从java程序写入一个xml文件

  • 步骤 

1.通过DocumentHelper生成一个Document对象

2.添加根元素

3.为根元素添加子元素

4.为某个元素添加属性,(可有可无)

5.给某个元素添加子元素(这个可以迭代完成)

6.给子元素添加文本信息

7.将Document对象的内容输出到一个文件中,并命名为XML文件,

package bjsxt.xml;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;

import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;

public class WriteXML {

    public static void main(String[] args) throws IOException
    {
        //使用DocumentHelper创建一个Document对象
        Document doc = DocumentHelper.createDocument();
        //添加并得到根元素
        Element root =  doc.addElement("books");
        //为根元素添加子元素
        Element book = root.addElement("book");
        //为子元素添加属性
        book.addAttribute("id", "b01");
        //为book添加子元素
        Element name = book.addElement("name");
        Element author = book.addElement("author");
        Element price = book.addElement("price");
        
        //为子元素添加文本信息
        name.addText("Think in Java");
        author.addText("MIKE");
        price.addText("20.5");
        
        //将Document对象的内容写入到一个文件中
        Writer write = new FileWriter(new File("src/book1.xml"));
        doc.write(write);
        
        //关闭流
        write.close();
    }
}

 

运行结果:

<?xml version="1.0" encoding="UTF-8"?>
<books><book id="b01"><name>Think in Java</name><author>MIKE</author><price>20.5</price></book></books>

由于以上结果的结构是不太美好,所以在输出到文件中的过程中需要修改,即以下代码

package bjsxt.xml;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;
import java.sql.SQLException;

import javax.sql.RowSetInternal;
import javax.sql.rowset.WebRowSet;
import javax.sql.rowset.spi.XmlWriter;

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

public class WriteXML {

    public static void main(String[] args) throws IOException
    {
        //使用DocumentHelper创建一个Document对象
        Document doc = DocumentHelper.createDocument();
        //添加并得到根元素
        Element root =  doc.addElement("books");
        //为根元素添加子元素
        Element book = root.addElement("book");
        //为子元素添加属性
        book.addAttribute("id", "b01");
        //为book添加子元素
        Element name = book.addElement("name");
        Element author = book.addElement("author");
        Element price = book.addElement("price");
        
        //为子元素添加文本信息
        name.addText("Think in Java");
        author.addText("MIKE");
        price.addText("20.5");
        
        /*//将Document对象的内容写入到一个文件中
        Writer write = new FileWriter(new File("src/book1.xml"));
        doc.write(write);
        
        //关闭流
        write.close();
        */
        
        //格式良好地输出
        OutputFormat format =  OutputFormat.createPrettyPrint();
        XMLWriter write =  new XMLWriter(new FileWriter(new File("src/book2.xml")),format);
        write.write(doc);
        //关闭流
        write.close();
    }
}

 

 


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


<books>
<book id="b01">
<name>Think in Java</name>
<author>MIKE</author>
<price>20.5</price>
</book>
</books>

 

 

posted @ 2018-10-28 15:35  qzhqzh  阅读(1110)  评论(0编辑  收藏  举报