sogrey / javabean2json Goto Github PK

package top.sogrey.java2Json;

import top.sogrey.java2Json.bean.User;

import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.serializer.SerializerFeature;

/**
 * fastjson 版本是 1.2.54
 * 
 * @author Administrator
 * 
 */
public class fastjsonDemo {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		User user = new User();
		user.setUserName("Sogrey");
		String str = JSONObject.toJSONString(user);// fastjson默认转换是不序列化null值对应的key的
		System.out.println(str);
		// 输出结果是：{"age":0,"userName":"Sogrey"}
	}
}

		// 如果需要序列化null对应的key
		str = JSONObject
				.toJSONString(
						user,
						new SerializerFeature[] { SerializerFeature.WriteMapNullValue });
		System.out.println(str);
		// 输出结果是： {"age":0,"job":null,"userName":"Sogrey"}

		// 想字符类型字段如果为null,转换输出为"",而非null ，需要多加一个参数：WriteNullStringAsEmpty
		str = JSONObject.toJSONString(user, new SerializerFeature[] {
				SerializerFeature.WriteMapNullValue,
				SerializerFeature.WriteNullStringAsEmpty });
		System.out.println(str);
		//输出结果是：{"age":0,"job":"","userName":"Sogrey"}

package top.sogrey.java2Json;

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

import top.sogrey.java2Json.bean.User;

public class GsonDemo {

   /**
    * @param args
    */
   public static void main(String[] args) {
   	User user = new User();
   	user.setUserName("Sogrey");
   	Gson g = new GsonBuilder().create();
   	String str = g.toJson(user);
   	System.out.println(str);
   	// {"userName":"Sogrey","age":0}
   }
}

   	g = new GsonBuilder().serializeNulls().create();
   	str = g.toJson(user);
   	System.out.println(str);
   	// {"userName":"Sogrey","age":0,"job":null}