Android 通过httppost上传文本文件到服务器的实例代码

/**
* 往服务器上上传文本 比如log日志
* @param urlstr 请求的url 
* @param uploadFile log日志的路径 
* /mnt/shell/emulated/0/LOG/LOG.log 
* @param newName log日志的名字 LOG.log
* @return
*/
public static void httpPost(Activity activity,String urlstr,String uploadFile,String newName) {
LogUtil.info("getEhttpPostt", "urlstr="+urlstr+";uploadFile="+uploadFile+";newName="+newName,"i");
String end = "\r\n";
String twoHyphens = "--";
String boundary = "*****";//边界标识 
int TIME_OUT = 10*1000; //超时时间
HttpURLConnection con = null; 
DataOutputStream ds = null; 
InputStream is = null;
try {
URL url = new URL(urlstr);
con = (HttpURLConnection) url.openConnection();
con.setReadTimeout(TIME_OUT);
con.setConnectTimeout(TIME_OUT);
/* 允许Input、Output，不使用Cache */
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);
// 设置http连接属性
con.setRequestMethod("POST");//请求方式
con.setRequestProperty("Connection", "Keep-Alive");//在一次TCP连接中可以持续发送多份数据而不会断开连接
con.setRequestProperty("Charset", "UTF-8");//设置编码
con.setRequestProperty("Content-Type",//multipart/form-data能上传文件的编码格式
"multipart/form-data;boundary=" + boundary);
ds = new DataOutputStream(con.getOutputStream());
ds.writeBytes(twoHyphens + boundary + end);
ds.writeBytes("Content-Disposition: form-data; "
+ "name=\"stblog\";filename=\"" + newName + "\"" + end);
ds.writeBytes(end);
// 取得文件的FileInputStream
FileInputStream fStream = new FileInputStream(uploadFile);
/* 设置每次写入1024bytes */
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
int length = -1;
/* 从文件读取数据至缓冲区 */
while ((length = fStream.read(buffer)) != -1) {
/* 将资料写入DataOutputStream中 */
ds.write(buffer, 0, length);
}
ds.writeBytes(end);
ds.writeBytes(twoHyphens + boundary + twoHyphens + end);//结束
fStream.close();
ds.flush();
/* 取得Response内容 */
is = con.getInputStream();
int ch;
StringBuffer b = new StringBuffer();
while ((ch = is.read()) != -1) {
b.append((char) ch);
}
/* 将Response显示于Dialog */
showDialog(activity,true,uploadFile,"上传成功" + b.toString().trim());
} catch (Exception e) {
showDialog(activity,false,uploadFile,"上传失败" + e);
}finally {
/* 关闭DataOutputStream */
if(ds!=null){
try {
ds.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (is != null) {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (con != null) {
con.disconnect();
}
}
}
/* 显示Dialog的method */
private static void showDialog(final Activity activity,final Boolean isSuccess,final String uploadFile,final String mess) {
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
new AlertDialog.Builder(activity).setTitle("Message")
.setMessage(mess)
.setNegativeButton("确定", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
File file = new File(uploadFile);
if(file.exists()&&isSuccess){//日志文件存在且上传日志成功
file.delete();
Toast.makeText(activity, "log日志已删除", Toast.LENGTH_SHORT).show();
}
}
}).show();
}
});
}