リクエスト中のjsonデータの取得

サンプルコード:

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;


/** * request         * @author zhangtengda * @version 1.0 * @created 2015 5 2    8:25:43 */       
public class GetRequestJsonUtils {

    /*** *    request   json        * * @param request * @return : <code>byte[]</code> * @throws IOException */
    public static String getRequestJsonString(HttpServletRequest request)
            throws IOException {
        String submitMehtod = request.getMethod();
        // GET
        if (submitMehtod.equals("GET")) {
            return new String(request.getQueryString().getBytes("iso-8859-1"),"utf-8").replaceAll("%22", "\"");
        // POST
        } else {
            return getRequestPostStr(request);
        }
    }

    /** *   :   post     byte[]    * <pre> *   ： * </pre> * @param request * @return * @throws IOException */
    public static byte[] getRequestPostBytes(HttpServletRequest request)
            throws IOException {
        int contentLength = request.getContentLength();
        if(contentLength<0){
            return null;
        }
        byte buffer[] = new byte[contentLength];
        for (int i = 0; i < contentLength;) {

            int readlen = request.getInputStream().read(buffer, i,
                    contentLength - i);
            if (readlen == -1) {
                break;
            }
            i += readlen;
        }
        return buffer;
    }

    /** *   :   post      * <pre> *   ： * </pre> * @param request * @return * @throws IOException */
    public static String getRequestPostStr(HttpServletRequest request)
            throws IOException {
        byte buffer[] = getRequestPostBytes(request);
        String charEncoding = request.getCharacterEncoding();
        if (charEncoding == null) {
            charEncoding = "UTF-8";
        }
        return new String(buffer, charEncoding);
    }

}