IOS parsing JSON DOM SAX for a file

Mainly on the file of three kinds of parsing methods, the relevant files have been compressed in the attachment

. h file

#import <UIKit/UIKit.h>

#import "StudentModel.h"

#import "GDataXMLNode.h"

@interface rootviewcontroller:uiviewcontroller<nsxmlparserdelegate>

@property (Nonatomic,retain) Nsmutablearray *dataarray;

Storing temporary variables

@property (nonatomic, retain) NSString *tempstr;

@end

. m file

#import "RootViewController.h"

@interface Rootviewcontroller ()

@end

@implementation Rootviewcontroller

-(void) Viewdidload {

[Super Viewdidload];

UIButton *button1 =[uibutton Buttonwithtype:uibuttontypecustom];

[Button1 settitle:@ "JSON" forstate:uicontrolstatenormal];

UIButton *button2 =[uibutton Buttonwithtype:uibuttontypecustom];

[Button2 settitle:@ "DOM" forstate:uicontrolstatenormal];



UIButton *button3 =[uibutton Buttonwithtype:uibuttontypecustom];

[Button3 settitle:@ "SAX" forstate:uicontrolstatenormal];

Button1.frame =cgrectmake (10, 80, 50, 20);

Button2.frame =cgrectmake (30,110, 50, 20);

Button3.frame =cgrectmake (80, 150, 50, 20);

Button1.layer.borderWidth = 1;

Button1.layer.borderColor =[uicolor Blackcolor]. Cgcolor;

Button2.layer.borderWidth = 1;

Button2.layer.borderColor =[uicolor Blackcolor]. Cgcolor;

Button3.layer.borderWidth = 1;

Button3.layer.borderColor =[uicolor Blackcolor]. Cgcolor;

[Self.view Addsubview:button1];

[Self.view Addsubview:button2];

[Self.view Addsubview:button3];

Self.view.backgroundColor =[uicolor Redcolor];

[Button1 addtarget:self Action: @selector (Change1) forcontrolevents:uicontroleventtouchupinside];

[Button2 addtarget:self Action: @selector (Change2) forcontrolevents:uicontroleventtouchupinside];

[Button3 addtarget:self Action: @selector (Change3) forcontrolevents:uicontroleventtouchupinside];

}

Parsing JSON

-(void) Change1

{

NSString *path=[[nsbundle mainbundle]pathforresource:@ "Student" oftype:@ "txt"];

Convert files to Nsjson based on path

NSData *data =[nsdata Datawithcontentsoffile:path];

Self.dataarray =[nsmutablearray Array];

Create error message

Nserror *error =nil;

Get the array (inside the dictionary)

Nsarray *array = [nsjsonserialization jsonobjectwithdata:data options:nsjsonreadingmutablecontainers error:& ERROR];

Iterating through an array

For (nsdictionary *dic in array) {

Studentmodel *stu =[studentmodel Getstudentmodel];

[Stu Setvaluesforkeyswithdictionary:dic];

[Self.dataarray Addobject:stu];

}

Results Print View

Studentmodel *stu1 =[self.dataarray objectatindex:1];

NSLog (@ "%@", stu1.name);

}

-(void) Change2

{

Dom parsing

NSString *path =[[nsbundle mainbundle]pathforresource:@ "Student" oftype:@ "xml"];

NSData *data =[nsdata Datawithcontentsoffile:path];

Self.dataarray =[nsmutablearray Array];

Reprint data (data is all added to memory, so DOM parsing consumes memory when parsing big data)

1. Parameter represents data 2 parameter is useless 3 parameter is error message

Nserror *error =nil;

Gdataxmldocument *document =[[gdataxmldocument alloc]initwithdata:data options:0 error:&error];

Get root node

Gdataxmlelement *rootelement =[document rootelement];

Get all child nodes

Nsarray *array =[rootelement elementsforname:@ "student"];

//

Traverse

For (gdataxmlelement *node in array) {

Studentmodel *stu =[studentmodel Getstudentmodel];

Stu.name = [[Node elementsforname:@ "name"]lastobject]stringvalue];

Stu.sex =[[[node elementsforname:@ "Sex"]lastobject]stringvalue];

Stu.number =[[[[node elementsforname:@ "number"]lastobject]stringvalue]integervalue];

Stu.phone =[[[[node elementsforname:@ "Phone"]lastobject]stringvalue]integervalue];

[Self.dataarray Addobject:stu];

//

//    }

Studentmodel *model =[self.dataarray objectatindex:1];

NSLog (@ "%@", model.name);

NSString *path =[[nsbundle mainbundle]pathforresource:@ "Student" oftype:@ "xml"];

NSData *data =[nsdata Datawithcontentsoffile:path];

Self.dataarray =[nsmutablearray Array];



Nserror *error =nil;

Gdataxmldocument *document =[[gdataxmldocument alloc]initwithdata:data options:0 error:&error];

Gdataxmlelement *rootelement =[document rootelement];

Nsarray *array =[rootelement elementsforname:@ "student"];

For (gdataxmlelement *node in array) {

Studentmodel *stu =[studentmodel Getstudentmodel];

Stu.name =[[[node elementsforname:@ "name"]lastobject]stringvalue];

Stu.sex =[[[node elementsforname:@ "Sex"]lastobject]stringvalue];

Stu.number =[[[[node elementsforname:@ "number"]lastobject]stringvalue] integervalue];

Stu.phone = [[[[Node

elementsforname:@ "Phone"]lastobject]stringvalue]integervalue];

[Self.dataarray Addobject:stu];

}

Studentmodel *model =[self.dataarray objectatindex:1];

NSLog (@ "%@", model.name);

}

-(void) Change3

{

Parsing an XML file in sax mode

Get the file path to resolve

NSString *path =[[nsbundle mainbundle]pathforresource:@ "Student" oftype:@ "xml"];

Turn this file into a nsdata.

NSData *data =[nsdata Datawithcontentsoffile:path];

Creating a parsing class

Nsxmlparser *parser =[[nsxmlparser Alloc]initwithdata:data];

Set up Proxy

Parser.delegate =self;

Start parsing

[Parser parse];



}

-(void) Parser: (Nsxmlparser *) parser foundcharacters: (NSString *) string{

Discover node Content

Record node content

Self.tempstr =string;

}

#pragma-mark Sax Parsing proxy method



-(void) Parser: (Nsxmlparser *) parser didstartelement: (NSString *) elementname NamespaceURI: (NSString *) NamespaceURI QualifiedName: (NSString *) QName attributes: (nsdictionary *) attributedict

{

Head node

if ([elementname isequaltostring:@ "Students"]) {

Self.dataarray =[nsmutablearray Array];

} else if ([elementname isequaltostring:@ "Student"]) {

Studentmodel *stu =[studentmodel Getstudentmodel];

[Self.dataarray Addobject:stu];

}

}

-(void) Parser: (Nsxmlparser *) parser didendelement: (NSString *) elementname NamespaceURI: (NSString *) NamespaceURI QualifiedName: (NSString *) qname{



Discovery Tail Node

Remove Stdentmodel

Studentmodel *stu =[self.dataarray Lastobject];

if ([ElementName isequaltostring:@ "number"]) {

Stu.number =[self.tempstr IntegerValue];

} else if ([elementname isequaltostring:@ "name"]) {

Stu.name =self.tempstr;

}else if ([elementname isequaltostring:@ "Sex"]) {

Stu.sex =self.tempstr;

}else if ([elementname isequaltostring:@ "Phone"]) {

Stu.phone =[self.tempstr IntegerValue];

}

}

Parse complete

-(void) Parserdidenddocument: (Nsxmlparser *) parser{

NSLog (@ "Parse complete");

Studentmodel *stu =[self.dataarray objectatindex:1];

NSLog (@ "%@", stu.name);

}

@end

This article is from the iOS blog, so be sure to keep this source http://10136044.blog.51cto.com/10126044/1679371

IOS parsing JSON DOM SAX for a file