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一个图片上传的工具类

package com.first.mzystore.utils;

import android.util.Log;

import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Map;
import java.util.UUID;

/**
 *
 * 上传工具类
 * 支持上传文件和参数
 */
public class UploadUtil {
	private static final String TAG = "uploadFile";
	private static final int TIME_OUT = 10 * 1000; // 超时时间
	private static final String CHARSET = "utf-8"; // 设置编码

	/**
	 * 上传文件到服务端
	 *
	 * @param file
	 *            需要上传的文件
	 * @param RequestURL
	 *            请求的rul
	 * @return 返回响应的内容
	 */
	public static String uploadFile(File file, String RequestURL) {
		String result = null;
		String BOUNDARY = UUID.randomUUID().toString(); // 边界标识 随机生成
		String PREFIX = "--", LINE_END = "\r\n";
		String CONTENT_TYPE = "multipart/form-data"; // 内容类型
		try {
			URL url = new URL(RequestURL);
			HttpURLConnection conn = (HttpURLConnection) url.openConnection();
			conn.setReadTimeout(TIME_OUT);
			conn.setConnectTimeout(TIME_OUT);
			conn.setDoInput(true); // 允许输入流
			conn.setDoOutput(true); // 允许输出流
			conn.setUseCaches(false); // 不允许使用缓存
			conn.setRequestMethod("POST"); // 请求方式
			conn.setRequestProperty("Charset", CHARSET); // 设置编码
			conn.setRequestProperty("connection", "keep-alive");
			conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary="
					+ BOUNDARY);
			if (file != null) {
				/**
				 * 当文件不为空,把文件包装并且上传
				 */
				DataOutputStream dos = new DataOutputStream(
						conn.getOutputStream());
				StringBuffer sb = new StringBuffer();
				sb.append(PREFIX);
				sb.append(BOUNDARY);
				sb.append(LINE_END);
				/**
				 * 这里重点注意: name里面的值为服务端需要key 只有这个key 才可以得到对应的文件
				 * filename是文件的名字,包含后缀名的 比如:abc.png
				 */
				sb.append("Content-Disposition: form-data; name=\"uploadfile\"; filename=\""
						+ file.getName() + "\"" + LINE_END);
				sb.append("Content-Type: application/octet-stream; charset="
						+ CHARSET + LINE_END);
				sb.append(LINE_END);
				dos.write(sb.toString().getBytes());
				InputStream is = new FileInputStream(file);
				byte[] bytes = new byte[1024];
				int len = 0;
				while ((len = is.read(bytes)) != -1) {
					dos.write(bytes, 0, len);
				}
				is.close();
				dos.write(LINE_END.getBytes());
				byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END)
						.getBytes();
				dos.write(end_data);
				dos.flush();
				/**
				 * 获取响应码 200=成功 当响应成功,获取响应的流
				 */
				int res = conn.getResponseCode();
				Log.e(TAG, "response code:" + res);
				// if(res==200)
				// {
				Log.e(TAG, "request success");
				InputStream input = conn.getInputStream();
				StringBuffer sb1 = new StringBuffer();
				Log.e(TAG, "sb1 : " + sb1);
				int ss;
				while ((ss = input.read()) != -1) {
					sb1.append((char) ss);
				}
				result = sb1.toString();
				Log.e(TAG, "result : " + result);
				// }
				// else{
				// Log.e(TAG, "request error");
				// }
			}
		} catch (MalformedURLException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return result;
	}

	/**
	 * 通过拼接的方式构造请求内容,实现参数传输以及文件传输
	 *
	 * @param url
	 *            Service net address
	 * @param params
	 *            text content
	 * @param files
	 *            pictures
	 * @return String result of Service response
	 * @throws IOException
	 */
	public static String post(String url, Map params,
							  Map files) throws IOException {
		String BOUNDARY = UUID.randomUUID().toString();
		String PREFIX = "--", LINEND = "\r\n";
		String MULTIPART_FROM_DATA = "multipart/form-data";
		String CHARSET = "UTF-8";
		URL uri = new URL(url);
		HttpURLConnection conn = (HttpURLConnection) uri.openConnection();
		conn.setReadTimeout(10 * 1000); // 缓存的最长时间
		conn.setDoInput(true);// 允许输入
		conn.setDoOutput(true);// 允许输出
		conn.setUseCaches(false); // 不允许使用缓存
		conn.setRequestMethod("POST");
		conn.setRequestProperty("connection", "keep-alive");
		conn.setRequestProperty("Charsert", "UTF-8");
		conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA
				+ ";boundary=" + BOUNDARY);
		// 首先组拼文本类型的参数
		StringBuilder sb = new StringBuilder();
		for (Map.Entry entry : params.entrySet()) {
			sb.append(PREFIX);
			sb.append(BOUNDARY);
			sb.append(LINEND);
			sb.append("Content-Disposition: form-data; name=\""
					+ entry.getKey() + "\"" + LINEND);
			sb.append("Content-Type: text/plain; charset=" + CHARSET + LINEND);
			sb.append("Content-Transfer-Encoding: 8bit" + LINEND);
			sb.append(LINEND);
			sb.append(entry.getValue());
			sb.append(LINEND);
		}
		DataOutputStream outStream = new DataOutputStream(
				conn.getOutputStream());
		outStream.write(sb.toString().getBytes());
		// 发送文件数据
		if (files != null)
			for (Map.Entry file : files.entrySet()) {
				StringBuilder sb1 = new StringBuilder();
				sb1.append(PREFIX);
				sb1.append(BOUNDARY);
				sb1.append(LINEND);
				sb1.append("Content-Disposition: form-data; name=\"uploadfile\"; filename=\""
						+ file.getValue().getName() + "\"" + LINEND);
				sb1.append("Content-Type: application/octet-stream; charset="
						+ CHARSET + LINEND);
				sb1.append(LINEND);
				outStream.write(sb1.toString().getBytes());
				InputStream is = new FileInputStream(file.getValue());
				byte[] buffer = new byte[1024];
				int len = 0;
				while ((len = is.read(buffer)) != -1) {
					outStream.write(buffer, 0, len);
				}
				is.close();
				outStream.write(LINEND.getBytes());
			}
		// 请求结束标志
		byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();
		outStream.write(end_data);
		outStream.flush();
		// 得到响应码
		int res = conn.getResponseCode();
		InputStream in = conn.getInputStream();
		StringBuilder sb2 = new StringBuilder();
		if (res == 200) {
			int ch;
			while ((ch = in.read()) != -1) {
				sb2.append((char) ch);
			}
		}
		outStream.close();
		conn.disconnect();
		return sb2.toString();
	}
}

使用方法?

?
public void upImg(final File urls) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                Map files = new HashMap<>();
                Map params = new HashMap();
                params.put("PlatForm", "load");//参数自己根据接口添加
                params.put("Path", "/Upload/image");//参数自己根据接口添加
                files.put("url1", urls);
                String url = null;
                try {
                    url = UploadUtil.post("http://file.xsmore.com:80/api/image/upload", params, files);
                    //Log.w("========data",url);
                    urlFront = url.substring(2, url.length() - 2);
                    handler.sendEmptyMessageDelayed(1, 2000);
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }).start();
    }

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原文地址:一个图片上传的工具类