JSONUtil常用工具类 依赖谷歌Gson

JsonUtil java常用工具类
依赖：

        <dependency>
            <groupId></groupId>
            <artifactId>gson</artifactId>
        </dependency>

代码：

import .*;
import ;

import ;
import ;
import ;
import ;

/**
 *
 * @author  bl
 *
 */
public class JSONUtil {

    private static Gson gson = null;

    static {
        // todo yyyy-MM-dd HH:mm:ss
        gson = new Gson();
    }

    public static synchronized Gson newInstance() {
        if (gson == null) {
            gson = new Gson();
        }
        return gson;
    }

    public static String toJson(Object obj) {
        return (obj);
    }

    public static <T> T toBean(String json, Class<T> clz) {

        return (json, clz);
    }

    public static <T> Map<String, T> toMap(String json, Class<T> clz) {
        Map<String, JsonObject> map = (json, new TypeToken<Map<String, JsonObject>>() {
        }.getType());
        Map<String, T> result = new HashMap<>();
        for (String key : ()) {
            (key, ((key), clz));
        }
        return result;
    }

    public static Map<String, Object> toMap(String json) {
        Map<String, Object> map = (json, new TypeToken<Map<String, Object>>() {
        }.getType());
        return map;
    }

    public static <T> List<T> toList(String json, Class<T> clz) {
        JsonArray array = new JsonParser().parse(json).getAsJsonArray();
        List<T> list = new ArrayList<>();
        for (final JsonElement elem : array) {
            ((elem, clz));
        }
        return list;
    }

}