java 处理XML(dom4j-1.6.1)

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Java 处理xml有很多框架，今天使用主流框架dom4j-1.6.1

下载地址：http://www.dom4j.org/dom4j-1.6.1/

Dom4j，是一款开源的处理XML, XPath, and XSLT的框架，它容易使用，并且完全支持DOM, SAX, and JAXP.

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写XML 文件

• 首先创建一个XMLwriter,吧文件写到output.xml

 // lets write to a file
        XMLWriter writer = new XMLWriter(
            new FileWriter( "output.xml" )
        );

 

• 创建一个xml Document

Document document = DocumentHelper.createDocument();

• 接着创建 元素的根节点

Element root = document.addElement( "root" );

• 接下来在根节点添加元素和属性

 root.addElement( "author" )
            .addAttribute( "name", "James" )
            .addAttribute( "location", "UK" )
            .addText( "James Strachan" );

• 最后保存文件

     writer.write( document );
        writer.close();

• 这样保存效果很差，很不美观，如果想要漂亮的效果

OutputFormat format = OutputFormat.createPrettyPrint();
XMLWriter writer = new XMLWriter(new FileWriter("output.xml"), format);

最终的：

import java.io.FileWriter;
import java.io.IOException;

import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;

public class XMLWriterTest {
    /**
     * @author Young
     * @param args
     * @throws IOException
     */
    public static void main(String[] args) throws IOException {
        OutputFormat format = OutputFormat.createPrettyPrint();
        XMLWriter writer = new XMLWriter(new FileWriter("output.xml"), format);

        Document document = DocumentHelper.createDocument();
        Element root = document.addElement("root");

        root.addComment("This is xml comment");
        root.addElement("author").addAttribute("name", "James")
                .addAttribute("location", "UK").addText("James Strachan");
        writer.write(document);
        writer.close();
    }
}

输出效果如下：

 

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

<root>
  <!--This is xml comment-->
  <author name="James" location="UK">James Strachan</author>
</root>

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嵌套写XML

想要的效果如下：

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

<StudentInfo Class="1">
  <!--This is Class 1 student information-->
  <student name="Jack" Sex="Male" Birthday="1988/07/05">100001
    <scores score="90"/>
  </student>
  <student name="Lisa" Sex="Female" Birthday="1989/02/12">100002
    <scores score="98"/>
  </student>
  <student name="Steven" Sex="Male" Birthday="1987/11/18">100003
    <scores score="59"/>
  </student>
  <student name="Jenny" Sex="Female" Birthday="1989/03/18">100004
    <scores score="69"/>
  </student>
  <student name="Lucy" Sex="Female" Birthday="1990/01/26">100005
    <scores score="90"/>
  </student>
  <student name="Lewis" Sex="Male" Birthday="1989/04/06">100006
    <scores score="82"/>
  </student>
</StudentInfo>

每个student节点下设置一个score节点

并且所有student节点属性都一样，于是乎可以创建一个student bean专门用于数据传递：

/***
 * This Class is for Student bean
 * @author Young
 *
 */
public class Student {

    private int stud_Id;
    private String stud_Name;
    private String sex;
    private String birthday;
    private String score;

    public int getStud_Id() {
        return stud_Id;
    }

    public void setStud_Id(int stud_Id) {
        this.stud_Id = stud_Id;
    }

    public String getStud_Name() {
        return stud_Name;
    }

    public void setStud_Name(String stud_Name) {
        this.stud_Name = stud_Name;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public String getBirthday() {
        return birthday;
    }

    public void setBirthday(String birthday) {
        this.birthday = birthday;
    }

    public String getScore() {
        return score;
    }

    public void setScore(String score) {
        this.score = score;
    }

    /**
     * This method is a constructor
     * 
     * @author Young
     * @param id
     * @param name
     * @param sex
     * @param birthday
     * @param score
     */
    public Student(int id, String name, String sex, String birthday,
            String score) {

        this.stud_Id = id;
        this.stud_Name = name;
        this.sex = sex;
        this.birthday = birthday;
        this.score = score;
    }
}

View Code