com. fasterxml. jackson. databind. Exc.invalidformatexception problem

Client side usage fastjson serialize , Server use jackson Deserialization failure . Report errors .

Caused by: com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `java.util.Date` from String "2022-04-04 04:04:04": not a valid representation (error: Failed to parse Date value '2022-04-04 04:04:04': Cannot parse date "2022-04-04 04:04:04": while it seems to fit format 'yyyy-MM-dd'T'HH:mm:ss.SSSZ', parsing fails (leniency? null))

reason ：

fastjson The default serialization format ：

public static String           DEFFAULT_DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";

jackson The default supported date inverse sequence format ：

("yyyy-MM-dd'T'HH:mm:ss.SSSZ", "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", "EEE, dd MMM yyyy HH:mm:ss zzz", "yyyy-MM-dd")) 
 jackson The default date inverse sequence does not support yyyy-MM-dd HH:mm:ss This format , So deserialization failed

Solution one ： rewrite jackson Deserialization

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 java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
 
/**
 * @version 1.0.0
 * @description Override deserialization
 * @date 2018/12/25 9:51
 **/
 
public class CustomJsonDateDeserializer extends JsonDeserializer<Date> {
 
    @Override
    public Date deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String date = jp.getText();
        try {
            return format.parse(date);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }
}
In need of date Add comments to attributes ：

   @JsonDeserialize(using = CustomJsonDateDeserializer.class)
    private Date createTime;
    In this way , You need to override the above deserialization abstract class

Solution two ： Use it directly jackson annotation , No need to override deserialization

@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
    private Date createTime;
GMT+8 Time zone , East eight
 

Solution three ： Use it directly fastjson annotation , Do not override deserialization

@JSONField(format = “yyyy-MM-dd HH:mm:ss”)
private Date createTime; 

  Add dependency ：

<!-- fastjson -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.32</version>
        </dependency>
        <!-- jackson-->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.6.4</version>
        </dependency>