package cn.okek.util;

import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Map.Entry; import java.util.TreeMap;

import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject;

/

讯享网

• 实用工具包
• @author 周文鹏
• @date 2014-1-21 */ public class JsonKit {

  

  /

  • 将list转为json
  • @param lists
  • @param sb
  • @return */ public static StringBuilder listToJson(List<?> lists, StringBuilder sb) { if (sb == null) sb = new StringBuilder(); sb.append("["); for (int i = 0; i < lists.size(); i++) { Object o = lists.get(i); if (o instanceof Map<?, ?>) { Map<?, ?> map = (Map<?, ?>) o; mapToJson(map, sb); } else if (o instanceof List<?>) { List<?> l = (List<?>) o; listToJson(l, sb); } else { sb.append(""" + o + """); } if (i != lists.size() - 1) sb.append(","); } sb.append("]"); return sb; }

  /

  • 将map转为json
  • @param map
  • @param sb
  • @return */ public static StringBuilder mapToJson(Map<?, ?> map, StringBuilder sb) { if (sb == null) sb = new StringBuilder(); sb.append("{"); Iterator<?> iter = map.entrySet().iterator(); while (iter.hasNext()) { Entry<?, ?> entry = (Entry<?, ?>) iter.next(); String key = entry.getKey() != null ? entry.getKey().toString() : ""; sb.append(""" + stringToJson(key) + "":"); Object o = entry.getValue(); if (o instanceof List<?>) { List<?> l = (List<?>) o; listToJson(l, sb); } else if (o instanceof Map<?, ?>) { Map<?, ?> m = (Map<?, ?>) o; mapToJson(m, sb); } else { String val = entry.getValue() != null ? entry.getValue().toString() : ""; sb.append(""" + stringToJson(val) + """); } if (iter.hasNext()) sb.append(","); } sb.append("}"); return sb; }

  /

  • 将字符串转为json数据
  • @param str 数据字符串
  • @return json字符串 */ public static String stringToJson(String str) {
    StringBuffer sb = new StringBuffer();
    for (int i = 0; i < str.length(); i++) {
    char c = str.charAt(i);
    switch © {
    case ‘"’:
    sb.append(""");
    break;
    case ‘\’:
    sb.append("\");
    break;
    case ‘/’:
    sb.append("\/");
    break;
    case ‘b’:
    sb.append("\b");
    break;
    case ‘f’:
    sb.append("\f");
    break;
    case ‘ ‘:
    sb.append("\n");
    break;
    case ’ ‘:
    sb.append("\r");
    break;
    case ’ ‘:
    sb.append("\t");
    break;
    default:
    sb.append©;
    }
    }
    return sb.toString();
    }
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    

  /

  • JsonArray转List
  • @param jsonArr
  • @return
  • @throws JSONException */ public static List<Object> jsonToList(JSONArray jsonArr) throws JSONException { List<Object> jsonToMapList = new ArrayList<Object>(); for (int i = 0; i < jsonArr.length(); i++) { Object object = jsonArr.get(i); if (object instanceof JSONArray) { jsonToMapList.add(jsonToList((JSONArray) object)); } else if (object instanceof JSONObject) { jsonToMapList.add(jsonToMap((JSONObject) object)); } else { jsonToMapList.add(object); } } return jsonToMapList; }

  /

  • JsonObject转Map
  • @param jsonObj
  • @return
  • @throws JSONException */ public static Map<String, Object> jsonToMap(JSONObject jsonObj) throws JSONException { Map<String, Object> jsonMap = new TreeMap<String, Object>(); Iterator<?> jsonKeys = jsonObj.keys(); while (jsonKeys.hasNext()) { String jsonKey = (String) jsonKeys.next(); Object jsonValObj = jsonObj.get(jsonKey); if (jsonValObj instanceof JSONArray) { jsonMap.put(jsonKey, jsonToList((JSONArray) jsonValObj)); } else if (jsonValObj instanceof JSONObject) { jsonMap.put(jsonKey, jsonToMap((JSONObject) jsonValObj)); } else { jsonMap.put(jsonKey, jsonValObj); } } return jsonMap; } }