为什么client和server之间的通讯一直不能成功（看原码）在线等待``

Question

server端不能那样写吧。肯定要通过线程来实现客户端的链接

Answer 1

String line = in.readLine();改为：
// 等待客户端的输入
        char[] buffer = new char[1024];
        int lineSize = in.read(buffer);
        String clientString = new String(buffer, 0, lineSize - 1);
        System.out.println("The client command string is:" + clientString);试试

Answer 2

public static void main(String[] args){
new Server();
-------------------^^^^^^^^^^^换成Server server1=new Server();
}Client也一样

Answer 3

一个oracle 的事例import java.net.*;
import java.io.*;
import java.sql.*;
public class Server {

public static void main(String[] args){
ServerSocket serverSocket;
Socket clientSocket;
BufferedReader br;
PrintStream ps;
String username,password,email,homepage,money,outString,sql;
String url="jdbc:oracle:oci8:@oracledb";

try{
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection con=DriverManager.getConnection(url,"scott","tiger");
Statement stmt=con.createStatement();

serverSocket=new ServerSocket(8888);
clientSocket=serverSocket.accept();

br=new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
ps=new PrintStream(clientSocket.getOutputStream());

username=br.readLine();
outString="\t\t\t\t\t你输入的姓名是:"+username;
ps.println(outString);
ps.flush();

password=br.readLine();
outString="\t\t\t\t\t你输入的密码是:"+password;
ps.println(outString);
ps.flush();

email=br.readLine();
outString="\t\t\t\t\t你输入的电子邮件地址是:"+email;
ps.println(outString);
ps.flush();

homepage=br.readLine();
outString="\t\t\t\t\t你输入的主页是:"+homepage;
ps.println(outString);
ps.flush();

money=br.readLine();
outString="\t\t\t\t\t你输入的金额是:"+money;
ps.println(outString);
ps.flush();

sql="insert into userinfo values(\'"+username+"\',\'"+
                                 password+"\',\'"+
                                 email+"\',\'"+
                                 homepage+"\',"+
                                 "sysdate,"+
                                 money+")";
int ret=stmt.executeUpdate(sql);

br.close();
ps.close();
stmt.close();
con.close();
serverSocket.close();
clientSocket.close();

}catch (Exception e){
System.out.println(e);
}
   }
}
import java.net.*;
import java.io.*;
public class Client{
 
public static void main(String[] args){

Socket clientSocket;
BufferedReader br1,br2;
PrintStream ps;
String username,password,email,homepage,money,inString;

try{
clientSocket=new Socket("localhost",8888);

br1=new BufferedReader(new InputStreamReader(System.in));
br2=new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
ps =new PrintStream(clientSocket.getOutputStream());

System.out.println("请输入用户姓名(必须项,最多20个字符):");
username=br1.readLine();
ps.println(username);
ps.flush();

inString=br2.readLine();
System.out.println(inString);

System.out.print("请输入密码(必须项,最多20个字符):");
password=br1.readLine();
ps.println(password);
ps.flush();

inString=br2.readLine();
System.out.println(inString);

System.out.print("请输入电子邮件地址(最多30个字符):");
email=br1.readLine();
ps.println(email);
ps.flush();

inString=br2.readLine();
System.out.println(inString);

System.out.print("请输入个人主页(最多50个字符):");
homepage=br1.readLine();
ps.println(homepage);
ps.flush();

inString=br2.readLine();
System.out.println(inString);

System.out.print("请输入金额(必须项,只能是数字):");
money=br1.readLine();
ps.println(money);
ps.flush();

inString=br2.readLine();
System.out.println(inString);

br1.close();
br2.close();
ps.close();

clientSocket.close();

   }catch(Exception e){
    System.out.println(e);
   }
}
}数据库结构
CREATE TABLE useinfo
(
   username varchar2(20) not null primary key,
   password varchar2(20) not null,
   email varchar2(30),
   homepage varchar2(50),
   regtime date,
   money number(10)
);
commit;
exit;