The understanding of SPRINGMVC

Are the personal understanding of SPRINGMVC;

@DateTimeFormat (pattern= "Yyyy-mm-dd HH:mm:ss")
@JsonFormat (pattern= "Yyyy-mm-dd HH:mm:ss", timezone = "gmt+8")

1 parsing/formatting of the field level

Add @DateTimeFormat (pattern= "Yyyy-mm-dd HH:mm:ss") to the attribute or get method of the entity class.

The date string in the form is correctly converted to the date type. There are also @numberformat annotations,

Detailed

@Number: Define number-related parsing/formatting metadata (common style, currency style, percent style) with the following parameters:

Style: Used to specify style type, including three kinds: Style.number (Universal Style) style.currency (currency style) Style.percent (Percent style), default style.number;

Pattern: Custom style, such as patter= "#,###";

@DateTimeFormat: Define date-related parsing/formatting metadata with the following parameters:

Pattern: Specifies a pattern for parsing/formatting field data, such as "Yyyy-mm-dd HH:mm:ss"

ISO: Specifies the ISO mode for parsing/formatting field data,

Includes four types: Iso.none (not used)

Iso. DATE (YYYY-MM-DD)

Iso. Time (HH:MM:SS. SSSZ)

Iso. Date_time (Yyyy-mm-dd hh:mm:ss. SSSZ),

Default Iso.none;

2

@JsonFormat annotation, after it is configured on the Get method of the date type,

Jackson will convert the date type in the configured format without customizing the converter class

3

Spring can return objects, and the object is converted to JSON data in a format returned;

Of course you can also use Response.getwriter (). Write to return the format of the JSON data.

Three Jackson bags: Jackson-core.jar, jackson-databind.jar,j Ackson-annotations.jar