Springboot json time formatting method

Add the following code to application.properties

Springboot uses jackson to parse json by default

 spring.jackson.date-format=yyyy-MM-dd HH:mm:ssssspring.jackson.time-zone=GMT+8

If an individual entity needs to use pattern in other formats, add annotations to the entity

 import org.springframework.format.annotation.DateTimeFormat;import com.fasterxml.jackson.annotation.JsonFormat;public class MrType { @JsonFormat(timezone = "GMT+8",pattern = "yyyy-MM-dd") @DateTimeFormat(pattern="yyyy-MM-dd") private Date createdDate;}

Spring Boot date data format conversion @JsonFormat instance

There is usually Date type data in the pojo bean. The one that is returned directly through @ResponseBody is a long integer timestamp (the number of milliseconds from 1970 to the time of the variable). There are many reasons on the Internet, so I won't go into details here. If you want to return a custom date format, such as: yyyymmddhhmmss, you need to do related processing. There are many processing methods on the Internet, which are generally inherited and rewrite, which is quite complicated. In fact, JSON already has the annotation @JsonFormat support, use examples:

 @JsonFormat(timezone = "GMT+8", pattern = "yyyyMMddHHmmss")private Date createTime;

Function: 1) When entering parameters, the request message only needs to be passed in the yyyymmddhhmmss string, and it will be automatically converted to Date type data. 2) When the parameter is issued, the Date type data is automatically converted into a 14-bit string and returned.

For details, please refer to: http://fasterxml.github.io/jackson-annotations/javadoc/2.0.0/com/fasterxml/jackson/annotation/JsonFormat.html

Other related notes:

1. @JsonIgnoreProperties This annotation is a class annotation. Its function is to ignore some properties in the java bean when serializing json, and both serialization and deserialization are affected. @JsonIgnoreProperties(value = { "word" })
2. @JsonIgnore This annotation is used for properties or methods (preferably properties), and its function is the same as @JsonIgnoreProperties above.
3. @JsonSerialize This annotation is used on properties or getter methods. It is used to embed our custom code during serialization, such as limiting two decimal places after it when serializing a double. @JsonSerialize(using = CustomDoubleSerialize.class)
4. @JsonDeserialize This annotation is used on properties or setter methods. It can be used to embed our custom code during deserialization, similar to @JsonSerialize above @JsonDeserialize(using = CustomDateDeserialize.class)

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