Json解析

网络中数据的传输往往是以Json或XML格式进行的，如新浪微博、腾讯微博、人人网等。今天主要介绍一下ios下Json数据的解析。

首先是使用TouchJson进行解析：

TouchJson点击下载

首先导入

将Source文件加下的所以文件导入工程，在合适的位置添加CJSONDeserializer.h头文件。

代码：

01

NSString *jsonStr = <pclass="p1">@"{\"customer\":[{\"name\":\"roamer\",\"ycount\":\"232.4\",\"sumcount\":\"322.3\"},{\"name\":\"<span class="s1">王三</span>\",\"ycount\":\"221.2\",\"sumcount\":\"1123.2\"},{\"name\":\"<span class="s1">李四</span>\",\"ycount\":\"1221.2\",\"sumcount\":\"12123.2\"}]}"<span class="s2">;</span></p>;

02	NSData *jsonData = [jsonStr dataUsingEncoding:NSUTF8StringEncoding];

03	NSError *error;

04	NSMutableDictionary *root = [[CJSONDeserializer deserializer] deserialize:jsonData error:&error];

05	NSLog(@"Customers:%@", root);

06	NSMutableArray *customers = [root objectForKey:@"customer"];

07	NSString *jsonTextStr = @"姓名:\n";

08	for (NSMutableDictionary *customer in customers) {

09	NSString *name = [customer objectForKey:@"name"];

10	name = [name stringByAppendingString:@"\n"];

11	jsonTextStr = [jsonTextStr stringByAppendingString:name];

12	NSLog(@"customer:%@",[customer objectForKey:@"name"]);

13

}

输出结果：

01	Customers:{

02	customer =     (

03

{

04	name = roamer;

05	sumcount = "322.3";

06	ycount = "232.4";

07

},

08

{

09	name = "\U738b\U4e09";

10	sumcount = "1123.2";

11	ycount = "221.2";

12

},

13

{

14	name = "\U674e\U56db";

15	sumcount = "12123.2";

16	ycount = "1221.2";

17

}

18

);

19

}

20	2012-06-15 14:08:20.406 TouchJsonTest[1495:f803] customer:roamer

21	2012-06-15 14:08:20.406 TouchJsonTest[1495:f803] customer:王三

22	2012-06-15 14:08:20.406 TouchJsonTest[1495:f803] customer:李四

下面使用SBJson

SBJson下载
首先导入

将Classes文件加下的所以文件导入工程，在合适的位置添加SBJson.h头文件。

代码：

01

//解析数据

02	SBJsonParser *parser = [[SBJsonParser alloc] init];

03

NSString *jsonStr = <pclass="p1">@"{\"customer\":[{\"name\":\"roamer\",\"ycount\":\"232.4\",\"sumcount\":\"322.3\"},{\"name\":\"<span class="s1">王三</span>\",\"ycount\":\"221.2\",\"sumcount\":\"1123.2\"},{\"name\":\"<span class="s1">李四</span>\",\"ycount\":\"1221.2\",\"sumcount\":\"12123.2\"}]}"<span class="s2">;</span></p>

04	NSError *error = nil;

05	NSMutableDictionary *root = [[NSMutableDictionary alloc] initWithDictionary:[parser objectWithString:jsonStr error:&error]];

06	//转换代码 不然会带来中文问题，诸如加()、：变成 = 等乱码问题

07	SBJsonWriter *jsonWrite = [[SBJsonWriter alloc] init];

08	NSString *jsonString = [jsonWrite stringWithObject:root];

09	NSLog(@"JsonString:%@", jsonString);

10	[jsonWrite release];

11	NSMutableArray *customers = [root objectForKey:@"customer"];

12	NSLog(@"Customers:%@", customers);

13

14	for (NSMutableDictionary *customer in customers) {

15	NSLog(@"Customer-name:%@", [customer objectForKey:@"name"]);

16

}

17	[self.jsonData setText:@"解析完成"];

18	[self.parseBtn setTitle:@"Done" forState:UIControlStateNormal];

使用TouchJson和SBJson都可以快速的完成Json数据的解析，两者使用起来都比较简单，但TouchJson性能更好一些推荐使用。
转自：http://blog.youkuaiyun.com/shang_515/article/details/7666261