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Java按键值字典序排列

参数按照KEY值进行字典序排序(按照KEY值的ASCII码从小到大),并用&作为各参数之间的分隔符将参数拼接成字符串。这里用到了SortedMap，复制以下代码开箱即用~

    /*** getSortedString 对参数按照Key进行ASCII排序* @param jsonObject 请求参数* @return 排序拼装后的字符串*/public static String getSortedString(JSONObject jsonObject) {SortedMap<String, Object> sortMap = new TreeMap<>();StringBuilder sbf = new StringBuilder();for (Map.Entry<String, Object> objectEntry : jsonObject.entrySet()) {String key = objectEntry.getKey();Object value = objectEntry.getValue();if ("sign".equals(key)) {continue;}sortMap.put(key, value);}Set<Map.Entry<String, Object>> mapEntrySet = sortMap.entrySet();for (Map.Entry entry : mapEntrySet) {String k = (String) entry.getKey();Object v = entry.getValue();sbf.append(k).append("=").append(v).append("&");}String sbfString = sbf.toString();System.out.println("排序后的字符串：" + sbfString.substring(0, sbfString.length() - 1));return sbfString.substring(0, sbfString.length() - 1);}