java exslt date-time()产生意外输出

Question

在执行xslt转换时，时区以一种奇怪的方式序列化。

我尝试在xalan和jaxen之间切换实现，但是没有观察到任何变化。

试图手动地格式化日期，但似乎找不到使用它添加时区的方法(例如，+05:30或-08:00)。

有没有人遇到过类似的问题？

结果产生

<?xml version="1.0" encoding="UTF-8"?>
<Test xmlns:date="http://exslt.org/dates-and-times" version="1.0">
    2019-06-20T10:23:31+05:1800000
</Test>

预期结果

<?xml version="1.0" encoding="UTF-8"?>
<Test xmlns:date="http://exslt.org/dates-and-times" version="1.0">
    2019-06-20T10:23:31+05:30
</Test>

我的示例代码如下

Main.java

package test;

import javax.xml.transform.OutputKeys;
import javax.xml.transform.Templates;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.net.URISyntaxException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.TimeZone;

import static java.nio.charset.StandardCharsets.UTF_8;

public class Main {
    public static void main(String[] args) {
        printTransformed(TimeZone.getTimeZone("Asia/Kolkata"));
    }

    private static void printTransformed(TimeZone timeZone) {
        TimeZone.setDefault(timeZone);
        try {
            final StreamSource source = new StreamSource(
                    Files.newInputStream(
                            Paths.get(PrintAllTimeZones1.class.getResource("/input.xml").toURI())));

            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            Templates xsltTemplate = transformerFactory.newTemplates(
                    new StreamSource(Files.newInputStream(
                            Paths.get(Application.class.getResource("/test.xslt").toURI()))));

            final Transformer transformer = xsltTemplate.newTransformer();
            transformer.setOutputProperty(OutputKeys.ENCODING, UTF_8.name());
            final ByteArrayOutputStream out = new ByteArrayOutputStream();
            final StreamResult result = new StreamResult(out);
            transformer.transform(source, result);
            System.out.println(result.getOutputStream().toString());
        } catch (IOException e) {
            e.printStackTrace();
        } catch (URISyntaxException e) {
            e.printStackTrace();
        } catch (TransformerException e) {
            e.printStackTrace();
        }
    }
}

input.xml

<?xml version="1.0" encoding="UTF-8" ?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
    <SOAP-ENV:Header/>
    <SOAP-ENV:Body>
    </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

test.xslt

<Test version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
      xmlns:date="http://exslt.org/dates-and-times">
    <xsl:value-of select="date:date-time()"/>
</Test>

build.gradle

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:2.1.4.RELEASE")
    }
}

apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'idea'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'

bootJar {
    baseName = 'gs-spring-boot'
    version =  '0.1.0'
}

repositories {
    mavenCentral()
}

sourceCompatibility = 1.8
targetCompatibility = 1.8

dependencies {
    compile("org.springframework.boot:spring-boot-starter-web")
    compile 'jaxen:jaxen'
    testCompile("junit:junit")
    compile group: 'xalan', name: 'xalan', version: '2.7.2'


    compile group: 'xmlunit', name: 'xmlunit', version: '1.6'

    compile group: 'org.apache.avro', name: 'avro', version: '1.9.0'

}

Answer 1

获得2019-06-20T10:23:31+05:1800000的原因是xalan的ExsltDatetime实现将添加GMT偏移量和DST偏移量(5.5个小时)。但是，在以小时&分钟计算偏移量时，xalan实现中似乎存在缺陷。

在xalan的ExsltDatetime类中偏移的代码

int offset = cal.get(Calendar.ZONE_OFFSET) + cal.get(Calendar.DST_OFFSET);
// If there is no offset, we have "Coordinated
// Universal Time."
if (offset == 0)
    buff.append('Z');
 else {
    // Convert milliseconds to hours and minutes
     int hrs = offset/(60*60*1000);
     // In a few cases, the time zone may be +/-hh:30.
      int min = offset%(60*60*1000);
      char posneg = hrs < 0? '-': '+';
      buff.append(posneg + formatDigits(hrs) + ':' + formatDigits(min));
  }

上述代码以小时为5表示偏移量，这很好，但分钟偏移量计算为1800000，这是不正确的。

其他部分应正确计算剩余偏移量的记录，如下所示：

  // Convert milliseconds to hours and minutes
  int hrs = offset/(60*60*1000);
  // In a few cases, the time zone may be +/-hh:30.
  //get the remaining offset in ms
  offset -= (hrs*60*60*1000);
  //convert remaining offset into minutes
  int min = offset/(60*1000);
  char posneg = hrs < 0? '-': '+';
  buff.append(posneg + formatDigits(hrs) + ':' + formatDigits(min));

以上是经过修正的代码，它正确地返回分钟作为30分钟。

要在XSLT中为当前日期使用不同/简单的日期格式化程序，可以使用：

<Test version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:date="xalan://java.text.SimpleDateFormat"
        xmlns:java="http://xml.apache.org/xslt/java">
               <xsl:variable name="iso-date"
                select='date:new("yyyy-MM-dd&apos;T&apos;hh:mm:ssXXX")' />
    <xsl:value-of select="java:format($iso-date, java:java.util.Date.new())"/>
</Test>

您也可以尝试XSLT2.0格式函数