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转载 Dom4j生成xml
首先我们给出一段示例程序:
import
java.io.File;
import
java.io.FileWriter;
import
java.util.Iterator;
import
org.dom4j.Document;
import
org.dom4j.DocumentHelper;
import
org.dom4j.Element;
import
org.dom4j.io.OutputFormat;
import
org.dom4j.io.SAXReader;
import
org.dom4j.io.XMLWriter;
public
class
DOM4JTest
{
/**
*/
/**
*/
/**
*/
/**
* DOM4J读写XML示例
*
*
@param
args
*
@throws
Exception
*/
public
static
void
main(String[] args)
{
try
{
XMLWriter writer
=
null
;
//
声明写XML的对象
SAXReader reader
=
new
SAXReader();
OutputFormat format
=
OutputFormat.createPrettyPrint();
format.setEncoding(
"
GBK
"
);
//
设置XML文件的编码格式
String filePath
=
"
d://student.xml
"
;
File file
=
new
File(filePath);
if
(file.exists())
{
Document document
=
reader.read(file);
//
读取XML文件
Element root
=
document.getRootElement();
//
得到根节点
boolean
bl
=
false
;
for
(Iterator i
=
root.elementIterator(
"
学 生
"
); i.hasNext();)
{
Element student
=
(Element) i.next();
if
(student.attributeValue(
"
sid
"
).equals(
"
001
"
))
{
//
修改学生sid=001的学生信 息
student.selectSingleNode(
"
姓 名
"
).setText(
"
王五
"
);
student.selectSingleNode(
"
年 龄
"
).setText(
"
25
"
);
writer
=
new
XMLWriter(
new
FileWriter(filePath), format);
writer.write(document);
writer.close();
bl
=
true
;
break
;
}
}
if
(bl)
{
//
添加一个学生信息
Element student
=
root.addElement(
"
学 生
"
);
student.addAttribute(
"
sid
"
,
"
100
"
);
Element sid
=
student.addElement(
"
编 号
"
);
sid.setText(
"
100
"
);
Element name
=
student.addElement(
"
姓 名
"
);
name.setText(
"
嘎嘎
"
);
Element sex
=
student.addElement(
"
性 别
"
);
sex.setText(
"
男
"
);
Element age
=
student.addElement(
"
年 龄
"
);
age.setText(
"
21
"
);
writer
=
new
XMLWriter(
new
FileWriter(filePath), format);
writer.write(document);
writer.close();
}
}
else
{
//
新建student.xml文件并新增内容
Document _document
=
DocumentHelper.createDocument();
Element _root
=
_document.addElement(
"
学 生信息
"
);
Element _student
=
_root.addElement(
"
学 生
"
);
_student.addAttribute(
"
sid
"
,
"
001
"
);
Element _id
=
_student.addElement(
"
编 号
"
);
_id.setText(
"
001
"
);
Element _name
=
_student.addElement(
"
姓 名
"
);
_name.setText(
"
灰机
"
);
Element _age
=
_student.addElement(
"
年 龄
"
);
_age.setText(
"
18
"
);
writer
=
new
XMLWriter(
new
FileWriter(file), format);
writer.write(_document);
writer.close();
}
System.out.println(
"
操作结束!
"
);
}
catch
(Exception e)
{
e.printStackTrace();
}
}
}
执行结果应该是这样:
循环解析节点:
private
void
getAllNodes(String xml)
{
try
{
Document authtmp
=
DocumentHelper.parseText(xml);
List
<
Element
>
list
=
authtmp.selectNodes(
"
//sms/node
"
);
for
(
int
j
=
0
; j
<
list.size(); j
++
)
{
Element node
=
(Element) list.get(j);
nodeByNodes(node);
}
}
catch
(Exception e)
{
e.printStackTrace();
}
}
private
void
nodeByNodes(Element node)
{
if
(node.element(
"
node
"
)
!=
null
)
{
String id
=
node.attributeValue(
"
id
"
);
String name
=
node.attributeValue(
"
name
"
);
System.out.print(id
+
"
-------
"
);
System.out.println(name);
for
(Iterator i
=
node.elementIterator(
"
node
"
); i.hasNext();)
{
Element newNode
=
(Element) i.next();
nodeByNodes(newNode);
}
}
else
{
String id
=
node.attributeValue(
"
id
"
);
String name
=
node.attributeValue(
"
name
"
);
System.out.print(id
+
"
-------
"
);
System.out.println(name);
}
}
posted @
2011-09-07 19:40
小0
阅读(
155
) 评论(
0
)
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