java怎么解析[开头的json
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怎么用java解析
["Title":"济南天气预报","Description":"","PicUrl":"","Url":"","Title":"周一(今天, 实时:21℃)\n阴转多云 南风微风 22 ~ 14℃","Description":"","PicUrl":"http://api.map.baidu.com/images/weather/day/yin.png","Url":"","Title":"周二\n晴 南风3-4级 24 ~ 14℃","Description":"","PicUrl":"http://api.map.baidu.com/images/weather/day/qing.png","Url":"","Title":"周三\n晴转阴 南风3-4级 24 ~ 11℃","Description":"","PicUrl":"http://api.map.baidu.com/images/weather/day/qing.png","Url":"","Title":"周四\n多云转晴 北风3-4级 19 ~ 7℃","Description":"","PicUrl":"http://api.map.baidu.com/images/weather/day/duoyun.png","Url":""]
有JSONArray类型的变量,也就是JSON数组,可以把这个字符串转换成json数组
String str=“XXXXXXXX”;
JSONArray oArray=new JSONArray(str);
然后通过这个json数组就可以获得各个部分了 参考技术A 一个当成一个对象,一个里面的“”:“”当成一个属性的key-value对。然后在java中这样写:
java中用jsonStr接收json类型的对象字符串
Gson gson = new Gson();
List<Map<Strring,String>> JsonList = gson.fromJson(jsonStr,Object.class);
这里一个Map就相当于[]中的一个;
然后你循环遍历List,和从Map中取值就可以了! 参考技术B 他有专门的json Jar包的。具体你可以看看json官网。www.json.org本回答被提问者采纳
java怎么使用gson解析json字符串
Gson是谷歌推出的解析json数据以及将对象转换成json数据的一个开源框架. 现在json因其易读性和高效率而被广泛的使用着.
相对于java以及其它json的解析框架,Gson非常的好用.
简单来讲就是根据json的数据结构定义出相应的javabean --->"new"出Gson的实例gson---->gson.fromJson(jsonString,JavaBean.class) 即可.
下面给出一个实例来说明.
步骤1:目标:将从webservice传回的json
"status": 0,
"result":
"location":
"lng": 103.98964143811,
"lat": 30.586643130352
,
"formatted_address": "四川省成都市双流县北一街154",
"business": "簇桥,金花桥",
"addressComponent":
"city": "成都市",
"district": "双流县",
"province": "四川省",
"street": "北一街",
"street_number": "154"
,
"cityCode": 75
先普及下json数据格式定义: json数据只有两种格式.
一种是对象: 一个大括号包裹的内容就是一个对象.里面是无数个逗号相间隔的键值对
"firstName": "Brett", "lastName":"McLaughlin", "email": "aaaa"一种是数组:一个方括号包裹的内容就是一个数组,里面是无数个逗号相间隔的json对象
如:
"people": [
"firstName": "Brett",
"lastName": "McLaughlin",
"email": "aaaa"
,
"firstName": "Jason",
"lastName": "Hunter",
"email": "bbbb"
,
"firstName": "Elliotte",
"lastName": "Harold",
"email": "cccc"
]
步骤2 定义json数据格式对应的javaBean
private Integerstatus;
private ResultDetailresult;
public Result()
public Result(Integer status, ResultDetail result)
super();
this.status = status;
this.result = result;
public ResultDetail getResult()
return this.result;
public Integer getStatus()
return this.status;
public void setResult( ResultDetail result )
this.result = result;
public void setStatus( Integer status )
this.status = status;
@Override
public String toString()
return "Result [status=" + this.status + ", result=" + this.result
+ "]";
public class ResultDetail
Locationlocation;
Stringformatted_address;
AddressComponentaddressComponent;
Stringbusiness;
StringcityCode;
public ResultDetail()
super();
// TODO Auto-generated constructor stub
public ResultDetail(Location location, String formatted_address,
AddressComponent addressComponent, String business, String cityCode)
super();
this.location = location;
this.formatted_address = formatted_address;
this.addressComponent = addressComponent;
this.business = business;
this.cityCode = cityCode;
public AddressComponent getAddressComponent()
return this.addressComponent;
public String getBusiness()
return this.business;
public String getCityCode()
return this.cityCode;
public String getFormatted_address()
return this.formatted_address;
public Location getLocation()
return this.location;
public void setAddressComponent( AddressComponent addressComponent )
this.addressComponent = addressComponent;
public void setBusiness( String business )
this.business = business;
public void setCityCode( String cityCode )
this.cityCode = cityCode;
public void setFormatted_address( String formatted_address )
this.formatted_address = formatted_address;
public void setLocation( Location location )
this.location = location;
public class Location
Stringlng;
Stringlat;
public Location()
public Location(String lng, String lat)
this.lng = lng;
this.lat = lat;
public String getLat()
return this.lat;
public String getLng()
return this.lng;
public void setLat( String lat )
this.lat = lat;
public void setLng( String lng )
this.lng = lng;
@Override
public String toString()
return "Location [lng=" + this.lng + ", lat=" + this.lat + "]";
public class AddressComponent
Stringcity;
Stringdistrict;
Stringprovince;
Stringstreet;
Stringstreet_number;
public AddressComponent()
super();
// TODO Auto-generated constructor stub
public AddressComponent(String city, String district, String province,
String street, String street_number)
super();
this.city = city;
this.district = district;
this.province = province;
this.street = street;
this.street_number = street_number;
public String getCity()
return this.city;
public String getDistrict()
return this.district;
public String getProvince()
return this.province;
public String getStreet()
return this.street;
public String getStreet_number()
return this.street_number;
public void setCity( String city )
this.city = city;
public void setDistrict( String district )
this.district = district;
public void setProvince( String province )
this.province = province;
public void setStreet( String street )
this.street = street;
public void setStreet_number( String street_number )
this.street_number = street_number;
@Override
public String toString()
return "AddressComponent [city=" + this.city + ", district="
+ this.district + ", province=" + this.province + ", street="
+ this.street + ", street_number=" + this.street_number + "]";
测试:
jsonString ( 目标json数据,已经在最上面写好的)
Gson gson = new Gson();
Result fromJson = gson.fromJson( jsonString.toString() ,Result.class );
System.out.println( "******************************************" );
System.out.println( fromJson );
结果:
jsonString:"status":0,"result":"location":"lng":103.98964143811,"lat":30.586643130352,"formatted_address":"四川省成都市双流县北一街154","business":"簇桥,金花桥","addressComponent":"city":"成都市","district":"双流县","province":"四川省","street":"北一街","street_number":"154","cityCode":75*******************************************
Result [status=0, result=ResultDetail [location=Location [lng=103.98964143811, lat=30.586643130352], formatted_address=四川省成都市双流县北一街154, addressComponent=AddressComponent [city=成都市, district=双流县, province=四川省, street=北一街, street_number=154], business=簇桥,金花桥, cityCode=75]]
可见,jsonString已经成功的被转换成了对应的javaBean
步骤3 : 总结.说明
Gson可以很轻松的实现javaBean和jsonString之间的互转.只需要明白json如何定义.剩下的就非常简单了.
参考技术A 步骤1:目标:将从webservice传回的json1
"status": 0,
"result":
"location":
"lng": 103.98964143811,
"lat": 30.586643130352
,
"formatted_address": "四川省成都市双流县北一街154",
"business": "簇桥,金花桥",
"addressComponent":
"city": "成都市",
"district": "双流县",
"province": "四川省",
"street": "北一街",
"street_number": "154"
,
"cityCode": 75
2
先普及下json数据格式定义: json数据只有两种格式.
一种是对象: 一个大括号包裹的内容就是一个对象.里面是无数个逗号相间隔的键值对
"firstName": "Brett", "lastName":"McLaughlin", "email": "aaaa"
一种是数组:一个方括号包裹的内容就是一个数组,里面是无数个逗号相间隔的json对象
如:
"people": [
"firstName": "Brett",
"lastName": "McLaughlin",
"email": "aaaa"
,
"firstName": "Jason",
"lastName": "Hunter",
"email": "bbbb"
,
"firstName": "Elliotte",
"lastName": "Harold",
"email": "cccc"
]
END
步骤2 定义json数据格式对应的javaBean
public class Result
private Integer status;
private ResultDetail result;
public Result()
public Result(Integer status, ResultDetail result)
super();
this.status = status;
this.result = result;
public ResultDetail getResult()
return this.result;
public Integer getStatus()
return this.status;
public void setResult( ResultDetail result )
this.result = result;
public void setStatus( Integer status )
this.status = status;
@Override
public String toString()
return "Result [status=" + this.status + ", result=" + this.result
+ "]";
参考技术B 去官网下载jar包,调用方法。
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