springboot LocalDateTime 反序列化

柔情只为你懂 2023-02-27 05:58 15阅读 0赞

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### springboot LocalDateTime 反序列化 ###

**@RequestBody读取pojo中LocalDateTime属性字段，字符串格式为"yyyy-MM-dd HH:mm:ss"时反序列化失败**

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**示例**

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**pojo 层**

**Order**

@Data
    public class Order {
    
        private String orderId;
    
        @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
        private LocalDateTime orderTime;
    
        private Double price;
        private Integer amount;
    }

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**controller 层**

**HelloController**

@RestController
    public class HelloController {
    
        @RequestMapping("/hello")
        public String hello(@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") LocalDateTime localDateTime){
            System.out.println("hello ==> "+localDateTime);
    
            return "success";
        }
    
        @RequestMapping("/hello2")
        public String hello2(Order order){
            System.out.println("hello2 ==> "+order);
    
            return "success";
        }
    
        @RequestMapping("/hello3")
        public String hello3(@RequestBody Order order){
            System.out.println("hello3 ==> "+order);
    
            return "success";
        }
    }

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**使用测试**

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**@RequestParam**

**localhost:8080/hello?localDateTime=2020-08-09 08:06:09**

hello ==> 2020-08-09T08:06:09

**localhost:8080/hello2?orderId=1&orderTime=2020-08-06 08:06:09&price=2&amount=8**

hello2 ==> Order(orderId=1, orderTime=2020-08-06T08:06:09, price=2.0, amount=8)

**@RequestParam可正常操作LocalDateTime数据**

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**@RequestBody**

**localhost:8080/hello3**

**header：** **Content-Type ==> application/json**

**body：**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzkzMTYyNQ_size_16_color_FFFFFF_t_70][]

**控制台输出**

2020-07-16 17:33:54.416  WARN 10404 --- [nio-8080-exec-5] 
    .w.s.m.s.DefaultHandlerExceptionResolver : Resolved 
    [org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: 
    Cannot deserialize value of type `java.time.LocalDateTime` from String "2020-08-09 
    08:06:09": Failed to deserialize java.time.LocalDateTime: 
    (java.time.format.DateTimeParseException) Text '2020-08-09 08:06:09' could not be parsed at 
    index 10; nested exception is com.fasterxml.jackson.databind.exc.InvalidFormatException: 
    Cannot deserialize value of type `java.time.LocalDateTime` from String "2020-08-09 
    08:06:09": Failed to deserialize java.time.LocalDateTime: 
    (java.time.format.DateTimeParseException) Text '2020-08-09 08:06:09' could not be parsed at 
    index 10
     at [Source: (PushbackInputStream); line: 3, column: 18] (through reference chain: 
    com.example.demo.pojo.Order["orderTime"])]

**localDateTime反序列化失败，不能将2020-08-09 08:06:09转换为localDateTime**

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**解决措施**

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**引入jar 包**

<dependency>
                <groupId>com.fasterxml.jackson.datatype</groupId>
                <artifactId>jackson-datatype-jsr310</artifactId>
                <version>2.11.1</version>
            </dependency>

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**pojo 层**

**Order**

@Data
    public class Order {
    
        private String orderId;
    
        @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
        @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
        private LocalDateTime orderTime;
    
        private Double price;
        private Integer amount;
    }

**使用@JsonFormat读取输入参数进行序列化**

## ##

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**使用测试**

**localhost:8080/hello3**

**header：** **Content-Type ==> application/json**

**body：**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzkzMTYyNQ_size_16_color_FFFFFF_t_70 1][]

**控制台输出**

hello3 ==> Order(orderId=2, orderTime=2020-08-09T08:06:09, price=2.0, amount=8)

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzkzMTYyNQ_size_16_color_FFFFFF_t_70]: /images/20230209/1ff2f40195714ad6b2586c5bbb781118.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzkzMTYyNQ_size_16_color_FFFFFF_t_70 1]: /images/20230209/595743f7afaa4fe88bc329d8fa40ba96.png