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using System;
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using System.Collections.Generic;
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using System.Text.Json;
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namespace Admin.Core.Common
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{
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public class JsonHelper
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{
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/// <summary>
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/// 转换对象为JSON格式数据
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/// </summary>
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/// <typeparam name="T">类</typeparam>
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/// <param name="obj">对象</param>
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/// <returns>字符格式的JSON数据</returns>
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public static string GetJSON<T>(object obj)
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{
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string result = String.Empty;
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try
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{
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JsonSerializer.Serialize("");
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System.Runtime.Serialization.Json.DataContractJsonSerializer serializer =
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new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(T));
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using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
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{
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serializer.WriteObject(ms, obj);
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result = System.Text.Encoding.UTF8.GetString(ms.ToArray());
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}
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}
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catch (Exception)
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{
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throw;
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}
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return result;
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}
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/// <summary>
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/// 从一个对象信息生成Json串
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/// </summary>
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/// <param name="obj"></param>
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/// <returns></returns>
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public static string ObjectToJson(object obj)
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{
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return Newtonsoft.Json.JsonConvert.SerializeObject(obj);
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}
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/// <summary>
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/// 从一个Json串生成对象信息
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/// </summary>
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/// <param name="jsonString"></param>
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/// <param name="obj"></param>
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/// <returns></returns>
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public static object JsonToObject(string jsonString, object obj)
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{
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return Newtonsoft.Json.JsonConvert.DeserializeObject(jsonString, obj.GetType());
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}
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/// <summary>
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/// 转换List<T>的数据为JSON格式
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/// </summary>
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/// <typeparam name="T">类</typeparam>
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/// <param name="vals">列表值</param>
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/// <returns>JSON格式数据</returns>
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public string JSON<T>(List<T> vals)
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{
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System.Text.StringBuilder st = new System.Text.StringBuilder();
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try
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{
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System.Runtime.Serialization.Json.DataContractJsonSerializer s = new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(T));
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foreach (T city in vals)
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{
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using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
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{
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s.WriteObject(ms, city);
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st.Append(System.Text.Encoding.UTF8.GetString(ms.ToArray()));
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}
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}
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}
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catch (Exception)
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{
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}
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return st.ToString();
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}
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/// <summary>
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/// JSON格式字符转换为T类型的对象
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="jsonStr"></param>
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/// <returns></returns>
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public static T ParseFormByJson<T>(string jsonStr)
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{
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T obj = Activator.CreateInstance<T>();
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using (System.IO.MemoryStream ms =
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new System.IO.MemoryStream(System.Text.Encoding.UTF8.GetBytes(jsonStr)))
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{
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System.Runtime.Serialization.Json.DataContractJsonSerializer serializer =
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new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(T));
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return (T)serializer.ReadObject(ms);
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}
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}
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public string JSON1<SendData>(List<SendData> vals)
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{
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System.Text.StringBuilder st = new System.Text.StringBuilder();
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try
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{
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System.Runtime.Serialization.Json.DataContractJsonSerializer s = new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(SendData));
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foreach (SendData city in vals)
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{
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using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
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{
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s.WriteObject(ms, city);
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st.Append(System.Text.Encoding.UTF8.GetString(ms.ToArray()));
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}
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}
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}
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catch (Exception)
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{
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}
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return st.ToString();
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}
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private static bool IsJsonStart(ref string json)
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{
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if (!string.IsNullOrEmpty(json))
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{
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json = json.Trim('\r', '\n', ' ');
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if (json.Length > 1)
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{
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char s = json[0];
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char e = json[json.Length - 1];
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return (s == '{' && e == '}') || (s == '[' && e == ']');
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}
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}
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return false;
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}
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public static bool IsJson(string json)
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{
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int errIndex;
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return IsJson(json, out errIndex);
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}
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public static bool IsJson(string json, out int errIndex)
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{
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errIndex = 0;
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if (IsJsonStart(ref json))
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{
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CharState cs = new CharState();
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char c;
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for (int i = 0; i < json.Length; i++)
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{
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c = json[i];
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if (SetCharState(c, ref cs) && cs.childrenStart)//设置关键符号状态。
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{
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string item = json.Substring(i);
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int err;
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int length = GetValueLength(item, true, out err);
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cs.childrenStart = false;
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if (err > 0)
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{
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errIndex = i + err;
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return false;
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}
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i = i + length - 1;
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}
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if (cs.isError)
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{
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errIndex = i;
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return false;
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}
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}
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return !cs.arrayStart && !cs.jsonStart;
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}
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return false;
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}
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/// <summary>
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/// 获取值的长度（当Json值嵌套以"{"或"["开头时）
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/// </summary>
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private static int GetValueLength(string json, bool breakOnErr, out int errIndex)
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{
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errIndex = 0;
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int len = 0;
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if (!string.IsNullOrEmpty(json))
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{
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CharState cs = new CharState();
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char c;
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for (int i = 0; i < json.Length; i++)
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{
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c = json[i];
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if (!SetCharState(c, ref cs))//设置关键符号状态。
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{
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if (!cs.jsonStart && !cs.arrayStart)//json结束，又不是数组，则退出。
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{
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break;
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}
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}
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else if (cs.childrenStart)//正常字符，值状态下。
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{
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int length = GetValueLength(json.Substring(i), breakOnErr, out errIndex);//递归子值，返回一个长度。。。
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cs.childrenStart = false;
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cs.valueStart = 0;
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//cs.state = 0;
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i = i + length - 1;
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}
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if (breakOnErr && cs.isError)
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{
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errIndex = i;
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return i;
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}
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if (!cs.jsonStart && !cs.arrayStart)//记录当前结束位置。
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{
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len = i + 1;//长度比索引+1
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break;
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}
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}
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}
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return len;
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}
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/// <summary>
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/// 设置字符状态(返回true则为关键词，返回false则当为普通字符处理）
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/// </summary>
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private static bool SetCharState(char c, ref CharState cs)
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{
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cs.CheckIsError(c);
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switch (c)
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{
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case '{'://[{ "[{A}]":[{"[{B}]":3,"m":"C"}]}]
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#region 大括号
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if (cs.keyStart <= 0 && cs.valueStart <= 0)
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{
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cs.keyStart = 0;
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cs.valueStart = 0;
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if (cs.jsonStart && cs.state == 1)
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{
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cs.childrenStart = true;
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}
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else
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{
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cs.state = 0;
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}
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cs.jsonStart = true;//开始。
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return true;
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}
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#endregion
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break;
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case '}':
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#region 大括号结束
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if (cs.keyStart <= 0 && cs.valueStart < 2 && cs.jsonStart)
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{
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cs.jsonStart = false;//正常结束。
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cs.state = 0;
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cs.keyStart = 0;
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cs.valueStart = 0;
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cs.setDicValue = true;
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return true;
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}
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// cs.isError = !cs.jsonStart && cs.state == 0;
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#endregion
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break;
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case '[':
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#region 中括号开始
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if (!cs.jsonStart)
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{
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cs.arrayStart = true;
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return true;
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}
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else if (cs.jsonStart && cs.state == 1)
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{
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cs.childrenStart = true;
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return true;
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}
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#endregion
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break;
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case ']':
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#region 中括号结束
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if (cs.arrayStart && !cs.jsonStart && cs.keyStart <= 2 && cs.valueStart <= 0)//[{},333]//这样结束。
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{
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cs.keyStart = 0;
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cs.valueStart = 0;
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cs.arrayStart = false;
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return true;
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}
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#endregion
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break;
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case '"':
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case '\'':
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#region 引号
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if (cs.jsonStart || cs.arrayStart)
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{
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if (cs.state == 0)//key阶段,有可能是数组["aa",{}]
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{
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if (cs.keyStart <= 0)
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{
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cs.keyStart = (c == '"' ? 3 : 2);
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return true;
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}
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else if ((cs.keyStart == 2 && c == '\'') || (cs.keyStart == 3 && c == '"'))
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{
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if (!cs.escapeChar)
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{
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cs.keyStart = -1;
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|
|
|
return true;
|
|
|
|
|
|
}
|
|
|
|
|
|
else
|
|
|
|
|
|
{
|
|
|
|
|
|
cs.escapeChar = false;
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
else if (cs.state == 1 && cs.jsonStart)//值阶段必须是Json开始了。
|
|
|
|
|
|
{
|
|
|
|
|
|
if (cs.valueStart <= 0)
|
|
|
|
|
|
{
|
|
|
|
|
|
cs.valueStart = (c == '"' ? 3 : 2);
|
|
|
|
|
|
return true;
|
|
|
|
|
|
}
|
|
|
|
|
|
else if ((cs.valueStart == 2 && c == '\'') || (cs.valueStart == 3 && c == '"'))
|
|
|
|
|
|
{
|
|
|
|
|
|
if (!cs.escapeChar)
|
|
|
|
|
|
{
|
|
|
|
|
|
cs.valueStart = -1;
|
|
|
|
|
|
return true;
|
|
|
|
|
|
}
|
|
|
|
|
|
else
|
|
|
|
|
|
{
|
|
|
|
|
|
cs.escapeChar = false;
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
#endregion
|
|
|
|
|
|
break;
|
|
|
|
|
|
case ':':
|
|
|
|
|
|
#region 冒号
|
|
|
|
|
|
if (cs.jsonStart && cs.keyStart < 2 && cs.valueStart < 2 && cs.state == 0)
|
|
|
|
|
|
{
|
|
|
|
|
|
if (cs.keyStart == 1)
|
|
|
|
|
|
{
|
|
|
|
|
|
cs.keyStart = -1;
|
|
|
|
|
|
}
|
|
|
|
|
|
cs.state = 1;
|
|
|
|
|
|
return true;
|
|
|
|
|
|
}
|
|
|
|
|
|
// cs.isError = !cs.jsonStart || (cs.keyStart < 2 && cs.valueStart < 2 && cs.state == 1);
|
|
|
|
|
|
#endregion
|
|
|
|
|
|
break;
|
|
|
|
|
|
case ',':
|
|
|
|
|
|
#region 逗号 //["aa",{aa:12,}]
|
|
|
|
|
|
|
|
|
|
|
|
if (cs.jsonStart)
|
|
|
|
|
|
{
|
|
|
|
|
|
if (cs.keyStart < 2 && cs.valueStart < 2 && cs.state == 1)
|
|
|
|
|
|
{
|
|
|
|
|
|
cs.state = 0;
|
|
|
|
|
|
cs.keyStart = 0;
|
|
|
|
|
|
cs.valueStart = 0;
|
|
|
|
|
|
//if (cs.valueStart == 1)
|
|
|
|
|
|
//{
|
|
|
|
|
|
// cs.valueStart = 0;
|
|
|
|
|
|
//}
|
|
|
|
|
|
cs.setDicValue = true;
|
|
|
|
|
|
return true;
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
else if (cs.arrayStart && cs.keyStart <= 2)
|
|
|
|
|
|
{
|
|
|
|
|
|
cs.keyStart = 0;
|
|
|
|
|
|
//if (cs.keyStart == 1)
|
|
|
|
|
|
//{
|
|
|
|
|
|
// cs.keyStart = -1;
|
|
|
|
|
|
//}
|
|
|
|
|
|
return true;
|
|
|
|
|
|
}
|
|
|
|
|
|
#endregion
|
|
|
|
|
|
break;
|
|
|
|
|
|
case ' ':
|
|
|
|
|
|
case '\r':
|
|
|
|
|
|
case '\n'://[ "a",\r\n{} ]
|
|
|
|
|
|
case '\0':
|
|
|
|
|
|
case '\t':
|
|
|
|
|
|
if (cs.keyStart <= 0 && cs.valueStart <= 0) //cs.jsonStart &&
|
|
|
|
|
|
{
|
|
|
|
|
|
return true;//跳过空格。
|
|
|
|
|
|
}
|
|
|
|
|
|
break;
|
|
|
|
|
|
default: //值开头。。
|
|
|
|
|
|
if (c == '\\') //转义符号
|
|
|
|
|
|
{
|
|
|
|
|
|
if (cs.escapeChar)
|
|
|
|
|
|
{
|
|
|
|
|
|
cs.escapeChar = false;
|
|
|
|
|
|
}
|
|
|
|
|
|
else
|
|
|
|
|
|
{
|
|
|
|
|
|
cs.escapeChar = true;
|
|
|
|
|
|
return true;
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
else
|
|
|
|
|
|
{
|
|
|
|
|
|
cs.escapeChar = false;
|
|
|
|
|
|
}
|
|
|
|
|
|
if (cs.jsonStart || cs.arrayStart) // Json 或数组开始了。
|
|
|
|
|
|
{
|
|
|
|
|
|
if (cs.keyStart <= 0 && cs.state == 0)
|
|
|
|
|
|
{
|
|
|
|
|
|
cs.keyStart = 1;//无引号的
|
|
|
|
|
|
}
|
|
|
|
|
|
else if (cs.valueStart <= 0 && cs.state == 1 && cs.jsonStart)//只有Json开始才有值。
|
|
|
|
|
|
{
|
|
|
|
|
|
cs.valueStart = 1;//无引号的
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
break;
|
|
|
|
|
|
}
|
|
|
|
|
|
return false;
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// 字符状态
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public class CharState
|
|
|
|
|
|
{
|
|
|
|
|
|
internal bool jsonStart = false;//以 "{"开始了...
|
|
|
|
|
|
internal bool setDicValue = false;// 可以设置字典值了。
|
|
|
|
|
|
internal bool escapeChar = false;//以"\"转义符号开始了
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// 数组开始【仅第一开头才算】，值嵌套的以【childrenStart】来标识。
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
internal bool arrayStart = false;//以"[" 符号开始了
|
|
|
|
|
|
internal bool childrenStart = false;//子级嵌套开始了。
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// 【0 初始状态，或 遇到“,”逗号】；【1 遇到“：”冒号】
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
internal int state = 0;
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// 【-1 取值结束】【0 未开始】【1 无引号开始】【2 单引号开始】【3 双引号开始】
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
internal int keyStart = 0;
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// 【-1 取值结束】【0 未开始】【1 无引号开始】【2 单引号开始】【3 双引号开始】
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
internal int valueStart = 0;
|
|
|
|
|
|
internal bool isError = false;//是否语法错误。
|
|
|
|
|
|
|
|
|
|
|
|
internal void CheckIsError(char c)//只当成一级处理（因为GetLength会递归到每一个子项处理）
|
|
|
|
|
|
{
|
|
|
|
|
|
if (keyStart > 1 || valueStart > 1)
|
|
|
|
|
|
{
|
|
|
|
|
|
return;
|
|
|
|
|
|
}
|
|
|
|
|
|
//示例 ["aa",{"bbbb":123,"fff","ddd"}]
|
|
|
|
|
|
switch (c)
|
|
|
|
|
|
{
|
|
|
|
|
|
case '{'://[{ "[{A}]":[{"[{B}]":3,"m":"C"}]}]
|
|
|
|
|
|
isError = jsonStart && state == 0;//重复开始错误 同时不是值处理。
|
|
|
|
|
|
break;
|
|
|
|
|
|
case '}':
|
|
|
|
|
|
isError = !jsonStart || (keyStart != 0 && state == 0);//重复结束错误 或者 提前结束{"aa"}。正常的有{}
|
|
|
|
|
|
break;
|
|
|
|
|
|
case '[':
|
|
|
|
|
|
isError = arrayStart && state == 0;//重复开始错误
|
|
|
|
|
|
break;
|
|
|
|
|
|
case ']':
|
|
|
|
|
|
isError = !arrayStart || jsonStart;//重复开始错误 或者 Json 未结束
|
|
|
|
|
|
break;
|
|
|
|
|
|
case '"':
|
|
|
|
|
|
case '\'':
|
|
|
|
|
|
isError = !(jsonStart || arrayStart); //json 或数组开始。
|
|
|
|
|
|
if (!isError)
|
|
|
|
|
|
{
|
|
|
|
|
|
//重复开始 [""",{"" "}]
|
|
|
|
|
|
isError = (state == 0 && keyStart == -1) || (state == 1 && valueStart == -1);
|
|
|
|
|
|
}
|
|
|
|
|
|
if (!isError && arrayStart && !jsonStart && c == '\'')//['aa',{}]
|
|
|
|
|
|
{
|
|
|
|
|
|
isError = true;
|
|
|
|
|
|
}
|
|
|
|
|
|
break;
|
|
|
|
|
|
case ':':
|
|
|
|
|
|
isError = !jsonStart || state == 1;//重复出现。
|
|
|
|
|
|
break;
|
|
|
|
|
|
case ',':
|
|
|
|
|
|
isError = !(jsonStart || arrayStart); //json 或数组开始。
|
|
|
|
|
|
if (!isError)
|
|
|
|
|
|
{
|
|
|
|
|
|
if (jsonStart)
|
|
|
|
|
|
{
|
|
|
|
|
|
isError = state == 0 || (state == 1 && valueStart > 1);//重复出现。
|
|
|
|
|
|
}
|
|
|
|
|
|
else if (arrayStart)//["aa,] [,] [{},{}]
|
|
|
|
|
|
{
|
|
|
|
|
|
isError = keyStart == 0 && !setDicValue;
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
break;
|
|
|
|
|
|
case ' ':
|
|
|
|
|
|
case '\r':
|
|
|
|
|
|
case '\n'://[ "a",\r\n{} ]
|
|
|
|
|
|
case '\0':
|
|
|
|
|
|
case '\t':
|
|
|
|
|
|
break;
|
|
|
|
|
|
default: //值开头。。
|
|
|
|
|
|
isError = (!jsonStart && !arrayStart) || (state == 0 && keyStart == -1) || (valueStart == -1 && state == 1);//
|
|
|
|
|
|
break;
|
|
|
|
|
|
}
|
|
|
|
|
|
//if (isError)
|
|
|
|
|
|
//{
|
|
|
|
|
|
|
|
|
|
|
|
//}
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
