解析 JSON 日期

Question

我使用Grails作为服务器，ExtJS作为客户端。现在我需要使用来自 JSON 的特定日期值更新域的日期字段。但是当我想使用特定日期进行更新时，错误是这样的

无法将带有类 'java.lang.String' 的对象 'dd MM， yyyy' 强制转换为类 'java.util.Date'

现在如何将特定日期从 JSON 更新到数据库？这是我的服务器更新操作：

def update(json) {
    def count = 0
    def flag = true
    def installments = []
    def pdate = json.payDate
    def payDate = pdate.format("dd MM, yyyy")
    def newCashPay = Double.parseDouble("${json.cashPay}")
    def newReturnAmount = Double.parseDouble("${json.returnAmount}")
    if(json instanceof JSONObject){            
        def c = Installment.get(Integer.parseInt("${json.id}"))
        if(c){   
            c.activeFlag = true
            c.cashPay = newCashPay
            c.returnAmount = newReturnAmount
            c.payDate = payDate
            if(c.validate()){
                c.save()
            }else{                        
                c.errors.each {
                    println it
                }
            }
        }

        def installment = [id:c.id, accNo:c.accNo, memberNo:c.memberNo, branchId:c.branchId, installmentNo:c.installmentNo, weekStart:c.weekStart, weekEnd:c.weekEnd, payDate:c.payDate, payAmount:c.payAmount, lateFee:c.lateFee, cashPay:c.cashPay, returnAmount:c.returnAmount, activeFlag:c.activeFlag]
        installments << installment
        flag = flag && true
        count++
    }
}

Answer 1

而不是

def payDate = pdate.format("dd MM, yyyy")

你不是说

def payDate = Date.parse( "dd MM, yyyy", pdate )