使用 LocalDate 类型参数发送请求

Question

我想发送这样的请求：

http://localhost:8080/reports/daily?start_date=2018-03-22&end_date=2018-03-24

我有一个错误：

"2018-05-31 15:40:29.623 WARN 11496 --- [nio-8080-exec-5] .w.s.m.s.DefaultHandlerExceptionResolver : Failed to bind request element: org.springframework.web.method.annotation.MethodArgumentTypeMismatchException: Failed to convert value of type 'java.lang.String' to required type 'java.time.LocalDate'; nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [@org.springframework.web.bind.annotation.RequestParam @org.springframework.format.annotation.DateTimeFormat java.time.LocalDate] for value '2018-03-22'; nested exception is java.lang.IllegalArgumentException: Parse attempt failed for value [2018-03-22] "

问题很明显，所以我找到了解决方案并更改了所有内容。我的方法：

@RequestMapping(path = "reports/daily", method = RequestMethod.GET, 
                consumes = MediaType.APPLICATION_JSON_VALUE)
public String getDailyReport(@RequestParam ("start_date") 
                             @DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME) 
                             LocalDate startDate, 
                             @RequestParam("end_date") 
                             @DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME) 
                             LocalDate endDate) {
    double totalDistance = 0.0;
    double totalPrice = 0.0;
    List<Transit> transits = transitService.getTransits(startDate, endDate);
    for (Transit transit : transits) {
        if (transit.getDistance() != null && transit.getPrice() != null) {
            try {
                totalDistance = totalDistance + transit.getDistance();
                totalPrice = totalPrice + transit.getPrice();
            } catch (NullPointerException e) {
                e.fillInStackTrace().getMessage();
            }
        }
    }
    return "Total distance " + totalDistance + ", total price: " + totalPrice;
}

对我来说一切似乎都很好，我还在 pom 文件中添加了所需的依赖项。

Answer 1

我怀疑问题出在这里：

@DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME)

根据 the docs DATE_TIME 是日期和时间：

The most common ISO DateTime Format yyyy-MM-dd'T'HH:mm:ss.SSSZ, e.g. "2000-10-31T01:30:00.000-05:00".

你的 2018-03-22 参数看起来不是这样的。而是使用

@DateTimeFormat(iso = DateTimeFormat.ISO.DATE)

The most common ISO Date Format yyyy-MM-dd, e.g. "2000-10-31".

start_date 和 end_date 相同。

使用 LocalDate 类型参数发送请求

Sending requests with LocalDate type parameters

java

spring

date

spring-boot

localdate