내가 방금 쓴 더 간단한 것 :
public class JsonFormatter
{
public static string Indent = " ";
public static string PrettyPrint(string input)
{
var output = new StringBuilder(input.Length * 2);
char? quote = null;
int depth = 0;
for(int i=0; i<input.Length; ++i)
{
char ch = input[i];
switch (ch)
{
case '{':
case '[':
output.Append(ch);
if (!quote.HasValue)
{
output.AppendLine();
output.Append(Indent.Repeat(++depth));
}
break;
case '}':
case ']':
if (quote.HasValue)
output.Append(ch);
else
{
output.AppendLine();
output.Append(Indent.Repeat(--depth));
output.Append(ch);
}
break;
case '"':
case '\'':
output.Append(ch);
if (quote.HasValue)
{
if (!output.IsEscaped(i))
quote = null;
}
else quote = ch;
break;
case ',':
output.Append(ch);
if (!quote.HasValue)
{
output.AppendLine();
output.Append(Indent.Repeat(depth));
}
break;
case ':':
if (quote.HasValue) output.Append(ch);
else output.Append(" : ");
break;
default:
if (quote.HasValue || !char.IsWhiteSpace(ch))
output.Append(ch);
break;
}
}
return output.ToString();
}
}
필요한 확장 :
public static string Repeat(this string str, int count)
{
return new StringBuilder().Insert(0, str, count).ToString();
}
public static bool IsEscaped(this string str, int index)
{
bool escaped = false;
while (index > 0 && str[--index] == '\\') escaped = !escaped;
return escaped;
}
public static bool IsEscaped(this StringBuilder str, int index)
{
return str.ToString().IsEscaped(index);
}
샘플 출력 :
{
"status" : "OK",
"results" : [
{
"types" : [
"locality",
"political"
],
"formatted_address" : "New York, NY, USA",
"address_components" : [
{
"long_name" : "New York",
"short_name" : "New York",
"types" : [
"locality",
"political"
]
},
{
"long_name" : "New York",
"short_name" : "New York",
"types" : [
"administrative_area_level_2",
"political"
]
},
{
"long_name" : "New York",
"short_name" : "NY",
"types" : [
"administrative_area_level_1",
"political"
]
},
{
"long_name" : "United States",
"short_name" : "US",
"types" : [
"country",
"political"
]
}
],
"geometry" : {
"location" : {
"lat" : 40.7143528,
"lng" : -74.0059731
},
"location_type" : "APPROXIMATE",
"viewport" : {
"southwest" : {
"lat" : 40.5788964,
"lng" : -74.2620919
},
"northeast" : {
"lat" : 40.8495342,
"lng" : -73.7498543
}
},
"bounds" : {
"southwest" : {
"lat" : 40.4773990,
"lng" : -74.2590900
},
"northeast" : {
"lat" : 40.9175770,
"lng" : -73.7002720
}
}
}
}
]
}