Groovy:将节点添加到NodeChildren

Question

我是Groovy的新手，不知何故在语法上苦苦挣扎。我有一个NodeChildren类型的对象(在groovy.util.slurpersupport中)，它表示如下的XML结构：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.camerontec.catalys.node</groupId>
  <artifactId>catalys-node-core</artifactId>
  <version>2.1-SNAPSHOT</version>
  <dependencies>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.0</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>1.6.2</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>commons-lang</groupId>
      <artifactId>commons-lang</artifactId>
      <version>2.4</version>
      <scope>compile</scope>
    </dependency>
  </dependencies>
</project>

我所要做的就是给它添加另一个依赖项，例如：

<dependency>
  <groupId>jdom</groupId>
  <artifactId>jdom</artifactId>
  <version>1.1.1</version>
  <scope>compile</scope>
</dependency>

我必须相当简单，但由于某些原因，我无法理解它。感谢您的帮助。

Answer 1

您可以使用XmlSlurper (如果您关闭名称空间，使XmlSlurper不会在所有非名称空间的标签前加上tag0) --我删除了两个原始的dep，以节省本答案中的空间

import groovy.xml.*

def original = '''<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.camerontec.catalys.node</groupId>
  <artifactId>catalys-node-core</artifactId>
  <version>2.1-SNAPSHOT</version>
  <dependencies>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.0</version>
      <scope>compile</scope>
    </dependency>
  </dependencies>
</project>'''

def newDep = '''<dependency>
  <groupId>jdom</groupId>
  <artifactId>jdom</artifactId>
  <version>1.1.1</version>
  <scope>compile</scope>
</dependency>'''

def newNode = new XmlSlurper().parseText( newDep )
def oldNode = new XmlSlurper( false, false ).parseText( original )

oldNode.dependencies.appendNode( newNode )
String xmlStr = XmlUtil.serialize( new StreamingMarkupBuilder().bind { mkp.yield oldNode } )
println xmlStr