DOM4j的修改删除方式

?xml version="1.0" encoding="UTF-8"?>

<contactList>

    <contact id="1">

        <name>某某</name>

        <age>20</age>

        <phone>15426354785</phone>

        <qq>1024557455</qq>

    </contact>

    <contact id="2">

        <name>张三</name>

        <age>44</age>

        <phone>17854213658</phone>

        <qq>1024532584</qq>

    </contact>

</contactList>