com.gettyio.gim.utils.FastJsonUtil Maven / Gradle / Ivy

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/*
 * Copyright 2019 The Getty Project
 *
 * The Getty Project licenses this file to you 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.gettyio.gim.utils;


import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.TypeReference;
import com.alibaba.fastjson.serializer.SerializeConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.serializer.SimpleDateFormatSerializer;

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


/**
 * Created by gogym on 2017/8/15.
 * Result obj = (Result) JSON.parseObject(js, new
 * TypeReference>(){});
 */
public class FastJsonUtil {

    private static final SerializeConfig config;

    static {
        String dateFormat = "yyyy-MM-dd HH:mm:ss";
        config = new SerializeConfig();
        // 使用和json-lib兼容的日期输出格式
        config.put(java.util.Date.class, new SimpleDateFormatSerializer(dateFormat));
        // 使用和json-lib兼容的日期输出格式
        config.put(java.sql.Date.class, new SimpleDateFormatSerializer(dateFormat));
    }

    private static final SerializerFeature[] features = {
            // 输出空置字段
            SerializerFeature.WriteMapNullValue,
            // list字段如果为null，输出为[]，而不是null
            SerializerFeature.WriteNullListAsEmpty,
            // 数值字段如果为null，输出为0，而不是null
            SerializerFeature.WriteNullNumberAsZero,
            // Boolean字段如果为null，输出为false，而不是null
            SerializerFeature.WriteNullBooleanAsFalse,
            // 字符类型字段如果为null，输出为""，而不是null
            SerializerFeature.WriteNullStringAsEmpty
    };

    public static String toJSONString(Object object) {
        return JSON.toJSONString(object, config, features);
    }

    public static String toJSONNoFeatures(Object object) {
        return JSON.toJSONString(object, config);
    }

    public static Object toBean(String text) {
        return JSON.parse(text);
    }

    public static  T toBean(String text, Class clazz) {
        return JSON.parseObject(text, clazz);
    }

    public static  T toBean(String str, TypeReference type) {
        return JSON.parseObject(str, type);
    }


    /**
     * 转换为数组
     *
     * @param text
     * @param 
     * @return
     */
    public static  Object[] toArray(String text) {
        return toArray(text, null);
    }


    /**
     * 转换为数组
     *
     * @param text
     * @param clazz
     * @param 
     * @return
     */
    public static  Object[] toArray(String text, Class clazz) {
        return JSON.parseArray(text, clazz).toArray();
    }


    /**
     * 转换为List
     *
     * @param text
     * @param clazz
     * @param 
     * @return
     */
    public static  List toList(String text, Class clazz) {
        return JSON.parseArray(text, clazz);
    }

    /**
     * 将javabean转化为序列化的json字符串
     *
     * @param keyvalue
     * @return
     */
    public static Object beanToJson(Map keyvalue) {
        String textJson = JSON.toJSONString(keyvalue);
        Object objectJson = JSON.parse(textJson);
        return objectJson;
    }

    /**
     * 将string转化为序列化的json字符串
     *
     * @param text
     * @return
     */
    public static JSONObject textToJson(String text) {
        JSONObject objectJson = JSON.parseObject(text);
        return objectJson;
    }

    /**
     * json字符串转化为map
     *
     * @param s
     * @return
     */
    public static Map stringToCollect(String s) {
        Map m = JSONObject.parseObject(s);
        return m;
    }

    /**
     * 将map转化为string
     *
     * @param m
     * @return
     */
    public static String collectToString(Map m) {
        String s = JSONObject.toJSONString(m);
        return s;
    }
}