增加对象类转json的公共方法，特殊处理时间格式转换

src/main/java/com/nis/web/service/BaseService.java

@@ -1,11 +1,20 @@
 package com.nis.web.service;
 
+import java.lang.reflect.Type;
+import java.text.SimpleDateFormat;
+import java.util.Date;
 import java.util.List;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import com.google.common.collect.Lists;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonPrimitive;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
 import com.nis.domain.SysRole;
 import com.nis.domain.SysUser;
 import com.nis.util.Configurations;
@@ -209,8 +218,25 @@ public abstract class BaseService {
 	}
 	
 	
+	/**
+	 * 转换成字符串
+	 * @param obj
+	 * @return
+	 */
+	public  static  <T> String gsonToJson(T obj){
+		Gson gson = new GsonBuilder().disableHtmlEscaping().
+				excludeFieldsWithoutExposeAnnotation().
+				registerTypeAdapter(Date.class, new JsonSerializer<Date>() {
+					@Override
+					public JsonElement serialize(Date src, Type type,
+							JsonSerializationContext context) {
+						String format = "yyyy-MM-dd'T'HH:mm:ss.SSS";
+						long time= ((Date) src).getTime()-8*60*60*1000;
+						SimpleDateFormat sdf = new SimpleDateFormat(format);
+						return new JsonPrimitive(sdf.format(time));
+					}
+				}).create();
+		return gson.toJson(obj);
+	}
 	
-	
-	
-
 }