字符类型为空的情况返回""

Hos-Framework/src/main/java/com/yihu/ehr/framework/model/Result.java

@@ -1,5 +1,7 @@
package com.yihu.ehr.framework.model;
import java.lang.reflect.Field;
/**
 * Created by chenweida on 2015/12/11.
 * 基础对象
@@ -52,4 +54,19 @@ public class Result {
        re.message = message;
        return re;
    }
    public void checkValue() {
        try {
            Field[] fields = this.getClass().getDeclaredFields();
            for (int j = 0; j < fields.length; j++) {
                fields[j].setAccessible(true);
                if (fields[j].getType().getName().equals(String.class.getTypeName())
                        && fields[j].get(this) == null){
                    fields[j].set(this, "");//设置为空字串
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Hos-resource/src/main/java/com/yihu/ehr/standard/service/standard/StdMetadataService.java

@@ -2,6 +2,7 @@ package com.yihu.ehr.standard.service.standard;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.yihu.ehr.common.ReflectUtil;
import com.yihu.ehr.framework.common.dao.SQLGeneralDAO;
import com.yihu.ehr.framework.constrant.Constants;
import com.yihu.ehr.framework.constrant.ErrorCode;
@@ -19,6 +20,7 @@ import com.yihu.ehr.standard.model.standard.StdDataSetModel;
import com.yihu.ehr.standard.model.standard.StdDictionaryEntryModel;
import com.yihu.ehr.standard.model.standard.StdMetaDataModel;
import com.yihu.ehr.standard.service.bo.StandardVersion;
import jdk.internal.org.objectweb.asm.Type;
import org.hibernate.Query;
import org.hibernate.SQLQuery;
import org.hibernate.Session;
@@ -26,6 +28,7 @@ import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import java.io.IOException;
import java.lang.reflect.Field;
import java.util.*;
/**
@@ -154,6 +157,9 @@ public class StdMetadataService extends SQLGeneralDAO {
                StdMetaDataModel stdMetaDataModel = (StdMetaDataModel) query.uniqueResult();
                stdMetaDataModel.setSuccessFlg(true);
                stdMetaDataModel.setMessage("获取标准数据元成功");
                if (stdMetaDataModel != null) {
                    stdMetaDataModel.checkValue();
                }
                return stdMetaDataModel;
            }
        } catch (Exception e) {