import java.lang.reflect.Type;import org.apache.commons.pool2.impl.GenericObjectPool;import org.apache.commons.pool2.impl.GenericObjectPoolConfig;import com.google.gson.Gson;public class JsonPoolUtils {    private static ThreadLocal
     
       instance = new ThreadLocal
      
       ();    protected static GenericObjectPool
       
         pool;    static {        if (instance.get() == null || pool == null) {            GenericObjectPoolConfig conf = new GenericObjectPoolConfig();            conf.setMaxTotal(32);            conf.setMaxIdle(4);            pool = new GenericObjectPool
        
         (new PooledGsonFactory(), conf);        }    }    public final static 
         
           T fromJson(String json, Type typeOfT) {        if (json == null) {            return null;        }        Gson gson = null;        try {            gson = pool.borrowObject();        } catch (Exception e) {            e.printStackTrace();        }        T t = gson.fromJson(json, typeOfT);        pool.returnObject(gson);        return t;    }    public final static String toJson(Object src) {        if (src == null) {            return null;        }        Gson gson = null;        try {            gson = pool.borrowObject();        } catch (Exception e) {            e.printStackTrace();        }        String string = gson.toJson(src);        pool.returnObject(gson);        return string;    }}
         
        
       
      
     

 

 

import java.sql.Timestamp;import org.apache.commons.pool2.BasePooledObjectFactory;import org.apache.commons.pool2.PooledObject;import org.apache.commons.pool2.impl.DefaultPooledObject;import com.google.gson.Gson;import com.google.gson.GsonBuilder;public class PooledGsonFactory extends BasePooledObjectFactory
     
       {    @Override    public Gson create() throws Exception {        return new GsonBuilder().registerTypeAdapter(Timestamp.class, new TimestampTypeAdapter()).create();    }    @Override    public PooledObject
      
        wrap(Gson obj) {        return new DefaultPooledObject
       
        (obj);    }}