使用HttpURLConnection通过POST方式提交请求数据，并上传文件

来源：互联网发布：语音软件排行编辑：程序博客网时间：2024/06/05 07:43

import java.io.BufferedReader;import java.io.DataOutputStream;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;import java.util.List;import java.util.Map;import java.util.UUID;public class MyHttpUploader {    /**     * 使用HttpURLConnection通过POST方式提交请求，并上传文件。     *      * @param actionUrl     *            访问的url     * @param textParams     *            文本类型的POST参数(key:value)     * @param filePaths     *            文件路径的集合     * @return 服务器返回的数据，出现异常时返回 null     */    public static String httpPostWithFiles(String actionUrl, Map<String, String> textParams, List<String> filePaths) {        BufferedReader br = null;        DataOutputStream outStream = null;        HttpURLConnection conn = null;        InputStream is=null;        try {            final String BOUNDARY = UUID.randomUUID().toString();            final String PREFIX = "--";            final String LINE_END = "\r\n";            final String MULTIPART_FROM_DATA = "multipart/form-data";            final String CHARSET = "UTF-8";            URL uri = new URL(actionUrl);            conn = (HttpURLConnection) uri.openConnection();            // 缓存大小            conn.setChunkedStreamingMode(1024 * 64);            // 超时            conn.setReadTimeout(50 * 1000);            conn.setDoInput(true);            conn.setDoOutput(true);            conn.setUseCaches(false);            conn.setRequestMethod("POST");            conn.setRequestProperty("connection", "keep-alive");            conn.setRequestProperty("Charset", "UTF-8");            conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA + ";boundary=" + BOUNDARY);            // 拼接文本类型的参数            StringBuilder textSb = new StringBuilder();            if (textParams != null && textParams.size()>0) {                for (Map.Entry<String, String> entry : textParams.entrySet()) {                    textSb.append(PREFIX).append(BOUNDARY).append(LINE_END);                    textSb.append("Content-Disposition: form-data; name=\"" + entry.getKey() + "\"" + LINE_END);                    textSb.append("Content-Type: text/plain; charset=" + CHARSET + LINE_END);                    textSb.append("Content-Transfer-Encoding: 8bit" + LINE_END);                    textSb.append(LINE_END);                    textSb.append(entry.getValue());                    textSb.append(LINE_END);                }            }            outStream = new DataOutputStream(conn.getOutputStream());            outStream.write(textSb.toString().getBytes());            //System.out.println(textSb.toString());            // 发送文件数据            if (filePaths != null && filePaths.size()>0) {                for (int i = 0; i < filePaths.size(); i++) {                    String _filePath = filePaths.get(i);                    StringBuilder fileSb = new StringBuilder();                    fileSb.append(PREFIX).append(BOUNDARY).append(LINE_END);                    fileSb.append("Content-Disposition: form-data; name=\"files" + (i + 1) + "\"; filename=\""                            + _filePath.substring(_filePath.lastIndexOf("/") + 1) + "\"" + LINE_END);                    fileSb.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINE_END);                    fileSb.append(LINE_END);                    //System.out.println(fileSb.toString());                    outStream.write(fileSb.toString().getBytes());                    is = new FileInputStream(_filePath);                    byte[] buffer = new byte[1024 * 8];                    int len;                    while ((len = is.read(buffer)) != -1) {                        outStream.write(buffer, 0, len);                    }                    outStream.write(LINE_END.getBytes());                }            }            // 请求结束标志            outStream.write((PREFIX + BOUNDARY + PREFIX + LINE_END).getBytes());            outStream.flush();            // 得到响应码            int responseCode = conn.getResponseCode();            br = new BufferedReader(new InputStreamReader(conn.getInputStream(), CHARSET));            StringBuilder resultSb = null;            String line;            if (responseCode == 200) {                resultSb = new StringBuilder();                while ((line = br.readLine()) != null) {                    resultSb.append(line).append("\n");                }            }            return resultSb == null ? null : resultSb.toString();        } catch (IOException e) {            e.printStackTrace();        } finally {            if(is!=null){                try {                    is.close();                } catch (IOException e) {                    e.printStackTrace();                }            }            if (br != null) {                try {                    br.close();                } catch (IOException e) {                    e.printStackTrace();                }            }            if (outStream != null) {                try {                    outStream.close();                } catch (IOException e) {                    e.printStackTrace();                }            }            if (conn != null) {                conn.disconnect();            }        }        return null;    }}

下面的测试类

package sy.controller.news;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import java.util.TreeMap;import sy.common.exception.LcsTipException;import sy.util.HttpClientUtils;import sy.util.MD5;public class Main {    public static void main(String[] args) throws Exception {        main2();    }    public static void main2() {                String url="http://localhost/demoWeb/fileUpload/fileAccept.do";        List<String> filePathsList=new ArrayList<String>();        filePathsList.add("C:\\aa\\bb\\eee.png");        filePathsList.add("C:\\aa\\bb\\shala2016.png");        Map<String, String> params=new HashMap<String, String>();        params.put("content", "这里是content内容哦");        params.put("mobile", "185XXXXXXXX");        String aaa=new MyHttpUploader().httpPostWithFiles(url, params, filePathsList);        System.out.println("返回结果："+aaa);            }}

0 0