GsonUtil

package com.credithc.microenterprise.utils;


import com.credithc.microenterprise.utils.adapter.DoubleDefaultAdapter;
import com.credithc.microenterprise.utils.adapter.IntegerDefaultAdapter;
import com.credithc.microenterprise.utils.adapter.StringDefaultAdapter;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

import java.lang.reflect.Type;

public class GsonUtil {
    // 禁掉html转义，否则单引号会变成\u0027，等号变成\u0036，etc.
    private static final Gson deserializer = new GsonBuilder().disableHtmlEscaping().create();

    // Gson默认处理Date对象的序列化/反序列化是通过一个SimpleDateFormat对象来实现的，在不同环境中部署时遇到问题获取到的SimpleDateFormat的模式字符串会不一样
    private static final Gson serializer = new GsonBuilder().disableHtmlEscaping().setDateFormat("yyyy-MM-dd HH:mm:ss").create();

    // 对调用主题返回参数中int,String,Double类型数据特殊处理
    private static final Gson serializerTheme = new GsonBuilder()
            .registerTypeAdapter(Integer.class,new IntegerDefaultAdapter())
            .registerTypeAdapter(String.class,new StringDefaultAdapter())
            .registerTypeAdapter(Double.class,new DoubleDefaultAdapter())
            .disableHtmlEscaping().create();

    private GsonUtil() {
    }

    public static <T> T fromJson(String json, Class<T> clazz) {
        return deserializer.fromJson(json, clazz);
    }

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

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

    public static <T> String toJson(T src) {
        return serializer.toJson(src);
    }

    /*序列化的时候附带默认值*/
    public static <T> String toJsonWithDefault(T src) {
        return serializerTheme.toJson(src);
    }

    
    private static final Gson gson = new GsonBuilder().setDateFormat("yyyy-MM-dd HH:mm:ss").create();
    
    public static <T> T objectFromJson(String json, Class<T> clazz) {
        return gson.fromJson(json, clazz);
    }
}