Servlet里面request处理外部POST请求的输入流的工具类

package etcom.servlet;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import javax.servlet.http.HttpServletRequest;

public class IoToJsonUtils {

    public static String getIoToJson(HttpServletRequest request,String code){
        String jsonString = null;
        try {
            InputStream in = request.getInputStream();
            InputStreamReader isr = new InputStreamReader(in,code);
            BufferedReader reader = new BufferedReader(isr);
            String inputString = null;
            StringBuffer stringBuffer = new StringBuffer();
            while ((inputString = reader.readLine()) != null) {
                stringBuffer.append(inputString);
            }
            reader.close();
            jsonString = stringBuffer.toString();
            System.out.println(jsonString);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return jsonString;
    }

}