dom4j解析XML文件（4）—实战

任务目标

服务器：1.服务器将List对象存入XML文件中，XML文件名为emp5.xml

　　　　2.服务器读取XML文件，将文件发送给客户端

客户端：1.客户端接受服务器发送的XML文件，将文件存入磁盘

　　　　2.读取存入的XML文件，解析，然后转为List对象，在控制台打印输出

Emp.java

 1 package XMLServiceAndClient;
 2
 3 public class Emp {
 4     private int id;
 5     private String name;
 6     private int age;
 7     private double salary;
 8     public int getId() {
 9         return id;
10     }
11     public void setId(int id) {
12         this.id = id;
13     }
14     public String getName() {
15         return name;
16     }
17     public void setName(String name) {
18         this.name = name;
19     }
20     public int getAge() {
21         return age;
22     }
23     public void setAge(int age) {
24         this.age = age;
25     }
26     public double getSalary() {
27         return salary;
28     }
29     public void setSalary(double salary) {
30         this.salary = salary;
31     }
32     @Override
33     public String toString() {
34         return "Emp [id=" + id + ", name=" + name + ", age=" + age
35                 + ", salary=" + salary + "]";
36     }
37     public Emp() {
38     }
39     public Emp(int id, String name, int age, double salary) {
40         super();
41         this.id = id;
42         this.name = name;
43         this.age = age;
44         this.salary = salary;
45     }
46
47
48 }

服务器：

 1 package XMLServiceAndClient;
 2
 3 import java.io.File;
 4 import java.io.FileInputStream;
 5 import java.io.FileOutputStream;
 6 import java.io.IOException;
 7 import java.io.OutputStream;
 8 import java.net.ServerSocket;
 9 import java.net.Socket;
10 import java.util.ArrayList;
11 import java.util.List;
12
13 import org.dom4j.Document;
14 import org.dom4j.DocumentHelper;
15 import org.dom4j.Element;
16 import org.dom4j.io.XMLWriter;
17
18 /**
19  *步骤：    1.服务器将List对象存入XML文件中，XML文件名为emp5.xml
20  *        2.服务器读取XML文件，将文件发送给客户端
21  */
22 public class Service {
23     private ServerSocket ss;
24     private int port = 8080;
25     private List<Emp> list;
26     /**利用构造函数初始化ServerSocket*/
27     public Service(){
28         try {
29             ss = new ServerSocket(port);
30             list = new ArrayList<Emp>();
31             list.add(new Emp(1,"张三",20,2000));
32             list.add(new Emp(2,"李四",30,4000));
33             list.add(new Emp(3,"王五",40,6000));
34         } catch (IOException e) {
35             e.printStackTrace();
36         }
37     }
38     /**服务器启动*/
39     public void start(){
40         try {
41             Socket s = ss.accept();//等待客户端进入
42             OutputStream os = s.getOutputStream();//获取输出流
43             Document doc = DocumentHelper.createDocument();//获取document对象
44             Element root = doc.addElement("list");
45             for (Emp emp : list) {
46                 Element e = root.addElement("emp");
47                 e.addAttribute("id", ""+emp.getId());
48                 e.addElement("name").addText(emp.getName());
49                 e.addElement("age").addText(""+emp.getAge());
50                 e.addElement("salary").addText(""+emp.getSalary());
51             }
52             FileOutputStream fos = new FileOutputStream(new File("emp5.xml"));
53             XMLWriter writer = new XMLWriter();
54             writer.setOutputStream(fos);
55             writer.write(doc);//将document输出到XML文件
56             writer.close();
57             fos.close();
58             FileInputStream fis = new FileInputStream(new File("emp5.xml"));
59             byte[] buf = new byte[1024];//设置缓冲区大小
60             int size = -1;
61             while((size=fis.read(buf))!=-1){
62                 os.write(buf, 0, size);
63             }
64             fis.close();
65             s.close();
66         } catch (IOException e) {
67             e.printStackTrace();
68         }
69     }
70     public static void main(String[] args) {
71         Service s = new Service();
72         s.start();
73     }
74 }

客户端：

 1 package XMLServiceAndClient;
 2
 3 import java.io.File;
 4 import java.io.FileOutputStream;
 5 import java.io.InputStream;
 6 import java.net.Socket;
 7 import java.util.ArrayList;
 8 import java.util.List;
 9
10 import org.dom4j.Document;
11 import org.dom4j.Element;
12 import org.dom4j.io.SAXReader;
13
14
15 /**
16  *步骤：    1.客户端接受服务器发送的XML文件，将文件存入磁盘
17  *        2.读取存入的XML文件，解析，然后转为List对象，在控制台打印输出
18  */
19 public class Client {
20     private Socket s;
21     private int port = 8080;
22     private List<Emp> list;
23
24     public void start(){
25         try {
26             s = new Socket("localhost", port);
27             InputStream is = s.getInputStream();
28             FileOutputStream fos = new FileOutputStream(new File("emp6.xml"));
29             byte[] buf = new byte[1024];//设置缓冲区大小
30             int size = -1;
31             while((size=is.read(buf))!=-1){
32                 fos.write(buf, 0, size);
33             }
34             fos.close();
35             s.close();
36             list = new ArrayList<Emp>();
37             SAXReader reader = new SAXReader();
38             Document doc = reader.read(new File("emp6.xml"));
39             Element root = doc.getRootElement();
40             List<Element> elements = root.elements();
41             for (Element element : elements) {
42                 Emp emp = new Emp();
43                 emp.setId(Integer.parseInt(element.attribute("id").getValue()));
44                 emp.setName(element.element("name").getText());
45                 emp.setAge(Integer.parseInt(element.element("age").getText()));
46                 emp.setSalary(Double.parseDouble(element.element("salary").getText()));
47                 list.add(emp);
48             }
49             System.out.println(list);
50         } catch (Exception e) {
51             e.printStackTrace();
52         }
53     }
54
55     public static void main(String[] args) {
56         Client c = new Client();
57         c.start();
58
59     }
60 }