Dom4j 查找节点或属性

Dom4j  查找节点或属性

例如

  1 查找下面xml中的student节点的age属性,

xpathstr="/students/student/@age";

 2 查找下面xml中的student节点的telephone的值,

xpathstr="/students/student/telephone";

 3 查找下面xml中的student节点的telephone的值,并且要满足name中包含“2030”,用到模糊查找

xpathstr="/students/student[contains("name","2030")]/telephone";

 

完整的xml文件:

<?xml version="1.0" encoding="UTF-8"?>
<students>
  <student name="beijings2014" age="25">
    <college>mobile</college>
    <telephone>888</telephone>
  </student>

     <student name="shanghais2019">
    <college>pc</college>
    <telephone>999</telephone>
  </student>

     <student name="xi'ans2030">
    <college>pad</college>
    <telephone>000</telephone>
  </student>
</students>

  

 具体方法:查找节点或属性,传入Document 和 xpathstr,此处Document 类型为 org.dom4j.Document,

               如果用的是org.w3c.dom.Document则需要转换,可以看之前的一篇"

org.w3c.dom.Document 与org.dom4j.Document互转

"

 

 1 public String getContentString(Document document,String xpathstr){

 2         

 3         List list = document.selectNodes(xpathstr);

 4         String result="";

 5          

 6         Iterator iter = list.iterator();

 7         iter = list.iterator();

 8         if (iter.hasNext()) {

 9             

10             Object o=iter.next();

11             if(o instanceof Attribute){

12                 Attribute attribute = (Attribute) o;         

13                 //hm.put(attribute.getName(),attribute.getValue());

14                 result=attribute.getValue();

15                 if(debugf){

16                     System.out.println(attribute.getName()+":"+attribute.getValue());

17                 }

18                 

19             }

20             if(o instanceof Element){

21                 Element element = (Element) o;

22                  String name = element.getName();

23                  String value = element.getText();

24                  //hm.put(name, value);

25                  result=value;

26                  if(debugf){

27                  System.out.println(name+":"+value);

28                  }

29             }

30         } else {

31             return result;

32         }

33         return result;

34     }

 

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