SQL SERVER 使用 高德地图逆地址解析
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作者：卞功鑫 ，转载请保留http://www.cnblogs.com/BinBinGo/p/6973234.html。
一般我们得到的经纬度信息为GPS信息,所以要使用高德地图的逆地址解析功能(即把经纬度信息转换为地址信息),先需要把GPS经纬度信息先转换为高德地图经纬度.
一 经纬度转换
高德提供了转换API接口
http://restapi.amap.com/v3/assistant/coordinate/convert?key=您的key&locations=116.481499,39.990475&coordsys=gps
使用些接口可以把GPS信息转换为高德经纬度信息.
二 使用高德逆地址解析功能
高德提供了API接口
http://restapi.amap.com/v3/geocode/regeo?key=您的key&location=116.481488,39.990464&poitype=商务写字楼&radius=1000&extensions=all&batch=false&roadlevel=0
可以把经纬度信息转换为地址信息
各参数使用方法见高德官方网站:http://lbs.amap.com/api/webservice/summary
以上内容为官方内容,接下来要实现的是. 这些功能怎么在SQL Server 中 实现 :
上篇文章介绍了
存储过程封装web service
但是想要完整的实现还需要很多工作要做:
1 创建解析json函数
CREATE FUNCTION dbo.parseJSON( @JSON NVARCHAR(MAX)) RETURNS @hierarchy TABLE ( element_id INT IDENTITY(1, 1) NOT NULL, /* internal surrogate primary key gives the order of parsing and the list order */ sequenceNo [int] NULL, /* the place in the sequence for the element */ parent_ID INT,/* if the element has a parent then it is in this column. The document is the ultimate parent, so you can get the structure from recursing from the document */ Object_ID INT,/* each list or object has an object id. This ties all elements to a parent. Lists are treated as objects here */ NAME NVARCHAR(2000),/* the name of the object */ StringValue NVARCHAR(MAX) NOT NULL,/*the string representation of the value of the element. */ ValueType VARCHAR(10) NOT null /* the declared type of the value represented as a string in StringValue*/ ) AS BEGIN DECLARE @FirstObject INT, --the index of the first open bracket found in the JSON string @OpenDelimiter INT,--the index of the next open bracket found in the JSON string @NextOpenDelimiter INT,--the index of subsequent open bracket found in the JSON string @NextCloseDelimiter INT,--the index of subsequent close bracket found in the JSON string @Type NVARCHAR(10),--whether it denotes an object or an array @NextCloseDelimiterChar CHAR(1),--either a ‘}‘ or a ‘]‘ @Contents NVARCHAR(MAX), --the unparsed contents of the bracketed expression @Start INT, --index of the start of the token that you are parsing @end INT,--index of the end of the token that you are parsing @param INT,--the parameter at the end of the next Object/Array token @EndOfName INT,--the index of the start of the parameter at end of Object/Array token @token NVARCHAR(200),--either a string or object @value NVARCHAR(MAX), -- the value as a string @SequenceNo int, -- the sequence number within a list @name NVARCHAR(200), --the name as a string @parent_ID INT,--the next parent ID to allocate @lenJSON INT,--the current length of the JSON String @characters NCHAR(36),--used to convert hex to decimal @result BIGINT,--the value of the hex symbol being parsed @index SMALLINT,--used for parsing the hex value @Escape INT --the index of the next escape character DECLARE @Strings TABLE /* in this temporary table we keep all strings, even the names of the elements, since they are ‘escaped‘ in a different way, and may contain, unescaped, brackets denoting objects or lists. These are replaced in the JSON string by tokens representing the string */ ( String_ID INT IDENTITY(1, 1), StringValue NVARCHAR(MAX) ) SELECT--initialise the characters to convert hex to ascii @characters=‘0123456789abcdefghijklmnopqrstuvwxyz‘, @SequenceNo=0, --set the sequence no. to something sensible. /* firstly we process all strings. This is done because [{} and ] aren‘t escaped in strings, which complicates an iterative parse. */ @parent_ID=0; WHILE 1=1 --forever until there is nothing more to do BEGIN SELECT @start=PATINDEX(‘%[^a-zA-Z]["]%‘, @json collate SQL_Latin1_General_CP850_Bin);--next delimited string IF @start=0 BREAK --no more so drop through the WHILE loop IF SUBSTRING(@json, @start+1, 1)=‘"‘ BEGIN --Delimited Name SET @start=@Start+1; SET @end=PATINDEX(‘%[^\\]["]%‘, RIGHT(@json, LEN(@json+‘|‘)-@start) collate SQL_Latin1_General_CP850_Bin); END IF @end=0 --no end delimiter to last string BREAK --no more SELECT @token=SUBSTRING(@json, @start+1, @end-1) --now put in the escaped control characters SELECT @token=REPLACE(@token, FROMString, TOString) FROM (SELECT ‘\\"‘ AS FromString, ‘"‘ AS ToString UNION ALL SELECT ‘\\\\‘, ‘\\‘ UNION ALL SELECT ‘\\/‘, ‘/‘ UNION ALL SELECT ‘\\b‘, CHAR(08) UNION ALL SELECT ‘\\f‘, CHAR(12) UNION ALL SELECT ‘\\n‘, CHAR(10) UNION ALL SELECT ‘\\r‘, CHAR(13) UNION ALL SELECT ‘\\t‘, CHAR(09) ) substitutions SELECT @result=0, @escape=1 --Begin to take out any hex escape codes WHILE @escape>0 BEGIN SELECT @index=0, --find the next hex escape sequence @escape=PATINDEX(‘%\\x[0-9a-f][0-9a-f][0-9a-f][0-9a-f]%‘, @token collate SQL_Latin1_General_CP850_Bin) IF @escape>0 --if there is one BEGIN WHILE @index<4 --there are always four digits to a \\x sequence BEGIN SELECT --determine its value @result=@result+POWER(16, @index) *(CHARINDEX(SUBSTRING(@token, @escape+2+3-@index, 1), @characters)-1), @index=@index+1 ; END -- and replace the hex sequence by its unicode value SELECT @token=STUFF(@token, @escape, 6, NCHAR(@result)) END END --now store the string away INSERT INTO @Strings (StringValue) SELECT @token -- and replace the string with a token SELECT @JSON=STUFF(@json, @start, @end+1, ‘@string‘+CONVERT(NVARCHAR(5), @@identity)) END -- all strings are now removed. Now we find the first leaf. WHILE 1=1 --forever until there is nothing more to do BEGIN SELECT @parent_ID=@parent_ID+1 --find the first object or list by looking for the open bracket SELECT @FirstObject=PATINDEX(‘%[{[[]%‘, @json collate SQL_Latin1_General_CP850_Bin)--object or array IF @FirstObject = 0 BREAK IF (SUBSTRING(@json, @FirstObject, 1)=‘{‘) SELECT @NextCloseDelimiterChar=‘}‘, @type=‘object‘ ELSE SELECT @NextCloseDelimiterChar=‘]‘, @type=‘array‘ SELECT @OpenDelimiter=@firstObject WHILE 1=1 --find the innermost object or list... BEGIN SELECT @lenJSON=LEN(@JSON+‘|‘)-1 --find the matching close-delimiter proceeding after the open-delimiter SELECT @NextCloseDelimiter=CHARINDEX(@NextCloseDelimiterChar, @json, @OpenDelimiter+1) --is there an intervening open-delimiter of either type SELECT @NextOpenDelimiter=PATINDEX(‘%[{[[]%‘, RIGHT(@json, @lenJSON-@OpenDelimiter)collate SQL_Latin1_General_CP850_Bin)--object IF @NextOpenDelimiter=0 BREAK SELECT @NextOpenDelimiter=@NextOpenDelimiter+@OpenDelimiter IF @NextCloseDelimiter<@NextOpenDelimiter BREAK IF SUBSTRING(@json, @NextOpenDelimiter, 1)=‘{‘ SELECT @NextCloseDelimiterChar=‘}‘, @type=‘object‘ ELSE SELECT @NextCloseDelimiterChar=‘]‘, @type=‘array‘ SELECT @OpenDelimiter=@NextOpenDelimiter END ---and parse out the list or name/value pairs SELECT @contents=SUBSTRING(@json, @OpenDelimiter+1, @NextCloseDelimiter-@OpenDelimiter-1) SELECT @JSON=STUFF(@json, @OpenDelimiter, @NextCloseDelimiter-@OpenDelimiter+1, ‘@‘+@type+CONVERT(NVARCHAR(5), @parent_ID)) WHILE (PATINDEX(‘%[[email protected]+.e]%‘, @contents collate SQL_Latin1_General_CP850_Bin))<>0 BEGIN IF @Type=‘Object‘ --it will be a 0-n list containing a string followed by a string, number,boolean, or null BEGIN SELECT @SequenceNo=0,@end=CHARINDEX(‘:‘, ‘ ‘+@contents)--if there is anything, it will be a string-based name. SELECT @start=PATINDEX(‘%[^[email protected]][@]%‘, ‘ ‘+@contents collate SQL_Latin1_General_CP850_Bin)--AAAAAAAA SELECT @token=SUBSTRING(‘ ‘+@contents, @start+1, @End-@Start-1), @endofname=PATINDEX(‘%[0-9]%‘, @token collate SQL_Latin1_General_CP850_Bin), @param=RIGHT(@token, LEN(@token)-@endofname+1) SELECT @token=LEFT(@token, @endofname-1), @Contents=RIGHT(‘ ‘+@contents, LEN(‘ ‘+@contents+‘|‘)-@end-1) SELECT @name=stringvalue FROM @strings WHERE string_id=@param --fetch the name END ELSE SELECT @Name=null,@SequenceNo=@SequenceNo+1 SELECT @end=CHARINDEX(‘,‘, @contents)-- a string-token, object-token, list-token, number,boolean, or null IF @end=0 SELECT @end=PATINDEX(‘%[[email protected]+.e][^[email protected]+.e]%‘, @Contents+‘ ‘ collate SQL_Latin1_General_CP850_Bin) +1 SELECT @start=PATINDEX(‘%[^[email protected]+.e][[email protected]+.e]%‘, ‘ ‘+@contents collate SQL_Latin1_General_CP850_Bin) --select @start,@end, LEN(@contents+‘|‘), @contents SELECT @Value=RTRIM(SUBSTRING(@contents, @start, @End-@Start)), @Contents=RIGHT(@contents+‘ ‘, LEN(@contents+‘|‘)-@end) IF SUBSTRING(@value, 1, 7)=‘@object‘ INSERT INTO @hierarchy (NAME, SequenceNo, parent_ID, StringValue, Object_ID, ValueType) SELECT @name, @SequenceNo, @parent_ID, SUBSTRING(@value, 8, 5), SUBSTRING(@value, 8, 5), ‘object‘ ELSE IF SUBSTRING(@value, 1, 6)=‘@array‘ INSERT INTO @hierarchy (NAME, SequenceNo, parent_ID, StringValue, Object_ID, ValueType) SELECT @name, @SequenceNo, @parent_ID, SUBSTRING(@value, 7, 5), SUBSTRING(@value, 7, 5), ‘array‘ ELSE IF SUBSTRING(@value, 1, 7)=‘@string‘ INSERT INTO @hierarchy (NAME, SequenceNo, parent_ID, StringValue, ValueType) SELECT @name, @SequenceNo, @parent_ID, stringvalue, ‘string‘ FROM @strings WHERE string_id=SUBSTRING(@value, 8, 5) ELSE IF @value IN (‘true‘, ‘false‘) INSERT INTO @hierarchy (NAME, SequenceNo, parent_ID, StringValue, ValueType) SELECT @name, @SequenceNo, @parent_ID, @value, ‘boolean‘ ELSE IF @value=‘null‘ INSERT INTO @hierarchy (NAME, SequenceNo, parent_ID, StringValue, ValueType) SELECT @name, @SequenceNo, @parent_ID, @value, ‘null‘ ELSE IF PATINDEX(‘%[^0-9]%‘, @value collate SQL_Latin1_General_CP850_Bin)>0 INSERT INTO @hierarchy (NAME, SequenceNo, parent_ID, StringValue, ValueType) SELECT @name, @SequenceNo, @parent_ID, @value, ‘real‘ ELSE INSERT INTO @hierarchy (NAME, SequenceNo, parent_ID, StringValue, ValueType) SELECT @name, @SequenceNo, @parent_ID, @value, ‘int‘ if @Contents=‘ ‘ Select @SequenceNo=0 END END INSERT INTO @hierarchy (NAME, SequenceNo, parent_ID, StringValue, Object_ID, ValueType) SELECT ‘-‘,1, NULL, ‘‘, @parent_id-1, @type -- RETURN END
2 创建经纬度转换存储过程
CREATE PROC p_et_gps_convert ( @log VARCHAR(80) , @lat VARCHAR(80) , @result VARCHAR(8000) OUTPUT ) AS DECLARE @ServiceUrl AS VARCHAR(1000); DECLARE @UrlAddress VARCHAR(500); ---WebService地址：以http开头，结尾带斜杠，例如‘http://webservice.webxml.com.cn/WebServices/MobileCodeWS.asmx/‘ SET @UrlAddress = ‘http://restapi.amap.com/v3/assistant/coordinate/‘; DECLARE @FunName VARCHAR(50); ---WebService中调用的方法名：例如‘getMobileCodeInfo‘ SET @FunName = ‘convert‘; ---以下参数对应WebService中4个参数的[参数名] DECLARE @location VARCHAR(200) , @key VARCHAR(200) , @coordsys VARCHAR(20); SET @location = @log + ‘,‘ + @lat; SET @key = ‘bgxbgxbgxbgxbgxbgx‘; SET @coordsys = ‘gps‘; SET @ServiceUrl = @UrlAddress + @FunName + ‘?key=‘ + @key + ‘&locations=‘ + @location + ‘&coordsys=‘ + @coordsys; DECLARE @Object AS INT; DECLARE @ResponseText AS VARCHAR(8000); EXEC sp_OACreate ‘MSXML2.XMLHTTP‘, @Object OUT; EXEC sp_OAMethod @Object, ‘open‘, NULL, ‘get‘, @ServiceUrl, ‘false‘; EXEC sp_OAMethod @Object, ‘send‘; EXEC sp_OAMethod @Object, ‘responseText‘, @ResponseText OUTPUT; SELECT @result = StringValue FROM dbo.parseJSON(@ResponseText) WHERE NAME = ‘locations‘; EXEC sp_OADestroy @Object;
3 创建逆地址解析存储过程
CREATE PROC p_et_gps_geocode(@log VARCHAR(20),@lat VARCHAR(20),@result VARCHAR(8000) OUTPUT) as DECLARE @ServiceUrl AS VARCHAR(1000); DECLARE @UrlAddress VARCHAR(500); ---WebService地址：以http开头，结尾带斜杠，例如‘http://webservice.webxml.com.cn/WebServices/MobileCodeWS.asmx/‘ SET @UrlAddress = ‘http://restapi.amap.com/v3/geocode/‘; DECLARE @FunName VARCHAR(50); ---WebService中调用的方法名：例如‘getMobileCodeInfo‘ SET @FunName = ‘regeo‘; ---以下参数对应WebService中4个参数的[参数名] DECLARE @output VARCHAR(20) , @location VARCHAR(200) , @key VARCHAR(200) , @radius VARCHAR(10) , @extensions VARCHAR(10); exec p_et_gps_convert @log,@lat,@location output SET @output = ‘json‘; SET @key = ‘bgxbgxbgxbgxbgxbgx‘; SET @radius = ‘1000‘; SET @extensions = ‘base‘; SET @ServiceUrl= @UrlAddress + @FunName + ‘?output=‘ + @output + ‘&location=‘ + @location + ‘&key=‘ + @key + ‘&radius=‘ + @radius + ‘&extensions=‘ + @extensions; DECLARE @Object AS INT; DECLARE @ResponseText AS VARCHAR(8000); EXEC sp_OACreate ‘MSXML2.XMLHTTP‘, @Object OUT; EXEC sp_OAMethod @Object, ‘open‘, NULL, ‘get‘,@ServiceUrl, ‘false‘; EXEC sp_OAMethod @Object, ‘send‘; EXEC sp_OAMethod @Object, ‘responseText‘, @ResponseText OUTPUT; SET @result = @ResponseText; EXEC sp_OADestroy @Object;
4 使用 之前创建的 解析函数查询就可以了.
DECLARE @info VARCHAR(max) EXEC p_et_gps_geocode ‘112.226135‘,‘35.57848‘,@info OUTPUT SELECT * FROM dbo.parseJSON( @info)
以上SQL SERVER 中 解决这些问题完全搞定.