クライアント/サーバーを使用して、コマンド ラインで指定された (ファイルから) 単語を検索しようとしています。これが私のコードですが、クライアント部分の実行時には何も表示されません。サーバーを実行するには、コマンド ラインで
-s <port number> <file.txt>クライアントの場合は and と入力します。-c localhost <port number> <word to be searched>
import java.net.*;
import java.util.*;
import java.io.*;
public class quotes {
public static InetAddress host;
public static ServerSocket serverSocket;
public static String target;
public static void main(String[] args) throws IOException {
if(args[0].equals("-c")){
Client(args);
target = args[3];
}
else if(args[0].equals("-s")){
System.out.println("Server");
Server(args);
}
}
@SuppressWarnings("resource")
public static void Client(String[] args) throws IOException{
String hostname = args[1];
if(hostname.equals("localhost")) host = InetAddress.getLocalHost();
else host = InetAddress.getByName(hostname);
int port = Integer.parseInt(args[2]);
Socket socket = new Socket(host, port);
Scanner input = new Scanner(System.in);
Scanner networkInput = new Scanner(socket.getInputStream());
PrintWriter networkOutput = new PrintWriter(socket.getOutputStream(), true);
Scanner userEntry = new Scanner(System.in);
String response;
networkOutput.println(target);
response = networkInput.nextLine();
while(!response.equals("|")){
System.out.println("\n " + response);
response = networkInput.nextLine();
}
}
public static void Server(String[] args) throws IOException {
int port = Integer.parseInt(args[1]);
String file = args[2];
serverSocket = new ServerSocket(port);
do {
Socket client = serverSocket.accept();
System.out.println("\nNew client accepted.\n");
ClientHandler3 handler = new ClientHandler3(client, file);
handler.start();
}while(true);
}
}
class ClientHandler3 extends Thread {
private Socket client;
private Scanner input;
private PrintWriter output;
private ArrayList<String> quotes;
public ClientHandler3(Socket socket, String file) {
client = socket;
try {
BufferedReader buffer = new BufferedReader(new FileReader(file));
BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream()));
String line = reader.readLine();
try {
int ctr = 0;
quotes = new ArrayList<String>();
while(line != null){
quotes.add(ctr, line);
ctr++;
line = buffer.readLine();
}
} catch (IOException e) {
e.printStackTrace();
}
} catch (FileNotFoundException e1) {
e1.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
input = new Scanner(client.getInputStream());
output = new PrintWriter(client.getOutputStream(), true);
}
catch(IOException e) {
e.printStackTrace();
}
}
public void run() {
String target;
String message = "";
target= args[3];
for(int i = 0; i<quotes.size(); i++){
if(quotes.get(i).toUpperCase().contains(target.toUpperCase())){
output.println(quotes.get(i));
}
}
output.println("|");
try {
if (client != null) {
System.out.println("Closing down connection...");
client.close();
}
}
catch(IOException e) {
System.out.println("Unable to disconnect!");
}
}
}
(いくつかの変更とアドバイスを提供してくれた JB Nizet 氏に感謝します)オーバーライドしても意味がないことがわかっているので、問題が発生target= args[3];しています。class ClientHandler3私はこの分野のプログラミングに不慣れで、あなたの助けが必要です。物事を理解するのを手伝ってください。ありがとうございました！
編集
import java.net.*;
import java.util.ArrayList;
import java.util.Scanner;
import java.util.StringTokenizer;
import java.io.*;
public class quotes {
public static InetAddress host;
public static ServerSocket serverSocket;
public static void main(String[] args) throws IOException {
if(args[0].equals("-c")){
Client(args);
}
else if(args[0].equals("-s")){
System.out.println("SERVER KA!!!");
Server(args);
}
}
@SuppressWarnings("resource")
public static void Client(String[] args) throws IOException
String hostname = args[1];
String target, response;
if(hostname.equals("localhost")) host = InetAddress.getLocalHost();
else host = InetAddress.getByName(hostname);
int port = Integer.parseInt(args[2]);
target = args[3];
Socket socket = new Socket(host, port);
Scanner input = new Scanner(System.in);
Scanner networkInput = new Scanner(socket.getInputStream());
PrintWriter networkOutput = new PrintWriter(socket.getOutputStream(), true);
// Set up stream from keyboard entry...
Scanner userEntry = new Scanner(System.in);
networkOutput.println(target);
response = networkInput.nextLine();
while(!response.equals("|")){
// Display server's response to user ...
System.out.println("\n " + response);
response = networkInput.nextLine();
}
}
public static void Server(String[] args) throws IOException {
int port = Integer.parseInt(args[1]);
String file = args[2];
String target = "";
serverSocket = new ServerSocket(port);
do {
// Wait for client...
Socket client = serverSocket.accept();
System.out.println("\nNew client accepted.\n");
ClientHandler3 handler = new ClientHandler3(client, file, target);
handler.start();
}while(true);
}
}
class ClientHandler3 extends Thread {
private Socket client;
private Scanner input;
private PrintWriter output;
private ArrayList<String> quotes;
private String target;
public ClientHandler3(Socket socket, String file, String target) {
// Set up reference to associated socket...
client = socket;
try {
BufferedReader buffer = new BufferedReader(new FileReader(file));
BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream()));
this.target = reader.readLine();
String line = reader.readLine();
try {
int ctr = 0;
quotes = new ArrayList<String>();
while(line != null){
quotes.add(ctr, line);
ctr++;
line = buffer.readLine();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
input = new Scanner(client.getInputStream());
output = new PrintWriter(client.getOutputStream(), true);
}
catch(IOException e) {
e.printStackTrace();
}
}
public void run() {
String message = "";
target= input.nextLine();
for(int i = 0; i<quotes.size(); i++){
if(quotes.get(i).toUpperCase().contains(target.toUpperCase())){
output.println(quotes.get(i));
}
}
output.println("|");
try {
if (client != null) {
System.out.println("Closing down connection...");
client.close();
}
}
catch(IOException e) {
System.out.println("Unable to disconnect!");
}
}
}