通过XmlWriter写入XML

红太狼 2021-03-26 14:22 434阅读 0赞

包路径：（需要导入包：dom4j-1.6.1.jar和jaxen-1.2.0-atlassian-2.jar）

![1129065-20170331151009430-890494013.png][]

EMP.java代码内容

package xmlDemo;
     
     public class EMP {
         int id;
         String name;
         int age;
         String gender;
         double salary;
     
         public EMP(int id, String name, int age, String gender, double salary) {
             this.id = id;
             this.name = name;
             this.age = age;
             this.gender = gender;
             this.salary = salary;
         }
     
     }

XmlWriter.java代码内容

package xmlDemo;
     
     import java.io.FileNotFoundException;
     import java.io.FileOutputStream;
     import java.io.IOException;
     import java.io.UnsupportedEncodingException;
     import java.util.ArrayList;
     import java.util.List;
     
     import org.dom4j.Document;
     import org.dom4j.DocumentHelper;
     import org.dom4j.Element;
     import org.dom4j.io.OutputFormat;
     import org.dom4j.io.XMLWriter;
     
     public class XmlWriter {
         public static void main(String[] args) {
             List<EMP> list = new ArrayList<EMP>();
             list.add(new EMP(1, "张三", 23, "男", 20000));
             list.add(new EMP(2, "李四", 24, "男", 21000));
             list.add(new EMP(3, "王五", 25, "男", 22000));
             list.add(new EMP(4, "张三", 26, "男", 23000));
             list.add(new EMP(5, "张三", 27, "男", 24000));
             // 创建文档对象
             Document doc = DocumentHelper.createDocument();
             // 创建根节点
             Element root = doc.addElement("emps");
             for (EMP emp : list) {
                 // 根据集合里面的emp添加emp节点
                 Element empElement = root.addElement("emp");
                 // 添加员工的属性节点，并为属性节点=附文本值
                 empElement.addElement("id").setText(Integer.toString(emp.id));
                 empElement.addElement("age").setText(Integer.toString(emp.age));
                 empElement.addElement("name").setText(emp.name);
                 empElement.addElement("gender").setText(emp.gender);
                 empElement.addElement("salary").setText(Double.toString(emp.salary));
                 // 把id当属性添加
                 empElement.addAttribute("id", Integer.toString(emp.id));
             }
             // 设置XML文档格式
             OutputFormat outputFormat = OutputFormat.createPrettyPrint();
             // 设置XML编码方式,即是用指定的编码方式保存XML文档到字符串(String),这里也可以指定为GBK或是ISO8859-1
             outputFormat.setEncoding("UTF-8");
             // outputFormat.setSuppressDeclaration(true); //是否生产xml头
             outputFormat.setIndent(true); // 设置是否缩进
             outputFormat.setIndent("    "); // 以四个空格方式实现缩进
             outputFormat.setNewlines(true); // 设置是否换行
             XMLWriter writer = null;
             try {
                 writer = new XMLWriter(outputFormat);
             } catch (UnsupportedEncodingException e1) {
                 e1.printStackTrace();
             }
             try {
                 FileOutputStream fos = new FileOutputStream("emps.xml");
                 writer.setOutputStream(fos);
                 writer.write(doc);
                 writer.close();
                 System.out.println("写入完毕！");
             } catch (UnsupportedEncodingException e) {
                 e.printStackTrace();
             } catch (FileNotFoundException e) {
                 e.printStackTrace();
             } catch (IOException e) {
                 e.printStackTrace();
             }
         }
     }

写入完成的emps.xml

<?xml version="1.0" encoding="UTF-8"?>
     
     <emps>
         <emp id="1">
             <id>1</id>
             <age>23</age>
             <name>张三</name>
             <gender>男</gender>
             <salary>20000.0</salary>
         </emp>
         <emp id="2">
             <id>2</id>
             <age>24</age>
             <name>李四</name>
             <gender>男</gender>
             <salary>21000.0</salary>
         </emp>
         <emp id="3">
             <id>3</id>
             <age>25</age>
             <name>王五</name>
             <gender>男</gender>
             <salary>22000.0</salary>
         </emp>
         <emp id="4">
             <id>4</id>
             <age>26</age>
             <name>张三</name>
             <gender>男</gender>
             <salary>23000.0</salary>
         </emp>
         <emp id="5">
             <id>5</id>
             <age>27</age>
             <name>张三</name>
             <gender>男</gender>
             <salary>24000.0</salary>
         </emp>
     </emps>

[1129065-20170331151009430-890494013.png]: /images/20210326/1616768517426.png