + new String(fileItem.getString().getBytes("iso8859-1"), "gbk"));
                } else {
                    System.out.println(fileItem.getFieldName() + " "
                            + fileItem.getName() + " "
                            + fileItem.isInMemory() + " "
                            + fileItem.getContentType() + " "
                            + fileItem.getSize());
                    // 保存文件，其实就是把缓存里的数据写到目标路径下
                    if (fileItem.getName() != null && fileItem.getSize() != 0) {
                        File fullFile = new File(fileItem.getName());
                        File newFile = new File("d:/download/"
                                + fullFile.getName() + num);
                        try {
                            fileItem.write(newFile);
                            // 文件上传成功 跟新数据库任务表    添加对应任务
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    } else {
                        System.out.println("文件没有选择 或 文件内容为空");
                    }
                }
            }

            //上传完毕后手动删除缓存的 文件
            File file = new File("D:/tmp");
            if (file.exists()) {
                File[] listFiles = file.listFiles();
                for (File deleteFile : listFiles) {
                    deleteFile.delete();
                }
            }

            // 设置响应码
            response.setStatus(200);
        }
    }
}

客户端核心代码：

①
new UploadTask("http://192.168.206.125:8080/spring/upload.do?intent=upload", files).execute();


②
private class UploadTask extends AsyncTask<Void, Void, String> {

private String url;
private List<File> files;

public UploadTask(String url, List<File> files) {
// TODO Auto-generated constructor stub
this.url = url;
this.files = files;
        }

        @Override
protected String doInBackground(Void... params) {
// TODO Auto-generated method stub
return uploadFile(url, files);
        }

        @Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);

            Toast.makeText(mActivity, result, Toast.LENGTH_SHORT).show();
        }
    }

    ③
private String uploadFile(String url, List<File> files) {
        HttpClient client=new DefaultHttpClient();// 开启一个客户端 HTTP 请求 
        HttpPost post = new HttpPost(url);//创建 HTTP POST 请求 
        MultipartEntityBuilder builder = MultipartEntityBuilder.create();
// builder.setCharset(Charset.forName("uft-8"));//设置请求的编码格式
        builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);//设置浏览器兼容模式
int count=0;
for (File file:files) {
// FileBody fileBody = new FileBody(file);//把文件转换成流对象FileBody
// builder.addPart("file"+count, fileBody);
            builder.addBinaryBody("file"+count, file);
count++;
        }

        builder.addTextBody("method", "upload");//设置请求参数
        builder.addTextBody("fileTypes", ".pcap");//设置请求参数
        HttpEntity entity = builder.build();// 生成 HTTP POST 实体 
        post.setEntity(entity);//设置请求参数
        HttpResponse response = null;
try {
            response = client.execute(post);
        } catch (ClientProtocolException e) {
// TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
// TODO Auto-generated catch block
            e.printStackTrace();
        }// 发起请求 并返回请求的响应
if (response != null && response.getStatusLine().getStatusCode()==200) {
return "上传成功";
        }
return "上传失败";  
    }

服务器要用到的jar包：

<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>

客户端要用到的jar包：
httpcore-4.3.2.jar
httpmime-4.3.5.jar