com.caihan.scframe.utils.json.gson.GsonConvertUtils.java Source code

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Here is the source code for com.caihan.scframe.utils.json.gson.GsonConvertUtils.java

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/*
 * Copyright 2016 jeasonlzy(?)
 *
 * 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.caihan.scframe.utils.json.gson;

import com.google.gson.FieldNamingPolicy;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonElement;
import com.google.gson.JsonIOException;
import com.google.gson.JsonParser;
import com.google.gson.JsonSyntaxException;
import com.google.gson.internal.bind.DateTypeAdapter;
import com.google.gson.stream.JsonReader;

import java.io.Reader;
import java.lang.reflect.Type;
import java.util.Date;

/**
 * OkGo?Json?
 *
 * @author caihan
 * @date 2018/1/18
 * @e-mail 93234929@qq.com
 * 
 */
public class GsonConvertUtils {

    private static Gson create() {
        return GsonConvertUtils.GsonHolder.gson;
    }

    private static class GsonHolder {
        private static Gson gson = new Gson();
    }

    public static <T> T fromJson(String json, Class<T> type) throws JsonIOException, JsonSyntaxException {
        return create().fromJson(json, type);
    }

    public static <T> T fromJson(String json, Type type) {
        return create().fromJson(json, type);
    }

    public static <T> T fromJson(JsonReader reader, Type typeOfT) throws JsonIOException, JsonSyntaxException {
        return create().fromJson(reader, typeOfT);
    }

    public static <T> T fromJson(Reader json, Class<T> classOfT) throws JsonSyntaxException, JsonIOException {
        return create().fromJson(json, classOfT);
    }

    public static <T> T fromJson(Reader json, Type typeOfT) throws JsonIOException, JsonSyntaxException {
        return create().fromJson(json, typeOfT);
    }

    public static String toJson(Object src) {
        return create().toJson(src);
    }

    public static String toJson(Object src, Type typeOfSrc) {
        return create().toJson(src, typeOfSrc);
    }

    public static String formatJson(String json) {
        try {
            JsonParser jp = new JsonParser();
            JsonElement je = jp.parse(json);
            return new GsonBuilder().setPrettyPrinting()
                    .setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
                    .registerTypeAdapter(Date.class, new DateTypeAdapter()).create().toJson(je);
        } catch (Exception e) {
            return json;
        }
    }

    public static String formatJson(Object src) {
        try {
            JsonParser jp = new JsonParser();
            JsonElement je = jp.parse(toJson(src));
            return new GsonBuilder().setPrettyPrinting()
                    .setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
                    .registerTypeAdapter(Date.class, new DateTypeAdapter()).create().toJson(je);
        } catch (Exception e) {
            return e.getMessage();
        }
    }
}