示例JSON对象如下所示:
[{"Title":"John Doe","Address":{"AddressLines":["The Place","123 New Place","London","England"],"Postcode":"NW7 XXY"},"Telephone":"0012345","Email":"","Latitude":51.5024472101345,"Longitude":-0.557585646554,"Easting":500623,"Northing":179647}]
假设通过链接www.domain.com访问上述对象,我有以下类来表示数据
public class LocationData extends Data{
private Address Address;
private String Telephone;
private String Email;
private String Latitude;
private String Longitude;
private String Easting;
private String Northing;
public Address getAddress() {
return Address;
}
public void setAddress(Address address) {
Address = address;
}
public String getTelephone() {
return Telephone;
}
public void setTelephone(String telephone) {
Telephone = telephone;
}
public String getEmail() {
return Email;
}
public void setEmail(String email) {
Email = email;
}
public String getLatitude() {
return Latitude;
}
public void setLatitude(String latitude) {
Latitude = latitude;
}
public String getLongitude() {
return Longitude;
}
public void setLongitude(String longitude) {
Longitude = longitude;
}
public String getEasting() {
return Easting;
}
public void setEasting(String easting) {
Easting = easting;
}
public String getNorthing() {
return Northing;
}
public void setNorthing(String northing) {
Northing = northing;
}
}
地址类如下:
public class Address {
public String[] AddressLines;
public String Postcode;
public String getPostcode() {
return Postcode;
}
public void setPostcode(String postcode) {
Postcode = postcode;
}
public String[] getAddressLines() {
return AddressLines;
}
public void setAddressLines(String addressLines[]) {
AddressLines = addressLines;
}
}
当我尝试运行时
LocationData[] data = gson.fromJson(this.locationServiceUrl, LocationData[].class);
return data;
我收到以下错误:
预计BEGIN_ARRAY但是在上面提到的代码行中是字符串。我不确定我设置课程的方式是否有问题。注意:我正在使用数组(LocationData []数据),因为该服务返回多个位置,尽管我刚刚在上面显示的示例中包含了一个。任何关于为什么会发生这种情况的帮助非常感谢。我在这里看了一些类似的错误,但没有提供的修复似乎对我有用。
答案 0 :(得分:5)
{
"finally":[
{
"Title":"John Doe",
"Address": {
"AddressLines":[
"The Place",
"123 New Place",
"London",
"England"
],
"Postcode":"NW7XXY"
},
"Telephone":"0012345",
"Email":"",
"Latitude":51.5024472101345,
"Longitude":-0.557585646554,
"Easting":500623,
"Northing":179647
}
]
}
和解析此JSON的代码是:
public class mainData {
public List<LocationData> finally;
public String[] getLocationData() {
return AddressLines;
}
public void setLocationData(List<LocationData> finally) {
this.finally = finally;
}
}
这是因为当你使用Gson解析这种类型的Json时,你的字符串以[
开头,那么你需要在标签前加上我喜欢的({"finally": your data }
)。
实际上Gson试图映射标签及其值,但在你的情况下,你的[
并不包含Gson可以映射的标签。