通过XmlWriter写入XML

Posted 2020-09-07

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

EMP.java代码内容

 1 package xmlDemo;
 2 
 3 public class EMP {
 4     int id;
 5     String name;
 6     int age;
 7     String gender;
 8     double salary;
 9 
10     public EMP(int id, String name, int age, String gender, double salary) {
11         this.id = id;
12         this.name = name;
13         this.age = age;
14         this.gender = gender;
15         this.salary = salary;
16     }
17 
18 }

XmlWriter.java代码内容

 1 package xmlDemo;
 2 
 3 import java.io.FileNotFoundException;
 4 import java.io.FileOutputStream;
 5 import java.io.IOException;
 6 import java.io.UnsupportedEncodingException;
 7 import java.util.ArrayList;
 8 import java.util.List;
 9 
10 import org.dom4j.Document;
11 import org.dom4j.DocumentHelper;
12 import org.dom4j.Element;
13 import org.dom4j.io.OutputFormat;
14 import org.dom4j.io.XMLWriter;
15 
16 public class XmlWriter {
17     public static void main(String[] args) {
18         List<EMP> list = new ArrayList<EMP>();
19         list.add(new EMP(1, "张三", 23, "男", 20000));
20         list.add(new EMP(2, "李四", 24, "男", 21000));
21         list.add(new EMP(3, "王五", 25, "男", 22000));
22         list.add(new EMP(4, "张三", 26, "男", 23000));
23         list.add(new EMP(5, "张三", 27, "男", 24000));
24         // 创建文档对象
25         Document doc = DocumentHelper.createDocument();
26         // 创建根节点
27         Element root = doc.addElement("emps");
28         for (EMP emp : list) {
29             // 根据集合里面的emp添加emp节点
30             Element empElement = root.addElement("emp");
31             // 添加员工的属性节点，并为属性节点=附文本值
32             empElement.addElement("id").setText(Integer.toString(emp.id));
33             empElement.addElement("age").setText(Integer.toString(emp.age));
34             empElement.addElement("name").setText(emp.name);
35             empElement.addElement("gender").setText(emp.gender);
36             empElement.addElement("salary").setText(Double.toString(emp.salary));
37             // 把id当属性添加
38             empElement.addAttribute("id", Integer.toString(emp.id));
39         }
40         // 设置XML文档格式
41         OutputFormat outputFormat = OutputFormat.createPrettyPrint();
42         // 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
43         outputFormat.setEncoding("UTF-8");
44         // outputFormat.setSuppressDeclaration(true); //是否生产xml头
45         outputFormat.setIndent(true); // 设置是否缩进
46         outputFormat.setIndent("    "); // 以四个空格方式实现缩进
47         outputFormat.setNewlines(true); // 设置是否换行
48         XMLWriter writer = null;
49         try {
50             writer = new XMLWriter(outputFormat);
51         } catch (UnsupportedEncodingException e1) {
52             e1.printStackTrace();
53         }
54         try {
55             FileOutputStream fos = new FileOutputStream("emps.xml");
56             writer.setOutputStream(fos);
57             writer.write(doc);
58             writer.close();
59             System.out.println("写入完毕！");
60         } catch (UnsupportedEncodingException e) {
61             e.printStackTrace();
62         } catch (FileNotFoundException e) {
63             e.printStackTrace();
64         } catch (IOException e) {
65             e.printStackTrace();
66         }
67     }
68 }

写入完成的emps.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 
 3 <emps>
 4     <emp id="1">
 5         <id>1</id>
 6         <age>23</age>
 7         <name>张三</name>
 8         <gender>男</gender>
 9         <salary>20000.0</salary>
10     </emp>
11     <emp id="2">
12         <id>2</id>
13         <age>24</age>
14         <name>李四</name>
15         <gender>男</gender>
16         <salary>21000.0</salary>
17     </emp>
18     <emp id="3">
19         <id>3</id>
20         <age>25</age>
21         <name>王五</name>
22         <gender>男</gender>
23         <salary>22000.0</salary>
24     </emp>
25     <emp id="4">
26         <id>4</id>
27         <age>26</age>
28         <name>张三</name>
29         <gender>男</gender>
30         <salary>23000.0</salary>
31     </emp>
32     <emp id="5">
33         <id>5</id>
34         <age>27</age>
35         <name>张三</name>
36         <gender>男</gender>
37         <salary>24000.0</salary>
38     </emp>
39 </emps>