JSON解析Utils

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

import java.util.List;

/**
 * @Auther zhoutf
 * @Date 2019/1/3 10:10
 * @Description
 */
public class JsonUtils {

    // 定义jackson对象
    private static final ObjectMapper MAPPER = new ObjectMapper();

    /**
     * 将对象转换成json字符串。
     * 
Title: pojoToJson
     * 
Description: 
     * @param data
     * @return
     */
    public static String objectToJson(Object data) {
       try {
            MAPPER.setSerializationInclusion(JsonInclude.Include.NON_NULL);
         String string = MAPPER.writeValueAsString(data);
         return string;
      } catch (JsonProcessingException e) {
         e.printStackTrace();
      }
       return null;
    }

    /**
     * 将对象转换成json字符串。不含空值
     * 
Title: pojoToJson
     * 
Description: 
     * @param data
     * @return
     */
    public static String objectToJsonNoNull(Object data) {
       try {
            MAPPER.setSerializationInclusion(JsonInclude.Include.NON_NULL);
            String string = MAPPER.writeValueAsString(data);
         return string;
      } catch (JsonProcessingException e) {
         e.printStackTrace();
      }
       return null;
    }

    /**
     * 将json结果集转化为对象
     * 
     * @param jsonData json数据
     * @param clazz 对象中的object类型
     * @return
     */
    public static  T jsonToPojo(String jsonData, Class clazz) {
        try {
            T t = MAPPER.readValue(jsonData, clazz);
            return t;
        } catch (Exception e) {
           e.printStackTrace();
        }
        return null;
    }
    
    /**
     * 将json数据转换成pojo对象list
     * 
Title: jsonToList
     * 
Description: 
     * @param jsonData
     * @param beanType
     * @return
     */
    public static List jsonToList(String jsonData, Class beanType) {
       JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List.class, beanType);
       try {
          List list = MAPPER.readValue(jsonData, javaType);
          return list;
      } catch (Exception e) {
         e.printStackTrace();
      }
       
       return null;
    }



}