简介Objective-C解析XML与JSON数据格式的方法

<?xml version="1.0" encoding="utf-8"?>
<allusers>
 <message>用户信息</message>
 <user>
  <name>芳仔小脚印</name>
  <age>10</age>
  <school>jiangsu university</school>
 </user>
 <user>
  <name>毒虫</name>
  <age>22</age>
  <school>nanjing university</school>
 </user>
 <user>
  <name>女神</name>
  <age>23</age>
  <school>hongkong university</school>
 </user>
</allusers>

(
    {
    message = "用户信息";
  },
    {
    age = 10;
    name = "芳仔小脚印";
    school = "jiangsu university";
  },
    {
    age = 22;
    name = "毒虫";
    school = "nanjing university";
  },
    {
    age = 23;
    name = "女神";
    school = "hongkong university";
  }
)

// 遇到节点message和user时作为一个字典存放
    nsarray *keyelements = [[nsarray alloc] initwithobjects:@"message",@"user", nil];
    // 需要解析的字段
    nsarray *rootelements = [[nsarray alloc] initwithobjects:@"message",@"name",@"age",@"school", nil];
    // 获取xml文件的路径
    nsstring *xmlpath = [[nsbundle mainbundle] pathforresource:@"users" oftype:@"xml"];
    // 转化为data
    nsdata *data = [[nsdata alloc] initwithcontentsoffile:xmlpath];
    
    // 初始化
    nsxmlparser *xmlparser = [[nsxmlparser alloc] initwithdata:data];
    
    // 代理
    xmlparser.delegate = self;
    // 开始解析
    bool flag = [xmlparser parse];
    if (flag) {
        nslog(@"解析成功");
    }
    else{
        nslog(@"解析出错");
    }

nsstring *currentelement;
    
    nsstring *currentvalue;
    
    nsmutabledictionary *rootdic;
    
    nsmutablearray *finalarray;

#pragma - mark 开始解析时
-(void)parserdidstartdocument:(nsxmlparser *)parser
{
    // 用数组存储每一组信息
    finalarray = [[nsmutablearray alloc] init];
    
    
}
#pragma - mark 发现节点时
-(void)parser:(nsxmlparser *)parser didstartelement:(nsstring *)elementname namespaceuri:(nsstring *)namespaceuri qualifiedname:(nsstring *)qname attributes:(nsdictionary *)attributedict
{
    for(nsstring *key in self.keyelements){
        if ([elementname isequaltostring:key]) {
            // 关键节点开始时，初始化一个字典来存放值
            rootdic = nil;
            
            rootdic = [[nsmutabledictionary alloc] initwithcapacity:0];
            
        }
        else {
            for(nsstring *element in self.rootelements){
                if ([element isequaltostring:element]) {
                    currentelement = elementname;
                    currentvalue = [nsstring string];
                }
            }
        }
    }
    
}
#pragma - mark 发现节点值时
 
-(void)parser:(nsxmlparser *)parser foundcharacters:(nsstring *)string
{
    
    if (currentelement) {
 
        currentvalue = string;
        [rootdic setobject:string forkey:currentelement];
    }
    
}
#pragma - mark 结束节点时
-(void)parser:(nsxmlparser *)parser didendelement:(nsstring *)elementname namespaceuri:(nsstring *)namespaceuri qualifiedname:(nsstring *)qname
{
    if (currentelement) {
        [rootdic setobject:currentvalue forkey:currentelement];
        currentelement = nil;
        currentvalue = nil;
    }
    for(nsstring *key in self.keyelements){
 
        if ([elementname isequaltostring:key]) {
            // 关键节点结束时，将字典存放在数组中
            if (rootdic) {
 
                [finalarray addobject:rootdic];
            }
        }
    }
}
#pragma - mark 结束解析
-(void)parserdidenddocument:(nsxmlparser *)parser
{
    
}

(
 {
  message = "\u7528\u6237\u4fe1\u606f";
 },
 {
  age = 10;
  name = "\u82b3\u4ed4\u5c0f\u811a\u5370";
  school = "jiangsu university";
 },
 {
  age = 22;
  name = "\u6bd2\u866b";
  school = "nanjing university";
 },
 {
  age = 23;
  name = "\u5973\u795e";
  school = "hongkong university";
 }
)

nsdata * responsedata = [respones responsedata];
     
     nsstring * strresponser = [[nsstring alloc] initwithdata:responsedata encoding:nsutf8stringencoding];
sbjsonparser * parser = [[sbjsonparser alloc]init];
     nsmutabledictionary *dicmessageinfo = [parser objectwithstring:strresponser]; // 解析成json解析对象
[parser release];
     //发送者
     nsstring * sender = [dicmessageinfo objectforkey:@"sender"];

//要上传的字符串
    nsstring *datastr=[[nsstring alloc] initwithstring:@"{\"cross\":{\"1\":\"true\",\"2\":\"false\",\"3\":\"true\"}}"];
//获取响应返回字符串
nsdata * responsedata = [respones responsedata];
       
        nsstring * strresponser = [[nsstring alloc] initwithdata:responsedata encoding:nsutf8stringencoding];
//嵌套解析
sbjsonparser * parser = [[sbjsonparser alloc]init];
           
            nsmutabledictionary *dicmessageinfo = [parser objectwithstring:strresponser]; // 解析成json解析对象
           
            nsmutabledictionary * cross = [dicmessageinfo objectforkey:@"cross"];
           
            nsstring *cross1= [cross objectforkey:@"1"];
            //解析json到各个字符串
            //发送者
            [parser release];
            nslog(@"cross1: %@",cross1);

- (void)appendstring:(nsstring *)astring;、
- (void)appendformat:(nsstring *)format, ... ns_format_function(1,2);

-(nsstring *) getjsonstring
{
    nsmutablestring *json = [nsmutablestring stringwithcapacity:128];
    nsstring *jsonstring=nil;
    sbjsonwriter *writer = [[sbjsonwriter alloc] init];
    [json appendstring:@"{\"data\":{"];
    [json appendformat:@"\"%@\":\"%d\",",@"reset",reset];
    if(missionstatus!=null)
    {
        jsonstring=[writer stringwithobject:status];
        if(jsonstring!=null)
        {
            [json appendstring:@"\"status\":"];
            [json appendstring:jsonstring];
        }
    }
    [json appendstring:@"}}"];
    return json;
}

nsdictionary *datadictionary= [nsdictionary dictionarywithobjectsandkeys:mac,@"mac",
                                   game,@"game",
                                   devicetoken,@"devicetoken",
                                   device,@"device",
                                   gv,@"gv",
                                   lang,@"lang",
                                   os,@"os",
                                   hardware,@"hardware",
                                   down,@"down",nil];
    nsdictionary *parmdictionary= [nsdictionary dictionarywithobjectsandkeys:@"getsession",@"act",
                                   datadictionary,@"data",nil];
    nsdictionary *jsondictionary=[nsdictionary dictionarywithobjectsandkeys:pv,@"pv",
                                  parmdictionary,@"param",nil];
    sbjsonwriter *writer = [[sbjsonwriter alloc] init];
   
    nsstring *jsonstring=nil;
    jsonstring=[writer stringwithobject:jsondictionary];
    nslog(@"%@",jsonstring);