如何在VTD Xpath查找上输入名称空间前缀 [英] How to ingore namespace prefixes on VTD Xpath lookup

问题描述

我正在构建一个基于VTD的XML解析引擎，以便处理来自多个输入系统的文件。

我正在尝试从带有命名空间的标签中获取值前缀：

 <？xml version =1.0encoding =UTF-8？> 
< cli：clients xmlns declarations> 
< cli：client> 
< dat：name>客户名称< / dat：name> 
< dat：age> 1< / dat：age> 
< / cli：client> 
  

并查询以下X路径：

  // client / age / text（）
 // client / name / text（）
  

如何设置VTD AutoPilot忽略命名空间前缀？

注意：我无法更改xpath，因为我已经使用JDK的默认xpath引擎实现了这个引擎。

UPDATE ：请参阅下面我用来测试的代码。文件类似于顶部的文件：

  @Test 
 public void doFile（）抛出异常{
 byte [] xmlData = FileUtils.loadFile（namespace-test.xml）; 
 VTDGen gen = new VTDGen（）; 
 gen.setDoc（xmlData）; 
 gen.parse（false）; 
 VTDNav vtd = gen.getNav（）; 
 AutoPilot pilot = new AutoPilot（vtd）; 
 pilot.selectXPath（// clients）; 
 int re = pilot.evalXPath（）; 
 System.out.println（re）; 
 if（re> = 0）{
 System.out.println（vtd.toString（re））; 
} 
} 
  

解决方案

As根据@ vtd-xml-author评论，我得到了最新版本的VTDNav.java文件，并在我自己的项目中编译。

该解决方案首次尝试！ / p>

I'm building a VTD based XML Parsing engine in order to process files from several input systems.

I'm currently trying to get values from tags with namespace prefix:

<?xml version="1.0" encoding="UTF-8"?>
 <cli:clients xmlns declarations >
<cli:client>
    <dat:name>CLIENT NAME</dat:name>
    <dat:age>1</dat:age>
</cli:client>

and querying the following Xpaths:

//client/age/text()
//client/name/text()

How can I set VTD AutoPilot to ignore the namespace prefix?

NOTE: I cannot change the xpaths as I already have this engine in production implemented with JDK's default xpath engine.

UPDATE: See below the code I am using to test. File is similar to the one on the top:

@Test
public void doFile() throws Exception {
    byte[] xmlData = FileUtils.loadFile("namespace-test.xml");
    VTDGen gen = new VTDGen();
    gen.setDoc(xmlData);
    gen.parse(false);
    VTDNav vtd = gen.getNav();
    AutoPilot pilot = new AutoPilot(vtd);
    pilot.selectXPath("//clients");
    int re = pilot.evalXPath();
    System.out.println(re);
    if (re >= 0) {
        System.out.println(vtd.toString(re));
    }
}

解决方案

As per @vtd-xml-author comments, I got the newest version of VTDNav.java file and compiled on my own project.

The solution worked on the first try!

这篇关于如何在VTD Xpath查找上输入名称空间前缀的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！