google Json，googlejson

google Json，googlejson

gradle倉庫地址：

// https://mvnrepository.com/artifact/com.google.code.gson/gson
compile group: 'com.google.code.gson', name: 'gson', version: '2.8.0'

package utils;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.internal.$Gson$Types;
import com.google.gson.reflect.TypeToken;

import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * JSON對象映射解析工具類
 *
 * @author audaque
 *
 */
public class GsonUtils {

    public static <T> T getObject(String jsonString, Class<T> cls) {
        T t = null;
        try {
            GsonBuilder builder = new GsonBuilder();
            DateDeserializer deserializer = new DateDeserializer();
            builder.registerTypeAdapter(Date.class, deserializer);
            Gson gson = builder.create();
            t = gson.fromJson(jsonString, cls);

        } catch (Exception e) {
            Logger.getLogger(GsonUtils.class.getName()).log(Level.SEVERE, null, e);
        }
        return t;
    }

    public static <T> List<T> getObjects(String jsonString, Class<T> cls) {
        try {
            GsonBuilder builder = new GsonBuilder();
            DateDeserializer deserializer = new DateDeserializer();
            builder.registerTypeAdapter(Date.class, deserializer);
            Gson gson = builder.create();
            Type tp = $Gson$Types.newParameterizedTypeWithOwner(null, (Type) List.class, cls);
            return gson.fromJson(jsonString, tp);
        } catch (Exception e) {
            Logger.getLogger(GsonUtils.class.getName()).log(Level.SEVERE, null, e);
        }
        return null;
    }

    public static List<String> getList(String jsonString) {
        List<String> list = new ArrayList<String>();
        try {
            Gson gson = new Gson();
            list = gson.fromJson(jsonString, new TypeToken<List<String>>() {
            }.getType());
        } catch (Exception e) {
            Logger.getLogger(GsonUtils.class.getName()).log(Level.SEVERE, null, e);
        }
        return list;

    }

    public static List<Map<String, Object>> listKeyMap(String jsonString) {
        List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
        try {
            Gson gson = new Gson();
            list = gson.fromJson(jsonString,
                    new TypeToken<List<Map<String, Object>>>() {
                    }.getType());
        } catch (Exception e) {
            Logger.getLogger(GsonUtils.class.getName()).log(Level.SEVERE, null, e);
        }
        return list;
    }

    public static String getJsonString(Object obj) {
        String json = null;
        try {
            // Gson gson = new Gson();
            GsonBuilder builder = new GsonBuilder();
            builder.disableHtmlEscaping();
            DateSerializer serializer = new DateSerializer();
            builder.registerTypeAdapter(Date.class, serializer);
            Gson gson = builder.create();
            json = gson.toJson(obj);
        } catch (Exception e) {
            Logger.getLogger(GsonUtils.class.getName()).log(Level.SEVERE, null, e);
        }
        return json;
    }

}