java 生成 xml 文件

 Java Bean

package xml;

public class Person {
private String name ;
private int age ;


public Person(String name, int age) {
  super();
  this.name = name;
  this.age = age;
}

public String getName() {
  return name;
}

public void setName(String name) {
  this.name = name;
}

public int getAge() {
  return age;
}

public void setAge(int age) {
  this.age = age;
}


}

测试程序

package xml;

import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

public class XmlGeneratorDemo {
public static void main(String[] args) {
  String outputPath = "src/xml/parser/persons.xml";
  generateXml(outputPath);
}
public static void generateXml(String outputPath) {
  try {
   Person [] arr = new Person[]{new Person("jinbo",20), new Person("gameboy",25)};
   List<Person> list = Arrays.asList(arr);//将数组转换成List
   Document doc = generateXml(list);//生成XML文件
   outputXml(doc, outputPath);//将文件输出到指定的路径
  } catch (Exception e) {
   System.err.println("出现异常");
  }
}
/**
  * 将XML文件输出到指定的路径
  * @param doc
  * @param fileName
  * @throws Exception
  */
private static void outputXml (Document doc, String fileName) throws Exception{
  TransformerFactory tf = TransformerFactory.newInstance();
  Transformer transformer = tf.newTransformer();
  DOMSource source = new DOMSource(doc);
  transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
  transformer.setOutputProperty(OutputKeys.INDENT, "yes");//设置文档的换行与缩进
  PrintWriter pw = new PrintWriter(new FileOutputStream(fileName));
  StreamResult result = new StreamResult(pw);
  transformer.transform(source, result);
  System.out.println("生成XML文件成功!");
}
/**
  * 生成XML文件
  * @param list
  * @return
  */
public static Document generateXml(List<Person> list){
  Document doc = null;
  Element root = null;
  try {
   DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
   DocumentBuilder builder = factory.newDocumentBuilder();
   doc = builder.newDocument();
   root = doc.createElement("person");
   doc.appendChild(root);
  } catch (Exception e) {
   e.printStackTrace();
   return null;//如果出现异常，则不再往下执行
  }
  
  int len = list.size() ;
  Element element ;
  for (int i = 0; i < len; i++) {
   Person person = list.get(i);
   element = doc.createElement("person"+(i+1));
   element.setAttribute("age", ""+person.getAge());
   element.setAttribute("name", person.getName());
   root.appendChild(element);
  }
  return doc;
}
}