1、服务器jsp页面upload.jsp

<%@page import="java.io.FileWriter"%>
<%@page import="java.io.File"%>
<%@page import="java.util.Date"%>
<%@page import="java.text.SimpleDateFormat"%>
<%@page import="java.io.IOException"%>
<%@page import="java.io.InputStreamReader"%>
<%@page import="java.io.FileReader"%>
<%@page import="java.io.BufferedWriter"%>
<%@page import="java.io.BufferedReader"%>
<%@page import="java.io.InputStream"%>

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
	request.setCharacterEncoding("UTF-8");
	String savePath = "../log/";
	BufferedReader reader = null;
	BufferedWriter writer = null;
	SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");
	String fileName = sdf.format(new Date()) + ".log";
	File file = null;
	StringBuffer buffer = new StringBuffer();
	String temp = null;
	try {
		reader = new BufferedReader(new InputStreamReader(request.getInputStream()));
		file = new File(savePath + fileName);
		if(!file.exists()){
		file.createNewFile();
		}
		writer = new BufferedWriter(new FileWriter(file));
		while((temp = reader.readLine()) != null){
		buffer.append(temp);
		}
		writer.write(buffer.toString());
		out.print("upload Success");
	} catch (Exception e) {
	e.printStackTrace();
		out.print("upload server Exception");
	}finally{
		try{
			if(reader != null){
				reader.close();
			}
			if(writer != null){
				writer.close();
			}
		}catch(IOException e){}
	}
%>

2、上传文本文件方法

public static void uploadFile(String uploadFile)
{
	String filePath = "/mnt/sdcard/"+ uploadFile;
	try
	{
		URL url = new URL("https://www.geekapp.cn/upload.jsp");
		HttpURLConnection con = (HttpURLConnection) url.openConnection();
		/* 允许Input、Output，不使用Cache */
		con.setDoInput(true);
		con.setDoOutput(true);
		con.setUseCaches(false);
		/* 设定传送的method=POST */
		con.setRequestMethod("POST");
		/* setRequestProperty */
		con.setRequestProperty("Connection", "Keep-Alive");
		con.setRequestProperty("Charset", "UTF-8");
		con.setRequestProperty("Content-Type",
		"multipart/form-data" );
		/* 设定DataOutputStream */
		DataOutputStream ds = new DataOutputStream(con.getOutputStream());
		/* 取得文件的FileInputStream */
		FileInputStream fStream = new FileInputStream(filePath);
		/* 设定每次写入1024bytes */
		byte[] buffer = new byte[1024];
		int length = -1;
		/* 从文件读取数据到缓冲区 */
		while ((length = fStream.read(buffer)) != -1)
		{
			/* 将数据写入DataOutputStream中 */
			ds.write(buffer, 0, length);
		}
		fStream.close();
		ds.flush();
		ds.close();
	} catch (Exception e)
	{
	Log.e("文件上传", e.getMessage());
	}
}

原创内容转载请保留出处GEEK笔记(https://www.geekapp.cn/)。