MD5

            //客戶端所需要傳輸的資料加上key 一起傳給MD5Encode 生成MD5
            //客戶端傳輸資料的時候不傳key
            //服務端用服務端手上的key和接收到的資料再生成一個MD5來對比 以此保證資料正確
            String str= "0000";
            String clientkey = "爽膚水--MD5";
            String clientstr = str + clientkey;
            //生成MD5
            String result = AlibabaJson.MD5Encode(clientstr, "UTF-8"
 
).toUpperCase();
            System.out.println(result);

            //用接收到的資料生成一個新的MD5 與原來的MD5對比
            String checkstr = "0000";
            String serverkey = "爽膚水--MD5";
            String serverstr = checkstr + serverkey;
            System.out.print("驗證密碼是否正確:");    
            if(validatePassword(result, serverstr, "UTF-8"
 
)) {    
                System.out.println("正確");    
            }    
            else {    
                System.out.println("錯誤");    
            } 

        }

        //通過獲取引數並且生成新的MD5校驗碼 然後和 獲取到的MD5校驗碼 對比 以此驗證傳過來的資料是否被修改
        public static boolean validatePassword(String origin, String inputString, String charsetname){    
            if
 
(origin.equals(MD5Encode(inputString,charsetname).toUpperCase())){    
                return true;    
            } else{    
                return false;    
            }    
        } 

        //通過獲取資料來生成MD5驗證碼   charsetname為"UTF-8"編碼比較好
        public static String MD5Encode(String origin, String charsetname) {
            String resultString = null;
            try {
                resultString = new String(origin);
                MessageDigest md = MessageDigest.getInstance("MD5");
                byte[] digestString = md.digest(resultString.getBytes(charsetname));
                if (charsetname == null || "".equals(charsetname))
                    resultString = byteArrayToHexString(digestString);
                else
                    resultString = byteArrayToHexString(digestString);
            } catch (Exception exception) {
            }
            return resultString;
        }

        //生成MD5序列的邏輯
        private static String byteArrayToHexString(byte b[]) {
            StringBuffer resultSb = new StringBuffer();
            String byteToHex = null;
            for (int i = 0; i < b.length; i++){
                byteToHex = byteToHexString(b[i]);
                resultSb.append(byteToHex);
            }
            return resultSb.toString();
        }

        //邏輯中每一位資料 在這裡對應轉換成兩個字元
        private static String byteToHexString(byte b) {
            int n = b;
            if (n < 0)
                n += 256;
            int d1 = n / 16;
            int d2 = n % 16;
            return hexDigits[d1] + hexDigits[d2];
        }

        //轉換字元的集合 這裡可以根據自己喜好改一下順序 達到改變生成的MD5的結果的作用 慢慢試 估計可能可以清楚順序的
        private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5",
                "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };

阿里JSON

    private static void jsonToJSONObject() {
        System.out.println("------------------jsonToJSONObject-----------------");
        String json = "{\"id\":1,\"name\":\"Dylan\"}";
        JSONObject jsonObject = JSON.parseObject(json);
        System.out.println(jsonObject.getInteger("id")+":"+jsonObject.getString("name"));


    }
     //json字串轉JSONArray
        private static void jsonToJSONArray() {
            System.out.println("------------------jsonToJSONArray------------------");
            String json="{users:[{\"id\":1,\"name\":\"關公\"},{\"id\":2,\"name\":\"狗王\"}]}";
            String json2="[{\"id\":1,\"name\":\"關公\"},{\"id\":2,\"name\":\"狗王\"}]";
            JSONObject parseObject = JSON.parseObject(json);
            Map<String, List> map = JSON.parseObject(json, Map.class);
            List map3 = JSON.parseObject(json2, List.class);
            System.out.println("``````````````````````");
            System.out.println(map3);
            System.out.println("``````````````````````");
            System.out.println(map);
            for (Map.Entry<String, List> entry : map.entrySet()) {
                System.out.println(entry.getValue());
                 List<User> userList = JSON.parseArray(entry.getValue().toString(), User.class);
                 System.out.println(userList);
                 for (User user:userList){
                     System.out.println(user.getId()+":"+user.getName());
                 }
                 System.out.println(entry.getKey());

            }
            JSONObject parse = (JSONObject)JSON.parse(json);
            System.out.println(parseObject);
            System.out.println(parse);
            String jsonArray = parseObject.getJSONArray("users").toString();
            List<User> userList = JSON.parseArray(jsonArray, User.class);
            for (User user:userList){
                System.out.println(user.getId()+":"+user.getName());
            }


        }


        private static void mapToJson() {
            System.out.println("-------------------mapToJson--------------------------");
            Organization organization = new Organization();
            organization.setId(1);
            organization.setName("研發部");
            User user1 = new User();
            user1.setId(1);
            user1.setName("愛迪生");
            User user2 = new User();
            user2.setId(2);
            user2.setName("科比1");
            organization.getUserList().add(user1);
            organization.getUserList().add(user2);

            Map<String,Object> orgMap = new HashMap<String,Object>();
            orgMap.put("orgId",organization.getId());
            orgMap.put("orgName",organization.getName());
            orgMap.put("userList",organization.getUserList());

            String json = JSON.toJSONString(orgMap);
            System.out.println(json);

        }
        private static void beanToJson() {
            User user = new User();
            user.setId(1);
            user.setName("測試！！");
            String jsonString = JSON.toJSONString(user);
            System.out.println(jsonString);
        }

        private static void jsonToBean() {
            User user = new User();
            user.setId(1);
            user.setName("測試！！");
            String jsonString = JSON.toJSONString(user);
            System.out.println(jsonString);
            User u = JSON.parseObject(jsonString,User.class);
            System.out.println(u.toString());

        }