Java front-end how to send parameters of type date to the back-end

First elaborate on the differences between the common types of time.

Date format: year, month, day, hour, minute and second
The date format is: month and year
Date format: hours, minutes and seconds
.TimestampDate format: year, month, day, hour, minute, second, nanosecond (milliseconds)

The front-end passes time-type parameters to the back-end, there are generally two means of passing parameters, GET and POST.

When GET passes a parameter, the front-end passes in a string string, and the back-end uses thestring class (computing)After receiving the type connection, you need to do the relevant processing. The processing code is as follows.

        String str="2021-5-21";  //assume str is the time type parameter passed in the previous paragraph
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
        Date parse = simpleDateFormat.parse(str);
        String format = simpleDateFormat.format(parse);
        System.out.println(parse);   
        System.out.println(format);

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When Post passes a parameter, the front-end passes over an object, the time parameter is just an attribute of the object, the object case is as follows.

public class Student {
    public String getName() {
        return name;
    }

    public Date getDate() {
        return date;
    }

    private String name;
    @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss",timezone = "GMT+8") // Add this annotation above the time attribute
    private Date date;
}

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Backend Receive Request Code

@RestController
@RequestMapping("/test")
public class TestTime {

    @GetMapping("/time1")
    public void service1(String time){

        System.out.println(time);


    }
    @PostMapping("/time2")
    public void service2(@RequestBody Student student){
        System.out.println(student);



    }
}

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Simulates a browser request:

### GET request
GET{{baseUrl}}//test/time2?time=2021-5-8

### POST request
POST{{baseUrl}}//test/time2
Content-Type: application/json

{
  "name": "Gu.",
  "date": "2020-05-08 17:08:10"
}

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Note: baseurl is my ip address, there are many tools to simulate the request, the above is just a tool, readers can use thepostmanetc. tools to simulate the request.

To summarize: get requests are strings that need to be processed
post request is passed to the object, through the @requestbody, and in the field add jsonformat, will be automatically resolved to the date type, do not need to do additional processing.