com.minlia.cloud.utils.Json Maven / Gradle / Ivy

Go to download
package com.minlia.cloud.utils;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.serializer.*;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.sql.Timestamp;
import java.util.*;

public class Json extends com.alibaba.fastjson.JSON {

    protected static Logger logger = LoggerFactory.getLogger(Json.class);
    private static SerializeFilter valueFilter = new ValueFilter() {
        public Object process(Object obj, String s, Object v) {
            if (v == null)
                return "";
            return v;
        }
    };

    /**
     * 默认的处理时间
     *
     * @param obj
     * @return
     */
    public static String toJsonString(Object obj) {
        return Json.toJSONStringWithDateFormat(obj, PreconditionsHelper.TIME_FORMAT, SerializerFeature.WriteDateUseDateFormat);
    }

    public static Object toJson(Object obj) {
        if (obj != null)
            if (obj instanceof Collection) {
                JSONArray json = new JSONArray();
                json.addAll((Collection) obj);
                return json;
            } else if (obj instanceof Map) {
                return new JSONObject((Map) obj);
            }
        return obj;
    }

    public static final String toJSONDateString(Object object, String dataFmt, String... filters) {
        return toJSONString(object, dataFmt, Lists.newArrayList(filters), false);
    }

    public static final String toJSONString(Object object, String... filters) {
        return toJSONString(object, PreconditionsHelper.TIME_FORMAT, Lists.newArrayList(filters), false);
    }

    public static final String toJSONString(Object object, String dataFmt, List filter, boolean isWriteNullStringAsEmpty) {
        SerializeWriter out = new SerializeWriter();
        try {
            JSONSerializer serializer = new JSONSerializer(out);
            serializer.config(SerializerFeature.WriteNullStringAsEmpty, false);
            serializer.config(SerializerFeature.WriteDateUseDateFormat, true);
            if (PreconditionsHelper.isNotEmpty(dataFmt))
                serializer.setDateFormat(dataFmt);
            if (isWriteNullStringAsEmpty)
                setFilter(serializer, valueFilter);
            if (filter != null) {
                String[] strs = new String[filter.size()];
                for (int i = 0; i < filter.size(); i++) {
                    strs[i] = filter.get(i);
                }
                ComplexPropertyPreFilter f = new ComplexPropertyPreFilter(strs);
                setFilter(serializer, f);

            }
            serializer.write(object);

            return out.toString();
        } finally {
            out.close();
        }
    }

    private static void setFilter(JSONSerializer serializer, SerializeFilter filter) {
        if (filter == null) {
            return;
        }

        if (filter instanceof PropertyPreFilter) {
            serializer.getPropertyPreFilters().add((PropertyPreFilter) filter);
        }

        if (filter instanceof NameFilter) {
            serializer.getNameFilters().add((NameFilter) filter);
        }

        if (filter instanceof ValueFilter) {
            serializer.getValueFilters().add((ValueFilter) filter);
        }

        if (filter instanceof PropertyFilter) {
            serializer.getPropertyFilters().add((PropertyFilter) filter);
        }

        if (filter instanceof BeforeFilter) {
            serializer.getBeforeFilters().add((BeforeFilter) filter);
        }

        if (filter instanceof AfterFilter) {
            serializer.getAfterFilters().add((AfterFilter) filter);
        }
    }

    /**
     * 禁止循环引用
     *
     * @param object
     * @param dateFormat
     * @return
     */
    public static String toJsonStringDisAbleCircule(Object object, String dateFormat) {
        SerializeConfig mapping = new SerializeConfig();
        SimpleDateFormatSerializer simpleDateFormatSerializer = new SimpleDateFormatSerializer(dateFormat);
        mapping.put(Date.class, simpleDateFormatSerializer);
        mapping.put(Timestamp.class, simpleDateFormatSerializer);
        return Json.toJSONString(object, mapping, SerializerFeature.DisableCircularReferenceDetect);
    }

    public static Map toMap(JSONObject jsonObject) {
        Map data = Maps.newHashMap();
        // 将json字符串转换成jsonObject
        Iterator it = jsonObject.keySet().iterator();
        // 遍历jsonObject数据，添加到Map对象
        while (it.hasNext()) {
            String key = String.valueOf(it.next());
            Object value = jsonObject.get(key);
            data.put(key, value);
        }
        return data;
    }

    public static List> toMapList(JSONArray jsonArray) {
        List> list = Lists.newArrayList();
        for (int i = 0; i < jsonArray.size(); i++) {
            list.add(toMap(jsonArray.getJSONObject(i)));
        }
        return list;
    }

}