Java：客户端/服务器问题
实际问题是： 开发一个计算员工薪酬的客户机/服务器应用程序。 有些员工是永久性的，有些是临时性的 永久雇员有固定的年薪，有资格享受病假和年假 临时雇员按实际工作时间按小时计酬 雇员每两周领一次工资 应用程序的客户端是收集有关员工的信息，并将其发送到服务器，服务器将计算总工资、已缴税款和净工资 此信息将发送回要显示的客户端 客户端界面GUI，允许用户在永久或临时之间进行选择。如果是永久性的，则要求用户输入员工姓名、身份证号码、年薪以及休假下拉列表，默认为“无”，但可以选择“年假”或“病假”。如果选择其中一个，则会询问用户需要多少天 如果是临时工，则输入员工姓名、身份证号码、工资率和工作时间。这两类员工的计税公式相同。这些数字是每两周一次 第一个700美元是免税的，任何收入超过700美元到1500美元的都要按每美元19美分的税率纳税，任何超过1500美元的都要按每美元38美分的税率纳税。应用程序包括数据验证。这应该在数据发送到服务器之前完成。所有数字输入应大于0，临时工的工作小时数必须为5小时或以上且小于72小时。应向用户显示一条消息，然后用户应能够重新输入数据 我尽了最大努力，有人或任何人能让这件事变得简单吗？因为我花了好几个小时、好几个小时、好几个小时、好几个小时，它有问题： 服务器：Java：客户端/服务器问题,java,button,textfield,windowbuilder,Java,Button,Textfield,Windowbuilder,实际问题是： 开发一个计算员工薪酬的客户机/服务器应用程序。 有些员工是永久性的，有些是临时性的 永久雇员有固定的年薪，有资格享受病假和年假 临时雇员按实际工作时间按小时计酬 雇员每两周领一次工资 应用程序的客户端是收集有关员工的信息，并将其发送到服务器，服务器将计算总工资、已缴税款和净工资 此信息将发送回要显示的客户端 客户端界面GUI，允许用户在永久或临时之间进行选择。如果是永久性的，则要求用户输入员工姓名、身份证号码、年薪以及休假下拉列表，默认为“无”，但可以选择“年假”或“病假”。如果选
package com.test;
import java.io.*;
import java.net.*;
import java.util.*;
import java.awt.*;
import javax.swing.*;
public class PizzaPayServer extends JFrame
{
/**
*
*/
private static final long serialVersionUID = 1L;
//Text area for displaying contents
private JTextArea jta = new JTextArea();
public PizzaPayServer()
{
//Place text area on the frame
getContentPane().setLayout(new BorderLayout());
getContentPane().add(new JScrollPane(jta), BorderLayout.CENTER);
setTitle("PizzaPayServer");
setSize(500, 300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true); // It is necessary to show the frame here!
}
public static void main(String[] args)
{
ServerSocket serverSocket;
Socket socket;
DataInputStream inputFromClient;
DataOutputStream outputToClient;
String empname;
int empid;
double hours;
double payrate;
double salary;
double grossPay;
double netPay;
double tax;
PizzaPayServer theServer = new PizzaPayServer();
try
{
// Create a server socket
serverSocket = new ServerSocket(8010);
theServer.jta.append("Server started at " + new Date() + '\n');
//Listen for a connection request
socket = serverSocket.accept();
//Create data input and output streams
inputFromClient = new DataInputStream(socket.getInputStream());
outputToClient = new DataOutputStream(socket.getOutputStream());
while (true)
{
hours=0;
payrate=0;
//Receive employee name from client
empname = inputFromClient.readUTF();
//Receive employee id from client
empid = inputFromClient.readInt();
//Receive payrate from client
//Receive hours from client
tax=0;
netPay=0;
salary=0;
String[] parts = empname.split(",");
String part1 = parts[0];
String part2 = parts[1];
if (part2.equals("c")){
payrate = inputFromClient.readDouble();
hours = inputFromClient.readDouble();
//Compute pay
grossPay = payrate * hours;
if(grossPay<=700)
tax=0;
else
if(grossPay<=1500)
tax=(grossPay-700) *0.19;
else
tax=((grossPay-1500) *0.38) + (800 *0.19);
netPay= grossPay-tax;
//Send pay back to client
outputToClient.writeDouble(netPay);
outputToClient.writeUTF(empname);
outputToClient.writeInt(empid);
theServer.jta.append("Employee Name recieved from client: " + part1 + '\n');
theServer.jta.append("Employee ID recieved from client: " + empid + '\n');
theServer.jta.append("Payrate recieved from client: " + payrate + '\n');
theServer.jta.append("Hours recieved from client: " + hours + '\n');
theServer.jta.append("Pay Calculated and Sent: " + netPay + '\n');
}
//perminPayClient Method
if (part2.equals("p")){
payrate = inputFromClient.readDouble();
//Compute pay
salary=payrate;
if(salary<=700)
tax=0;
else
if(salary<=1500)
tax=(salary-700) *0.19;
else
tax=((salary-1500) *0.38) + (800 *0.19);
netPay= salary/26 -tax;
//Send pay back to client
outputToClient.writeDouble(salary);
outputToClient.writeUTF(empname);
outputToClient.writeInt(empid);
theServer.jta.append("Employee Name recieved from client: " + part1 + '\n');
theServer.jta.append("Employee ID recieved from client: " + empid + '\n');
theServer.jta.append("Salary recieved from client: " + salary + '\n');
theServer.jta.append("Pay Calculated and Sent: " + netPay + '\n');
}
}
}
catch(IOException ex)
{
System.err.println("Catch While");
}
System.exit(0);
}}
package com.test;
import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class PizzaPayClient extends JFrame implements ActionListener
{
/**
*
*/
//Variables
private static final long serialVersionUID = 1L;
//Text fields for receiving employee name, employee id, payrate, hours
private JTextField jtfEname = new JTextField();
private JTextField jtfEid = new JTextField();
private JTextField jtfPayRate = new JTextField();
//Buttons for onClick Listeners
private JButton calculate = new JButton("Calculate Pay");
private JButton clear = new JButton("Clear");
private JButton exit = new JButton("Exit");
// IO Streams
private DataOutputStream outputToServer;
private DataInputStream inputFromServer;
private Socket sock;
private LayoutManager FlowLayout;
private final JTextField jtfHours = new JTextField();
private final JTextArea jta = new JTextArea();
private final JLabel lblNewLabel = new JLabel("New label");
public PizzaPayClient()
{
// Panel p to hold the label and text field
jtfHours.setHorizontalAlignment(SwingConstants.LEFT);
jtfHours.setBounds(134, 84, 140, 20);
jtfHours.setColumns(10);
JPanel p = new JPanel();
p.setBackground(new Color(255, 255, 102));
p.setBounds(0, 0, 501, 453);
p.setLayout(FlowLayout);
p.setLayout(null);
p.setLayout(null);
p.setLayout(null);
p.setLayout(null);
p.setLayout(null);
JLabel lblEmpName = new JLabel("Employee Name:");
lblEmpName.setFont(new Font("Tahoma", Font.BOLD, 12));
lblEmpName.setBounds(9, 9, 103, 14);
p.add(lblEmpName);
exit.setFont(new Font("Tahoma", Font.BOLD, 12));
exit.setBounds(376, 126, 108, 23);
p.add(exit);
exit.addActionListener(this);
JLabel lblEmpId = new JLabel("Employee ID:");
lblEmpId.setFont(new Font("Tahoma", Font.BOLD, 12));
lblEmpId.setBounds(10, 37, 102, 14);
p.add(lblEmpId);
jtfEid.setBounds(134, 34, 140, 20);
p.add(jtfEid);
JLabel lblPayRate = new JLabel("Enter PayRate:");
lblPayRate.setFont(new Font("Tahoma", Font.BOLD, 12));
lblPayRate.setBounds(9, 62, 103, 14);
p.add(lblPayRate);
jtfPayRate.setBounds(133, 59, 141, 20);
p.add(jtfPayRate);
jtfPayRate.setHorizontalAlignment(SwingConstants.LEFT);
jtfPayRate.addActionListener(this);
jtfEname.setBounds(134, 6, 140, 20);
p.add(jtfEname);
jtfEname.setHorizontalAlignment(SwingConstants.LEFT);
// Register Listener/s
jtfEname.addActionListener(this);
getContentPane().setLayout(null);
JLabel lblHours = new JLabel("Enter Hours:");
lblHours.setFont(new Font("Tahoma", Font.BOLD, 12));
lblHours.setBounds(9, 87, 103, 14);
p.add(lblHours);
calculate.setFont(new Font("Tahoma", Font.BOLD, 12));
calculate.setBounds(73, 126, 180, 23);
p.add(calculate);
clear.setFont(new Font("Tahoma", Font.BOLD, 12));
clear.setBounds(263, 126, 103, 23);
p.add(clear);
jtfEid.setHorizontalAlignment(SwingConstants.LEFT);
getContentPane().add(p);
p.add(jtfHours);
jta.setLineWrap(true);
jta.setRows(20);
jta.setBounds(10, 160, 480, 282);
p.add(jta);
lblNewLabel.setIcon(new ImageIcon("C:\\Users\\Little Beast\\workspace\\PizzaPaySystem\\pizzaplace2.jpg"));
lblNewLabel.setBounds(298, 9, 192, 106);
p.add(lblNewLabel);
jtfEid.addActionListener(this);
calculate.addActionListener(this);
clear.addActionListener(this);
setTitle("Casual Pay Entry");
setSize(517, 491);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true); // It is necessary to show the frame here!
try
{
//Create a socket to connect to the server
sock = new Socket("localhost", 8010);
//Create an input stream to receive data from the server
inputFromServer = new DataInputStream(sock.getInputStream());
//Create an output stream to send data to the server
outputToServer = new DataOutputStream(sock.getOutputStream());
}
catch (IOException ex)
{
jta.append(ex.toString() + '\n');
}
}
/**
* @param args
*/
public static void main(String[] args)
{
new PizzaPayClient();
}
public void actionPerformed(ActionEvent e) {
//String actionCommmand = e.getActionCommand();
if (e.getSource().equals(calculate)) {
try {
//Get the employee name, employee id, payrate, hours from the text fields
String empname = jtfEname.getText();
//If no name is entered display pop up dialog box.
if(empname.length()==0)
JOptionPane.showMessageDialog(null, "Please Enter Your Name");
int empid = 0;
try {
empid = Integer.parseInt(jtfEid.getText().trim());
//If no employee Id is entered display pop up dialog box
} catch(NumberFormatException nfe) {
JOptionPane.showMessageDialog(null, "Please Enter Your Id");
}
double payrate = 0;
try {
payrate = Double.parseDouble(jtfPayRate.getText().trim());
//If no payrate is entered display pop up dialog box
} catch (NumberFormatException nfe) {
JOptionPane.showMessageDialog(null, "Please Enter Your Pay Rate");
}
double hours = 0;
try {
hours = Double.parseDouble(jtfHours.getText().trim());
//If hours are less than 5 or over 72 display pop up dialog box
if(hours <5)
JOptionPane.showMessageDialog(null, "Must be 5 hours or greater");
if(hours >72)
JOptionPane.showMessageDialog(null, "Hours must be less than 72");
//If no hours are entered display pop up dialog box
} catch (NumberFormatException nfe) {
JOptionPane.showMessageDialog(null, "Please Enter Your Hours");
}
String oldName=empname;
//send the employee name, employee id, payrate, hours to the server
outputToServer.writeUTF(empname+",c");
outputToServer.writeInt(empid);
outputToServer.writeDouble(hours);
outputToServer.writeDouble(payrate);
outputToServer.flush();
//Get pay from the server
double pay = inputFromServer.readDouble();
empname = inputFromServer.readUTF();
//Display to the text area
jta.append("Name " + oldName + '\n');
jta.append("ID " + empid + '\n');
jta.append("PayRate is " + payrate + '\n');
jta.append("Hours is " + hours + '\n');
jta.append("Total Pay "
+ pay + '\n');
jtfEname.setText("");
jtfEid.setText("");
jtfPayRate.setText("");
jtfHours.setText("");
}
catch (IOException ex) {
System.err.println(ex);
}
}
//Clear the fields - reset
else if (e.getSource() == clear)
{
jta.setText("");
}
else if (e.getSource() == exit)
{
try
{
System.exit(0);
sock.close();
}
catch (Exception ex)
{
System.out.println("Client: exception " + ex);
}
}
}
}
我不确定到底是怎么回事，但我看到的一件事是你的状况：
if (e.getSource() == calculate) {
...
} else if (e.getSource() == clear) { //change it to else if since every click only comes from one source.
...
} else if (e.getSource() == exit)
是
计算清除退出我听说==非常弱，只适合比较int值。在大多数其他情况下，您应该始终使用.equals（）对不起，我不能写评论回复，因为我对这个网站太陌生了。
它看起来像是在actionPerformed for calculate中检查验证，但仍然附加数据。我认为您可能需要围绕数据的附加来包装验证代码。从我看到的情况来看，您可以检查是否输入了用户输入，如果用户没有输入，则相应地提示用户，然后在所有检查之后，它只是附加了任何方式。我理解得对吗？您有一个清除输入字段的清除按钮吗？但是当在designer视图中单击它时，它会显示上面的代码？当我双击designer视图中的clear按钮对执行的操作进行编码时，它会将我带到源代码的这一部分。我在底部靠近退出代码的地方手动添加了清除代码，它确实清除了字段。但是，当我重新输入姓名、id等并再次单击“计算”时，它崩溃了。这是否意味着您只有三个按钮的一个方法？是的，出于某种原因，当没有在文本字段中输入数据以计算jta（JtextArea）时，也是如此验证在消息对话框中出现，无需担心。但是，当您按下ok时，数据仍然存在，并且计算不会将textfields和jtextarea重置为blankyes，并且出于某种原因，我仍然尝试了此操作。这是输出屏幕第一次正常工作；名称chris ID 76 PayRate是10.0小时是10.0总工资100.0我单击“清除”将字段重置为空白，然后重新输入，这是第二次输出和程序崩溃：名称tom ID 88 PayRate是12.0小时是13.0总工资1.6180540078E-312，然后我再次按“清除”重新输入详细信息单击“计算”并崩溃请将堆栈跟踪添加到你的问题让我知道我们确实出了问题。它只是冻结了所有的堆栈跟踪：java.io.UTFDataFormatException:字节2附近的输入格式错误谢谢你我已经发布了我的完整代码，但是仍然有问题。基本上，我输入详细信息，点击计算，它工作正常，然后我点击清除，清除文本字段和文本区域，重新输入详细信息，点击计算，它给我一个奇怪的总工资数字。最后我再次单击“清除”，它会清除字段，我重新输入详细信息并单击“计算”，它将冻结/崩溃。我重新发布了问题和我的代码，如果有人能使这项工作出色，因为我一直遇到问题谢谢你，我会检查它。其他人建议你不能在套接字中附加多个，因此它会崩溃。如何进行包装验证？耶，我现在可以发表评论了！呵呵，一切都好。我读错了你的一些代码，你的try/catch应该能捕捉到任何缺失的输入。这太疯狂了，它一直在严重地融合我……我甚至尝试从头开始重新创建它。我已经尽了最大的努力，我知道一个接一个的代码，但是一起实现它有点让人困惑。我想也是因为缺乏插座知识。我做得还可以，虽然这是一个班级项目，我们获得的信息和知识有限，并被要求外包。我已经回复了实际问题，也许这会有所帮助，我所知道的一切都糟透了，我用我所知道的知识尝试了又尝试，并且走到了这一步，但是的，肯定有一个更简单的方法…如果有人能重现这个或使它变得简单，我将不胜感激
package com.test;
import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class PerminPayClient extends JFrame implements ActionListener
{
/**
*
*/
//Variables
private static final long serialVersionUID = 1L;
//Text fields for receiving employee name, employee id, payrate, hours
private JTextField jtfEname = new JTextField();
private JTextField jtfEid = new JTextField();
private JTextField jtfPayRate = new JTextField();
//Buttons for onClick Listeners
private JButton calculate = new JButton("Calculate Pay");
private JButton clear = new JButton("Clear");
private JButton exit = new JButton("Exit");
// IO Streams
private DataOutputStream outputToServer;
private DataInputStream inputFromServer;
private Socket sock;
private LayoutManager FlowLayout;
private final JTextArea jta = new JTextArea();
private final JLabel lblNewLabel = new JLabel("New label");
public PerminPayClient()
{
JPanel p = new JPanel();
p.setBackground(new Color(255, 255, 102));
p.setBounds(0, 0, 501, 453);
p.setLayout(FlowLayout);
p.setLayout(null);
p.setLayout(null);
p.setLayout(null);
p.setLayout(null);
p.setLayout(null);
JLabel lblEmpName = new JLabel("Employee Name:");
lblEmpName.setFont(new Font("Tahoma", Font.BOLD, 12));
lblEmpName.setBounds(9, 9, 103, 14);
p.add(lblEmpName);
exit.setFont(new Font("Tahoma", Font.BOLD, 12));
exit.setBounds(376, 126, 108, 23);
p.add(exit);
exit.addActionListener(this);
JLabel lblEmpId = new JLabel("Employee ID:");
lblEmpId.setFont(new Font("Tahoma", Font.BOLD, 12));
lblEmpId.setBounds(10, 37, 102, 14);
p.add(lblEmpId);
jtfEid.setBounds(134, 34, 140, 20);
p.add(jtfEid);
JLabel lblPayRate = new JLabel("Enter Salary:");
lblPayRate.setFont(new Font("Tahoma", Font.BOLD, 12));
lblPayRate.setBounds(9, 62, 103, 14);
p.add(lblPayRate);
jtfPayRate.setBounds(133, 59, 141, 20);
p.add(jtfPayRate);
jtfPayRate.setHorizontalAlignment(SwingConstants.LEFT);
jtfPayRate.addActionListener(this);
jtfEname.setBounds(134, 6, 140, 20);
p.add(jtfEname);
jtfEname.setHorizontalAlignment(SwingConstants.LEFT);
// Register Listener/s
jtfEname.addActionListener(this);
getContentPane().setLayout(null);
calculate.setFont(new Font("Tahoma", Font.BOLD, 12));
calculate.setBounds(73, 126, 180, 23);
p.add(calculate);
clear.setFont(new Font("Tahoma", Font.BOLD, 12));
clear.setBounds(263, 126, 103, 23);
p.add(clear);
jtfEid.setHorizontalAlignment(SwingConstants.LEFT);
getContentPane().add(p);
jta.setLineWrap(true);
jta.setRows(20);
jta.setBounds(10, 160, 480, 282);
p.add(jta);
lblNewLabel.setIcon(new ImageIcon("C:\\Users\\Little Beast\\workspace\\PizzaPaySystem\\pizzaplace2.jpg"));
lblNewLabel.setBounds(298, 9, 192, 106);
p.add(lblNewLabel);
jtfEid.addActionListener(this);
calculate.addActionListener(this);
clear.addActionListener(this);
setTitle("Casual Pay Entry");
setSize(517, 491);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true); // It is necessary to show the frame here!
try
{
//Create a socket to connect to the server
sock = new Socket("localhost", 8010);
//Create an input stream to receive data from the server
inputFromServer = new DataInputStream(sock.getInputStream());
//Create an output stream to send data to the server
outputToServer = new DataOutputStream(sock.getOutputStream());
}
catch (IOException ex)
{
jta.append(ex.toString() + '\n');
}
}
/**
* @param args
*/
public static void main(String[] args)
{
new PerminPayClient();
}
public void actionPerformed(ActionEvent e) {
//String actionCommmand = e.getActionCommand();
if (e.getSource().equals(calculate)) {
try {
//Get the Employee Name, Employee Id, Pay Rate(Salary) from the text fields
String empname = jtfEname.getText();
//If no Employee Name is entered display pop up dialog box.
if(empname.length()==0)
JOptionPane.showMessageDialog(null, "Please Enter Your Name");
int empid = 0;
try {
empid = Integer.parseInt(jtfEid.getText().trim());
//If no Employee Id is entered display pop up dialog box
} catch(NumberFormatException nfe) {
JOptionPane.showMessageDialog(null, "Please Enter Your Id");
}
double payrate = 0;
try {
payrate = Double.parseDouble(jtfPayRate.getText().trim());
//If no pay rate is entered display pop up dialog box
} catch (NumberFormatException nfe) {
JOptionPane.showMessageDialog(null, "Please Enter Your Annual Salary");
}
//send the Employee Name, Employee Id, Pay Rate to the server
String oldName=empname;
outputToServer.writeUTF(empname+",p");
outputToServer.writeInt(empid);
outputToServer.writeDouble(payrate);
outputToServer.flush();
//Get pay from the server
double pay = inputFromServer.readDouble();
empname = inputFromServer.readUTF();
//Display to the text area
jta.append("Name " + oldName + '\n');
jta.append("ID " + empid + '\n');
jta.append("Salary is " + payrate + '\n');
jta.append("Total Pay "
+ pay + '\n');
}
catch (IOException ex) {
System.err.println(ex);
}
}
//Clear the fields - reset
else if (e.getSource() == clear)
{
jtfEname.setText("");
jtfEid.setText("");
jtfPayRate.setText("");
jta.setText("");
}
//Button exit function to exit program
else if (e.getSource() == exit)
{
try
{
System.exit(0);
sock.close();
}
catch (Exception ex)
{
System.out.println("Client: exception " + ex);
}
}
}
}
if (e.getSource() == calculate) {
...
} else if (e.getSource() == clear) { //change it to else if since every click only comes from one source.
...
} else if (e.getSource() == exit)
if (e.getSource().equals(calculate)) {