com.android.common.util.JsonUtils.java Source code

Introduction

Here is the source code for com.android.common.util.JsonUtils.java

Source

/*
 * Copyright (C) 2016 venshine.cn@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.android.common.util;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * Json
 *
 * @author venshine
 */
public class JsonUtils {

    /**
     * Convert object, list, ... to Json
     *
     * @param obj
     * @return
     */
    public static String toJson(Object obj) {
        Gson gson = new Gson();
        return gson.toJson(obj);
    }

    /**
     * Convert a json string to Object
     *
     * @param json
     * @param clazz
     * @return
     */
    public static <T> T jsonToObject(String json, Class<T> clazz) {
        Gson gson = new Gson();
        return gson.fromJson(json, clazz);
    }

    /**
     * Convert a json string to List<?>
     *
     * @param json
     * @return
     */
    public static <T> List<T> jsonToList(String json) {
        Gson gson = new Gson();
        return gson.fromJson(json, new TypeToken<List<T>>() {
        }.getType());
    }

    /**
     * Convert a json string to ArrayList<?>
     *
     * @param json
     * @return
     */
    public static <T> ArrayList<T> jsonToArrayList(String json) {
        Gson gson = new Gson();
        return gson.fromJson(json, new TypeToken<ArrayList<T>>() {
        }.getType());
    }

    /**
     * Convert a json string to Map<?, ?>
     *
     * @param json
     * @return
     */
    public static <K, V> Map<K, V> jsonToMap(String json) {
        Gson gson = new Gson();
        return gson.fromJson(json, new TypeToken<Map<K, V>>() {
        }.getType());
    }

    /**
     * Convert a json string to Generic<T>
     *
     * @param json
     * @param <T>
     * @return
     */
    public static <T> T jsonToGeneric(String json, TypeToken<T> token) {
        Gson gson = new Gson();
        return gson.fromJson(json, token.getType());
    }

}