Question

我正在使用Spring Boot（最新版本）开发一个项目，我创建了1个webservice，其终点是 - / transaction 。在通过POST调用/ transaction服务时，我得到如下例外 -

WARN 7864 --- [nio-8080-exec-1] .w.s.m.s.DefaultHandlerExceptionResolver : Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Can not construct instance of java.time.Instant: no long/Long-argument constructor/factory method to deserialize from Number value (1478192204000); nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not construct instance of java.time.Instant: no long/Long-argument constructor/factory method to deserialize from Number value (1478192204000)
 at [Source: java.io.PushbackInputStream@75d6c7; line: 4, column: 15] (through reference chain: com.demo.statsservice.statsservice.models.Transaction["timestamp"])

以下是我的班级交易 -

import java.time.Instant;

public class Transaction {
    private double amount;

    private Instant timestamp;

    public Transaction() {}

    public Transaction(double amount, Instant timestamp) {
        this.amount = amount;
        this.timestamp = timestamp;
    }

    public double getAmount() {
        return amount;
    }

    public void setAmount(double amount) {
        this.amount = amount;
    }

    public Instant getTimestamp() {
        return timestamp;
    }

    public void setTimestamp(Instant timestamp) {
        this.timestamp = timestamp;
    }

    @Override
    public String toString() {
        // TODO Auto-generated method stub
        return super.toString();
    }
}

我正在使用java 8的Instant类来获取时间戳。用户将收到POST请求 -

{
    "amount" : 12.3,
    "timestamp": 1478192204000
}

金额和时间戳的数据类型分别为double和long。我使用了Instant类，因为我使用Java 8的Duration类进行了大量的操作。

如何解决此问题？

使用Instant进行时间戳时JSON解析错误

0 个答案: