jackson反序列化失败InvalidFormatException: Can not deserialize value of type java.util.Date

灰太狼 2022-04-02 04:22 522阅读 0赞

### 问题： ###

客户端使用fastjson进行序列化，服务端使用jackson反序列化失败。报错。

Caused by: com.fasterxml.jackson.databind.exc.InvalidFormatException: Can not deserialize value of type java.util.Date from String "2018-12-25 10:07:49": not a valid representation (error: Failed to parse Date value '2018-12-25 10:07:49': Can not parse date "2018-12-25 10:07:49Z": while it seems to fit format 'yyyy-MM-dd'T'HH:mm:ss.SSS'Z'', parsing fails (leniency? null))
     at [Source: {"acctBal":9797.11,"acctDate":"22222","acctName":"22222","acctNo":"xxxxxxxxxxxx","cretDebtFlag":"22222","currencyCode":"22222","insSeq":"22222","merId":"22222","merName":"22222","othAcctName":"22222","othAcctNo":"22222","othBankNo":"22222","remark":"22222","reqReserved":"22222","reserved":"22222","rtnReason":"22222","successtime":"2018-12-25 10:07:49","txnAmt":753375.33,"txnDate":"22222","txnNo":"22222","txnType":"22222"}; line: 1, column: 333] (through reference chain: com.baofoo.cgwfi.ws.wsdto.account.DownloadFileLzDetailDTO["successtime"])
    	at com.fasterxml.jackson.databind.exc.InvalidFormatException.from(InvalidFormatException.java:74)
    	at com.fasterxml.jackson.databind.DeserializationContext.weirdStringException(DeserializationContext.java:1410)
    	at com.fasterxml.jackson.databind.DeserializationContext.handleWeirdStringValue(DeserializationContext.java:926)
    	at com.fasterxml.jackson.databind.deser.std.StdDeserializer._parseDate(StdDeserializer.java:819)
    	at com.fasterxml.jackson.databind.deser.std.StdDeserializer._parseDate(StdDeserializer.java:788)
    	at com.fasterxml.jackson.databind.deser.std.DateDeserializers$DateBasedDeserializer._parseDate(DateDeserializers.java:172)
    	at com.fasterxml.jackson.databind.deser.std.DateDeserializers$DateDeserializer.deserialize(DateDeserializers.java:259)
    	at com.fasterxml.jackson.databind.deser.std.DateDeserializers$DateDeserializer.deserialize(DateDeserializers.java:242)
    	at com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:504)
    	at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:104)
    	at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:276)
    	at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:140)
    	at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3798)
    	at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2842)
    	at com.baofoo.util.json.JsonCodingUtil.decode(JsonCodingUtil.java:45)
    	... 68 more

### 原因 ###

**fastjson默认使用的序列化格式：**

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

**jackson默认支持的日期反序列格式：**

("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默认的日期反序列化不支持yyyy-MM-dd HH:mm:ss 这种格式，所以反序列化失败  
**解决办法一：重写jackson反序列化**

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 重写反序列化
     * @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);
            }
        }
    }

在需要的date属性上添加注解：

@JsonDeserialize(using = CustomJsonDateDeserializer.class)
        private Date txnTime;
        使用这种方式，需要重写上面反序列化抽象类

**解决办法二：直接使用jackson注解，不需要重写反序列化**

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

*GMT+8表示时区，东八区*

**解决办法三：直接使用fastjson注解，不要重写反序列化**  
@JSONField(format = “yyyy-MM-dd HH:mm:ss”)  
private Date txnTime;

添加依赖：

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