DotNet中用到的加密算法总结[转]
1
public class CryptUtil
2
{
3
public static string DecryptString(string input)
4
{
5 if (input.Equals(string.Empty))
6 {
7 return input;
8
}
9
10 byte[] byKey = {0x63, 0x68, 0x65, 0x6E, 0x79, 0x75, 0x61, 0x6E};
11 byte[] IV = {0xFE, 0xDC, 0xBA, 0x98, 0x76, 0x54, 0x32, 0x10};
12 byte[] inputByteArray = new Byte[input.Length];
13 DESCryptoServiceProvider des = new DESCryptoServiceProvider();
14 inputByteArray = Convert.FromBase64String(input);
15 MemoryStream ms = new MemoryStream();
16 CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);
17 cs.Write(inputByteArray, 0, inputByteArray.Length);
18 cs.FlushFinalBlock();
19 Encoding encoding = new UTF8Encoding();
20 return encoding.GetString(ms.ToArray());
21 }
22
23 public static string EncryptString(string input)
24 {
25 if (input.Equals(string.Empty))
26 {
27 return input;
28 }
29
30 byte[] byKey = {0x63, 0x68, 0x65, 0x6E, 0x79, 0x75, 0x61, 0x6E};
31 byte[] IV = {0xFE, 0xDC, 0xBA, 0x98, 0x76, 0x54, 0x32, 0x10};
32 DESCryptoServiceProvider des = new DESCryptoServiceProvider();
33 byte[] inputByteArray = Encoding.UTF8.GetBytes(input);
34 MemoryStream ms = new MemoryStream();
35 CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write);
36 cs.Write(inputByteArray, 0, inputByteArray.Length);
37 cs.FlushFinalBlock();
38 return Convert.ToBase64String(ms.ToArray());
39 }
40 /// <summary>
41 /// DES + Base64 加密
42 /// </summary>
43 /// <param name="input">明文字符串</param>
44 /// <returns>已加密字符串</returns>
45 public static string DesBase64Encrypt(string input)
46 {
47 System.Security.Cryptography.DES des = System.Security.Cryptography.DES.Create();
48 des.Mode = System.Security.Cryptography.CipherMode.ECB;
49 ICryptoTransform ct;
50 MemoryStream ms;
51 CryptoStream cs;
52 byte[] byt;
53 byte[] Key = new byte[8]{56,50,55,56,56,55,49,49};
54 byte[] IV = new byte[8]{0,0,0,0,0,0,0,0};
55
56 ct = des.CreateEncryptor(Key, IV);
57
58 byt = Encoding.GetEncoding("GB2312").GetBytes(input); //根据 GB2312 编码对字符串处理，转换成 byte 数组
59
60 ms = new MemoryStream();
61 cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);
62 cs.Write(byt, 0, byt.Length);
63 cs.FlushFinalBlock();
64
65 cs.Close();
66
67 byte[] answer = ms.ToArray();
68 for(int j=0;j<answer.Length;j++)
69 {
70 Console.Write(answer[j].ToString()+ " ");
71 }
72 Console.WriteLine();
73 return Convert.ToBase64String(ms.ToArray()); // 将加密的 byte 数组依照 Base64 编码转换成字符串
74 }
75
76 /// <summary>
77 /// DES + Base64 解密
78 /// </summary>
79 /// <param name="input">密文字符串</param>
80 /// <returns>解密字符串</returns>
81 public static string DesBase64Decrypt(string input)
82 {
83 System.Security.Cryptography.DES des = System.Security.Cryptography.DES.Create();
84 des.Mode = System.Security.Cryptography.CipherMode.ECB;
85 ICryptoTransform ct;
86 MemoryStream ms;
87 CryptoStream cs;
88 byte[] byt;
89 byte[] Key = new byte[8]{56,50,55,56,56,55,49,49};
90 byte[] IV = new byte[8]{0,0,0,0,0,0,0,0};
91
92 ct = des.CreateDecryptor(Key, IV);
93 byt = Convert.FromBase64String(input); // 将 密文 以 Base64 编码转换成 byte 数组
94
95 ms = new MemoryStream();
96 cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);
97 cs.Write(byt, 0, byt.Length);
98 cs.FlushFinalBlock();
99
100 cs.Close();
101
102 return Encoding.GetEncoding("GB2312").GetString(ms.ToArray()); // 将 明文 以 GB2312 编码转换成字符串
103 }
104
105
106
107 /// <summary>
108 /// DES + Base64 加密
109 /// </summary>
110 /// <param name="input">明文字符串</param>
111 /// <returns>已加密字符串</returns>
112 public static string DesBase64EncryptForID5(string input)
113 {
114 System.Security.Cryptography.DES des = System.Security.Cryptography.DES.Create();
115 des.Mode = System.Security.Cryptography.CipherMode.CBC;
116 ICryptoTransform ct;
117 MemoryStream ms;
118 CryptoStream cs;
119 byte[] byt;
120 byte[] Key = new byte[8]{56,50,55,56,56,55,49,49};
121 byte[] IV = new byte[8]{56,50,55,56,56,55,49,49};
122
123 ct = des.CreateEncryptor(Key, IV);
124
125 byt = Encoding.GetEncoding("GB2312").GetBytes(input); //根据 GB2312 编码对字符串处理，转换成 byte 数组
126
127 ms = new MemoryStream();
128 cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);
129 cs.Write(byt, 0, byt.Length);
130 cs.FlushFinalBlock();
131
132 cs.Close();
133
134 byte[] answer = ms.ToArray();
135 for(int j=0;j<answer.Length;j++)
136 {
137 Console.Write(answer[j].ToString()+ " ");
138 }
139 Console.WriteLine();
140 return Convert.ToBase64String(ms.ToArray()); // 将加密的 byte 数组依照 Base64 编码转换成字符串
141 }
142
143
144 /// <summary>
145 /// DES + Base64 解密
146 /// </summary>
147 /// <param name="input">密文字符串</param>
148 /// <returns>解密字符串</returns>
149 public static string DesBase64DecryptForID5(string input)
150 {
151 System.Security.Cryptography.DES des = System.Security.Cryptography.DES.Create();
152 des.Mode = System.Security.Cryptography.CipherMode.CBC;
153 ICryptoTransform ct;
154 MemoryStream ms;
155 CryptoStream cs;
156 byte[] byt;
157 byte[] Key = new byte[8]{56,50,55,56,56,55,49,49};
158 byte[] IV = new byte[8]{56,50,55,56,56,55,49,49};
159
160 ct = des.CreateDecryptor(Key, IV);
161 byt = Convert.FromBase64String(input); // 将 密文 以 Base64 编码转换成 byte 数组
162
163 ms = new MemoryStream();
164 cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);
165 cs.Write(byt, 0, byt.Length);
166 cs.FlushFinalBlock();
167
168 cs.Close();
169
170 return Encoding.GetEncoding("GB2312").GetString(ms.ToArray()); // 将 明文 以 GB2312 编码转换成字符串
171 }
172
173
174 /// <summary>
175 /// 3DES 加密 Byte[] to HEX string
176 /// </summary>
177 /// <param name="input">明文字符串</param>
178 /// <returns>已加密字符串</returns>
179 public static string ThreeDesEncryptHEX(string input)
180 {
181 string result = "";
182 System.Security.Cryptography.TripleDES des = System.Security.Cryptography.TripleDES.Create();
183 des.Mode = System.Security.Cryptography.CipherMode.CBC;
184 des.Padding = System.Security.Cryptography.PaddingMode.PKCS7;
185 ICryptoTransform ct;
186 MemoryStream ms;
187 CryptoStream cs;
188 byte[] byt;
189 byte[] Key = new byte[24]{
190 1,2,3,4,5,6,
191 1,2,3,4,5,6,
192 1,2,3,4,5,6,
193 1,2,3,4,5,6
194 };
195 byte[] IV = new byte[8]{1,2,3,4,5,6,1,2};
196
197 ct = des.CreateEncryptor(Key, IV);
198
199 byt = Encoding.GetEncoding("GB2312").GetBytes(input); //根据 GB2312 编码对字符串处理，转换成 byte 数组
200
201 ms = new MemoryStream();
202 cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);
203 cs.Write(byt, 0, byt.Length);
204 cs.FlushFinalBlock();
205
206 cs.Close();
207
208 byte[] answer = ms.ToArray();
209 for(int j=0;j<answer.Length;j++)
210 {
211 result += answer[j].ToString("x").PadLeft(2,'0');
212 }
213 return result;
214 }
215
216 /// <summary>
217 /// 3DES + HEX to byte[] 解密
218 /// </summary>
219 /// <param name="input">密文字符串</param>
220 /// <returns>解密字符串</returns>
221 public static string ThreeDesDecryptHEX(string input)
222 {
223 System.Security.Cryptography.TripleDES des = System.Security.Cryptography.TripleDES.Create();
224 des.Mode = System.Security.Cryptography.CipherMode.CBC;
225 des.Padding = System.Security.Cryptography.PaddingMode.PKCS7;
226 ICryptoTransform ct;
227 MemoryStream ms;
228 CryptoStream cs;
229 byte[] Key = new byte[24]{
230 1,2,3,4,5,6,
231 1,2,3,4,5,6,
232 1,2,3,4,5,6,
233 1,2,3,4,5,6
234 };
235 byte[] IV = new byte[8]{1,2,3,4,5,6,1,2};
236
237 ct = des.CreateDecryptor(Key, IV);
238 //byt = Convert.FromBase64String(input); // 将 密文 以 HEX to byte[]编码转换成 byte 数组
239 if(input.Length<=1)
240 {
241 throw new Exception("encrypted HEX string is too short!");
242 }
243 byte[] byt = new byte[input.Length/2];
244 for(int i=0;i<byt.Length;i++)
245 {
246 //Console.WriteLine(input.Substring(i*2,2));
247 byt[i] = Convert.ToByte(input.Substring(i*2,2),16);
248 }
249
250 ms = new MemoryStream();
251 cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);
252 cs.Write(byt, 0, byt.Length);
253 cs.FlushFinalBlock();
254
255 cs.Close();
256
257 return Encoding.GetEncoding("GB2312").GetString(ms.ToArray()); // 将 明文 以 GB2312 编码转换成字符串
258 }
259 /// <summary>
260 /// Base64解码
261 /// </summary>
262 /// <param name="base64Str"></param>
263 /// <returns></returns>
264 public static string DecodingFromBase64(string base64Str)
265 {
266 Byte[] bytes = Convert.FromBase64String(base64Str);
267 return System.Text.Encoding.UTF8.GetString(bytes);
268 }
269 /// <summary>
270 /// Base64编码
271 /// </summary>
272 /// <param name="str"></param>
273 /// <returns></returns>
274 public static string EncodingToBase64(string str)
275 {
276 return Convert.ToBase64String(Encoding.UTF8.GetBytes(str));
277 }
278 /// <summary>
279 /// 根据指定的编码方式Base64解码
280 /// </summary>
281 /// <param name="base64Str"></param>
282 /// <param name="strEncoding"></param>
283 /// <returns></returns>
284 public static string DecodingFromBase64(string base64Str,System.Text.Encoding strEncoding)
285 {
286 Byte[] bytes = Convert.FromBase64String(base64Str);
287 return strEncoding.GetString(bytes);
288 }
289 /// <summary>
290 /// 根据指定的编码方式Base64编码
291 /// </summary>
292 /// <param name="str"></param>
293 /// <param name="strEncoding"></param>
294 /// <returns></returns>
295 public static string EncodingToBase64(string str,System.Text.Encoding strEncoding)
296 {
297 return Convert.ToBase64String(strEncoding.GetBytes(str));
298 }
299
}
public class CryptUtil2
{
3
public static string DecryptString(string input)4
{
5
if (input.Equals(string.Empty))6
{7
return input;8
}9
10
byte[] byKey = {0x63, 0x68, 0x65, 0x6E, 0x79, 0x75, 0x61, 0x6E};11
byte[] IV = {0xFE, 0xDC, 0xBA, 0x98, 0x76, 0x54, 0x32, 0x10};12
byte[] inputByteArray = new Byte[input.Length];13
DESCryptoServiceProvider des = new DESCryptoServiceProvider();14
inputByteArray = Convert.FromBase64String(input);15
MemoryStream ms = new MemoryStream();16
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);17
cs.Write(inputByteArray, 0, inputByteArray.Length);18
cs.FlushFinalBlock();19
Encoding encoding = new UTF8Encoding();20
return encoding.GetString(ms.ToArray());21
}22
23
public static string EncryptString(string input)24
{25
if (input.Equals(string.Empty))26
{27
return input;28
}29
30
byte[] byKey = {0x63, 0x68, 0x65, 0x6E, 0x79, 0x75, 0x61, 0x6E};31
byte[] IV = {0xFE, 0xDC, 0xBA, 0x98, 0x76, 0x54, 0x32, 0x10};32
DESCryptoServiceProvider des = new DESCryptoServiceProvider();33
byte[] inputByteArray = Encoding.UTF8.GetBytes(input);34
MemoryStream ms = new MemoryStream();35
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write);36
cs.Write(inputByteArray, 0, inputByteArray.Length);37
cs.FlushFinalBlock();38
return Convert.ToBase64String(ms.ToArray());39
}40
/// <summary>41
/// DES + Base64 加密42
/// </summary>43
/// <param name="input">明文字符串</param>44
/// <returns>已加密字符串</returns>45
public static string DesBase64Encrypt(string input)46
{47
System.Security.Cryptography.DES des = System.Security.Cryptography.DES.Create();48
des.Mode = System.Security.Cryptography.CipherMode.ECB;49
ICryptoTransform ct;50
MemoryStream ms;51
CryptoStream cs;52
byte[] byt;53
byte[] Key = new byte[8]{56,50,55,56,56,55,49,49}; 54
byte[] IV = new byte[8]{0,0,0,0,0,0,0,0};55
56
ct = des.CreateEncryptor(Key, IV);57
58
byt = Encoding.GetEncoding("GB2312").GetBytes(input); //根据 GB2312 编码对字符串处理，转换成 byte 数组59
60
ms = new MemoryStream();61
cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);62
cs.Write(byt, 0, byt.Length);63
cs.FlushFinalBlock();64
65
cs.Close();66
67
byte[] answer = ms.ToArray();68
for(int j=0;j<answer.Length;j++)69
{70
Console.Write(answer[j].ToString()+ " ");71
}72
Console.WriteLine();73
return Convert.ToBase64String(ms.ToArray()); // 将加密的 byte 数组依照 Base64 编码转换成字符串74
}75
76
/// <summary>77
/// DES + Base64 解密78
/// </summary>79
/// <param name="input">密文字符串</param>80
/// <returns>解密字符串</returns>81
public static string DesBase64Decrypt(string input)82
{83
System.Security.Cryptography.DES des = System.Security.Cryptography.DES.Create();84
des.Mode = System.Security.Cryptography.CipherMode.ECB;85
ICryptoTransform ct;86
MemoryStream ms;87
CryptoStream cs;88
byte[] byt;89
byte[] Key = new byte[8]{56,50,55,56,56,55,49,49}; 90
byte[] IV = new byte[8]{0,0,0,0,0,0,0,0};91
92
ct = des.CreateDecryptor(Key, IV);93
byt = Convert.FromBase64String(input); // 将 密文 以 Base64 编码转换成 byte 数组94
95
ms = new MemoryStream();96
cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);97
cs.Write(byt, 0, byt.Length);98
cs.FlushFinalBlock();99
100
cs.Close();101
102
return Encoding.GetEncoding("GB2312").GetString(ms.ToArray()); // 将 明文 以 GB2312 编码转换成字符串103
}104
105
106
107
/// <summary>108
/// DES + Base64 加密109
/// </summary>110
/// <param name="input">明文字符串</param>111
/// <returns>已加密字符串</returns>112
public static string DesBase64EncryptForID5(string input)113
{114
System.Security.Cryptography.DES des = System.Security.Cryptography.DES.Create();115
des.Mode = System.Security.Cryptography.CipherMode.CBC;116
ICryptoTransform ct;117
MemoryStream ms;118
CryptoStream cs;119
byte[] byt;120
byte[] Key = new byte[8]{56,50,55,56,56,55,49,49}; 121
byte[] IV = new byte[8]{56,50,55,56,56,55,49,49}; 122
123
ct = des.CreateEncryptor(Key, IV);124
125
byt = Encoding.GetEncoding("GB2312").GetBytes(input); //根据 GB2312 编码对字符串处理，转换成 byte 数组126
127
ms = new MemoryStream();128
cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);129
cs.Write(byt, 0, byt.Length);130
cs.FlushFinalBlock();131
132
cs.Close();133
134
byte[] answer = ms.ToArray();135
for(int j=0;j<answer.Length;j++)136
{137
Console.Write(answer[j].ToString()+ " ");138
}139
Console.WriteLine();140
return Convert.ToBase64String(ms.ToArray()); // 将加密的 byte 数组依照 Base64 编码转换成字符串141
}142
143
144
/// <summary>145
/// DES + Base64 解密146
/// </summary>147
/// <param name="input">密文字符串</param>148
/// <returns>解密字符串</returns>149
public static string DesBase64DecryptForID5(string input)150
{151
System.Security.Cryptography.DES des = System.Security.Cryptography.DES.Create();152
des.Mode = System.Security.Cryptography.CipherMode.CBC;153
ICryptoTransform ct;154
MemoryStream ms;155
CryptoStream cs;156
byte[] byt;157
byte[] Key = new byte[8]{56,50,55,56,56,55,49,49}; 158
byte[] IV = new byte[8]{56,50,55,56,56,55,49,49}; 159
160
ct = des.CreateDecryptor(Key, IV);161
byt = Convert.FromBase64String(input); // 将 密文 以 Base64 编码转换成 byte 数组162
163
ms = new MemoryStream();164
cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);165
cs.Write(byt, 0, byt.Length);166
cs.FlushFinalBlock();167
168
cs.Close();169
170
return Encoding.GetEncoding("GB2312").GetString(ms.ToArray()); // 将 明文 以 GB2312 编码转换成字符串171
}172
173
174
/// <summary>175
/// 3DES 加密 Byte[] to HEX string176
/// </summary>177
/// <param name="input">明文字符串</param>178
/// <returns>已加密字符串</returns>179
public static string ThreeDesEncryptHEX(string input)180
{181
string result = "";182
System.Security.Cryptography.TripleDES des = System.Security.Cryptography.TripleDES.Create();183
des.Mode = System.Security.Cryptography.CipherMode.CBC;184
des.Padding = System.Security.Cryptography.PaddingMode.PKCS7;185
ICryptoTransform ct;186
MemoryStream ms;187
CryptoStream cs;188
byte[] byt;189
byte[] Key = new byte[24]{190
1,2,3,4,5,6,191
1,2,3,4,5,6,192
1,2,3,4,5,6,193
1,2,3,4,5,6194
}; 195
byte[] IV = new byte[8]{1,2,3,4,5,6,1,2};196
197
ct = des.CreateEncryptor(Key, IV);198
199
byt = Encoding.GetEncoding("GB2312").GetBytes(input); //根据 GB2312 编码对字符串处理，转换成 byte 数组200
201
ms = new MemoryStream();202
cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);203
cs.Write(byt, 0, byt.Length);204
cs.FlushFinalBlock();205
206
cs.Close();207
208
byte[] answer = ms.ToArray();209
for(int j=0;j<answer.Length;j++)210
{211
result += answer[j].ToString("x").PadLeft(2,'0');212
}213
return result;214
}215
216
/// <summary>217
/// 3DES + HEX to byte[] 解密218
/// </summary>219
/// <param name="input">密文字符串</param>220
/// <returns>解密字符串</returns>221
public static string ThreeDesDecryptHEX(string input)222
{223
System.Security.Cryptography.TripleDES des = System.Security.Cryptography.TripleDES.Create();224
des.Mode = System.Security.Cryptography.CipherMode.CBC;225
des.Padding = System.Security.Cryptography.PaddingMode.PKCS7;226
ICryptoTransform ct;227
MemoryStream ms;228
CryptoStream cs;229
byte[] Key = new byte[24]{230
1,2,3,4,5,6,231
1,2,3,4,5,6,232
1,2,3,4,5,6,233
1,2,3,4,5,6234
}; 235
byte[] IV = new byte[8]{1,2,3,4,5,6,1,2};236
237
ct = des.CreateDecryptor(Key, IV);238
//byt = Convert.FromBase64String(input); // 将 密文 以 HEX to byte[]编码转换成 byte 数组239
if(input.Length<=1)240
{241
throw new Exception("encrypted HEX string is too short!");242
}243
byte[] byt = new byte[input.Length/2];244
for(int i=0;i<byt.Length;i++)245
{246
//Console.WriteLine(input.Substring(i*2,2));247
byt[i] = Convert.ToByte(input.Substring(i*2,2),16);248
}249
250
ms = new MemoryStream();251
cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);252
cs.Write(byt, 0, byt.Length);253
cs.FlushFinalBlock();254
255
cs.Close();256
257
return Encoding.GetEncoding("GB2312").GetString(ms.ToArray()); // 将 明文 以 GB2312 编码转换成字符串258
}259
/// <summary>260
/// Base64解码261
/// </summary>262
/// <param name="base64Str"></param>263
/// <returns></returns>264
public static string DecodingFromBase64(string base64Str)265
{266
Byte[] bytes = Convert.FromBase64String(base64Str);267
return System.Text.Encoding.UTF8.GetString(bytes);268
}269
/// <summary>270
/// Base64编码271
/// </summary>272
/// <param name="str"></param>273
/// <returns></returns>274
public static string EncodingToBase64(string str)275
{276
return Convert.ToBase64String(Encoding.UTF8.GetBytes(str));277
}278
/// <summary>279
/// 根据指定的编码方式Base64解码280
/// </summary>281
/// <param name="base64Str"></param>282
/// <param name="strEncoding"></param>283
/// <returns></returns>284
public static string DecodingFromBase64(string base64Str,System.Text.Encoding strEncoding)285
{286
Byte[] bytes = Convert.FromBase64String(base64Str);287
return strEncoding.GetString(bytes);288
}289
/// <summary>290
/// 根据指定的编码方式Base64编码291
/// </summary>292
/// <param name="str"></param>293
/// <param name="strEncoding"></param>294
/// <returns></returns>295
public static string EncodingToBase64(string str,System.Text.Encoding strEncoding)296
{297
return Convert.ToBase64String(strEncoding.GetBytes(str));298
}299
}
两个常用的方法
1 /// <summary>
2 /// 通过字节数组形式的密钥获取字符串形式的密钥
3 /// </summary>
4 void GetStringByByteArray()
5 {
6 byte[] Key = new byte[8]{56,50,55,56,56,55,49,49};
7 Response.Write(System.Text.Encoding.Default.GetString(Key));
8 Response.End();
9 }
10
11 /// <summary>
12 /// 通过字符串形式的密钥获取字节数组形式的密钥
13 /// </summary>
14 void GetByteArrayByString()
15 {
16 string key = "82788711";
17 Response.Write(System.Text.Encoding.Default.GetBytes(key));
18 Response.End();
19
20 }
/// <summary>2
/// 通过字节数组形式的密钥获取字符串形式的密钥3
/// </summary>4
void GetStringByByteArray()5
{6
byte[] Key = new byte[8]{56,50,55,56,56,55,49,49}; 7
Response.Write(System.Text.Encoding.Default.GetString(Key));8
Response.End();9
}10
11
/// <summary>12
/// 通过字符串形式的密钥获取字节数组形式的密钥13
/// </summary>14
void GetByteArrayByString()15
{16
string key = "82788711";17
Response.Write(System.Text.Encoding.Default.GetBytes(key));18
Response.End();19
20
}
有这里没包括的，欢迎回复，大家一起总结一下~~
本文来自博客园，作者：古道轻风，转载请注明原文链接：https://www.cnblogs.com/88223100/archive/2008/08/05/1260778.html
