(java) Jackson
ETC 2019. 4. 3. 21:49반응형
https://www.journaldev.com/2324/jackson-json-java-parser-api-example-tutorial#jackson-json-example
Jackson JSON Java Parser API Example Tutorial - JournalDev
Jackson JSON Java API for parsing JSON data example tutorial, ObjectMapper, JSON to POJO, JSON to Java Object, Java Object to JSON
www.journaldev.com
json파일 읽어서 맵에 추가 하기
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package chap01;
import java.io.IOException;
public class Hello {
public static void main(String args[]) throws IOException {
System.out.println("Hello World!");
App app = new App();
}
}
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package chap01;
public class ItemData
{
public int id;
public String name;
public int max_level;
public float damage_min;
public float damage_max;
public ItemData()
{
}
}
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package chap01;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Map;
public class App {
private Map<Integer, ItemData> mapItemData;
public App()
{
this.mapItemData = new HashMap<Integer, ItemData>();
}
public void Start() throws IOException
{
ObjectMapper mapper = new ObjectMapper();
System.out.println(jsonData.length);
ItemData[] arrItemData = mapper.readValue(jsonData, ItemData[].class);
System.out.println(arrItemData.length);
for(int i = 0; i<arrItemData.length; i++)
{
ItemData data = arrItemData[i];
}
System.out.println(String.format("%s, %s, %s, %s", data.id, data.name, data.damage_min, data.damage_max));
}
}
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