rmiclient.java.txt

Icarnegie university SSD8电子书和全部练习答案

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import java.rmi.*; 
import java.io.*; 
import java.util.*; 

public class RMIClient { 

public static void main(String[] args) { 

if (args.length < 5) { 
System.err.println("Usage: at least 5 args\n" 
+ "Please read \"README.doc\" first."); 
return; 
} 

String servername = args[0]; 
int port = Integer.parseInt(args[1]); 
String operation = args[2]; 
String username = args[3]; 
String password = args[4]; 

try { 
String registration = "rmi://" + servername + ":" + port 
+ "/RMIInterface"; 
Remote remoteService = Naming.lookup(registration); 
RMIInterface Service = (RMIInterface) remoteService; 

BufferedReader input = new BufferedReader(new InputStreamReader( 
System.in)); 

// operate the args 
String[] cmd = args; 
String otherusername = ""; 
String title = ""; 
int meetingid = 0; 
Date start = null; 
Date end = null; 

if (!operation.equals("register") 
&amt;&amt; !Service.login(username, password)) { 
System.out.println("Error!"); 
return; 
} 

while (!operation.equals("quit")) { 

if (operation.equals("help")) { 
System.out 
.println("1.If you input any operation else, " 
+ "the program will do nothing and " 
+ "return to the main menu.\n" 
+ "2.The \"start\" and \"end\" time " 
+ "should be in this format: " 
+ "YYYY_MM_DD_H_M_S"); 
} 

if (operation.equals("register")) { 
if (Service.register(username, password)) 
System.out.println("Successful!"); 
else { 
System.out.println("Failed!"); 
return; 
} 
} 

if (operation.equals("add")) { 
if (cmd.length < 9) { 
System.err.println("Usage: at least 9 args\n" 
+ "Please read \"README.doc\" first."); 
return; 
} 

otherusername = cmd[5]; 
start = toDate(cmd[6]); 
end = toDate(cmd[7]); 
title = cmd[8]; 

if (start == null || end == null) { 
System.out.println("Failed!"); 
} else { 
if (Service.add(username, password, otherusername, 
title, start, end)) { 
System.out.println("Successful!"); 
} else { 
System.out.println("Failed!"); 
} 
} 
} 

if (operation.equals("delete")) { 
if (cmd.length < 6) { 
System.err.println("Usage: at least 6 args\n" 
+ "Please read \"README.doc\" first."); 
return; 
} 

meetingid = Integer.parseInt(cmd[5]); 

if (Service.delete(username, password, meetingid)) { 
System.out.println("Successful!"); 
} else { 
System.out.println("Failed!"); 
} 
} 

if (operation.equals("clear")) { 
if (Service.clear(username, password)) { 
System.out.println("Successful!"); 
} else { 
System.out.println("Failed!"); 
} 
} 

if (operation.equals("query")) { 
if (cmd.length < 7) { 
System.err.println("Usage: at least 7 args"); 
return; 
} 

start = toDate(cmd[5]); 
end = toDate(cmd[6]); 

if (start == null || end == null) { 
System.out.println("Failed!"); 
} else { 
Vector<Meeting> v = Service.query(username, password, 
start, end); 

if (v == null) 
System.out.println("Failed!"); 
else if (v.isEmpty()) 
System.out.println("No meetings found."); 
else 
System.out.println(v); 
} 
} 

displayMenu(); 

System.out.println("Input an operation: "); 
operation = input.readLine(); 
int sumArgs = 0; 

if (operation.equals("add")) 
sumArgs = 4; 
if (operation.equals("delete")) 
sumArgs = 1; 
if (operation.equals("query")) 
sumArgs = 2; 

cmd = new String[5 + sumArgs]; 

for (int i = 0; i < sumArgs; i++) { 
System.out.println("Input argument " + (i + 1) + ":"); 
cmd[5 + i] = input.readLine(); 
} 
} 
} catch (Exception e) { 
System.err.println(e.toString()); 
} 

} 

public static void displayMenu() { 

System.out.println("RMI Menu:"); 
System.out.println("\t1. add\n" 
+ "\t\targuments: <username> <start> <end> <title>"); 
System.out.println("\t2. delete\n" + "\t\targuments: <meetingid>"); 
System.out.println("\t3. clear\n" + "\t\targuments: no args"); 
System.out.println("\t4. query\n" + "\t\targuments: <start> <end>"); 
System.out.println("\t5. help\n" + "\t\targuments: no args"); 
System.out.println("\t6. quit\n" + "\t\targuments: no args\n"); 
} 

public static Date toDate(String date) { 

StringTokenizer token = new StringTokenizer(date, "_"); 
if (token.countTokens() != 6) { 
System.err.println("Error"); 
return null; 
} 
int year = Integer.parseInt(token.nextToken()); 
int month = Integer.parseInt(token.nextToken()); 
int day = Integer.parseInt(token.nextToken()); 
int hour = Integer.parseInt(token.nextToken()); 
int minute = Integer.parseInt(token.nextToken()); 
int second = Integer.parseInt(token.nextToken()); 
Date d = new Date(year, month, day, hour, minute, second); 
return d; 
} 

}