Field error in object ‘tbPet‘ on field ‘birthday‘: rejected value [2020-07-30]； codes [typeMismatch.

野性酷女 2022-11-25 13:02 143阅读 0赞

运行：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0NzM5NzA2_size_16_color_FFFFFF_t_70]  
![在这里插入图片描述][20200809094126364.png]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0NzM5NzA2_size_16_color_FFFFFF_t_70 1]

完整的报错信息是：  
Field error in object ‘tbPet’ on field ‘birthday’: rejected value \[2020-07-30\]; codes \[typeMismatch.tbPet.birthday,typeMismatch.birthday,typeMismatch.java.util.Date,typeMismatch\]; arguments \[org.springframework.context.support.DefaultMessageSourceResolvable: codes \[tbPet.birthday,birthday\]; arguments \[\]; default message \[birthday\]\]; default message \[Failed to convert property value of type ‘java.lang.String’ to required type ‘java.util.Date’ for property ‘birthday’; nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type \[java.lang.String\] to type \[java.util.Date\] for value ‘2020-07-30’; nested exception is java.lang.IllegalArgumentException\]\]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0NzM5NzA2_size_16_color_FFFFFF_t_70 2]  
当我在jsp页面接收date信息，回到controller输出的时候出错了，这是说白了是java.lang.String和java.util.Date之间的问题

解决方法共两步：  
1、首先需要在maven文件引入joda-time依赖

<dependency>
          <groupId>com.fasterxml.jackson.core</groupId>
          <artifactId>jackson-databind</artifactId>
          <version>2.11.2</version>
        </dependency>
     
            <dependency>
                <groupId>joda-time</groupId>
                <artifactId>joda-time</artifactId>
                <version>2.3</version>
            </dependency>

2、在实体类添加时间的注解  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0NzM5NzA2_size_16_color_FFFFFF_t_70 3]

@DateTimeFormat(pattern = "yyyy-MM-dd")
     @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss",timezone="GMT+8")

再运行测试输出成功：  
![在这里插入图片描述][20200809094202377.png]

public String getCreation_time() { 
    
            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
            return simpleDateFormat.format(creation_time);
        }

还有好多方法可以解决这个问题的，若是你有更好的方法也可以在下方留言告诉我

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[20200809094126364.png]: /images/20221124/c7a4c1b0e58f448591e52328955f5144.png
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0NzM5NzA2_size_16_color_FFFFFF_t_70 2]: /images/20221124/208a0951ffd64343af92944ea1e3aa7c.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0NzM5NzA2_size_16_color_FFFFFF_t_70 3]: /images/20221124/3fdae72f34624347bee9932cd833c32b.png
[20200809094202377.png]: /images/20221124/4b4df4f6e0484caf8237f8ec397398a9.png