上传图片携带参数至服务器工具类

本篇采用的上传方式是HttpUrlConnection方法，下篇将写出xutils上传的方法(包括多图片上传显示进度条等)。敬请期待。
//UpLoadFileVideoUtils这个类就是工具类，只需要将这个类拷贝至项目中即可使用。下面是代码部分：

解释下方法里面的参数含义：

Map<String, String> params---用来装你上传服务器需要的参数，注意的是：参数的Key值必须填入的是你服务器定好的参数字段，

Map<String, File> files--将你选择好的图片转成File文件用Map装起来 图片的Key值可以自己命名。
/**
* @author: ZQF_DemoStyle
* @类 说 明:
* @version 1.0
* @创建时间：2016-4-18 下午1:18:24
*/
public class UpLoadFileVideoUtils {

private StringBuilder sb2;

public boolean defaultUploadMethod(String actionUrl,
Map<String, String> params, Map<String, File> files)
throws IOException {
String PREFIX = "--";
String BOUNDARY = java.util.UUID.randomUUID().toString();
String 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 * 10000); // 缓存的最长时间
// conn.setFixedLengthStreamingMode(contentLength);
conn.setAllowUserInteraction(false);
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 sub = 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;
// 发送流文件数据
if (files != null) {
for (Map.Entry<String, File> file : files.entrySet()) {
StringBuilder sb1 = new StringBuilder();
sb1.append(PREFIX);
sb1.append(BOUNDARY);
sb1.append(LINEND);
sb1.append("Content-Disposition: form-data; name=\"file\"; filename=\""
+ file.getKey() + ".jpg" + "\"" + LINEND);
sb1.append("Content-Type: video/mpeg4; charset=" + CHARSET
+ LINEND);
sb1.append(LINEND);
outStream.write(sb1.toString().getBytes());
InputStream is = new FileInputStream(file.getValue());
byte[] buffer = new byte[1024 * 8];
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;
if (res == 200) {
<span style="white-space:pre"> </span>in = conn.getInputStream();
<span style="white-space:pre"> </span>int ch;
<span style="white-space:pre"> </span>su2 = new StringBuilder();
<span style="white-space:pre"> </span>while ((ch = in.read()) != -1) {
<span style="white-space:pre"> </span>su2.append((char) ch);
<span style="white-space:pre"> </span>}
}
outStream.close();
conn.disconnect();
in.close();
LogUtil.logD("返回的数据---->" + su2 + "");
return true;
}
return false;
}
最后根据返回的boolean值判断上传成功与否，成功返回的数据在sb2中