技術標籤：java工具類

1.引入以下兩個工具類

package cn.piesat.common.utils;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;

import java.io.IOException;

/**

 * Long 型別欄位序列化時轉為字串，避免js丟失精度

 *

 */

public class LongJsonSerializer extends JsonSerializer<Long> {

    @Override

    public void serialize(Long value, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException, JsonProcessingException {

        String text = (value == null ? null : String.valueOf(value));

        if (text != null) {

            jsonGenerator.writeString(text);

        }

    }

}
 

package cn.piesat.common.utils;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;

/**

 * 將字串轉為Long

 *

 */

public class LongJsonDeserializer extends JsonDeserializer<Long> {

    private static final Logger logger = LoggerFactory.getLogger(LongJsonDeserializer.class);

  

    @Override

    public Long deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException, JsonProcessingException {

        String value = jsonParser.getText();

        try {

            return value == null ? null : Long.parseLong(value);

        } catch (NumberFormatException e) {

            logger.error("解析長整形錯誤", e);

            return null;

        }

    }

}
 

2.在實體類id欄位上新增@JsonSerialize(using = LongJsonSerializer.class)和@JsonDeserialize(using = LongJsonDeserializer.class)註解

 @Data
@NoArgsConstructor
@AllArgsConstructor
@Builder
public class FileVerifyOpinionDto {

    /** id  解決返回到前端精度缺失*/
    @JsonSerialize(using = LongJsonSerializer.class)
    @JsonDeserialize(using = LongJsonDeserializer.class)
    private Long id;

    /** 檔案 file_base_info id */
    private Long fileId;
}
 

3。

3.頁面返回和資料庫一致