Dom4j使用总结

Dom4j使用总结

一、创建XML
1、创建Document
A、方式一
SAXReader reader = new SAXReader();
Document document  = reader.read(new FileInputStream(filePath));

B、方式二
Document document = DocumentHelper.createDocument();

C、方式三
DocumentHelper.parseText(contentStr);

2、使用XMLWriter进行write

format = OutputFormat.createCompactFormat(); //设置格式1
//format = OutputFormat.createCompactFormat();      //设置格式2
//format.setEncoding(charsetName); //设置格式3

writer = new XMLWriter(
        new FileOutputStream(savePath), format
    );
writer.write( document );
writer.close();


二、XMl内容操作
1、添加根节点
Element root = document.addElement(rootNameStr);

2、添加子节点
Element element = parentElement.addElement(newElementNameStr);

3、添加节点属性
Element element = element.addAttribute(attributeNameStr, attributeValueStr);

4、设置节点Text
element.setText(text);

5、删除节点
boolean Result;
if (node.getParent() == null){
result = document.remove(node);
}
else
{
result = node.getParent().remove(node);
}
6、修改属性
Attribute attribute = element.attribute(attr_name);
attribute.setValue(attr_value);

三、查询
1、从document获取element（node）集合
   List list = document.selectNodes("/BaselineVersion/Children");
  
2、从document获取element（node）
Node node = document.selectSingleNode(xpath);

3、从node中获取element（node）集合
List list = document.selectNodes(xpath);

4、从node中获取element（node）
Node selNode = node.selectSingleNode(xpath);

四、将XML内容转化String
1、方法一
public static String parseXMLTOString(String content){

String result = null;

result = content.replaceAll("&", "&");

result = result.replaceAll("<", "&lt;");

result = result.replaceAll(">", "&gt;");

result = result.replaceAll("\"", "&quot;");

result = result.replaceAll("'", "&apos;");

return result;

}

五、将String内容转化XML

1、方法一
public static String parseStringToXML(String content){

String result = content;


result = result.replaceAll("&amp;", "&");

result = result.replaceAll("&lt;", "<");

result = result.replaceAll("&gt;", ">");

result = result.replaceAll("&quot;", "\"");

result = result.replaceAll("&apos;", "'");

return result;
}

2、方法二

public static String formatXMLContent(String content){

try {
Document document = DocumentHelper.parseText(content);

OutputFormat format = null;
format = OutputFormat.createPrettyPrint();
format.setPadText(false);

StringWriter stringWriter = new StringWriter();
XMLWriter writer = new XMLWriter( stringWriter, format );
writer.write( document );
writer.close();

String result = stringWriter.toString();
stringWriter.close();
return result;

} catch (Exception e) {
e.printStackTrace();
return content;
}
}