Java Android-使用GSON解析JSON
我想从字符串类型的JSON解析数据。我正在使用谷歌Gson。我想知道如何获取此Json字符串的“OriginalTerm”和“FirstTranslation”信息:Java Android-使用GSON解析JSON,java,android,json,gson,Java,Android,Json,Gson,我想从字符串类型的JSON解析数据。我正在使用谷歌Gson。我想知道如何获取此Json字符串的“OriginalTerm”和“FirstTranslation”信息: { "term0" : { "PrincipalTranslations" : { "0" :{ "OriginalTerm" : { "term" : "cat", "POS" : "n", "sense" : "domestic
{
"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
}
我尝试了以下信息,但无法解决:
我尝试使用POJO使用GSON进行序列化,但找不到正确的结构,我也尝试使用JsonObject,跳过对象键,如“term0”、“PrincipalTranslations”,但当我对同一个键有多个结果时,我遇到了一些问题,例如:
"0" :{
"OriginalTerm"....
"FirstTranslation"...
"1" :{
"OriginalTerm"....
"FirstTranslation"...
}
谢谢您的提前通知。我想这可能会有帮助:
这是一个解释如何使用json的视频教程。虽然不是通过GSON,但我认为在参与GSON之前,您需要了解JSON的工作原理(这相当复杂)使用GSON解析JSON可以使用一个POJO来完成,该POJO将JSON文本与对象一一映射。但是,由于您只需要JSON字符串的一部分,因此可以利用
JsonParser
对象,它只允许您获取JSON的一部分
因此,您可以获得原则翻译
部分,然后应用POJO策略,记住您至少有两种结构:您的术语
,由两个术语
和一个注释(我称之为项
)组成
请记住,我编写的POJO并没有遵循Java命名约定,所以您可以添加一个变量来使用不同的成员变量名
下面是一段代码,您可以粘贴并在IDE中运行以进行尝试
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);
}
}
你试了什么?你有什么问题?向我们展示您的代码。您需要所有数据还是只需要其中的一部分?@SLaks我试图使用POJO序列化JSON对象。我也尝试过使用JsonObject,但当我在“PrincipalTranslations”中有两个键时,我遇到了一些问题:(@giampaolo我需要“PrincipalTranslations”信息。下面是一个例子,谢谢。我尝试过类似的方法。问题是当我找到一个类似“PrincipalTranslations”的JsonObject列表时,它有两个键我是如何像JsonObject一样解析它的?谢谢@giampaolo最后我又添加了几行来存储ArrayList中的信息:
//要持久化的对象列表List firstTranslationList=new ArrayList();List originalTermList=new ArrayList();List List List=new ArrayList(principalTranslation.values());for(Item Item:list){firstTranslationList.add(Item.FirstTranslation);originalTermList.add(Item.OriginalTerm);}
再次感谢:)
{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=]}