1.客戶端程式碼如下：

import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.util.ArrayList;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
 

import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

public class ClientMultipartFormPost {

    public
 
 static void main(String[] args){
        new ClientMultipartFormPost().initClass();
    }

    public void initClass(){
        //1:建立一個httpclient物件
        HttpClient httpclient = new DefaultHttpClient();
        Charset charset = Charset.forName("UTF-8");//設定編碼
        try {
            //2：建立http的傳送方式物件，是GET還是post
 

            HttpPost httppost = new HttpPost("http://localhost:8080/myhome/mypage/upOutRentHourse.do");

            //3：建立要傳送的實體，就是key-value的這種結構，藉助於這個類，可以實現檔案和引數同時上傳，很簡單的。
            MultipartEntity reqEntity = new MultipartEntity();

            FileBody bin = new FileBody(new File("C:/Users/kin.liufu.2GOTECH/Desktop/資料/Go.XML Message Protocol Specification (V2.88h).doc"));
            FileBody bin1 = new FileBody(new File("C:/Users/kin.liufu.2GOTECH/Desktop/資料/Go.XML Message Protocol Specification (V2.88h).doc"));
            StringBody comment = new StringBody("房子型別為三房一廳",charset);
            ArrayList<FileBody> fileBodys = new ArrayList<>();
            fileBodys.add(bin);
            fileBodys.add(bin1);

            addFileBodyPart("upLoadImage", fileBodys, reqEntity);
            reqEntity.addPart("typeOfHourseRoom", comment);
            httppost.setEntity(reqEntity);

            //4：執行httppost物件，從而獲得資訊
            HttpResponse response = httpclient.execute(httppost);
            HttpEntity resEntity = response.getEntity();

            //獲得返回來的資訊，轉化為字串string
            String resString = EntityUtils.toString(resEntity);
            System.out.println(resString);

        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            try { httpclient.getConnectionManager().shutdown(); } catch (Exception ignore) {}
        }
    }

    //當多個檔案需要上傳時，對檔案進行組裝
    public void addFileBodyPart(String paramName, ArrayList<FileBody> fileBodys, MultipartEntity reqEntity){
        if(fileBodys == null || fileBodys.size() < 1 || reqEntity == null || paramName == null){
            return;
        }
        for(FileBody iteam : fileBodys){
            reqEntity.addPart(paramName,iteam);
        }
    }
}

2.伺服器端的程式碼

package com.myhome.base.controller;

import java.io.File;
import java.util.Date;
import java.util.HashMap;
import java.util.List;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

import com.alibaba.fastjson.JSONObject;
import com.myhome.base.entity.RentHourse;
import com.myhome.base.entity.User;
import com.myhome.base.enums.TypeOfRentHourse;
import com.myhome.base.service.RentHourseService;
import com.myhome.base.service.UserService;
import com.myhome.core.system.InitData;
import com.myhome.core.util.Utility;

/**
 * <p>建立時間: 2016年4月4日</p>
 * @author kin.liufu
 * @describe 租房控制器
 */
@Scope("prototype")
@RequestMapping("/mypage/")
@Controller
public class RentHourseController {

    @Resource 
    private RentHourseService rentHourseService;

    @Resource 
    private UserService userService;

    /**
     * @describe此方法介面給使用者提供釋出房子的資訊
     */
    @RequestMapping(produces = "text/html;charset=UTF-8", value = "upOutRentHourse")
    @ResponseBody
    public String upOutRentHourse(HttpServletRequest request, String typeOfHourseRoom, String typeofHourse, String typeOfPay, String rentPay, String phoneNum, String describe , @RequestParam("upLoadImage") MultipartFile[] upLoadImage){
        String ERRTIP = "";
        HashMap<String, String> hashMap = new HashMap<>();
        if(request.getSession().getAttribute("USERINFO") == null){
            ERRTIP = "TIMEOUTOFLOGIN";
            hashMap.put("ERRTIP", ERRTIP);
        }else if(Utility.isStringEmpty(typeOfHourseRoom) || Utility.isStringEmpty(describe) || Utility.isStringEmpty(phoneNum) || Utility.isStringEmpty(rentPay)){
            ERRTIP = "傳過來的資訊有空";
            hashMap.put("ERRTIP", ERRTIP);
        }else{
            String relativePath = "";
            RentHourse rentHourse = new RentHourse();
            MultipartFile multipartFile = null;
            if(upLoadImage != null && upLoadImage.length > 0){
                String rentHoursePath = "";
                for(int i=0; i<upLoadImage.length && i <= 7; i++){
                    multipartFile = upLoadImage[i];
                    String fileName = multipartFile.getOriginalFilename();
                    if(!Utility.isStringEmpty(fileName)){
                        relativePath = Utility.formatDateToString(new Date(), "YYYY-MM-dd") + "/" + System.currentTimeMillis() + "~" + (int)(Math.random()*100) + Utility.getTypeOfFile(fileName);
                        File targetFile = new File(InitData.outPutPath, "USER/Imges/rentHourseImages/" + relativePath);  
                        if(!targetFile.exists()){  
                            targetFile.mkdirs();  
                            //儲存  
                            try {  
                                multipartFile.transferTo(targetFile);  
                            } catch (Exception e) {  
                                e.printStackTrace();  
                            }  
                        }
                        if(Utility.isStringEmpty(rentHoursePath)){
                            rentHoursePath += relativePath;
                        }else{
                            rentHoursePath += "&&" + relativePath;
                        }
                    }
                }
                rentHourse.setImagePath(rentHoursePath);
            }

            if("oneroom".equals(typeOfHourseRoom)){
                rentHourse.setTypeOfRentHourse(TypeOfRentHourse.ONEROOM);
            }else if("tworoom".equals(typeOfHourseRoom)){
                rentHourse.setTypeOfRentHourse(TypeOfRentHourse.TWOROOM);
            }else if("threeroom".equals(typeOfHourseRoom)){
                rentHourse.setTypeOfRentHourse(TypeOfRentHourse.THREEROOM);
            }else if("fourroom".equals(typeOfHourseRoom)){
                rentHourse.setTypeOfRentHourse(TypeOfRentHourse.FOURROOM);
            }else if("morefourroom".equals(typeOfHourseRoom)){
                rentHourse.setTypeOfRentHourse(TypeOfRentHourse.MOREFOURROOM);
            }
            User user = (User) request.getSession().getAttribute("USERINFO");
            rentHourse.setUser(user);
            rentHourse.setTypeofHourse(typeofHourse);
            rentHourse.setUserName(user.getName());
            rentHourse.setPayfor(Float.valueOf(rentPay));
            rentHourse.setPhoneNum(phoneNum);
            rentHourse.setDescribe(describe);
            rentHourse.setTypeOfPay(typeOfPay);
            if(!rentHourseService.save(rentHourse)){
                ERRTIP = "房子釋出的時候，儲存到資料庫時，出現了錯誤";
                hashMap.put("ERRTIP", ERRTIP);
            }
        }
        return JSONObject.toJSONString(hashMap);
    }
}

總結：httpclient的請求需要依賴httpmime-4.2.jar、httpclient-4.2.jar、commons-logging-1.1.1.jar、httpcore-4.2.jar

每個包提供的功能如下：
1.httpmime-4.2.jar提供FileBody、StringBody和MultipartEntity
2.httpclient-4.2.jar提供httpclient最主要的功能，比如：HttpClient、HttpPost等。
3.commons-logging-1.1.1.jar提供日誌列印功能，也是不能少的
4.httpcore-4.2.jar提供一些供httpclient使用的核心介面