ubuntu - 在 ubuntu 14.04 服务器下，双数乘法在 Grails 中不起作用

Question

我在 Grails 2.2.1 中乘以双数并将其保存为 string .它在本地环境下工作正常(windows 7，jdk 7，tomcat7)但在ubuntu server下不工作(14.04，tomcat7，jdk7)。我无法找出其背后的根本原因。

这里是 error log

public java.lang.Number java.lang.Number#multiply(java.lang.Number).Stacktrace follows:

org.codehaus.groovy.runtime.metaclass.MethodSelectionException: Could not find which method multiply() to invoke from this list:

  public java.lang.Number java.lang.Number#multiply(java.lang.Character)
  public java.lang.Number java.lang.Number#multiply(java.lang.Number)

    at sagoon.ProductsController.addDiamondProduct(ProductsController.groovy:232)

    at grails.plugin.cache.web.filter.PageFragmentCachingFilter.doFilter(PageFragmentCachingFilter.java:195)

    at grails.plugin.cache.web.filter.AbstractFilter.doFilter(AbstractFilter.java:63)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

    at java.lang.Thread.run(Thread.java:745)

code 摘录

 def today = new Date().clearTime()
    def todayGoldPrice = GoldRates.findAllByGoldDate(today)
    def category = Categories.get(params.category)
    def karigad = Karigads.get(params.karigad)

    Double totalDiamondAmount = params.diamondWeight.toDouble() * params.diamondRate.toDouble()

    Double totalGoldAmount = params.goldWeight.toDouble() * ( params.goldPercent.toDouble()/100 )  * todayGoldPrice.rate

    Double totalMc = params.goldWeight.toDouble() * params.mcPerGram.toDouble()

    Double totalStoneAmount = params.stoneWeight.toDouble() * params.stonePricePerCarat.toDouble()

    Double totalPurchasePrice = totalDiamondAmount.toDouble() + totalGoldAmount.toDouble() + totalStoneAmount.toDouble() + totalMc.toDouble()

ProductsController.addDiamondProduct

 def addDiamondProduct(){

    def today = new Date().clearTime()
    def todayGoldPrice = GoldRates.findAllByGoldDate(today)
    def category = Categories.get(params.category)
    def karigad = Karigads.get(params.karigad)

    Double totalDiamondAmount = params.diamondWeight.toDouble() * params.diamondRate.toDouble()
    Double totalGoldAmount = params.goldWeight.toDouble() * ( params.goldPercent.toDouble()/100 )  * todayGoldPrice.rate
    Double totalMc = params.goldWeight.toDouble() * params.mcPerGram.toDouble()
    Double totalStoneAmount = params.stoneWeight.toDouble() * params.stonePricePerCarat.toDouble()
    Double totalPurchasePrice = totalDiamondAmount.toDouble() + totalGoldAmount.toDouble() + totalStoneAmount.toDouble() + totalMc.toDouble()

    def product = new DiamondProducts(
            productCode: params.productCode,
            diamondWeight: params.diamondWeight,
            diamondRate: params.diamondRate,
            totalDiamondAmount: totalDiamondAmount.toString(),
            goldWeight: params.goldWeight,
            goldKt: params.goldPurity,
            goldPercent: params.goldPercent,
            totalGoldAmount: totalGoldAmount.toString(),
            mcGram: params.mcPerGram,
            totalMc: totalMc.toString(),
            stoneWeight: params.stoneWeight,
            stonePricePerCarat: params.stonePricePerCarat,
            totalStoneAmount: totalStoneAmount.toString(),
            totalPurchasePrice: totalPurchasePrice.toString(),
            salePrice: params.salePrice,
            remarks: params.remarks,
            description: params.description,
            itemNumber: params.itemNumber,
            karigad: karigad,
            category: category,
            status: "notSold",
            createdDate: new Date()
    )
    product.save()

    flash.message = "Product Added Successfully."
    redirect(action: 'diamondProducts')

}

我在这里做错了什么？

Answer 1

由于工作环境不同，我不认为它会给你这个错误。我已经在 Ubuntu 14.04 上进行了测试。环境，它工作得很好。

您可以在 error log 中查看那个，在run-time groovy 引擎与 multiply 混淆了方法。它无法选择任何一种方法，因为有两个选项可用，这就是它给出 MethodSelectionException 的原因.

public java.lang.Number java.lang.Number#multiply(java.lang.Character)
public java.lang.Number java.lang.Number#multiply(java.lang.Number)

另请查看code 中的以下行您添加的片段

def todayGoldPrice = GoldRates.findAllByGoldDate(today)
.
.
.
Double totalGoldAmount = params.goldWeight.toDouble() * ( params.goldPercent.toDouble()/100 )  * todayGoldPrice.rate

在您所做的第一行中 findAllByGoldDate查询Domain class GoldRates .findAllByGoldDate将返回匹配查询条件的对象列表。

在您进行乘法的另一行中，查看您访问 rate 的方式。来自 todayGoldPrice 的字段包含对象列表的集合。我建议您替换 findAllBy与 findBy如果您想访问 rate字段直接喜欢 todayGoldPrice.rate您在代码中所做的。

请查看它，如果可能的话，在两个环境中使用相同的数据库转储。