将XML代码段插入Groovy中的另一个XML文档中 [英] Inserting XML snippet into another XML document in Groovy

问题描述

以下代码段应在elem之后紧接着将片段XML插入主体.

The following code snippet should insert the fragment XML into body, right after elem.

def body = '''
    <parent>
        <child>
          <elem>
            <name>Test</name>
          </elem>
        </child>
    </parent>
'''

def fragment = '''
    <foo>
        <bar>hello!</bar>
        <baz/>
    </foo>
'''

def bodyNode     = new XmlParser().parseText(body)
def fragmentNode = new XmlParser().parseText(fragment)

bodyNode.child*.appendNode(fragmentNode)

def newFileName= '/Users/xxx/out.xml'
def writer = new FileWriter(newFileName)
new XmlNodePrinter(new PrintWriter(writer)).print(bodyNode)    

out.xml的预期内容:

Expected content of out.xml:

<parent>
   <child>
      <elem>
         <name>Test</name>
      </elem>
      <foo>
         <bar>hello!</bar>
         <baz/>
      </foo>
   </child>
</parent>

但是我得到的却是:

<parent>
   <child>
      <elem>
         <name>Test</name>
       </elem>
       <foo/>
   </child>
</parent>

如您所见，省略了foo元素的内容.出现这种现象的原因是什么?如何获得正确的输出?

As you can see the content of foo element is omitted. What is the reason for this behavior and how can I achieve the correct output?

推荐答案

原因:

使用appendNode()而不是append().尝试以下方法:

use of appendNode() instead of append(). Try this instead:

bodyNode.child*.append(fragmentNode)

或者

这是使用XmlSlurper获得正确输出的一种方法:

This is one way to achieve the correct output using XmlSlurper:

def body = '''
    <parent>
        <child>
          <elem>
            <name>Test</name>
          </elem>
        </child>
    </parent>
'''

def fragment = '''
    <foo>
        <bar>hello!</bar>
        <baz/>
    </foo>
'''

def slurper      = new XmlSlurper( false, false, false )
def bodyNode     = slurper.parseText( body )
def fragmentNode = slurper.parseText( fragment )

bodyNode.child << fragmentNode

def sw = new StringWriter()
groovy.xml.XmlUtil.serialize(bodyNode, sw)
println sw.toString()

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