我正在尝试建立一个客户端服务器架构，其中客户端将其硬件级别规范发送到服务器。但我无法在 GUI 上显示数据。服务器端正确接收客户端信息。
服务器代码
public class MyServer extends JFrame {
public void Show() throws IOException
{
ServerSocket ss=new ServerSocket(6666);
int count=0;
while(true)
{
Socket s=null;
try{
s=ss.accept();
SocketThread socketThread=new SocketThread(s,count);
socketThread.start();
}catch(Exception e)
{
s.close();
System.out.println(e);
}
finally {
count++;
}
}
}
}
class SocketThread extends Thread
{
// variables decleration
public SocketThread(Socket csocket,int count) {
this.csocket = csocket;
this.count=count;
}
public void run(){
try {
DataInputStream dis=new DataInputStream(csocket.getInputStream());
// Assigning the value to the variables
csocket.close();
dis.close();
ShowTable st=new ShowTable();
st.showdata(count,host, ip, os_name, os_arch, os_version, pro_detail, Mac_add, disk_size, max_memory);
}
catch(Exception e)
{
System.out.println("Server Problem");
System.out.println(e);
}
}
}
显示客户端信息的 GUI 代码
public class ShowTable extends JFrame{
JFrame f=new JFrame();
JTable jt=new JTable(new DefaultTableModel());
DefaultTableModel model=(DefaultTableModel)jt.getModel();
public void showdata(int count,String host,String ip,String os_name,String os_arch,
String os_version,String pro_detail,String Mac_add,float disk_size,float max_memory){
Object data[]={host,ip,os_name,os_arch,os_version,pro_detail,Mac_add,disk_size,max_memory};
if (count == 0)
{
model.addColumn("HOSTNAME");
model.addColumn("IP ADDRESS");
model.addColumn("OS NAME");
model.addColumn("OS ARCHITECTURE");
model.addColumn("OS VERSION");
model.addColumn("PROCESSOR DETAIL");
model.addColumn("MAC ADDRESS");
model.addColumn("HARD DISK");
model.addColumn("RAM SIZE");
model.addRow(data);
}
else
{
model.addRow(data);
}
jt.setBounds(30,40,200,300);
jt.setFocusable(false);
jt.setRowSelectionAllowed(false);
JScrollPane sp=new JScrollPane(jt);
f.add(sp);
f.setSize(1300,100);
f.setVisible(true);
}
public static void main(){
JScrollPane jScrollPane1;
JTable jTable1;
}
}
但是这个 Jframe 代码显示了一个空白框架所以任何人都可以帮我解决我做错的地方，因为它在控制台上显示输出。
最佳答案
Thank you Sir, Can you please provide me the code if possible as i am not able to do this
基本思想是，您只希望 JFrame 的一个实例存在，然后 SocketThread 的所有实例都应该引用该单个实例。
虽然有多种方法可以实现这一目标，但使用单例模式可能是最简单的一种
显示表
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
public enum ShowTable {
INSTANCE;
private JFrame f = new JFrame();
private JTable jt = new JTable(new DefaultTableModel());
private DefaultTableModel model = (DefaultTableModel) jt.getModel();
private ShowTable() {
jt.setBounds(30, 40, 200, 300);
jt.setFocusable(false);
jt.setRowSelectionAllowed(false);
JScrollPane sp = new JScrollPane(jt);
f.add(sp);
f.setSize(1300, 100);
}
public void showdata(int count, String host, String ip, String os_name, String os_arch,
String os_version, String pro_detail, String Mac_add, float disk_size, float max_memory) {
//System.out.println("Row :"+count);
Object data[] = {host, ip, os_name, os_arch, os_version, pro_detail, Mac_add, disk_size, max_memory};
if (count == 0) {
model.addColumn("HOSTNAME");
model.addColumn("IP ADDRESS");
model.addColumn("OS NAME");
model.addColumn("OS ARCHITECTURE");
model.addColumn("OS VERSION");
model.addColumn("PROCESSOR DETAIL");
model.addColumn("MAC ADDRESS");
model.addColumn("HARD DISK");
model.addColumn("RAM SIZE");
model.addRow(data);
} else {
model.addRow(data);
}
f.setVisible(true);
}
}
MyServer(和SocketThread)
导入java.awt.EventQueue; 导入java.io.DataInputStream； 导入java.io.IOException； 导入 java.net.ServerSocket; 导入java.net.Socket;
public class MyServer {
public static void main(String[] args) throws IOException {
new MyServer().Show();
}
public void Show() throws IOException {
ServerSocket ss = new ServerSocket(6666);
int count = 0;
while (true) {
Socket s = null;
try {
s = ss.accept();
SocketThread socketThread = new SocketThread(s, count);
socketThread.start();
} catch (Exception e) {
s.close();
System.out.println(e);
} finally {
count++;
}
}
}
class SocketThread extends Thread {
Socket csocket;
String ip = null;
String host = null;
String os_name = null;
String os_arch = null;
String os_version = null;
String pro_detail = null;
String Mac_add = null;
float disk_size = 0;
float max_memory = 0;
int count;
public SocketThread(Socket csocket, int count) {
this.csocket = csocket;
this.count = count;
}
public void run() {
try {
DataInputStream dis = new DataInputStream(csocket.getInputStream());
host = (String) dis.readUTF();
ip = (String) dis.readUTF();
os_name = (String) dis.readUTF();
os_arch = (String) dis.readUTF();
os_version = (String) dis.readUTF();
// pro_detail = (String) dis.readUTF();
Mac_add = (String) dis.readUTF();
disk_size = (long) (dis.readLong() / (1000000000));
max_memory = (long) (dis.readLong() / (1000000000));
csocket.close();
dis.close();
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
ShowTable.INSTANCE.showdata(count, host, ip, os_name, os_arch, os_version, pro_detail, Mac_add, disk_size, max_memory);
}
});
} catch (Exception e) {
System.out.println("Server Problem");
System.out.println(e);
}
}
}
}
MyClient
导入java.io.DataOutputStream; 导入java.io.File； 导入 java.lang.management.ManagementFactory; 导入 java.net.InetAddress; 导入 java.net.NetworkInterface; 导入java.net.Socket;
public class MyClient {
public static void main(String[] args) {
InetAddress ip;
try {
long diskSize = new File("C:").getTotalSpace() + new File("D:").getTotalSpace() + new File("E:").getTotalSpace();
long memorySize = ((com.sun.management.OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean()).getTotalPhysicalMemorySize();
ip = InetAddress.getLocalHost();
Socket s = new Socket("localhost", 6666);
DataOutputStream dout = new DataOutputStream(s.getOutputStream());
dout.writeUTF(ip.getHostName());
dout.writeUTF(ip.getHostAddress());
dout.writeUTF(System.getProperty("os.name"));
dout.writeUTF(System.getProperty("os.arch"));
dout.writeUTF(System.getProperty("os.version"));
// dout.writeUTF(System.getenv("processor_identifier"));
NetworkInterface network = NetworkInterface.getByInetAddress(ip);
StringBuilder sb = new StringBuilder();
byte[] mac = network.getHardwareAddress();
for (int i = 0; i < mac.length; i++) {
sb.append(String.format("%02X%s", mac[i], (i < mac.length - 1) ? "-" : ""));
}
dout.writeUTF(sb.toString());
dout.writeLong(diskSize);
dout.writeLong(memorySize);
dout.flush();
dout.close();
s.close();
} catch (Exception ex) {
System.out.println("Client");
System.out.println(ex);
}
}
}
关于java - 无法在Jtable上显示数据，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/49001055/