Spring boot @RequestParam unix 时间戳到 LocalDateTime

问题描述

假设我在 RestController 中有一个

Let's say I have in my RestController

@GetMapping("/")
public list(@RequestParam LocalDateTime date) {
}

并且我使用日期请求参数作为 unix 时间戳发出一个 GET 请求，如下所示:

and I make a GET request with date request param as unix timestamp like this:

http://myserver.com/?date=1504036215944

如何让 Spring Boot 和 jackson 自动使用从 unix 时间戳到 LocalDateTime 的正确转换，而无需手动进行转换.

How do I make Spring Boot and jackson to use the correct conversion from unix timestamp to LocalDateTime automatically without manually doing the conversion.

推荐答案

一个解决方案:

@GetMapping("/")
public @ResponseBody String list(TimestampRequestParam date) {
    return date.toString();
}

在 setDate 中实现时间戳到日期转换器

Implementing the time stamp to date converter in setDate

注意 getter &setter 必须有参数名(类成员可以有不同的名字)

pay attention that the getter & setter must have the parameter name ( the class member can have different name )

class TimestampRequestParam {

    private Date date; // member name doesn't need to be like request parameter

    private static final SimpleDateFormat FORMAT = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.S");

    public Timestamp2DateExample() { }

    // must have the same name as the request param
    public Date getDate() {
        return date;
    }

    /**
     * @param timestamp
     * here we convert timestamp to Date, method name must be same as request parameter
     */
    public void setDate(String timestamp) {
        long longParse = Long.parseLong(timestamp);
        this.date = new Date(longParse);
    }

    @Override
    public String toString() {
        return "timestamp2date : " + FORMAT.format(date);
    }

}

输出示例(注意端口，你可能配置不同)

Output example (pay attention to the port, you might configured differently)

$ curl localhost:8080?date=1504036215944

timestamp2date : 2017-08-29 22:50:15.944

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