对象与JSON之间的互转

import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * 对象与JSON之间的互转

 */
public class JsonUtils {

	//转换JSOn的对象
	private static ObjectMapper om = new ObjectMapper();
	
	static{
		om.setSerializationInclusion(Include.NON_NULL);
	}
	
	//对象转JSON格式字符串
	public static String getObjectToJson(Object obj){
		try {
			return om.writeValueAsString(obj);
		} catch (JsonProcessingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}
	//JSON格式的字符串转成对象
	public static <T> T getJsonToObject(String json, Class<T> beanType){
		T t = null;
		try {
			t = om.readValue(json, beanType);
		} catch (Exception e) {
			// TODO: handle exception
		}
		return t;
	}
}