高级编程--XML+socket练习题
1.
（1）使用dom4j将信息存入xml中
（2）读取信息，并打印控制台
（3）添加一个city节点与子节点
（4）使用socket TCP协议编写服务端与客户端，
客户端输入城市ID，服务器响应相应城市信息
（5）使用socket TCP协议编写服务端与客户端，客户端要求用户输入city对象，服务端接收并使用dom4j保存至XML文件
（1）（2）（3）
Manager
package homework01;
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.SAXReader;
import org.dom4j.io.SAXWriter;
import org.dom4j.io.XMLWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.util.List;
/**
* @Author: Insight
* @Description: TODO
* @Date: 2024/9/12 14:03
* @Version: 1.0
*/
public class Manager {
public Document document;
public Manager() throws DocumentException {}
//创建文件 并写入信息
public void createxml(String filepath) throws IOException {
document = DocumentHelper.createDocument();
Element rootElement = document.addElement("citys");
addInfo(rootElement,"010","北京","华北","2114.8万人");
addInfo(rootElement,"021","上海","华东","2500万人");
addInfo(rootElement,"028","南京","华西","1417万人");
//写入
OutputFormat output = new OutputFormat();
XMLWriter writer = new XMLWriter(new FileWriter(filepath),output);
writer.write(document);
writer.close();
}
//写入信息
public void addInfo(Element root,String id,String cityname,String cityarea,String population){
Element city = root.addElement("city");
city.addAttribute("id",id);
city.addElement("cityname").addText(cityname);
city.addElement("cityarea").addText(cityarea);
city.addElement("population").addText(population);
}
//读取信息并打印
public void readXML(String filepath) throws DocumentException {
//创建编译器
SAXReader saxReader = new SAXReader();
document = saxReader.read(filepath);
Element rootElement = document.getRootElement();
List citys = rootElement.elements();
for (Element city : citys){
System.out.println("--------------------------");
System.out.println("城市id：" + city.attributeValue("id"));
System.out.println("城市名称：" + city.elementText("cityname"));
System.out.println("城市区域：" + city.elementText("cityarea"));
System.out.println("城市人口：" + city.elementText("population"));
}
}
//添加city节点与子节点
//添加city节点
public void addcity(String filepath,String id,String cityname,String cityarea,String population) throws DocumentException, IOException {
SAXReader saxReader = new SAXReader();
document = saxReader.read(filepath);
Element rootElement = document.getRootElement();
addInfo(rootElement,id,cityname,cityarea,population);
OutputFormat format = OutputFormat.createPrettyPrint();
XMLWriter writer = new XMLWriter(new FileWriter(filepath), format);
writer.write(document);
writer.close();
}
public String findCityById(String filepath,String id) throws DocumentException {
SAXReader saxReader = new SAXReader();
document = saxReader.read(filepath);
Element rootElement = document.getRootElement();
List citys = rootElement.elements();
for (Element el : citys){
if (el.attributeValue("id").equals(id)){
return "城市id：" + el.attributeValue("id") + "\t城市名称：" + el.elementText("cityname") + "\t城市区域：" + el.elementText("cityarea")
+ "\t城市人口：" + el.elementText("population");
}
}
return "没有找到";
}
}
Test
package homework01;
import homework01.Manager;
import org.dom4j.DocumentException;
/**
* @Author: Insight
* @Description: TODO
* @Date: 2024/9/12 12:02
* @Version: 1.0
*/
public class Test {
public static void main(String[] args) {
try {
Manager manager = new Manager();
manager.createxml("./src/homework01/1.xml");
manager.addcity("./src/homework01/1.xml","100","河南","华中","9936.6万人");
manager.readXML("./src/homework01/1.xml");
} catch (Exception e) {
e.printStackTrace();
}
}
}
（4）（5）
cityServer
package homework01;
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
/**
* @Author: Insight
* @Description: TODO
* @Date: 2024/9/12 17:17
* @Version: 1.0
*/
public class cityServer {
public static void main(String[] args) {
try {
Manager manager = new Manager();
ServerSocket serverSocket = new ServerSocket(8088);
System.out.println("服务器启动，监听端口为8088");
Socket socket = serverSocket.accept();
System.out.println("客户端连接成功");
do{
InputStream is = socket.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
PrintWriter output = new PrintWriter(socket.getOutputStream(),true);
String select = br.readLine();
// System.out.println(select);
if ("0".equals(select)){
break;
}
System.out.println(select);
//根据id查信息
if ("1".equals(select)){
String clientId = br.readLine();
System.out.println(clientId);
String cityInfo = manager.findCityById("./src/homework01/1.xml",clientId);
output.println(cityInfo);
}
//添加信息
if ("2".equals(select)){
String clientId = br.readLine();
String cityname = br.readLine();
String cityarea = br.readLine();
String population = br.readLine();
manager.addcity("./src/homework01/1.xml",clientId,cityname,cityarea,population);
output.println("添加成功");
}
}while(true);
} catch (Exception e) {
e.printStackTrace();
}
}
}
cityClient
package homework01;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
/**
* @Author: Insight
* @Description: TODO
* @Date: 2024/9/12 17:17
* @Version: 1.0
*/
public class cityClient {
public static void main(String[] args) throws IOException {
String host = "localhost";
int port = 8088;
Socket socket = new Socket(host, port);
try {
do{
PrintWriter output = new PrintWriter(socket.getOutputStream(), true);
BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
System.out.println("请输入您要选择的操作：1、查看城市信息 2、添加城市 0、退出");
String select = reader.readLine();
output.println(select);
if ("0".equals(select)){
socket.close();
break;
}
if ("1".equals(select)){
System.out.println("请输入城市ID");
String clientId = reader.readLine();
output.println(clientId);
}
if ("2".equals(select)){
System.out.println("请输入城市ID");
String clientId = reader.readLine();
System.out.println("请输入城市信息：");
System.out.println("城市名称：");
String cityname = reader.readLine();
System.out.println("城市区域：");
String cityarea = reader.readLine();
System.out.println("城市人口：");
String population = reader.readLine();
output.println(clientId);
output.println(cityname);
output.println(cityarea);
output.println(population);
}
String serverResponse = input.readLine();
// while (serverResponse != null){
System.out.println("Server response: " + serverResponse);
// }
}while(true);
} catch (Exception e) {
e.printStackTrace();
}
}
}