ToString，

ToString，

public class StreamToString {
    public static String streamToStr(InputStream inputStream, String chartSet){        StringBuilder builder=new StringBuilder();
        try {
            BufferedReader br=new BufferedReader(new InputStreamReader(inputStream,chartSet));
            String con;
            while ((con=br.readLine())!=null){
                builder.append(con);
            }            br.close();
            return builder.toString();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "";
    }
}