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利用HttpUrlConnection 上传 接收文件的实现方法

2019年07月22日  | 移动技术网IT编程  | 我要评论

如下所示：

//客户端代码

public static void main(string[] args) throws ioexception {
 datainputstream in = null;
 outputstream out = null;
 httpurlconnection conn = null;
 jsonobject resposetxt = null;
 inputstream ins = null;
 bytearrayoutputstream outstream = null;
 try {
  url url = new url("http://10.28.160.160:9080/main/uploadfile?filename=列表.txt");
  conn = (httpurlconnection) url.openconnection();
  // 发送post请求必须设置如下两行
  conn.setdooutput(true);
  conn.setusecaches(false);
  conn.setrequestmethod("post");
  conn.setrequestproperty("content-type", "text/html");
  conn.setrequestproperty("cache-control", "no-cache");
  conn.setrequestproperty("charsert", "utf-8");
  conn.connect();
  conn.setconnecttimeout(10000);
  out = conn.getoutputstream();

  file file = new file("h:/users/chengtingyu/desktop/test/list.txt");
  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();

  // 返回流
  if (conn.getresponsecode() == httpurlconnection.http_ok) {
  ins = conn.getinputstream();
  outstream = new bytearrayoutputstream();
  byte[] data = new byte[1024];
  int count = -1;
  while ((count = ins.read(data, 0, 1024)) != -1) {
   outstream.write(data, 0, count);
  }
  data = null;
  resposetxt = jsonobject.parseobject(new string(outstream
   .tobytearray(), "utf-8"));
  }
 } catch (exception e) {
  e.printstacktrace();
 } finally {
  if (in != null) {
  in.close();
  }
  if (out != null) {
  out.close();
  }
  if (ins != null) {
  ins.close();
  }
  if (outstream != null) {
  outstream.close();
  }
  if (conn != null) {
  conn.disconnect();
  }
 }
 }

 

//服务端代码

 

public string uploadfile() throws exception{
    string filename = request.getparameter("filename");  
    string filefullpath = "h:/users/chengtingyu/desktop/" + filename;
    inputstream input = null;
    fileoutputstream fos = null;
 try {
  input = request.getinputstream();
  file file = new file("h:/users/chengtingyu/desktop");  
     if(!file.exists()){  
       file.mkdirs();  
     }  
     fos = new fileoutputstream(filefullpath);  
     int size = 0;  
     byte[] buffer = new byte[1024];  
     while ((size = input.read(buffer,0,1024)) != -1) {  
       fos.write(buffer, 0, size);  
     }
     
     //响应信息 json字符串格式
     map<string,object> responsemap = new hashmap<string,object>();
     responsemap.put("flag", true);
     
     //生成响应的json字符串
      string jsonresponse = jsonobject.tojsonstring(responsemap);
     sendresponse(jsonresponse);
 } catch (ioexception e) {
  //响应信息 json字符串格式
     map<string,object> responsemap = new hashmap<string,object>();
     responsemap.put("flag", false);
     responsemap.put("errormsg", e.getmessage());
     string jsonresponse = jsonobject.tojsonstring(responsemap);
     sendresponse(jsonresponse);
 } finally{
  if(input != null){
  input.close();
  }
  if(fos != null){
  fos.close();
  }
 }  
      
    return null;
 }
 
 
 
 /**
   * 返回响应
   * 
   * @throws exception
   */
  private void sendresponse(string responsestring) throws exception {
   response.setcontenttype("application/json;charset=utf-8");
    printwriter pw = null;
    try {
      pw = response.getwriter();
      pw.write(responsestring);
      pw.flush();
    } finally {
      ioutils.closequietly(pw);
    }
  }

以上这篇利用httpurlconnection 上传 接收文件的实现方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持移动技术网。

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