序列化和反序列化作用（存儲數據）
純手工原創，講得不夠詳細，湊合着看吧，不嫌棄的話可以點個贊回個評論哦，有什麼不足的地方請指出，我會虛心學習的，謝謝
- 主要內容
- 序列化
- 反序列化
主要內容
最近在做一個手機棋牌遊戲的項目，我負責的是java後臺這一塊，中間就遇到一個這樣的問題---
遊戲回放的json數據要存儲到mysql
而一開始我是這樣做的，直接把C++ POST過來的json數據用List< string > 來接收，然後轉成 string字符串寫進mysql裏遊戲回放字段（varchar類型），
遊戲回放數據json格式：（主要部分）
[{
"UserData_t": [{
"Chu_Pai_Count": 0,
"Gang_Pai_Count": 0,
"HandPai": [4, 5, 6, 7, 8, 9, 11, 13, 14, 15, 16, 17, 18, 11],
"Hand_Pai_Count": 14,
"LaiZi_Count": 0,
"Men_Pai_Count": 28,
"Peng_Pai_Count": 0,
"m_BeiShu": 1,
"m_Final_Score": 0,
"m_Part_Score": 0,
"m_Player_ID": 101000,
"m_Player_Location": 0
}, {
"Chu_Pai_Count": 0,
"Gang_Pai_Count": 0,
"HandPai": [1, 2, 4, 2, 2, 2, 6, 23, 24, 25, 26, 27, 28],
"Hand_Pai_Count": 13,
"LaiZi_Count": 0,
"Men_Pai_Count": 26,
"Peng_Pai_Count": 0,
"m_BeiShu": 1,
"m_Final_Score": 0,
"m_Part_Score": 0,
"m_Player_ID": 102000,
"m_Player_Location": 1
}, {
"Chu_Pai_Count": 0,
"Gang_Pai_Count": 0,
"HandPai": [29, 16, 2, 4, 4, 5, 6, 7, 8, 9, 11, 12, 13],
"Hand_Pai_Count": 13,
"LaiZi_Count": 0,
"Men_Pai_Count": 28,
"Peng_Pai_Count": 0,
"m_BeiShu": 1,
"m_Final_Score": 0,
"m_Part_Score": 0,
"m_Player_ID": 103000,
"m_Player_Location": 2
}, {
"Chu_Pai_Count": 0,
"Gang_Pai_Count": 0,
"HandPai": [14, 6, 16, 4, 4, 19, 21, 22, 23, 24, 25, 26, 27],
"Hand_Pai_Count": 13,
"LaiZi_Count": 0,
"Men_Pai_Count": 26,
"Peng_Pai_Count": 0,
"m_BeiShu": 1,
"m_Final_Score": 0,
"m_Part_Score": 0,
"m_Player_ID": 104000,
"m_Player_Location": 3
}],
"m_ChaoTian": 19,
"m_Dice_1": 6,
"m_Dice_2": 2,
"m_LaiZi": 11,
"m_MenPai_EndIndex": 1,
"m_MenPai_EndLoc": 1,
"m_MenPai_LaiziIndex": 3,
"m_MenPai_LaiziLoc": 1,
"m_MenPai_StartIndex": 4,
"m_MenPai_StartLoc": 3,
"m_MenPai_ZhuangIndex": 2,
"m_MenPai_ZhuangLoc": 1,
"m_Zhuang_Location": 0
}, {
"Action": 1,
"ChuPai": [19, 4],
"NewHandPai": [5, 6, 7, 8, 9, 11, 11, 13, 14, 15, 16, 17, 18],
"m_ChuPai": 4,
"m_Player_Location": 0,
"m_User_ID": 101000
}, {
"Action": 2,
"NewHandPai": [2, 5, 6, 7, 8, 9, 11, 12, 13, 16, 29],
"PengPai": [4],
"m_Desk_ID": 120434,
"m_PengPai": 4,
"m_Player_Location": 2,
"m_User_ID": 103000
}, {
"Action": 12,
"ChuPai": [19],
"NewHandPai": [5, 6, 7, 8, 9, 11, 11, 13, 14, 15, 16, 17, 18],
"m_Desk_ID": 120434,
"m_PengPai": 4,
"m_Player_Location": 0,
"m_User_ID": 101000
}, {
"Action": 1,
"ChuPai": [2],
"NewHandPai": [5, 6, 7, 8, 9, 11, 12, 13, 16, 29],
"PengPai": [4],
"m_ChuPai": 2,
"m_Player_Location": 2,
"m_User_ID": 103000
}, {
"Action": 0,
"MenPaiCount": [28, 21, 0, 4],
"NewHandPai": [4, 4, 6, 14, 16, 19, 21, 21, 22, 23, 24, 25, 26, 27],
"m_GangPai_Count": 0,
"m_Player_Loacation": 3,
"m_User_ID": 104000,
"m_ZhuaPai": 21
}, {
"Action": 11
}]
後來用api調試工具postman獲取到的數據：（主要部分）
[{
UserData_t=[{
Chu_Pai_Count=0,
Gang_Pai_Count=0,
HandPai=[4,5,6,7,8,9,11,13,14,15,16,17,18,11],
Hand_Pai_Count=14,
LaiZi_Count=0,
Men_Pai_Count=28,
Peng_Pai_Count=0,
m_BeiShu=1,
m_Final_Score=0,
m_Part_Score=0,
m_Player_ID=101000,
m_Player_Location=0
},{
Chu_Pai_Count=0,
Gang_Pai_Count=0,
HandPai=[1,2,4,2,2,2,6,23,24,25,26,27,28],
Hand_Pai_Count=13,
LaiZi_Count=0,
Men_Pai_Count=26,
Peng_Pai_Count=0,
m_BeiShu=1,
m_Final_Score=0,
m_Part_Score=0,
m_Player_ID=102000,
m_Player_Location=1
},{
Chu_Pai_Count=0,
Gang_Pai_Count=0,
HandPai=[29,16,2,4,4,5,6,7,8,9,11,12,13],
Hand_Pai_Count=13,
LaiZi_Count=0,
Men_Pai_Count=28,
Peng_Pai_Count=0,
m_BeiShu=1,
m_Final_Score=0,
m_Part_Score=0,
m_Player_ID=103000,
m_Player_Location=2
},{
Chu_Pai_Count=0,
Gang_Pai_Count=0,
HandPai=[14,6,16,4,4,19,21,22,23,24,25,26,27],
Hand_Pai_Count=13,
LaiZi_Count=0,
Men_Pai_Count=26,
Peng_Pai_Count=0,
m_BeiShu=1,
m_Final_Score=0,
m_Part_Score=0,
m_Player_ID=104000,
m_Player_Location=3
}],
m_ChaoTian=19,
m_Dice_1=6,
m_Dice_2=2,
m_LaiZi=11,
m_MenPai_EndIndex=1,
m_MenPai_EndLoc=1,
m_MenPai_LaiziIndex=3,
m_MenPai_LaiziLoc=1,
m_MenPai_StartIndex=4,
m_MenPai_StartLoc=3,
m_MenPai_ZhuangIndex=2,
m_MenPai_ZhuangLoc=1,
m_Zhuang_Location=0
},{
Action=1,
ChuPai=[19,4],
NewHandPai=[5,6,7,8,9,11,11,13,14,15,16,17,18],
m_ChuPai=4,
m_Player_Location=0,
m_User_ID=101000
},{
Action=2,
NewHandPai=[2,5,6,7,8,9,11,12,13,16,29],
PengPai=[4],
m_Desk_ID=120434,
m_PengPai=4,
m_Player_Location=2,
m_User_ID=103000
},{
Action=12,
ChuPai=[19],
NewHandPai=[5,6,7,8,9,11,11,13,14,15,16,17,18],
m_Desk_ID=120434,
m_PengPai=4,
m_Player_Location=0,
m_User_ID=101000
},{
Action=1,
ChuPai=[2],
NewHandPai=[5,6,7,8,9,11,12,13,16,29],
PengPai=[4],
m_ChuPai=2,
m_Player_Location=2,
m_User_ID=103000
},{
Action=0,
MenPaiCount=[28,21,0,4],
NewHandPai=[4,4,6,14,16,19,21,21,22,23,24,25,26,27],
m_GangPai_Count=0,
m_Player_Loacation=3,
m_User_ID=104000,
m_ZhuaPai=21
},{
Action=11
}]
我們可以看到前後的區別，前者的 “ 消失了 和 ：變成了 後者的=，顯而易見，數據發生的變化，後者的數據無法被客戶端正常解析或解析難度大（C++ 服務端 通過post java後端 把數據寫進 mysql數據庫，app客戶端 通過post請求獲取 數據 ，然後解析數據 做成遊戲回放 ） ，嗯，這樣存數據是行不通的。
後來我找到的解決方法，就是先把json數據序列化後再存進mysql數據庫，此時數據庫字段類型應改爲blob類型（底層byte[]存儲）,
當客戶端獲取時，後臺從mysql數據庫獲取到json數據，再把json數據反序列化後再返回給客戶端。
Hutool 一個小而全的Java工具類庫(推薦使用);
序列化
//方法一
Object gamePlayback = (Object) map.get("json");
ByteArrayOutputStream out = new ByteArrayOutputStream();
ObjectOutputStream outputStream = new ObjectOutputStream(out);
outputStream.writeObject(gamePlayback);
byte[] bytes = out.toByteArray();
outputStream.close();
//方法二
// Hutool工具類庫
import cn.hutool.core.util.ObjectUtil;
Object gamePlayback = (Object) map.get("json");
byte[] bytes = ObjectUtil.unserialize(gamePlayback);
最後把bytes存數據庫
反序列化
//方法一
ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes);
ObjectInputStream in = new ObjectInputStream(byteArrayInputStream);
Object gamePlayback = (Object) in.readObject();
in.close();
//方法二
// Hutool工具類庫
import cn.hutool.core.util.ObjectUtil;
Object gamePlayback = ObjectUtil.serialize(bytes)
最後把gamePlayback 返回給app客戶端
數據如下：（配圖）
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