这样操作可以将post的值转换成固定的编码格式
StringBuilder buffer = new StringBuilder();
BufferedReader reader = null;
try {
reader = new BufferedReader(new InputStreamReader(in,"utf-8"));
String line = null;
while ((line = reader.readLine()) != null) {
buffer.append(line);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (null != reader) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return buffer.toString();