org.voovan.tools.json.JSONEncode Maven / Gradle / Ivy

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Voovan is a java framwork and it not depends on any third-party framework.
There is a newer version: 4.3.8
package org.voovan.tools.json;

import org.voovan.Global;
import org.voovan.tools.TDateTime;
import org.voovan.tools.TEnv;
import org.voovan.tools.TString;
import org.voovan.tools.collection.IntKeyMap;
import org.voovan.tools.collection.LongKeyMap;
import org.voovan.tools.hashwheeltimer.HashWheelTask;
import org.voovan.tools.reflect.TReflect;
import org.voovan.tools.security.THash;

import java.lang.reflect.Array;
import java.math.BigDecimal;
import java.util.*;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;

/**
 * JSON打包类
 *
 * @author helyho
 * 
 * Voovan Framework.
 * WebSite: https://github.com/helyho/Voovan
 * Licence: Apache v2 License
 */
public class JSONEncode {
    public final static boolean JSON_HASH_ENABLE = TEnv.getSystemProperty("JsonHashEnable", false);
    public final static LongKeyMap JSON_ENCODE_CACHE = new LongKeyMap(1024);

    static {
        if(JSON_HASH_ENABLE) {
            Global.getHashWheelTimer().addTask(new HashWheelTask() {
                @Override
                public void run() {
                    JSON_ENCODE_CACHE.clear();
                }
            }, 1);
        }
    }

    /**
     * 分析自定义对象为JSON字符串
     *
     * @param object 自定义对象
     * @return JSON字符串
     * @throws ReflectiveOperationException
     */
    private static String complexObject(Object object, boolean allField) throws ReflectiveOperationException {
        return mapObject(TReflect.getMapfromObject(object, allField), allField);
    }

    /**
     * 分析Map对象为JSON字符串
     *
     * @param mapObject map对象b
     * @return JSON字符串
     * @throws ReflectiveOperationException
     */
    private static String mapObject(Map mapObject, boolean allField) throws ReflectiveOperationException {
        StringBuilder contentStringBuilder = new StringBuilder(Global.STR_LC_BRACES);

        for (Object mapkey : mapObject.keySet()) {
            String key = fromObject(mapkey, allField);
            String Value = fromObject(mapObject.get(mapkey), allField);
            String wrapQuote = key.startsWith(Global.STR_QUOTE) && key.endsWith(Global.STR_QUOTE) ? Global.EMPTY_STRING : Global.STR_QUOTE;
            contentStringBuilder.append(wrapQuote);
            contentStringBuilder.append(key);
            contentStringBuilder.append(wrapQuote);
            contentStringBuilder.append(Global.STR_COLON);
            contentStringBuilder.append(Value);
            contentStringBuilder.append(Global.STR_COMMA);
        }

        if (contentStringBuilder.length()>1){
            contentStringBuilder.setLength(contentStringBuilder.length() - 1);
        }

        contentStringBuilder.append(Global.STR_RC_BRACES);

        return contentStringBuilder.toString();
    }

    /**
     * 分析Array对象为JSON字符串
     *
     * @param arrayObject Array对象
     * @throws ReflectiveOperationException
     * @return JSON字符串
     */
    private static String arrayObject(Object[] arrayObject, boolean allField) throws ReflectiveOperationException {
        StringBuilder contentStringBuilder = new StringBuilder(Global.STR_LS_BRACES);

        for (Object object : arrayObject) {
            String Value = fromObject(object, allField);
            contentStringBuilder.append(Value);
            contentStringBuilder.append(Global.STR_COMMA);
        }

        if (contentStringBuilder.length()>1){
            contentStringBuilder.setLength(contentStringBuilder.length() - 1);
        }

        contentStringBuilder.append(Global.STR_RS_BRACES);
        return contentStringBuilder.toString();
    }

    /**
     * 分析Collection对象为JSON字符串
     *
     * @param collectionObject Collection 对象
     * @throws ReflectiveOperationException
     * @return JSON字符串
     */
    private static String CollectionObject(Collection collectionObject, boolean allField) throws ReflectiveOperationException {
        StringBuilder contentStringBuilder = new StringBuilder(Global.STR_LS_BRACES);

        for (Object object : collectionObject) {
            String Value = fromObject(object, allField);
            contentStringBuilder.append(Value);
            contentStringBuilder.append(Global.STR_COMMA);
        }

        if (contentStringBuilder.length()>1){
            contentStringBuilder.setLength(contentStringBuilder.length() - 1);
        }

        contentStringBuilder.append(Global.STR_RS_BRACES);
        return contentStringBuilder.toString();
    }

    /**
     * 将对象转换成JSON字符串
     *
     * @param object 要转换的对象
     * @return 类型:String 		对象对应的JSON字符串
     * @throws ReflectiveOperationException 反射异常
     */
    @SuppressWarnings("unchecked")
    public static String fromObject(Object object) throws ReflectiveOperationException {
        return fromObject(object, false);
    }

    /**
     * 将对象转换成JSON字符串
     *
     * @param object 要转换的对象
     * @param allField 是否处理所有属性
     * @return 类型:String 		对象对应的JSON字符串
     * @throws ReflectiveOperationException 反射异常
     */
    @SuppressWarnings("unchecked")
    public static String fromObject(Object object, boolean allField) throws ReflectiveOperationException {
        String value = null;

        if(object == null) {
            return "null";
        }

        Long jsonHash = null;
        if(JSON_HASH_ENABLE) {
            jsonHash = ((long)(object.getClass().hashCode() + (allField?1:0))) << 32 + object.hashCode();
            value = JSON_ENCODE_CACHE.get(jsonHash);

            if (value != null) {
                return value;
            }
        }

        Class clazz = object.getClass();

        if (object instanceof Class) {
            return "\"" + ((Class)object).getCanonicalName() + "\"";
        } else if (object instanceof BigDecimal) {
            value = ((BigDecimal) object).stripTrailingZeros().toPlainString();
        } else if (object instanceof Date) {
            value = "\"" + TDateTime.format(((Date)object), TDateTime.STANDER_DATETIME_TEMPLATE)+ "\"";;
        } else if (object instanceof Map) {
            Map mapObject = (Map) object;
            value = mapObject(mapObject, allField);
        } else if (object instanceof Collection) {
            Collection