c#:Json字符串转成xml对象
没看到.net framework中有这样的功能， 懒得到处找了， 索性花点时间自己写一个
/*
* Created by SharpDevelop.
* Date: 2013/6/24
* User: sliencer
* Time: 21:54
*
* To change this template use Tools | Options | Coding | Edit Standard Headers.
*/
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Xml; namespace JsonDecoder
{
class Program
{
public static void Main(string[] args)
{
int i=;
foreach (String element in inputs) {
JS_Value v=JsonDecoder.Decode(element);
if (v == null)
throw Error.InvalidJsonStream;
String s=v.ToString();
XmlWriterSettings settings =new XmlWriterSettings();
settings.Indent = true;
settings.Encoding = Encoding.UTF8;
XmlWriter wri = XmlWriter.Create("Output" + (i++) + ".xml", settings);
v.ToXml(wri, true, "JSon");
wri.Close();
}
}
static String[] inputs=new string[]{
/*自己找几个json测试一下， 我的是从网站随便找来的， 担心版权问题， 就去掉了*/
@"""test1""", @"""test2""", @"""test3"""
};
}
public abstract class JS_Value
{
public abstract void ToXml(XmlWriter p_wri, bool p_bCreateElement, String p_strElementName);
}
public static class XmlHelper
{
public static String ToValidXmlName(String p_name)
{
/*
* http://www.w3.org/TR/REC-xml/#NT-Name
NameStartChar ::= ":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]
NameChar ::= NameStartChar | "-" | "." | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040]
*/
string patNameStartChar = @":|[A-Z]|_|[a-z]|[\xC0-\xD6]|[\xD8-\xF6]|[\xF8-\u02FF]|[\u0370-\u037D]|[\u037F-\u1FFF]|[\u200C-\u200D]|[\u2070-\u218F]|[\u2C00-\u2FEF]|[\u3001-\uD7FF]|[\uF900-\uFDCF]|[\uFDF0-\uFFFD]";
string patNameChar = patNameStartChar +"|" + @"-|\.|[0-9]|\xB7|[\u0300-\u036F]|[\u203F-\u2040]";
String pat=@"^(" + patNameStartChar + ")" + "(" + patNameChar + ")*$";
if (Regex.Match(p_name, pat, RegexOptions.Singleline).Success)
return p_name;
else
{
StringBuilder bld=new StringBuilder();
for (int i=;i<p_name.Length;i++)
{
bool bMatch=false;
if (i==)
bMatch = Regex.Match(p_name[i].ToString(), patNameStartChar, RegexOptions.Singleline).Success;
else
bMatch = Regex.Match(p_name[i].ToString(), patNameChar, RegexOptions.Singleline).Success;
if(bMatch)
bld.Append(p_name[i]);
else
bld.AppendFormat("_x{0:x}_", (int)p_name[i]);
}
return bld.ToString();
}
}
public static void WriteStartElement_auto(this XmlWriter wri, String p_strName)
{
if (p_strName.Contains(":"))
{
String prefix=p_strName.Substring(, p_strName.LastIndexOf(':'));
string localName=p_strName.Substring(p_strName.LastIndexOf(':')+);
if(String.IsNullOrEmpty(localName))
{
localName = p_strName.Substring(, p_strName.Length-);
prefix = "";
}
wri.WriteStartElement(localName, prefix);
} else
wri.WriteStartElement(p_strName);
}
}
public class JS_String : JS_Value
{
public String RawValue{get;set;}
public String Value{get;set;}
public override string ToString()
{
return RawValue;
}
public override void ToXml(XmlWriter p_wri, bool p_bCreateElement, String p_strElementName)
{
String strEleName=XmlHelper.ToValidXmlName(String.IsNullOrEmpty(p_strElementName)? "Value" : p_strElementName);
if (p_bCreateElement)
{
p_wri.WriteStartElement_auto(strEleName);
}
p_wri.WriteAttributeString("type", "string");
p_wri.WriteString(Value);
if (p_bCreateElement)
{
p_wri.WriteEndElement();
}
}//ToXml()
}//class
public class JS_Number: JS_Value
{
public String Number{get;set;}
public override string ToString()
{
return Number;
} public override void ToXml(XmlWriter p_wri, bool p_bCreateElement, String p_strElementName)
{
String strEleName=XmlHelper.ToValidXmlName(String.IsNullOrEmpty(p_strElementName)? "Value" : p_strElementName);
if (p_bCreateElement)
{
p_wri.WriteStartElement_auto(strEleName);
}
p_wri.WriteAttributeString("type", "number");
p_wri.WriteString(Number);
if (p_bCreateElement)
{
p_wri.WriteEndElement();
}
}
}
public class JS_Object: JS_Value
{
private Dictionary<String, JS_Value> m_properties=new Dictionary<String, JS_Value> ();
public Dictionary<String, JS_Value> Properties{
get{
return m_properties;
}
}
public override string ToString()
{
if(m_properties.Count<=)
return "{}";
else
return "{" + m_properties.Select(x=>"\"" + x.Key + "\":" + x.Value.ToString())
.Aggregate((x,y)=> x + ",\r\n" +y ) +"}";
} public override void ToXml(XmlWriter p_wri, bool p_bCreateElement, String p_strElementName)
{
String strEleName=XmlHelper.ToValidXmlName(String.IsNullOrEmpty(p_strElementName)? "Value" : p_strElementName);
if (p_bCreateElement)
{
p_wri.WriteStartElement_auto(strEleName);
}
p_wri.WriteAttributeString("type", "object");
foreach (String properName in m_properties.Keys) {
m_properties[properName].ToXml(p_wri, true, properName);
}
if (p_bCreateElement)
{
p_wri.WriteEndElement();
}
}
}//class JS_Obj
public class JS_Array : JS_Value
{
private List<JS_Value> m_elements=new List<JS_Value>();
public List<JS_Value> Elements{
get{
return m_elements;
}
}
public override string ToString()
{
if(m_elements.Count<=)
return "[]";
else
return "[" + m_elements.Select(x=>x.ToString()).Aggregate((x,y)=> x + ",\r\n" +y ) +"]";
} public override void ToXml(XmlWriter p_wri, bool p_bCreateElement, String p_strElementName)
{
String strEleName="Value";
if (p_bCreateElement)
{
p_wri.WriteStartElement_auto(strEleName);
}
p_wri.WriteAttributeString("type", "array");
foreach (JS_Value element in m_elements) {
element.ToXml(p_wri, true, p_strElementName);
}
if (p_bCreateElement)
{
p_wri.WriteEndElement();
}
}
}
public enum enumJSConst{
eTrue, eFalse,eNull
}
public class JS_Const : JS_Value
{
public JS_Const(enumJSConst val){ m_value = val;}
private enumJSConst m_value;
public enumJSConst Value{get{return m_value;}} public override string ToString()
{
return m_value.ToString().Substring().ToLower();
}
public override void ToXml(XmlWriter p_wri, bool p_bCreateElement, String p_strElementName)
{
String strEleName=XmlHelper.ToValidXmlName(String.IsNullOrEmpty(p_strElementName)? "Value" : p_strElementName);
if (p_bCreateElement)
{
p_wri.WriteStartElement_auto(strEleName);
}
p_wri.WriteAttributeString("type", "const");
p_wri.WriteString(ToString());
if (p_bCreateElement)
{
p_wri.WriteEndElement();
}
} public static JS_Const True = new JS_Const(enumJSConst.eTrue);
public static JS_Const False = new JS_Const(enumJSConst.eFalse);
public static JS_Const Null = new JS_Const(enumJSConst.eNull); }
public class JsonDecoder
{
public static JS_Value Decode(String p_stream)
{
if (String.IsNullOrWhiteSpace(p_stream))
return null;
else
{
String s=p_stream.Trim();
int nPos=;
JS_Value v= GetValue(s, ref nPos);
if (nPos == s.Length)
return v;
else
throw Error.InvalidJsonStream;
}
}
private static char NextChar(String p_stream, ref int p_currentPos)
{
if (p_currentPos>=p_stream.Length)
throw Error.InvalidJsonStream;
return p_stream[p_currentPos++];
}
private static void SkipSpaces(String p_stream, ref int p_currentPos)
{
while (p_currentPos<p_stream.Length
&& (Char.IsWhiteSpace(p_stream[p_currentPos])
/* || Char.IsControl(p_stream[p_currentPos])*/
)
)
{
p_currentPos++;
}//while }
private static char PeekChar(String p_stream, int p_currentPos)
{
if (p_currentPos>=p_stream.Length)
throw Error.InvalidJsonStream;
return p_stream[p_currentPos];
}
public static JS_Value GetValue(String p_stream, ref int p_currentPos)
{
JS_Value newValue=GetConst(p_stream, ref p_currentPos);
if (null == newValue)
newValue = GetString(p_stream, ref p_currentPos);
if (null == newValue)
newValue = GetNumber(p_stream, ref p_currentPos);
if (null == newValue)
newValue = GetObject(p_stream, ref p_currentPos);
if (null == newValue)
newValue = GetArray(p_stream, ref p_currentPos); if(null == newValue)
throw Error.InvalidJsonStream;
return newValue;
}
public static JS_Number GetNumber(String p_stream, ref int p_currentPos)
{
int nLen = p_stream.Length;
if (p_currentPos>=nLen)
return null;
String strFraction=@"\.[0-9]+";
String strExposion=@"[eE][+-]?[0-9]+";
String strPattern=@"^(\-)?[1-9][0-9]*(" + strFraction +")?(" + strExposion + ")?";
// if(p_stream.Substring(p_currentPos).StartsWith("500"))
// Console.WriteLine("Here");
Regex rex=new Regex(strPattern);
Match m= rex.Match(p_stream.Substring(p_currentPos));
if (!m.Success) {
/*m = Regex.Match(p_stream.Substring(p_currentPos), strPattern);
m = Regex.Match(p_stream.Substring(p_currentPos), @"^-?[1-9][0-9]*");
m = Regex.Match(p_stream.Substring(p_currentPos), @"^\-?[1-9][0-9]*");
m = Regex.Match(p_stream.Substring(p_currentPos), @"^(-)?[1-9][0-9]*");
m = Regex.Match(p_stream.Substring(p_currentPos), @"^(\-)?[1-9][0-9]*");
*/
return null;
}
JS_Number result=new JS_Number();
result.Number = p_stream.Substring(p_currentPos, m.Groups[].Length);
p_currentPos += m.Groups[].Length;
return result;
}
public static JS_Const GetConst(String p_stream, ref int p_currentPos)
{
int nLen = p_stream.Length;
if (p_currentPos>=nLen)
return null;
string temp=p_stream.Substring(p_currentPos);
if (temp.StartsWith("true", StringComparison.CurrentCultureIgnoreCase))
{
p_currentPos+=;
return JS_Const.True;
}
if (temp.StartsWith("false", StringComparison.CurrentCultureIgnoreCase))
{
p_currentPos+=;
return JS_Const.False;
}
if (temp.StartsWith("null", StringComparison.CurrentCultureIgnoreCase))
{
p_currentPos+=;
return JS_Const.Null;
}
return null;
}
public static JS_Array GetArray(String p_stream, ref int p_currentPos)
{
int nLen = p_stream.Length;
if (p_currentPos>=nLen)
return null;
int nCurrent=p_currentPos;
if (PeekChar(p_stream, nCurrent) != '[')
return null;
nCurrent++;
JS_Array result=new JS_Array();
SkipSpaces(p_stream, ref nCurrent);
while(nCurrent<=nLen)
{
int c=PeekChar(p_stream,nCurrent);
if (c==']')
{
nCurrent++;
break;
}
bool noMorePairs=false;
while(!noMorePairs)
{
JS_Value propertyValue=GetValue(p_stream, ref nCurrent);
result.Elements.Add(propertyValue);
SkipSpaces(p_stream, ref nCurrent);
if (PeekChar(p_stream, nCurrent) != ',')
noMorePairs=true;
else
{
nCurrent++;
SkipSpaces(p_stream, ref nCurrent);
}
}//inner while
}//outter while
p_currentPos=nCurrent;
return result;
}
public static JS_Object GetObject(String p_stream, ref int p_currentPos)
{
int nLen = p_stream.Length;
if (p_currentPos>=nLen)
return null;
int nCurrent=p_currentPos;
if (PeekChar(p_stream, nCurrent) != '{')
return null;
nCurrent++;
JS_Object result=new JS_Object();
SkipSpaces(p_stream, ref nCurrent);
while(nCurrent<=nLen)
{
int c=PeekChar(p_stream,nCurrent);
if (c=='}')
{
nCurrent++;
break;
}
bool noMorePairs=false;
while(!noMorePairs)
{
JS_String propertyName=GetString(p_stream, ref nCurrent);
SkipSpaces(p_stream, ref nCurrent);
Char c1 =NextChar(p_stream,ref nCurrent);
if (c1!=':')
throw Error.InvalidJsonStream;
SkipSpaces(p_stream, ref nCurrent);
JS_Value propertyValue=GetValue(p_stream, ref nCurrent);
result.Properties.Add(propertyName.Value, propertyValue);
SkipSpaces(p_stream, ref nCurrent);
if (PeekChar(p_stream, nCurrent) != ',')
noMorePairs=true;
else
{
nCurrent++;
SkipSpaces(p_stream, ref nCurrent);
}
}//inner while
}//outter while
p_currentPos=nCurrent;
return result;
}
public static JS_String GetString(String p_stream, ref int p_currentPos)
{
int nLen = p_stream.Length;
if (p_currentPos>=nLen)
return null;
JS_String result=new JS_String();
int nCurrent=p_currentPos;
if (PeekChar(p_stream, nCurrent) != '"')
return null;
nCurrent++;
StringBuilder bld=new StringBuilder();
while(nCurrent<=nLen)
{
Char c=p_stream[nCurrent++];
if (c=='"')
break;
if (c != '\\')
{
bld.Append(c);
continue;
}
c = NextChar(p_stream, ref nCurrent);
if (c=='"')
bld.Append('"');
else if (c == '\\')
bld.Append('\\');
else if (c == '/')
bld.Append('/');
else if (c == 'b')
bld.Append('\b');
else if (c == 't')
bld.Append('\t');
else if (c == 'r')
bld.Append('\r');
else if (c == 'n')
bld.Append('\n');
else if (c == 'f')
bld.Append('\f');
else if (c == 'u')
{
char[] code=new Char[];
code[]=NextChar(p_stream, ref nCurrent);
code[]=NextChar(p_stream, ref nCurrent);
code[]=NextChar(p_stream, ref nCurrent);
code[]=NextChar(p_stream, ref nCurrent);
int nCodePoint=Int32.Parse(code.ToString(), NumberStyles.HexNumber);
bld.Append((char)nCodePoint);
}
}//while()
result.Value = bld.ToString();
result.RawValue = p_stream.Substring(p_currentPos, nCurrent-p_currentPos);
p_currentPos=nCurrent;
return result;
} } //class JsonDecoder
public static class Error{
public static Exception InvalidJsonStream
{
get
{
return new Exception("Invalid Json Stream");
}
}
}//class Error
}
这个只是给你一个方向，如果要用的话，需要修改符合自己的业务规则或者适合自己的使用。
出处：https://www.cnblogs.com/sliencer/archive/2013/06/25/3155768.html
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