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Si Wenyan common
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package com.github.siwenyan.common;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import org.apache.commons.io.FileUtils;
import org.apache.log4j.Logger;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.Map;

public class QuickJson {
    private static final Logger log = Logger.getLogger(QuickJson.class.getName());

    private final static ObjectMapper mapper = new ObjectMapper();


    public static String prettyJson(String jsonString) {
        try {
            JsonParser parser = new JsonParser();
            JsonObject json = parser.parse(jsonString).getAsJsonObject();

            Gson gson = new GsonBuilder().setPrettyPrinting().create();
            String prettyJson = gson.toJson(json);

            return prettyJson;
        } catch (Exception e) {
            return jsonString;
        }
    }

    public static String onelineJson(String jsonString) {
        try {
            JsonParser parser = new JsonParser();
            JsonObject json = parser.parse(jsonString).getAsJsonObject();

            Gson gson = new GsonBuilder().create();
            String prettyJson = gson.toJson(json);

            return prettyJson;
        } catch (Exception e) {
            return jsonString;
        }
    }

    public static String prettyJson(Object o) {
        try {
            String json = mapper.writeValueAsString(o);
            return prettyJson(json);
        } catch (JsonProcessingException e) {
            throw new RuntimeException(e);
        }
    }

    public static String onelineJson(Object o) {
        try {
            String json = mapper.writeValueAsString(o);
            return onelineJson(json);
        } catch (JsonProcessingException e) {
            throw new RuntimeException(e);
        }
    }

    public static Object readValue(File file, Class clazz) {
        try {
            return mapper.readValue(file, clazz);
        } catch (Exception e) {
            log.warn(e.getMessage());
            return null;
        }
    }

    public static String writeValueAsString(Object obj) {
        try {
            return mapper.writeValueAsString(obj);
        } catch (Exception e) {
            log.warn(e.getMessage());
            return null;
        }
    }

    private static Object readValue(String s, TypeReference typeReference) throws IOException {
        try {
            return mapper.readValue(new ByteArrayInputStream(s.getBytes()), typeReference);
        } catch (Exception e) {
            try {
                s = FileUtils.readFileToString(FileSystemUtils.findFile(s));
                return mapper.readValue(new ByteArrayInputStream(s.getBytes()), typeReference);
            } catch (Exception e1) {
                log.warn(e1.getMessage());
                return null;
            }
        }
    }

    public static List> readMaps(String s) throws IOException {
        return (List>) readValue(s, new TypeReference>>() {
        });
    }

    public static Map readMap(String s, String... paths) throws IOException {
        if (0 == paths.length) {
            return (Map) readValue(s, new TypeReference>() {
            });
        } else {
            for (String path : paths) {
                Map map = (Map) readValue(path + s, new TypeReference>() {
                });
                if (null != map) {
                    return map;
                }
            }
            return null;
        }
    }
}