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App.java
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55 lines (39 loc) · 1.34 KB
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package com.hmkcode;
import java.lang.reflect.Type;
import java.util.LinkedList;
import java.util.List;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import com.hmkcode.vo.Article;
public class App
{
public static void main( String[] args )
{
Gson gson = new Gson();
List<Article> articles = new LinkedList<Article>();
articles.add(createArticle());
articles.add(createArticle());
// Java --> JSON
String json = gson.toJson(articles);
System.out.println("toJson: "+json);
// JSON --> Java
List list = gson.fromJson(json, List.class);
System.out.println("fromJson: "+list);
System.out.println("Class Type: "+list.get(0).getClass());
// JSON --> Java "Get the actual type"
Type type = new TypeToken<List<Article>>(){}.getType();
list = gson.fromJson(json, type);
System.out.println("fromJson: "+list);
System.out.println("Class Type: "+list.get(0).getClass());
}
private static Article createArticle(){
Article article = new Article();
article.setTitle("GSON - Java JSON Library");
article.setUrl("http://hmkcode.com/gson-json-java");
article.addCategory("Java");
article.addTag("Java");
article.addTag("GSON");
article.addTag("JSON");
return article;
}
}