request 请求 转 json

package com.Utils;

import java.io.IOException;
import java.net.URLDecoder;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

public class requestUtil {
    
    
    
    /**
     * 获取 request 中 json 字符串的内容
     * 
     * @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")) {
                String str = new String(request.getQueryString().getBytes("iso-8859-1"),"utf-8").replaceAll("%22", "\"");
                String deStr = URLDecoder.decode(str);
                return getRequestGetStr(deStr);
            // POST
            } else {
                return getRequestPostStr(request);
            }
        }

        /**
         * 获取Get请求的 内容
         * @param str
         * @return
         */
        public static String getRequestGetStr(String str){
            Map map = new HashMap<>();
            String strs = str.replaceAll("&", ",");
            String st = strs.replaceAll("=", ":");
            System.out.println(st);
            String[] param = st.split(",");
            for (int i = 0; i < param.length; i++) {
                int index = param[i].indexOf(':');
                map.put(param[i].substring(0,index), param[i].substring((index + 1)));
            }
            String sts = JSONObject.toJSONString(map);
            return sts;
        }

    /**
     * 获取POST请求的 内容
     * @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);
        }

     /**
      * 获取POST请求的 byte 数组
      * @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;
        }

     /**
      * JSONArray 根据name去重复
      * @param array
      */
     public static JSONArray delRepeatIndexid(JSONArray array) {
         JSONArray arrayTemp = new JSONArray();
         int num = 0;
         for(int i = 0;i < array.size();i++){
             if(num==0){
                 arrayTemp.add(array.get(i));
             }else{
                 int numJ = 0;
                 for(int j = 0;j < arrayTemp.size(); j++){
                     JSONObject newJsonObjectI = (JSONObject)array.get(i);
                     JSONObject newJsonObjectJ = (JSONObject)arrayTemp.get(j);
                     String index_idI = newJsonObjectI.get("code").toString();
                     String valueI = newJsonObjectI.get("name").toString();
                     String index_idJ = newJsonObjectJ.get("code").toString();
                     if(index_idI.equals(index_idJ)){
                         arrayTemp.remove(j);
                         JSONObject newObject = new JSONObject();
                         newObject.put("code", index_idI);
                         newObject.put("name", valueI);
                         arrayTemp.add(newObject);
                         break;
                     }
                     numJ++;
                 }
                 if(numJ-1 == arrayTemp.size()-1){
                     arrayTemp.add(array.get(i));
                 }
             }
             num++;
         }
         return arrayTemp;
     }
     
     

    
}