[英]Spring boot jackson java.time.Duration
I have create a restful web service and i try to send post request the above class 我已经创建了一个宁静的Web服务,并且尝试发送上述课程的发帖请求
public class A {
Duration availTime;
}
public class MyRest {
@RequestMapping(value = "/test", method = RequestMethod.POST)
public Response<?> test(@RequestBody A ta) {
return new ResponseEntity<>(HttpStatus.OK);`
}
}
raw request body 原始请求主体
{
"availTime": {
"seconds": 5400,
"nano": 0,
"units": [
"SECONDS",
"NANOS"
]
}
}
expected json result 预期的json结果
{"availTime": "PT1H30M"}
and i got the above error : Failed to read HTTP message: 我收到了以上错误:无法读取HTTP消息:
org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Unexpected token (START_OBJECT),
expected one of [VALUE_STRING, VALUE_NUMBER_INT, VALUE_NUMBER_FLOAT] for java.time.Duration value; nested exception is
com.fasterxml.jackson.databind.exc.MismatchedInputException: Unexpected token (START_OBJECT), expected one of [VALUE_STRING, VALUE_NUMBER_INT, VALUE_NUMBER_FLOAT] for java.time.Duration value
As exception says java.time.Duration
can be created only from int
, float
or string
but you are providing a Json object. 异常说
java.time.Duration
只能从int
, float
或string
创建,但是您提供的是Json对象。
Define your Duration class as 将您的Duration类定义为
public class Duration {
private long seconds;
private long nano;
private List<String> units;
// setters / getters
}
Now your request will map from class A
现在您的请求将从
A
类映射
Edit 1 编辑1
In case you still want to map to java.time.Duration
, then you need to change your request body. 如果仍然要映射到
java.time.Duration
,则需要更改请求正文。
Case 1 (int) 案例1(int)
Request Body 请求正文
{ "availTime": 5400 } {“ availTime”:5400}
Output 产量
{"availTime":"PT1H30M"} { “availTime”: “PT1H30M”}
Case 2 (float) 案例2(浮动)
Request Body 请求正文
{ "availTime": 5400.00 } {“ availTime”:5400.00}
Output 产量
{"availTime":"PT1H30M"} { “availTime”: “PT1H30M”}
Case 3 (string) 情况3(字串)
Request Body 请求正文
{ "availTime": "PT5400S" } {“ availTime”:“ PT5400S”}
Output 产量
{"availTime":"PT1H30M"} { “availTime”: “PT1H30M”}
For all above three cases to work add dependency 对于上述所有三种情况,添加依赖项
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-jsr310</artifactId>
<version>2.8.8</version>
</dependency>
Class A should be modified as A类应修改为
public class A {
private Duration availTime;
// for json output of duration as string
@JsonFormat(shape = Shape.STRING)
public Duration getAvailTime() {
return availTime;
}
public void setAvailTime(Duration availTime) {
this.availTime = availTime;
}
}
To Print request body as json 将请求正文打印为json
ObjectMapper mapper = new ObjectMapper();
mapper.findAndRegisterModules();
System.out.println(mapper.writeValueAsString(ta));
If you still want to map your existing request body, then you need to write your custom deserializer for Duration class. 如果仍然要映射现有的请求主体,则需要为Duration类编写自定义反序列化器。
Hope it helps. 希望能帮助到你。
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