本文实例讲述了Golang+Android基于HttpURLConnection实现的文件上传功能。分享给大家供大家参考，具体如下：
这里要演示的是使用Android程序作为客户端（使用HttpURLConnection访问网络），Golang程序作为服务器端，实现文件上传。
客户端代码：
public static String uploadFile(String uploadUrl, String filePath) { Log.v(TAG, "url:" + uploadUrl); Log.v(TAG, "filePath:" + filePath); String nextLine = "\r\n"; String dividerStart = "--"; String boundary = "******"; try { URL url = new URL(uploadUrl); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setChunkedStreamingMode(1024 * 256); connection.setDoInput(true); connection.setDoOutput(true); connection.setUseCaches(false); connection.setRequestMethod("POST"); // 设置Http请求头 connection.setRequestProperty("Connection", "Keep-Alive"); connection.setRequestProperty("Charset", "UTF-8"); //必须在Content-Type 请求头中指定分界符 connection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary); //定义数据写入流，准备上传文件 DataOutputStream dos = new DataOutputStream(connection.getOutputStream()); dos.writeBytes(dividerStart + boundary + nextLine); //设置与上传文件相关的信息 dos.writeBytes("Content-Disposition: form-data; name=\"file\"; filename=\"" + filePath.substring(filePath.lastIndexOf("/") + 1) + "\"" + nextLine); dos.writeBytes(nextLine); FileInputStream fis = new FileInputStream(filePath); byte[] buffer = new byte[1024 * 32]; int count; // 读取文件内容，并写入OutputStream对象 while ((count = fis.read(buffer)) != -1) { dos.write(buffer, 0, count); } fis.close(); dos.writeBytes(nextLine); dos.writeBytes(dividerStart + boundary + dividerStart + nextLine); dos.flush(); // 开始读取从服务器传过来的信息 InputStream is = connection.getInputStream(); BufferedReader br = new BufferedReader(new InputStreamReader(is, "UTF-8")); String result = br.readLine(); dos.close(); is.close(); connection.disconnect(); return result; } catch (IOException e) { e.printStackTrace(); } return null; }
服务器端代码：
复制代码 代码如下:package webserver
//接收客户端通过http上传的文件
//Date: 2015-3-25 16:18:33
import (
"fmt"
"io/ioutil"
"log"
"net/http"
"os"
)
func UpLoadBase() {
fmt.Println("This is uploadbase")
http.HandleFunc("/httpUploadFile", handleUploadFile)
http.ListenAndServe(":8086", nil)
if err != nil {
fmt.Println("ListenAndServe error: ", err.Error())
}
}
func handleUploadFile(w http.ResponseWriter, r *http.Request) {
fmt.Println("client:", r.RemoteAddr)
file, fileHeader, err := r.FormFile("file")
if err != nil {
log.Fatal("FormFile:", err.Error())
return
}
defer func() {
if err := file.Close(); err != nil {
log.Fatal("Close:", err.Error())
return
}
}()
//文件名
fileName := fileHeader.Filename
if fileName == "" {
log.Fatal("Param filename cannot be null.")
return
}
//文件内容
bytes, err := ioutil.ReadAll(file)
//写到服务端本地文件中
outputFilePath := "/home/admin/桌面/" + fileName
err = ioutil.WriteFile(outputFilePath, bytes, os.ModePerm)
if err != nil {
log.Fatal("WriteFileError:", err.Error())
return
}
w.Write(([]byte)("上传文件成功！"))
}
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希望本文所述对大家Android程序设计有所帮助。