Spring Boot (29) - type converter using

Mainly used in type conversion date, came a front-end date, and how the back-end to receive it?

Let's look at a simple example:

Defining an interface, the method receives a parameter of type Date:

@RestController
public class UserController {
    @GetMapping("/hello")
    public void hello(Date date){
        System.out.println(date);
    }
}

Passing a value of type date when the front access:

you can see, the date type conversion request failed because of an exception, since we can define a date type converter to solve this problem:

import org.springframework.core.convert.converter.Converter;
import org.springframework.stereotype.Component;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

@Component
public class DateConvert implements Converter<String, Date> {
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    @Override
    public Date convert(String source) {
        if(source != null && !"".equals(source)){
            try {
                Date date = sdf.parse(source);
                return date;
            } catch (ParseException e) {
                e.printStackTrace();
            }
        }
        return null;
    }
}

Visit again, OK!