Dom4j生成XML文件

向右看齐 2024-04-18 14:22 35阅读 0赞

**下面是使用Dom4j生成XML的示例：**

package com.xml;
    
    import java.io.File;
    import java.io.FileOutputStream;
    import java.io.OutputStream;
    import java.io.OutputStreamWriter;
    
    import org.dom4j.Document;
    import org.dom4j.DocumentException;
    import org.dom4j.DocumentHelper;
    import org.dom4j.Element;
    import org.dom4j.io.OutputFormat;
    import org.dom4j.io.XMLWriter;
    
    public class Dom4jTest {
    
    	public static void main(String[] args) throws Exception {
    		Dom4jTest test = new Dom4jTest();
    		Document doc = test.generateDocument2();
    		File file = new File("src/com/xml/student.xml");
    		test.saveDocument(doc, file);
    	}
    	public void saveDocument(Document doc,File file) {
    		//美化格式，会进行换行
    		OutputFormat format = OutputFormat.createPrettyPrint();
    		format.setEncoding("UTF-8");
    		//按照字符流将xml输出到指定的file文件中
    		OutputStream os;
    		try {
    			os = new FileOutputStream(file);
    			OutputStreamWriter osw = new OutputStreamWriter(os);
    			XMLWriter writer = new XMLWriter(osw,format);
    			//根据document内容按照xml格式输出
    			writer.write(doc);
    			writer.flush();
    			
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    	}
    	/**
    	 * <students>
    	 *  <student>
    	 *  <student id="1">
    	 *  	<name>...</name>
    	 *  </student>
    	 * </students>
    	 */
    	public Document generateDocument() {
    		//创建文档
    		Document document = DocumentHelper.createDocument();
    		//创建根节点
    		Element studentsElement = document.addElement("students");
    		//创建注释
    		studentsElement.addComment("this is a comment");
    		//创建stu1子节点
    		Element stu1Element = studentsElement.addElement("student");
    		//stu1子节点添加属性
    		stu1Element.addAttribute("id", "1");
    		Element nameElement = stu1Element.addElement("name");
    		nameElement.addText("Tom");
    		Element ageElement = stu1Element.addElement("age");
    		ageElement.addText("20");
    		
    		return document;
    	}
    	
    	public Document generateDocument2() {
    		String str = "<?xml version='1.0' encoding='utf-8'?>"
    				+"<students>"
    				+ ""
    				+"<student id='2'>"
    				+"<name>jack</name><age>20</age>"
    				+ "</student>"
    				+"</students>";
    		
    		Document document = null;
    		try {
    			document = DocumentHelper.parseText(str);
    		} catch (DocumentException e) {
    			e.printStackTrace();
    		}
    		return document;
    	}
    }