版权声明：该博客SunTen丿所有，侵权必究 https://blog.csdn.net/weixin_38150130/article/details/82190809
序列化和反序列化作用（存储数据）
纯手工原创，讲得不够详细，凑合着看吧，不嫌弃的话可以点个赞回个评论哦，有什么不足的地方请指出，我会虚心学习的，谢谢
- 主要内容
- 序列化
- 反序列化
主要内容
最近在做一个手机棋牌游戏的项目，我负责的是java后台这一块，中间就遇到一个这样的问题---
游戏回放的json数据要存储到mysql
而一开始我是这样做的，直接把C++ POST过来的json数据用List< string > 来接收，然后转成 string字符串写进mysql里游戏回放字段（varchar类型），
游戏回放数据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
}]
后来用api调试工具postman获取到的数据：（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
}]我们可以看到前后的区别，前者的 “ 消失了 和 ：变成了 后者的=，显而易见，数据发生的变化，后者的数据无法被客户端正常解析或解析难度大（C++ 服务端 通过post java后端 把数据写进 mysql数据库，app客户端 通过post请求获取 数据 ，然后解析数据 做成游戏回放 ） ，嗯，这样存数据是行不通的。
后来我找到的解决方法，就是先把json数据序列化后再存进mysql数据库，此时数据库字段类型应改为blob类型（底层byte[]存储）,
当客户端获取时，后台从mysql数据库获取到json数据，再把json数据反序列化后再返回给客户端。
序列化
List<Object> gamePlayback = (List<Object>) map.get("json");
ByteArrayOutputStream out = new ByteArrayOutputStream();
ObjectOutputStream outputStream = new ObjectOutputStream(out);
outputStream.writeObject(gamePlayback);
byte[] bytes = out.toByteArray();
outputStream.close();最后把bytes存数据库
反序列化
ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes);
ObjectInputStream in = new ObjectInputStream(byteArrayInputStream);
List<Object> gamePlayback = (List<Object>) in.readObject();
in.close(); 最后把gamePlayback 返回给app客户端
数据如下：（配图）
end——————————