从Java 5 SE迁移到Java 6 SE后，JAXB的“日期”转换失败 [英] JAXB 'date' conversions fail after moving from Java 5 SE to Java 6 SE

问题描述

我正在尝试将现有应用程序的Java JDK版本从Java 5更改为Java 6（更新38）。该应用程序使用一些JAXB生成的类来编组/解组我们从远程服务器发送/接收的XML。 XML符合模式（.xsd）文件。

I'm trying to change the Java JDK version for an existing application from Java 5 to Java 6 (update 38). The application uses some JAXB generated classes to marshal/unmarshal XML that we send/receive from a remote server. The XML conforms to a schema (.xsd) file.

这一切都在Java 5下运行正常，并在类路径中下载了一堆JAXB二进制文件。我不确定下载的JAXB二进制文件的版本是什么（这个项目已经在我面前了）。如果我只是将JDK版本从Java 5更改为Java 6（更新38），那么我会得到一些以前从未发生过的单元测试失败，例如：

This all used to work fine under Java 5 with a downloaded bundle of JAXB binaries in the classpath. I'm not sure what the version of the downloaded JAXB binaries was (this project was already here before me). If I just change the JDK version from Java 5 to Java 6 (update 38), then I get a few unit test failures that never happened before, such as:

[org.xml.sax.SAXParseException: cvc-datatype-valid.1.2.1: '2012-08-22T00:00:00-04:00' is not a valid value for 'date'.]

我想我可以通过将Java 6 JDK移到头来解决这个问题类路径，所以它在外部JAXB二进制文件之前找到。这产生了编译时错误，例如：

I thought I might be able to solve this by moving the Java 6 JDK to the head of the classpath, so it is found before the external JAXB binaries. That yielded compile-time errors, such as:

The attribute required is undefined for the annotation type XmlElementRef

我的一个JAXB生成的类（基于.xsd文件）报告了此错误。错误是由此注释行引起的：

This error was reported on one of my JAXB-generated classes (based on the .xsd file). The error was caused by this annotation line:

@XmlElementRef(name = "DealCalendarId", type = JAXBElement.class, required = false)

所以，我不确定接下来我需要做什么。我有一些想法：

So, I'm not sure what I need to do next. I have a few ideas:

• 删除下载的JAXB二进制文件，并仅依赖于Java 6 SE中的内置JAXB支持（但我似乎记得前一段时间没有在项目上工作......）


• 用新版本替换下载的JAXB二进制文件


• 替换下载的具有较新版本的JAXB二进制文件并将Java 6 JDK放在类路径中


• 执行上述操作之一并重新生成基于.xsd的所有JAXB类

• Remove the downloaded JAXB binaries and rely only on the built-in JAXB support in Java 6 SE (but I seem to remember this not working on a project some time ago...)
• Replace the downloaded JAXB binaries with a newer version
• Replace the downloaded JAXB binaries with a newer version AND put the Java 6 JDK after them in the classpath
• Do one of the above and also regenerate all my JAXB classes that are based on the .xsd

有什么建议吗？

推荐答案

问题＃1

[org.xml.sax.SAXParseException：cvc-datatype-valid.1.2.1：
'2012-08-22T00：00：00-04：00'不是'date'的有效值。]

[org.xml.sax.SAXParseException: cvc-datatype-valid.1.2.1: '2012-08-22T00:00:00-04:00' is not a valid value for 'date'.]

仅通过此消息 2012-08-22T00：00：00-04：00 不是XML架构的有效值 date type，有效值为 2012-08-22 没有时间信息。您提供的值将对应于 dateTime 类型。您使用的其他版本可能无法执行此验证。

Only going by this message 2012-08-22T00:00:00-04:00 is not a valid value for the XML Schema date type, a valid value would be 2012-08-22 without the time information. The value you presented would correspond to the dateTime type. It is possible that the other version you were using just wan't performing this validation.

问题＃2

注释类型未定义所需的属性
XmlElementRef

The attribute required is undefined for the annotation type XmlElementRef

Java SE 6包含JAXB 2.1，您必须在Java SE 5中使用JAXB 2.2，其中 @XmlElementRef 注释包含 required property。

Java SE 6 contains JAXB 2.1, you must have been using JAXB 2.2 with Java SE 5 where the @XmlElementRef annotation contains the required property.

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