com.hangum.tadpole.util.JSONUtil.java Source code

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Here is the source code for com.hangum.tadpole.util.JSONUtil.java

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/*******************************************************************************
 * Copyright (c) 2012 Cho Hyun Jong.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Cho Hyun Jong - initial API and implementation
 ******************************************************************************/
package com.hangum.tadpole.util;

import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonElement;
import com.google.gson.JsonParser;

/**
 * json util
 * 
 */
public class JSONUtil {
    /**
     * Logger for this class
     */
    private static final Logger logger = Logger.getLogger(JSONUtil.class);

    /**
     * json normal string to pretty string
     * 
     * @param jsonString
     * @return
     */
    public static String getPretty(String jsonString) {
        if (jsonString == null)
            return "";

        try {
            JsonParser jp = new JsonParser();
            JsonElement je = jp.parse(jsonString);

            Gson gson = new GsonBuilder().setPrettyPrinting().create();
            String strGson = gson.toJson(je);
            System.out.println(StringUtils.trimToEmpty(strGson));

            if (strGson == null || "null".equals(strGson))
                strGson = "";

            return strGson;
        } catch (Exception e) {
            logger.error("pretty json", e);
        }

        return jsonString;

    }
}