//在第一本书的第三个位置加一个价钱
@Test
public void test1() throws DocumentException, Exception{
SAXReader read=
new SAXReader();
Document document=read.read(
"src/Demo2.xml");
Element root=
document.getRootElement();
List list=root.element(
"书").elements();
Element price=DocumentHelper.createElement(
"价钱");
price.setText("998元");
list.add(2,price);
OutputFormat format = OutputFormat.createPrettyPrint();
//格式化输入器
format.setEncoding(
"UTF-8");
//设置格式化输入的编码
XMLWriter writer =
new XMLWriter(
new FileOutputStream(
"src/Demo2.xml"),format);
writer.write(document);
writer.close();
}
/*删除第三个价钱
*<书>
<书名>什么都不知道</书名>
<作者>某及</作者>
<价钱>100</价钱>
<价钱>100元</价钱>
<价钱>998</价钱>
<价钱>98</价钱>
</书>
*
*/
@Test
public void test2() throws Exception{
SAXReader read=
new SAXReader();
Document document=read.read(
"src/Demo2.xml");
Element root=
document.getRootElement();
Element price=(Element)root.element(
"书").elements(
"价钱").
get(
2);
if(price.getParent().remove(price)){
System.out.println(
"删除成功");
}
OutputFormat format=
new OutputFormat();
format.setEncoding("UTF-8");
XMLWriter write=
new XMLWriter(
new FileOutputStream(
"src/Demo2.xml"),format);
write.write(document);
write.close();
}
@Test
public void test3() throws Exception{
SAXReader read=
new SAXReader();
Document document=read.read(
"src/Demo2.xml");
Element root=
document.getRootElement();
Element book_2=(Element)root.elements(
"书").
get(
1);
book_2.element("价钱").setText(
"无价之宝");
OutputFormat format=
new OutputFormat();
format.setEncoding("UTF-8");
XMLWriter write=
new XMLWriter(
new FileOutputStream(
"src/Demo2.xml"),format);
write.write(document);
write.close();
}
