Gson을 이용한 JsonUtil

Gson 을 이용하여 JsonUtil을 만들어 보았다.

object mapping 과 object to Json

JsonObject 혹은 Json String에서 값 얻어오기 등 지원

https://github.com/jeng832/blog-example/tree/master/JsonUtil

JsonUtil

method list

public static T fromJson(String json, Class clazz)

• object mapping from Json String to class

public static String toJson(T obj)

• class to Json String

public static JsonObject parse(String json)

• Json String to JsonObject

public static String getValue(JsonObject object, String key)

• get String value of key from JsonObject
• Support chained key
  • key1.key2.key3
• Support array index
  • arrKey[10]
  • arrKey[0][2]
• It can throw NumberFormatException, IndexOutOfBoundsException

public static String getValue(String jsonStr, String key)

• get String value of key from Json String

public static int getValueAsInteger(String jsonStr, String key)

• get int value of key from Json String

public static int getValueAsInteger(JsonObject jsonObj, String key)

• get int value of key from JsonObject

public static long getValueAsLong(String jsonStr, String key)

• get long value of key from Json String

public static long getValueAsLong(JsonObject jsonObj, String key)

• get long value of key from JsonObject

public static double getValueAsDouble(JsonObject jsonObj, String key)

• get double value of key from JsonObject

public static double getValueAsDouble(String jsonStr, String key)

• get double value of key from Json String

public static float getValueAsFloat(JsonObject jsonObj, String key)

• get float value of key from JsonObject

public static float getValueAsFloat(String jsonStr, String key)

• get float value of key from Json String

public static boolean getValueAsBoolean(String jsonStr, String key)

• get boolean value of key from Json String

public static boolean getValueAsBoolean(JsonObject jsonObj, String key)

• get boolean value of key from JsonObject

public static boolean contain(String jsonStr, String key)

• check the key is in the Json String

public static boolean contain(JsonObject jsonObj, String key)

• check the key is in the JsonObject