我有一个JSON响应：
{
"results" : [
{
"address_components" : [
{
"long_name" : "3",
"short_name" : "3",
"types" : [ "street_number" ]
},
{
"long_name" : "1033",
"short_name" : "1033",
"types" : []
},
{
"long_name" : "K osmidomkům",
"short_name" : "K osmidomkům",
"types" : [ "route" ]
},
{
"long_name" : "Praha-Suchdol",
"short_name" : "Praha-Suchdol",
"types" : [ "sublocality", "political" ]
},
{
"long_name" : "Praha",
"short_name" : "Praha",
"types" : [ "locality", "political" ]
},
{
"long_name" : "Hlavní město Praha",
"short_name" : "Hlavní město Praha",
"types" : [ "administrative_area_level_2", "political" ]
},
{
"long_name" : "Hlavní město Praha",
"short_name" : "Hlavní město Praha",
"types" : [ "administrative_area_level_1", "political" ]
},
{
"long_name" : "Česká republika",
"short_name" : "CZ",
"types" : [ "country", "political" ]
},
{
"long_name" : "165 00",
"short_name" : "165 00",
"types" : [ "postal_code" ]
},
{
"long_name" : "Praha 620",
"short_name" : "Praha 620",
"types" : [ "postal_town" ]
}
],
"formatted_address" : "K osmidomkům 1033/3, 165 00 Praha-Praha-Suchdol, Česká republika",
"geometry" : {
"location" : {
"lat" : 50.13670170,
"lng" : 14.36865280
},
"location_type" : "ROOFTOP",
"viewport" : {
"northeast" : {
"lat" : 50.13805068029150,
"lng" : 14.37000178029150
},
"southwest" : {
"lat" : 50.13535271970850,
"lng" : 14.36730381970850
}
}
},
"types" : [ "street_address" ]
}
],
"status" : "OK"
}
现在我需要通过GSON处理JSON，但我只需要来自“geometry”的部分。我需要位置（lat，lng）。如何将这片json绑定到POJO？我的意思是那样的
public class GoogleMapLocation
{
@SerializedName("lat")
private double latitude;
@SerializedName("lng")
private double longitude;
public double getLatitude()
{
return latitude;
}
public void setLatitude(final double latitude)
{
this.latitude = latitude;
}
public double getLongitude()
{
return longitude;
}
public void setLongitude(final double longitude)
{
this.longitude = longitude;
}
}
然后
GoogleMapLocation gml = gson.fromJson(jsonReader, GoogleMapLocation.class);
答案 0 :(得分：2)
这应该有用（getter，setter，...为清晰起见省略，不防错）：
public class GoogleMapLocation {
List<Result> results;
String status;
}
public class Result {
@SerializedName("address_components")
private List<AddressComponent> addressComponents;
@SerializedName("formatted_address")
private String formattedAddress;
private Geometry geometry;
@SerializedName("partial_match")
private String partialMatch; // not sure of the type
private List<String> types;
}
public class AddressComponents {
@SerializedName("long_name")
private String longName;
@SerializedName("short_name")
private String shortName;
private List<String> types;
}
public class Geometry {
LatLng location;
Viewport viewport;
Viewport bounds;
@SerializedName("location_type")
String locationType;
}
public class LatLng {
@SerializedName("lat");
private double latitude;
@SerializedName("lng");
private double longitude;
}
public class Viewport {
private LatLng northeast;
private LatLng southwest;
}
编辑：请注意，某些字段也可以声明为枚举（status，...）
答案 1 :(得分：0)
采用RC的代码制作完整的工作样本
Test课程，以获取Geometry内容。
package com.yourcomp.test2;
import com.google.gson.Gson;
public class Test {
public static void main(String[] args) {
String test = "{" +
" \"results\" : [" +
" {" +
" \"address_components\" : [" +
" {" +
" \"long_name\" : \"3\"," +
" \"short_name\" : \"3\"," +
" \"types\" : [ \"street_number\" ]" +
" }," +
" {" +
" \"long_name\" : \"1033\"," +
" \"short_name\" : \"1033\"," +
" \"types\" : []" +
" }," +
" {" +
" \"long_name\" : \"K osmidomkum\"," +
" \"short_name\" : \"K osmidomkum\"," +
" \"types\" : [ \"route\" ]" +
" }," +
" {" +
" \"long_name\" : \"Praha-Suchdol\"," +
" \"short_name\" : \"Praha-Suchdol\"," +
" \"types\" : [ \"sublocality\", \"political\" ]" +
" }," +
" {" +
" \"long_name\" : \"Praha\"," +
" \"short_name\" : \"Praha\"," +
" \"types\" : [ \"locality\", \"political\" ]" +
" }," +
" {" +
" \"long_name\" : \"Hlavní mesto Praha\"," +
" \"short_name\" : \"Hlavní mesto Praha\"," +
" \"types\" : [ \"administrative_area_level_2\", \"political\" ]" +
" }," +
" {" +
" \"long_name\" : \"Hlavní mesto Praha\"," +
" \"short_name\" : \"Hlavní mesto Praha\"," +
" \"types\" : [ \"administrative_area_level_1\", \"political\" ]" +
" }," +
" {" +
" \"long_name\" : \"Ceská republika\"," +
" \"short_name\" : \"CZ\"," +
" \"types\" : [ \"country\", \"political\" ]" +
" }," +
" {" +
" \"long_name\" : \"165 00\"," +
" \"short_name\" : \"165 00\"," +
" \"types\" : [ \"postal_code\" ]" +
" }," +
" {" +
" \"long_name\" : \"Praha 620\"," +
" \"short_name\" : \"Praha 620\"," +
" \"types\" : [ \"postal_town\" ]" +
" }" +
" ]," +
" \"formatted_address\" : \"K osmidomkum 1033/3, 165 00 Praha-Praha-Suchdol, Ceská republika\"," +
" \"geometry\" : {" +
" \"location\" : {" +
" \"lat\" : 50.13670170," +
" \"lng\" : 14.36865280" +
" }," +
" \"location_type\" : \"ROOFTOP\"," +
" \"viewport\" : {" +
" \"northeast\" : {" +
" \"lat\" : 50.13805068029150," +
" \"lng\" : 14.37000178029150" +
" }," +
" \"southwest\" : {" +
" \"lat\" : 50.13535271970850," +
" \"lng\" : 14.36730381970850" +
" }" +
" }" +
" }," +
" \"types\" : [ \"street_address\" ]" +
" }" +
" ]," +
" \"status\" : \"OK\"" +
"}";
GoogleMapLocation res = new Gson().fromJson(test, GoogleMapLocation.class);
System.out.println(res);
Geometry geometry = res.getResults().get(0).getGeometry();
System.out.println(geometry);
}
}
GoogleMapLocation班
package com.yourcomp.test2;
import java.util.List;
import com.google.gson.annotations.SerializedName;
public class GoogleMapLocation {
List<Result> results;
String status;
/**
* Gets the results.
*
* @return <tt> the results.</tt>
*/
public List<Result> getResults() {
return results;
}
/**
* Sets the results.
*
* @param results
* <tt> the results to set.</tt>
*/
public void setResults(List<Result> results) {
this.results = results;
}
/**
* Gets the status.
*
* @return <tt> the status.</tt>
*/
public String getStatus() {
return status;
}
/**
* Sets the status.
*
* @param status
* <tt> the status to set.</tt>
*/
public void setStatus(String status) {
this.status = status;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return "GoogleMapLocation [results=" + results + ", status=" + status
+ "]";
}
}
class Result {
@SerializedName("address_components")
private List<AddressComponents> addressComponents;
/**
* Gets the addressComponents.
*
* @return <tt> the addressComponents.</tt>
*/
public List<AddressComponents> getAddressComponents() {
return addressComponents;
}
/**
* Sets the addressComponents.
*
* @param addressComponents
* <tt> the addressComponents to set.</tt>
*/
public void setAddressComponents(List<AddressComponents> addressComponents) {
this.addressComponents = addressComponents;
}
/**
* Gets the formattedAddress.
*
* @return <tt> the formattedAddress.</tt>
*/
public String getFormattedAddress() {
return formattedAddress;
}
/**
* Sets the formattedAddress.
*
* @param formattedAddress
* <tt> the formattedAddress to set.</tt>
*/
public void setFormattedAddress(String formattedAddress) {
this.formattedAddress = formattedAddress;
}
/**
* Gets the geometry.
*
* @return <tt> the geometry.</tt>
*/
public Geometry getGeometry() {
return geometry;
}
/**
* Sets the geometry.
*
* @param geometry
* <tt> the geometry to set.</tt>
*/
public void setGeometry(Geometry geometry) {
this.geometry = geometry;
}
/**
* Gets the partialMatch.
*
* @return <tt> the partialMatch.</tt>
*/
public String getPartialMatch() {
return partialMatch;
}
/**
* Sets the partialMatch.
*
* @param partialMatch
* <tt> the partialMatch to set.</tt>
*/
public void setPartialMatch(String partialMatch) {
this.partialMatch = partialMatch;
}
/**
* Gets the types.
*
* @return <tt> the types.</tt>
*/
public List<String> getTypes() {
return types;
}
/**
* Sets the types.
*
* @param types
* <tt> the types to set.</tt>
*/
public void setTypes(List<String> types) {
this.types = types;
}
@SerializedName("formatted_address")
private String formattedAddress;
private Geometry geometry;
@SerializedName("partial_match")
private String partialMatch; // not sure of the type
private List<String> types;
/*
* (non-Javadoc)
*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return "Result [addressComponents=" + addressComponents
+ ", formattedAddress=" + formattedAddress + ", geometry="
+ geometry + ", partialMatch=" + partialMatch + ", types="
+ types + "]";
}
}
class AddressComponents {
private String long_name;
private String short_name;
private List<String> types;
/*
* (non-Javadoc)
*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return "AddressComponents [long_name=" + long_name + ", short_name="
+ short_name + ", types=" + types + "]";
}
/**
* Gets the long_name.
*
* @return <tt> the long_name.</tt>
*/
public String getLong_name() {
return long_name;
}
/**
* Sets the long_name.
*
* @param long_name
* <tt> the long_name to set.</tt>
*/
public void setLong_name(String long_name) {
this.long_name = long_name;
}
/**
* Gets the short_name.
*
* @return <tt> the short_name.</tt>
*/
public String getShort_name() {
return short_name;
}
/**
* Sets the short_name.
*
* @param short_name
* <tt> the short_name to set.</tt>
*/
public void setShort_name(String short_name) {
this.short_name = short_name;
}
/**
* Gets the types.
*
* @return <tt> the types.</tt>
*/
public List<String> getTypes() {
return types;
}
/**
* Sets the types.
*
* @param types
* <tt> the types to set.</tt>
*/
public void setTypes(List<String> types) {
this.types = types;
}
}
class Geometry {
LatLng location;
Viewport viewport;
Viewport bounds;
@SerializedName("location_type")
String locationType;
/**
* Gets the location.
*
* @return <tt> the location.</tt>
*/
public LatLng getLocation() {
return location;
}
/**
* Sets the location.
*
* @param location
* <tt> the location to set.</tt>
*/
public void setLocation(LatLng location) {
this.location = location;
}
/**
* Gets the viewport.
*
* @return <tt> the viewport.</tt>
*/
public Viewport getViewport() {
return viewport;
}
/**
* Sets the viewport.
*
* @param viewport
* <tt> the viewport to set.</tt>
*/
public void setViewport(Viewport viewport) {
this.viewport = viewport;
}
/**
* Gets the bounds.
*
* @return <tt> the bounds.</tt>
*/
public Viewport getBounds() {
return bounds;
}
/**
* Sets the bounds.
*
* @param bounds
* <tt> the bounds to set.</tt>
*/
public void setBounds(Viewport bounds) {
this.bounds = bounds;
}
/**
* Gets the locationType.
*
* @return <tt> the locationType.</tt>
*/
public String getLocationType() {
return locationType;
}
/**
* Sets the locationType.
*
* @param locationType
* <tt> the locationType to set.</tt>
*/
public void setLocationType(String locationType) {
this.locationType = locationType;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return "Geometry [location=" + location + ", viewport=" + viewport
+ ", bounds=" + bounds + ", locationType=" + locationType + "]";
}
}
class LatLng {
@SerializedName("lat")
private double latitude;
@SerializedName("lng")
private double longitude;
/**
* Gets the latitude.
*
* @return <tt> the latitude.</tt>
*/
public double getLatitude() {
return latitude;
}
/**
* Sets the latitude.
*
* @param latitude
* <tt> the latitude to set.</tt>
*/
public void setLatitude(double latitude) {
this.latitude = latitude;
}
/**
* Gets the longitude.
*
* @return <tt> the longitude.</tt>
*/
public double getLongitude() {
return longitude;
}
/**
* Sets the longitude.
*
* @param longitude
* <tt> the longitude to set.</tt>
*/
public void setLongitude(double longitude) {
this.longitude = longitude;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return "LatLng [latitude=" + latitude + ", longitude=" + longitude
+ "]";
}
}
class Viewport {
private LatLng northeast;
/**
* Gets the northeast.
*
* @return <tt> the northeast.</tt>
*/
public LatLng getNortheast() {
return northeast;
}
/**
* Sets the northeast.
*
* @param northeast
* <tt> the northeast to set.</tt>
*/
public void setNortheast(LatLng northeast) {
this.northeast = northeast;
}
/**
* Gets the southwest.
*
* @return <tt> the southwest.</tt>
*/
public LatLng getSouthwest() {
return southwest;
}
/**
* Sets the southwest.
*
* @param southwest
* <tt> the southwest to set.</tt>
*/
public void setSouthwest(LatLng southwest) {
this.southwest = southwest;
}
private LatLng southwest;
/*
* (non-Javadoc)
*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return "Viewport [northeast=" + northeast + ", southwest=" + southwest
+ "]";
}
}