直接上代码
/**
* 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 actionUrl 访问的服务器URL * @param params 普通参数 * @param files 文件参数 * @return * @throws IOException */ public static void post(String actionUrl, Map<String, String> params, Map<String, File> files) throws IOException { String BOUNDARY = java.util.UUID.randomUUID().toString(); String PREFIX = "--", LINEND = "\r\n"; String MULTIPART_FROM_DATA = "multipart/form-data"; String CHARSET = "UTF-8"; URL uri = new URL(actionUrl); HttpURLConnection conn = (HttpURLConnection) uri.openConnection(); conn.setReadTimeout(5 * 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<String, String> 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()); InputStream in = null; // 发送文件数据 if (files != null) { for (Map.Entry<String, File> file : files.entrySet()) { StringBuilder sb1 = new StringBuilder(); sb1.append(PREFIX); sb1.append(BOUNDARY); sb1.append(LINEND); // name是post中传参的键 filename是文件的名称 sb1.append("Content-Disposition: form-data; name=\"file\"; filename=\"" + file.getKey() + "\"" + 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(); if (res == 200) { in = conn.getInputStream(); int ch; StringBuilder sb2 = new StringBuilder(); while ((ch = in.read()) != -1) { sb2.append((char) ch); } } outStream.close(); conn.disconnect(); } // return in.toString(); } 以数据流的形式传参 public static String postFile(String actionUrl, Map<String, String> params, Map<String, byte[]> files) throws Exception { StringBuilder sb2 = null; String BOUNDARY = java.util.UUID.randomUUID().toString(); String PREFIX = "--", LINEND = "\r\n"; String MULTIPART_FROM_DATA = "multipart/form-data"; String CHARSET = "UTF-8"; URL uri = new URL(actionUrl); HttpURLConnection conn = (HttpURLConnection) uri.openConnection(); conn.setReadTimeout(6 * 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<String, String> 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()); InputStream in = null; // 发送文件数据 if (files != null) { for (Map.Entry<String, byte[]> file : files.entrySet()) { StringBuilder sb1 = new StringBuilder(); sb1.append(PREFIX); sb1.append(BOUNDARY); sb1.append(LINEND); sb1.append("Content-Disposition: form-data; name=\"pic\"; filename=\"" + file.getKey() + "\"" + 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(file.getValue()); 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(); if (res == 200) { in = conn.getInputStream(); int ch; sb2 = new StringBuilder(); while ((ch = in.read()) != -1) { sb2.append((char) ch); } System.out.println(sb2.toString()); } outStream.close(); conn.disconnect(); // 解析服务器返回来的数据 return ParseJson.getEditMadIconResult(sb2.toString()); } else { return "Update icon Fail"; } // return in.toString();}
项目改进
public static HttpURLConnection getCon(String url) { try { URL uri = new URL(url); HttpURLConnection conn = (HttpURLConnection) uri.openConnection(); conn.setConnectTimeout(CONNECTTIMEOUT); conn.setReadTimeout(READTIMEOUT); conn.setDoOutput(true); conn.setDoInput(true); conn.setUseCaches(false); conn.setRequestMethod("POST"); conn.setRequestProperty("Connection", "Keep-Alive"); conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.6)"); conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=---------------------------"); return conn; } catch (MalformedURLException e) { System.out.println("请求超时"); BaseAction.LOGGER.error(e); } catch (IOException e) { } return null; } public static String sendPost(String url, File file, Map<String, Object> params, String filename1) { String res = ""; ByteArrayOutputStream ret = null; // boundary就是request头和上传文件内容的分隔符 String boundary = "---------------------------"; DataInputStream in = null; BufferedReader reader = null; FileInputStream fileInputStream = null; try { String rn = "\r\n"; HttpURLConnection conn = getCon(url); OutputStream out = new DataOutputStream(conn.getOutputStream()); // text if (params != null) { StringBuilder strBuf = new StringBuilder(); Iterator<Map.Entry<String, Object>> iter = params.entrySet().iterator(); while (iter.hasNext()) { Map.Entry<String, Object> entry = iter.next(); String inputName = entry.getKey(); Object inputValue = entry.getValue(); if (null == inputValue) { continue; } strBuf.append(rn).append("--").append(boundary).append(rn); strBuf.append("Content-Disposition: form-data; name=\"" + inputName + "\"" + rn + rn); strBuf.append(inputValue); } out.write(strBuf.toString().getBytes()); } // file if (file != null) { StringBuilder strBuf = new StringBuilder(); strBuf.append(rn).append("--").append(boundary).append(rn); strBuf.append("Content-Disposition: form-data; name=\"pic\"; filename=\"" + filename1 + "\"" + rn); strBuf.append("Content-Type:application/octet-stream " + rn + rn); out.write(strBuf.toString().getBytes()); fileInputStream = new FileInputStream(file); in = new DataInputStream(fileInputStream); int bytes; byte[] bufferOut = new byte[MAX]; while ((bytes = in.read(bufferOut)) != -1) { out.write(bufferOut, 0, bytes); } in.close(); fileInputStream.close(); } byte[] endData = ("\r\n--" + boundary + "--\r\n").getBytes(); out.write(endData); out.flush(); out.close(); // ******************************************* // 读取返回数据 /* * StringBuilder strBuf = new StringBuilder(); reader = new * BufferedReader( new InputStreamReader(conn.getInputStream())); * String line; while ((line = reader.readLine()) != null) { * strBuf.append(line).append("\n"); } res = strBuf.toString(); * System.out.println(" 返回：" + res); //System.out.println(" 返回：" + * DESUtil.decrypt(res)); reader.close(); */ // ****newread***************************************** InputStream input = conn.getInputStream(); // 字节数组 byte[] bcache = new byte[2048]; int readSize = 0;// 每次读取的字节长度 ret = new ByteArrayOutputStream(); try { // 一次性读取2048字节 while ((readSize = input.read(bcache)) > 0) { ret.write(bcache, 0, readSize); } } catch (IOException e1) { BaseAction.LOGGER.error(e1); } finally { try { // 输入流关闭 input.close(); } catch (IOException e) { } } System.out.println(" 返回：" + ret.toString()); // *****newreadend // *************************************************************** conn.disconnect(); } catch (IOException e) { } finally { try { if (in != null) { in.close(); } if (reader != null) { reader.close(); } if (fileInputStream != null) { fileInputStream.close(); } } catch (IOException e) { BaseAction.LOGGER.error(e); } } return ret.toString(); }
