httpconnent传输附件

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package com.zte.mdm.home.util; import java.io.ByteArrayOutputStream; import java.io.DataOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.InputStream; import java.lang.reflect.Type; import java.net.HttpURLConnection; import java.net.SocketTimeoutException; import java.net.URL; import java.net.URLEncoder; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Set; import javax.imageio.ImageIO; import javax.imageio.ImageReader; import javax.imageio.stream.ImageInputStream; 
import com.google.gson.Gson; import com.google.gson.reflect.TypeToken;
/** * @see 通过HttpURLConnection请求商家系统进行商家注册 * @author zhengcf * @since 2015/02/28 */ public class HttpPostUtil { URL url; HttpURLConnection conn; String boundary = "--------httppost"; Map<String, String> textParams = new HashMap<String, String>(); Map<String, File> fileparams = new HashMap<String, File>(); DataOutputStream ds; String para; public HttpPostUtil(String url) throws Exception { this.url = new URL(url); } /** * @author zcf * @param url * @throws Exception */ //重新设置要请求的服务器地址，即上传文件的地址。 public void setUrl(String url) throws Exception { this.url = new URL(url); } //增加一个普通字符串数据到form表单数据中 public void addTextParameter(String name, String value) { textParams.put(name, value); } //批量增加字符类键值对 public void addAllTextParameter(Map<String, String> Params) { textParams.putAll(Params); } //增加一个文件到form表单数据中 public void addFileParameter(String name, File value) { fileparams.put(name, value); } // 清空所有已添加的form表单数据 public void clearAllParameters() { textParams.clear(); fileparams.clear(); } // 发送数据到服务器，返回一个字节包含服务器的返回结果的数组 public byte[] send() throws Exception { initConnection(); try { conn.connect(); } catch (SocketTimeoutException e) { // something throw new RuntimeException(); } ds = new DataOutputStream(conn.getOutputStream()); writeFileParams(); writeStringParams(); paramsEnd(); InputStream in = conn.getInputStream(); ByteArrayOutputStream out = new ByteArrayOutputStream(); int b; while ((b = in.read()) != -1) { out.write(b); } conn.disconnect(); return out.toByteArray(); } //文件上传的connection的一些必须设置 private void initConnection() throws Exception { conn = (HttpURLConnection) this.url.openConnection(); conn.setDoOutput(true); conn.setUseCaches(false); conn.setConnectTimeout(10000); //连接超时为10秒 conn.setRequestMethod("POST"); conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary); } //普通字符串数据 private void writeStringParams() throws Exception { Set<String> keySet = textParams.keySet(); for (Iterator<String> it = keySet.iterator(); it.hasNext();) { String name = it.next(); String value = textParams.get(name); ds.writeBytes("--" + boundary + "\r\n"); ds.writeBytes("Content-Disposition: form-data; name=\"" + name + "\"\r\n"); ds.writeBytes("\r\n"); ds.writeBytes(encode(value) + "\r\n"); } } //文件数据 private void writeFileParams() throws Exception { Set<String> keySet = fileparams.keySet(); for (Iterator<String> it = keySet.iterator(); it.hasNext();) { String name = it.next(); File value = fileparams.get(name); ds.writeBytes("--" + boundary + "\r\n"); ds.writeBytes("Content-Disposition: form-data; name=\"" + name + "\"; filename=\"" + encode(value.getName()) + "\"\r\n"); ds.writeBytes("Content-Type: " + getContentType(value) + "\r\n"); ds.writeBytes("\r\n"); ds.write(getBytes(value)); ds.writeBytes("\r\n"); } } //获取文件的上传类型，图片格式为image/png,image/jpg等。非图片为application/octet-stream private String getContentType(File f) throws Exception { // return "application/octet-stream"; // 此行不再细分是否为图片，全部作为application/octet-stream 类型 ImageInputStream imagein = ImageIO.createImageInputStream(f); if (imagein == null) { return "application/octet-stream"; } Iterator<ImageReader> it = ImageIO.getImageReaders(imagein); if (!it.hasNext()) { imagein.close(); return "application/octet-stream"; } imagein.close(); return "image/" + it.next().getFormatName().toLowerCase();//将Fo