Java 서버를 사용하여 이미지 업로드를 처리하는 방법

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
 
import javax.annotation.Resource;
import javax.servlet.ServletInputStream;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
import org.jboss.netty.handler.codec.http.HttpRequest;
import org.springframework.mock.web.MockMultipartFile;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
 
import com.hlinkcloud.ubp.core.constant.RedisKeyConstant;
import com.hlinkcloud.ubp.core.service.RedisService;
import com.hlinkcloud.ubp.core.util.BaseStringUtil;
import com.hlinkcloud.ubp.facade.bean.common.FastDFSFile;
import com.hlinkcloud.ubp.facade.bean.common.FileManagerConfig;
import com.hlinkcloud.ubp.facade.service.common.FileInfoService;
import com.hlinkcloud.ubp.facade.service.permission.UserService;
import com.hlinkcloud.ubp.facade.util.DictionaryCommUtil;
 
import fr.opensagres.xdocreport.core.io.internal.ByteArrayOutputStream;
 
/**
 * 微信上传图片业务
 * 
 * @author FengQi
 *
 */
@Controller
@RequestMapping("/wx_upload")
public class WxUploadImgBusiness {
 
    @Resource
    private UserService userService;
 
    @Resource
    private RedisService redisService;
 
    @Resource(name = "commonUtil")
    private DictionaryCommUtil commUtil;
 
    @Resource
    private FileInfoService fileService; /* 文件服务 */
    
    @RequestMapping("/getUploadFilePath")
    @ResponseBody
    public Map<String, Object> doWxUploadFile(HttpServletRequest request, HttpServletResponse response) {
 
        HashMap<String, Object> map = new HashMap<String, Object>();
        
        try {
            
            /*
             * // 注释:该部分是使用在没有使用sprinvMVC的架构下的图片上传. // 1.磁盘文件条目工厂
             * DiskFileItemFactory factory = new DiskFileItemFactory();
             * 
             * //2.1 高速的文件上传处理类 ServletFileUpload sfu = new
             * ServletFileUpload(factory);
             * 
             * List<FileItem> list = sfu.parseRequest(request); FileItem picture
             * = null; if(list != null && list.size() > 0){ for(FileItem item :
             * list){ if(!item.isFormField()){ picture = item; } } }
             */
 
            // 1.将请求转化为操作流的请求对象.
            MultipartHttpServletRequest req = (MultipartHttpServletRequest) request;
            MultipartFile picture = req.getFile("file");
            
            if(picture != null && picture.getBytes().length != 0){
                // 2.将图片上传到服务器
                byte[] bytes = picture.getBytes();
                String ext = picture.getOriginalFilename().substring(
                        picture.getOriginalFilename().lastIndexOf(".") + 1
                        );
                // (备注:下列代码为内部业务代码，可根据公司自身的需求，进行更改)
                
                
                map.put("code", "S");
                map.put( "msg", "服务调用成功");
                map.put("statusCode", 200);
                map.put("data", filePath);
            }else{
                throw new RuntimeException("上传图片异常或空图片!");
            }
        } catch (IOException e) {
            e.printStackTrace();
            map.put("code", "F");
            map.put("msg", "服务调用失败");
            map.put("statusCode", 500);
            map.put("data", null);
        }
        return map;
    }
    
    /**
     * 当不知道手机、微信传入前端的参数是什么时，
     * 
     * 可调用该接口进行判断.
     * 
     * @param request
     * @param response
     * @return
     * @throws IOException
     */
    @RequestMapping(value = "/doUploadFileOfCI" , method = RequestMethod.POST )
    public @ResponseBody Map<String,Object> doUploadFile(
            HttpServletRequest request,//请求对象
            HttpServletResponse response) throws IOException{//响应对象
        
        System.out.println("doTestMultipartFile:");
        
        MultipartHttpServletRequest req = (MultipartHttpServletRequest) request;
        //此时说明请求对象是MultipartHttpServletRequest对象
        MultipartFile picture = req.getFile("UploadedImage");
        
        //遍历请求得到所有的数据.
        if(req != null){
            
            //获取所有属性名
            Enumeration enume= req.getAttributeNames();
            while(enume.hasMoreElements()){
                System.out.println("enume:"+enume.nextElement());
            }
            
            //获取所有文件名
            Iterator<String> fileNames = req.getFileNames();
            while(fileNames.hasNext()){
                System.out.println("fileNames:"+fileNames.next());
            }
            
            //获取操作文件的map
            Map<String,MultipartFile> fileMap =  req.getFileMap();
            if(fileMap != null && fileMap.size() > 0){
                Set<String> set = fileMap.keySet();
                for(String key:set){
                    System.out.println("String:"+key);
                }
            }
            
            //获取请求流
            InputStream is = req.getInputStream();
            System.out.println("InputStream:"+is);
            int length = -1;
            while( (length = is.read()) != -1 ){
                System.err.println("data:"+length);
            }
            
            //获取所有请求参数
            Enumeration enumee = req.getParameterNames();
            while(enumee.hasMoreElements()){
                System.out.println("enumee:"+enumee.nextElement());
            }
        }
        
        System.out.println(picture);
        
        
        return null;
    }
 
}