httpurlConnection客户端发送文件与服务端接受文件

最新推荐文章于 2021-12-02 17:52:42 发布

转载最新推荐文章于 2021-12-02 17:52:42 发布 · 396 阅读

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CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/javadongx/p/httpurlconnection.html

文章标签：

#java #json

本文介绍了一个使用Java实现的文件上传和下载的示例，包括客户端如何发送文件到服务器，以及服务器端如何接收并保存文件的具体实现过程。

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import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;

import org.apache.commons.lang.StringUtils;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;

import com.kexion.eagle.common.dao.DaoException;
import com.kexion.ssdr.dmp.web.utils.PropertiesUtil;
//客户端发送
public class TestSendFile {
    
    public static void main(String[] args) {
        try {
            sendFile1("Template_ZYMLBZHJC.xlsx", "D:"+File.separatorChar+"2019"+File.separatorChar+"个人"+File.separatorChar+"Template_ZYMLBZHJC.xlsx", "zxsb");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    private static String sendFile1(String filename,String dir,String type) throws Exception {
        PropertiesUtil util = new PropertiesUtil("config/zymlk.properties");
        Object obj = util.get(type);
        if(obj==null){
            throw new Exception("调用省厅接口失败");
        }
        String actionUrl = (java.lang.String) util.get(type);
        if(StringUtils.isEmpty(actionUrl)){
            throw new Exception("调用省厅接口失败");
        }
        
        String u1 = actionUrl+"?filename="+filename;
        URL url =new URL(u1);
        System.out.println(u1);
        URLConnection urlConnection = url.openConnection();
         HttpURLConnection httpURLConnection = (HttpURLConnection) urlConnection;
         httpURLConnection.setDoOutput(true);
         httpURLConnection.setUseCaches(false);
         httpURLConnection.setRequestMethod("POST");
         httpURLConnection.setRequestProperty("Content-type", "text/html");
         httpURLConnection.setRequestProperty("Cache-Control", "no-cache");
         httpURLConnection.setRequestProperty("Charset", "UTF-8");
         httpURLConnection.connect();
         
         
         OutputStream out = httpURLConnection.getOutputStream();
         DataInputStream in = null;
         
         File file = new File(dir);
         in = new DataInputStream(new FileInputStream(file));
         int bytes=0;
         byte[] buffer = new byte[1024];
         while((bytes=in.read(buffer))!=-1){
             out.write(buffer,0,bytes);
         }
         out.flush();
         
         
         InputStream inputStream=null;
         InputStreamReader inputStreamReader = null;
         BufferedReader reader = null;
         StringBuffer resultBuffer = null;
         if(httpURLConnection.getResponseCode()==HttpURLConnection.HTTP_OK){
             inputStream = httpURLConnection.getInputStream();
             inputStreamReader = new InputStreamReader(inputStream);
             reader = new BufferedReader(inputStreamReader);
             String tmpLine = null;
             resultBuffer = new StringBuffer();
             while((tmpLine=reader.readLine())!=null){
                 resultBuffer.append(tmpLine);
                 resultBuffer.append("\n");
             }
         }else{
　　　　　　　　int code=httpURLConnection.getResponseCode()
　　　　　　　　throw new DaoException("上报失败,失败代码["+code+"]");
         }
         
         in.close();
         out.close();
         reader.close();
         inputStreamReader.close();
         inputStream.close();
         System.out.println(resultBuffer.toString());
        return resultBuffer.toString();
    }

}

//服务端接收

package com.dd.demo.controller;


import java.io.*;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class StbmglController {
    //打印日志
    private static final Logger logger = LoggerFactory.getLogger(StbmglController.class);

    @ResponseBody
    @RequestMapping("getDsFile1")
    public String getDsFile1(HttpServletRequest request,HttpServletResponse response){
        logger.info("开始接受文件");
        JSONObject result = new JSONObject();
        try {

            String filename = request.getParameter("filename");
            logger.info("filename={}",filename);
            InputStream  input = request.getInputStream();
            File getFile = new File("C:\\Users\\Administrator\\Desktop\\"+filename);

            FileOutputStream fos = new FileOutputStream(getFile);
            boolean flag = false;
            int size = 0;
            byte[] buffer = new byte[1024];
            while ((size=input.read(buffer,0,1024))!=-1){
                flag = true;
                fos.write(buffer,0,size);
            }
            result.put("success",flag);
        } catch (Exception e) {
            result.put("success",false);
            result.put("msg","接受文件失败");
            logger.error("接受文件失败");
            e.printStackTrace();
        }
        return result.toString();
    }
}