Android的 - 解析使用GSON JSON [英] Android - Parse JSON using GSON
问题描述
我想从JSON是字符串类型的分析数据。我使用谷歌GSON。我不知道我怎样才能得到OriginalTerm，这JSON字符串的FirstTranslation的信息：
I would like to parse data from JSON which is String type. I am using Google Gson. I'm wondering how can I get "OriginalTerm" and "FirstTranslation" information of this Json String:
{
"term0" : {
"PrincipalTranslations" : {
"0" :{
"OriginalTerm" : { "term" : "cat", "POS" : "n", "sense" : "domestic animal", "usage" : ""},
"FirstTranslation" : {"term" : "gato", "POS" : "nm", "sense" : " "}, "Note" : ""},
"1" :{
"OriginalTerm" : { "term" : "cat", "POS" : "n", "sense" : "member of cat family", "usage" : ""},
"FirstTranslation" : {"term" : "felino", "POS" : "nm", "sense" : "familia de animales"}, "Note" : ""}},
"AdditionalTranslations" : {
"0" :{
"OriginalTerm" : { "term" : "cat", "POS" : "n", "sense" : "guy", "usage" : "slang"},
"FirstTranslation" : {"term" : "tío, tipo, chaval", "POS" : "nm", "sense" : "coloq"},
"SecondTranslation" : {"term" : "vato", "POS" : "", "sense" : "Mex"}, "Note" : ""},
"original" : {
"Compounds" : {
"0" :{
"OriginalTerm" : { "term" : "alley cat", "POS" : "n", "sense" : "stray cat", "usage" : ""},
"FirstTranslation" : {"term" : "gato callejero", "POS" : "nm", "sense" : ""}, "Note" : ""},
"Lines" : "End Reached", "END" : true
}
我试着以下信息，但我不解决这个问题：
I tried following these information but I can't solve it:
http://albertattard.blogspot.com。 ES / 2009/06 /
JSON parsing using Gson for java
我试图用GSON使用POJO来序列化，但我无法找到合适的结构，我尝试使用的JSONObject过，通过对象键跳跃，如term0，PrincipalTranslations但我有当我多个结果有些麻烦对于相同的键，例如：
I tried to serialized using GSON using POJO but I can't find the right structure, I tried using JsonObject too, jumping through object keys like "term0","PrincipalTranslations" but I have some trouble when I've multiple results for the same key, for example:
"0" :{
"OriginalTerm"....
"FirstTranslation"...
"1" :{
"OriginalTerm"....
"FirstTranslation"...
}
感谢您提前。
推荐答案
解析可以使用映射一比一的JSON文本与你的对象POJO来完成与GSON一个JSON。但是，因为你需要的JSON字符串的一部分，你可以利用 JsonParser 对象，它可以让你得到的只是你的JSON的部分。
Parsing a JSON with Gson can be done using a POJO that maps one-to-one your JSON text with your object. But, since you need only part of the JSON string, you can take advantage of JsonParser object that allows you to get a portion only of your JSON.
所以，你可以得到 PrincipalTranslation 部分，然后应用POJO策略牢记，你至少有两种结构：你的期限和两期限和记组成（我称之为项目）
So you can get PrincipalTranslation part and then apply the POJO strategy keeping in mind that you have at least two structures: your Term and a composition of two Terms and a note (that I called Item).
请记住，POJO我写的是不遵守的Java命名惯例，这样你就可以添加的标注使用不同的成员变量名。
Keep in mind that POJO I write are not following Java naming convention, so you can add an annotation to use a different member variable name.
下面是c您一个$ C $可以粘贴在你的IDE中运行试试。
Here's a code you can paste and run in you IDE to try.
package stackoverflow.questions;
import java.lang.reflect.Type;
import java.util.*;
import com.google.gson.*;
import com.google.gson.reflect.TypeToken;
public class Q20337652 {
public static class Term {
String term;
String POS;
String sense;
String usage;
@Override
public String toString() {
return "Term [term=" + term + ", POS=" + POS + ", sense=" + sense + ", usage=" + usage + "]";
}
}
public static class Item {
Term OriginalTerm;
Term FirstTranslation;
String Note;
@Override
public String toString() {
return "Item [OriginalTerm=" + OriginalTerm + ", FirstTranslation=" + FirstTranslation + ", Note=" + Note + "]";
}
}
public static void main(String[] args){
String json =
" { "+
" "+
" \"term0\" : { "+
" \"PrincipalTranslations\" : { "+
" \"0\" :{ "+
" \"OriginalTerm\" : { \"term\" : \"cat\", \"POS\" : \"n\", \"sense\" : \"domestic animal\", \"usage\" : \"\"}, "+
" \"FirstTranslation\" : {\"term\" : \"gato\", \"POS\" : \"nm\", \"sense\" : \" \"}, \"Note\" : \"\"}, "+
" \"1\" :{ "+
" \"OriginalTerm\" : { \"term\" : \"cat\", \"POS\" : \"n\", \"sense\" : \"member of cat family\", \"usage\" : \"\"}, "+
" \"FirstTranslation\" : {\"term\" : \"felino\", \"POS\" : \"nm\", \"sense\" : \"familia de animales\"}, \"Note\" : \"\"}},"+
" \"AdditionalTranslations\" : { "+
" \"0\" :{ "+
" \"OriginalTerm\" : { \"term\" : \"cat\", \"POS\" : \"n\", \"sense\" : \"guy\", \"usage\" : \"slang\"}, "+
" \"FirstTranslation\" : {\"term\" : \"tío, tipo, chaval\", \"POS\" : \"nm\", \"sense\" : \"coloq\"}, "+
" \"SecondTranslation\" : {\"term\" : \"vato\", \"POS\" : \"\", \"sense\" : \"Mex\"}, \"Note\" : \"\"}, "+
" "+
" \"original\" : { "+
" \"Compounds\" : { "+
" \"0\" :{ "+
" \"OriginalTerm\" : { \"term\" : \"alley cat\", \"POS\" : \"n\", \"sense\" : \"stray cat\", \"usage\" : \"\"}, "+
" \"FirstTranslation\" : {\"term\" : \"gato callejero\", \"POS\" : \"nm\", \"sense\" : \"\"}, \"Note\" : \"\"}, "+
" \"Lines\" : \"End Reached\", \"END\" : true "+
" "+
" } "+
" } }}} ";
JsonParser jp = new JsonParser();
JsonElement je = jp.parse(json);
JsonElement je2 = je.getAsJsonObject().get("term0");
JsonElement je3 = je2.getAsJsonObject().get("PrincipalTranslations");
Type mapType = new TypeToken<Map<String, Item>>() {}.getType();
Map<String, Item> principalTranslation = new Gson().fromJson(je3, mapType);
System.out.println(principalTranslation);
}
}
这是我的执行：
And this is my execution:
{0=Item [OriginalTerm=Term [term=cat, POS=n, sense=domestic animal, usage=], FirstTranslation=Term [term=gato, POS=nm, sense= , usage=null], Note=],
1=Item [OriginalTerm=Term [term=cat, POS=n, sense=member of cat family, usage=], FirstTranslation=Term [term=felino, POS=nm, sense=familia de animales, usage=null], Note=]}
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