Java11，MalformedByteSequenceException应该替换成什么？

Question

我正在将项目移动到 Java11

我已经把sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl改成了java.lang.reflect.ParameterizedType（按照指定的here），现在轮到MalformedByteSequenceException:

warning: MalformedByteSequenceException is internal proprietary API and may be removed in a future release import com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException;

它被用于从 XML 文件创建对象的代码片段中。更准确地说是 try-catch.

    try {
        ...
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        DocumentBuilder builder = factory.newDocumentBuilder();
        Document document = builder.parse(stream);

        NodeList list = document.getChildNodes();

        fillProcessStack(document);
        ...
        list = list.item(0).getChildNodes();
        createItems(list, parent);

    } catch (MalformedByteSequenceException e) {
        //"Any char in your xml file has a wrong format: " + e.getLocalizedMessage()
    } catch (SAXParseException sax) {
        ...
    } catch (Exception e) {
        ...
    }

反正我在网上找不到任何关于这个的东西。

我能想到的最接近的是 UnsupportedEncodingException，但我不确定。

此外，这可能是从网上复制的一些旧代码的遗留物，显然如果我删除它，编译器看起来一切都很好。

那么，关于Java11有什么general/good建议吗？

编辑：对于想结束这个问题的人，因为

Questions seeking debugging help ("why isn't this code working?") must include the desired behavior, a specific problem or error and the shortest code necessary to reproduce it in the question itself. Questions without a clear problem statement are not useful to other readers. See: How to create a Minimal, Reproducible Example.

我会尽量解释得更清楚。

这里没有调试帮助，在Java11中有些包没有导出到public，比如sun.*，它们不应该正常使用（除非特定条件）。代码在 jdk8 下工作正常，但在 ojdk11 下它会抱怨，所以我可以使用一些变通方法使它们在运行时无论如何都可见，或者使其正确并摆脱它们。后者是我正在尝试做的。鉴于我在网上找不到任何东西，我在这里问。

Answer 1

MalformedByteSequenceException 扩展了 CharConversionException，它扩展了 IOException，parse 方法强制你抓住它。所以在捕获IOException或CharConversionException时，如果直接抛出也会捕获MalformedByteSequenceException。

然而，XML 解析器在 JDK11 中似乎发生了行为变化。当我尝试时，例如

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(new ByteArrayInputStream(new byte[] { 1, 2, 3, -5 }));

我明白了

Exception in thread "main" org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Invalid byte 1 of 1-byte UTF-8 sequence.
        at java.xml/com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:262)
        at java.xml/com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:339)
        at java.xml/javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:122)
        at TestXmlParser.main(TestXmlParser.java:14)
Caused by: com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException: Invalid byte 1 of 1-byte UTF-8 sequence.
        at java.xml/com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.invalidByte(UTF8Reader.java:702)
        at java.xml/com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.read(UTF8Reader.java:568)
        at java.xml/com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.load(XMLEntityScanner.java:1904)
        at java.xml/com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.arrangeCapacity(XMLEntityScanner.java:1770)
        at java.xml/com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.skipString(XMLEntityScanner.java:1808)
        at java.xml/com.sun.org.apache.xerces.internal.impl.XMLVersionDetector.determineDocVersion(XMLVersionDetector.java:158)
        at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:860)
        at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:824)
        at java.xml/com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
        at java.xml/com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:246)
        ... 3 more

而不是

Exception in thread "main" com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException: Invalid byte 1 of 1-byte UTF-8 sequence.
        at com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.invalidByte(UTF8Reader.java:684)
        at com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.read(UTF8Reader.java:554)
        at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.load(XMLEntityScanner.java:1742)
        at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.arrangeCapacity(XMLEntityScanner.java:1619)
        at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.skipString(XMLEntityScanner.java:1657)
        at com.sun.org.apache.xerces.internal.impl.XMLVersionDetector.determineDocVersion(XMLVersionDetector.java:193)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:772)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
        at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119)
        at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:232)
        at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:284)
        at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:124)
        at TestXmlParser.main(TestXmlParser.java:14)

以前的版本。

换句话说，parse 现在抛出 SAXParseException，其原因初始化为 MalformedByteSequenceException。因此，要检测问题是格式错误的字节序列，resp。编码错误的文本，你需要像

这样的东西

catch(SAXException ex) {
    if(ex.getCause() instanceof CharConversionException) {
        System.out.println("maformed bytes or wrong encoding: "+ex.getMessage());
    }
}

要处理新版本和旧版本，您需要像

这样的东西

catch(CharConversionException ex) {
    System.out.println("malformed bytes or wrong encoding: "+ex.getMessage());
}
catch(SAXException ex) {
    if(ex.getCause() instanceof CharConversionException) {
        System.out.println("malformed bytes or wrong encoding: "+ex.getMessage());
    }
}

相应

catch(CharConversionException ex) {
    handle(ex);
}
catch(SAXException ex) {
    if(ex.getCause() instanceof CharConversionException) {
        handle((CharConversionException)ex.getCause());
    }
}

…

static void handle(CharConversionException ex) {
    // just an example
    System.out.println("malformed bytes or wrong encoding: "+ex.getMessage());
}

Java11，MalformedByteSequenceException应该替换成什么？

Java11, what shall MalformedByteSequenceException be replaced with?

java

sun

internals

java-11