从HttpServletRequest 对象获取String数据
public static String readData(HttpServletRequest request){
BufferedReader br = null;
try {
StringBuilder result = new StringBuilder();
br = request.getReader();
for (String line ; ( line = br.readLine()) != null ;){
if(result.length() > 0) {
result.append("\n");
}
result.append(line);
}
return result.toString();
} catch(IOException e) {
throw new RuntimeException();
}finally{
if(br !=null){
try {
br.close();
} catch(IOException e){
e.printStackTrace();
}
}
}
}