HttpsURLConnection上传文件流(实例讲解)

项目需要对接外部接口，将图片文件流发送到外部接口，下面代码就是httpsurlconnection如何上传文件流：

/**
   * httpsurlconnection上传文件流
   *
   * @param args
   * @throws exception
   */
  public static void main(string[] args) throws exception {
    //本地图片
    java.io.file file = new java.io.file("/users/jikukalun/pictures/id1.jpg");
    fileinputstream fileinputstream = new fileinputstream(file);
    //对接外部接口
    string urlstring = "************";

    url url = new url(urlstring);
    httpsurlconnection con = (httpsurlconnection) url.openconnection();
    // 设置是否向httpurlconnection输出，因为这个是post请求，参数要放在
    // http正文内，因此需要设为true, 默认情况下是false;
    con.setdooutput(true);
    // 设置是否从httpurlconnection读入，默认情况下是true;
    con.setdoinput(true);
    // 设定请求的方法为"post"，默认是get
    con.setrequestmethod("post");
    // post 请求不能使用缓存
    con.setusecaches(false);
    // 设定传送的内容类型是可序列化的java对象
    // (如果不设此项,在传送序列化对象时,当web服务默认的不是这种类型时可能抛java.io.eofexception)
//    con.setrequestproperty("content-type", "application/x-java-serialized-object");
    outputstream out = con.getoutputstream();

    //读取本地图片文件流
    fileinputstream inputstream = new fileinputstream(file);
    byte[] data = new byte[2048];
    int len = 0;
    int sum = 0;
    while ((len = inputstream.read(data)) != -1) {
      //将读取到的本地文件流读取到httpsurlconnection,进行上传
      out.write(data, 0, len);
      sum = len + sum;
    }

    system.out.println("上传图片大小为:" + sum);

    out.flush();
    inputstream.close();
    out.close();

    int code = con.getresponsecode(); //获取post请求返回状态
    system.out.println("code=" + code + " url=" + url);
    if (code == 200) {
      inputstream inputstream2 = con.getinputstream();
      bytearrayoutputstream bos = new bytearrayoutputstream();
      while ((len = inputstream2.read(data)) != -1) {
        bos.write(data, 0, len);
      }
      inputstream2.close();
      string content = bos.tostring();
      bos.close();
      system.out.println("result =" + content);
      //将返回的json格式的字符串转化为json对象
      jsonobject json = jsonobject.parseobject(content);
      try {
        system.out.println("name=" + json.getstring("name") + ", people=" + json.getstring("people") + ", sex=" + json.getstring("sex")
            + ", id_number=" + json.getstring("id_number") + ", type=" + json.getstring("type") + ", address=" + json.getstring("address")
            + ", birthday=" + json.getstring("birthday"));
      } catch (jsonexception e) {
        e.printstacktrace();
      }
    }
    //断开httpsurlconnection连接
    con.disconnect();
  }

引用jar包：

import com.alibaba.fastjson.jsonexception;
import com.alibaba.fastjson.jsonobject;
import javax.net.ssl.httpsurlconnection;
import java.io.*;
import java.net.httpurlconnection;
import java.net.malformedurlexception;
import java.net.url;

以上这篇httpsurlconnection上传文件流(实例讲解)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。