FastJsonHelper工具类 -Json和实体类的转换

package cn.com.hwqh.util;

import cn.com.hwqh.entity.UserApiVo;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.serializer.SerializerFeature;

import javax.print.DocFlavor;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @author Acmen_z
 */
public class FastJsonHelper {
     
		//实体转json
    public static String jsonEncode(Object obj) {
     
        return JSON.toJSONString(obj,
                SerializerFeature.DisableCircularReferenceDetect,
                SerializerFeature.WriteNullStringAsEmpty,
                SerializerFeature.WriteNullListAsEmpty,
                SerializerFeature.WriteNullBooleanAsFalse,
                SerializerFeature.WriteMapNullValue);
    }
	//json转实体
    public static <T> T jsonDecode(String json, Class<T> clazz) {
     
        return (T) JSON.parseObject(json, clazz);
    }

    public static JSONObject toJSONObject(String jsonString) {
     
        JSONObject json = null;
        try {
     
            json = JSON.parseObject(jsonString);
        } catch (Exception e) {
     
        }
        return json;
    }

    public static <T> List<T> parseArray(String json, Class<T> clazz) {
     
        try {
     
            return JSONObject.parseArray(json, clazz);
        } catch (Exception e) {
     
            e.printStackTrace();
        }
        return null;
    }

    @SuppressWarnings("unchecked")
    public static Map<String, Object> toMap(String jsonString) {
     
        Map<String, Object> map = JSON.parseObject(jsonString, Map.class);
        return map;
    }

    @SuppressWarnings("unchecked")
    public static <T> T mapToBean(Map<String, String> map, Class<T> clazz) {
     
        try {
     
            JSON.toJavaObject((JSON) JSON.toJSON(map), clazz);
        } catch (Exception e) {
     
            e.printStackTrace();
        }
        return null;
    }
	
    public static void main(String[] args) {
     
        Map<String, Object> json = new HashMap<String, Object>();
        json.put("test", null);
        String s = "";
        UserApiVo userApiVo = FastJsonHelper.jsonDecode(s, UserApiVo.class);

        System.out.println(jsonEncode(json));
    }

}