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Đây là một trong những khó khăn cho bạn."[Lỗi nghiêm trọng]: 1: 120: Không cho phép mục tiêu lệnh xử lý khớp" [xX] [mM] [lL] ".
tôi đang làm việc trên một dự án lớp học, nơi tôi có thể tạo một chương trình chat peer-to-peer và tôi có vấn đề này:
Khi tôi mở ra một cửa sổ chat, không có vấn đề. Khi tôi mở cửa sổ thứ hai và thử đăng nhập vào cuộc trò chuyện, tôi gặp phải lỗi này:
**[Fatal Error] :1:120: The processing instruction target matching "[xX][mM][lL]" is not allowed.
org.xml.sax.SAXParseException: The processing instruction target matching "[xX][mM][lL]" is not allowed.
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:249)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:284)
at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:124)
at chatter2.Chatter.process(Chatter.java:240)
at chatter2.Chatter.run(Chatter.java:222)
at java.lang.Thread.run(Thread.java:680)**
Tôi khá chắc chắn rằng nó có liên quan đến cách mã của tôi đang tạo XML cho người tham gia.
Dưới đây là tất cả các mã tôi đã viết:
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/*
* NewJFrame.java
*
* Created on Nov 10, 2010, 2:11:39 PM
*/
package chatter2;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.StringBufferInputStream;
import java.io.StringReader;
import java.net.Socket;
import java.util.LinkedList;
import java.util.List;
import javax.swing.DefaultListModel;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.xml.sax.InputSource;
/**
*
* @author ericrea
*/
public class Chatter extends javax.swing.JFrame implements Runnable {
PrintWriter out = null;
BufferedReader in = null;
boolean running = true;
String partName = "";
String chatHist = "";
/** Creates new form NewJFrame */
public Chatter() {
initComponents();
Server server = new Server();
server.start();
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
msgText = new javax.swing.JTextArea();
send = new javax.swing.JButton();
jPanel2 = new javax.swing.JPanel();
chatText = new javax.swing.JTextArea();
jPanel3 = new javax.swing.JPanel();
userName = new javax.swing.JTextField();
IPaddress = new javax.swing.JTextField();
PortField = new javax.swing.JTextField();
Login = new javax.swing.JButton();
jButton1 = new javax.swing.JButton();
jPanel4 = new javax.swing.JPanel();
chatMembers = new javax.swing.JList();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setMinimumSize(new java.awt.Dimension(550, 550));
jPanel1.setLayout(new java.awt.GridLayout(1, 0));
msgText.setColumns(20);
msgText.setRows(5);
msgText.setPreferredSize(new java.awt.Dimension(240, 24));
msgText.setRequestFocusEnabled(false);
jPanel1.add(msgText);
send.setText("Send");
send.setPreferredSize(new java.awt.Dimension(100, 29));
send.setRolloverEnabled(true);
send.setSelected(true);
send.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
sendActionPerformed(evt);
}
});
jPanel1.add(send);
getContentPane().add(jPanel1, java.awt.BorderLayout.PAGE_END);
jPanel2.setLayout(new java.awt.GridLayout(1, 0));
chatText.setBackground(new java.awt.Color(0, 255, 204));
chatText.setColumns(20);
chatText.setRows(5);
jPanel2.add(chatText);
getContentPane().add(jPanel2, java.awt.BorderLayout.LINE_END);
jPanel3.setLayout(new java.awt.GridLayout(1, 0));
userName.setText("UserName");
jPanel3.add(userName);
IPaddress.setText("127.0.0.1");
IPaddress.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
IPaddressActionPerformed(evt);
}
});
jPanel3.add(IPaddress);
PortField.setText("44640");
jPanel3.add(PortField);
Login.setText("Login");
Login.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
LoginActionPerformed(evt);
}
});
jPanel3.add(Login);
jButton1.setText("Logout");
jPanel3.add(jButton1);
getContentPane().add(jPanel3, java.awt.BorderLayout.PAGE_START);
chatMembers.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
chatMembers.setModel(new javax.swing.AbstractListModel() {
String[] strings = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5" };
public int getSize() { return strings.length; }
public Object getElementAt(int i) { return strings[i]; }
});
chatMembers.setPreferredSize(new java.awt.Dimension(80, 87));
jPanel4.add(chatMembers);
getContentPane().add(jPanel4, java.awt.BorderLayout.LINE_START);
pack();
}// </editor-fold>
private void LoginActionPerformed(java.awt.event.ActionEvent evt) {
try {
Socket s = new Socket(IPaddress.getText(), Integer.parseInt(PortField.getText()));
out = new PrintWriter(s.getOutputStream());
in = new BufferedReader(new InputStreamReader(s.getInputStream()));
new Thread(this).start();
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = factory.newDocumentBuilder();
Document doc = docBuilder.newDocument();
Element root = doc.createElement("login");
doc.appendChild(root);
root.appendChild(doc.createTextNode(userName.getText()));
TransformerFactory fact = TransformerFactory.newInstance();
Transformer trans = fact.newTransformer();
DOMSource source = new DOMSource(doc);
StreamResult sResult = new StreamResult(out);
trans.transform(source, sResult);
out.println("\n");
out.flush();
} catch (Exception e) {
}
}
private void IPaddressActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void sendActionPerformed(java.awt.event.ActionEvent evt) {
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Chatter().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JTextField IPaddress;
private javax.swing.JButton Login;
private javax.swing.JTextField PortField;
private javax.swing.JList chatMembers;
private javax.swing.JTextArea chatText;
private javax.swing.JButton jButton1;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JPanel jPanel3;
private javax.swing.JPanel jPanel4;
private javax.swing.JTextArea msgText;
private javax.swing.JButton send;
private javax.swing.JTextField userName;
// End of variables declaration
public void run() {
String buffer = "";
while (running) {
try {
String line = in.readLine();
System.out.println(line);
if (line.equals("")) {
process(buffer);
} else {
buffer = buffer + line;
}
} catch (Exception e) {
}
}
}
public void process(String buffer) {
try {
System.out.println("buffer in process is " + buffer);
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = factory.newDocumentBuilder();
Document doc = docBuilder.parse(new StringBufferInputStream(buffer)); //new InputSource(new StringReader(buffer))
Element root = doc.getDocumentElement();
if (root.getNodeName().equals("message")) {
chatHist = chatHist + root.getTextContent() + "\n";
newMessage();
}
else if (root.getNodeName().equals("participants")) {
DefaultListModel partNames = new DefaultListModel();
for(int i = 0; i < root.getChildNodes().getLength(); i++){
//partName = partName + root.getChildNodes().item(i).getTextContent() + "/n";
partNames.addElement(root.getChildNodes().item(i).getTextContent());
}
chatMembers.setModel(partNames);
}
} catch (Exception e) {e.printStackTrace();
}
}
public void cleanStop() {
}
public void newMessage() {
chatText.setText(chatHist);
}
}
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package chatter2;
import java.io.*;
import java.net.*;
import java.util.LinkedList;
import java.util.List;
import org.w3c.dom.Document;
/**
*
* @author ericrea
*/
public class Server extends Thread {
private ServerSocket ss = null;
private List<Participant> parts = new LinkedList<Participant>();
public Server(){
try{
ss = new ServerSocket(44640);
}catch(Exception e){e.printStackTrace();
}
}
@Override
public void run() {
//add this into a while loop
while (true){
try{
Socket s = ss.accept();
Participant p = new Participant(this, s);
p.start();
getParts().add(p);
}
catch(Exception e){
e.printStackTrace();}
// System.out.println(" Got a client socket connection");
// PrintWriter out = new PrintWriter(s.getOutputStream());
// BufferedReader in = new BufferedReader(new InputStreamReader(s.getInputStream()));
// out.println("hey there, want to chat");
// out.flush();
// String line = in.readLine();
// System.out.println("Client said: " + line);
}
}
public void message(Document doc){
for (Participant p: getParts()){
p.newMessage(doc);
}
}
public void newParticipants(){
int counter = 1;
for(Participant p: getParts()){
//System.out.println(counter + " time through the loop");
counter++;
p.newParticipant();
}
}
public void cleanStop(){
}
public void logout(Participant p){
parts.remove(p);
newParticipants();
}
/**
* @return the ss
*/
public ServerSocket getSs() {
return ss;
}
/**
* @param ss the ss to set
*/
public void setSs(ServerSocket ss) {
this.ss = ss;
}
/**
* @return the parts
*/
public List<Participant> getParts() {
return parts;
}
/**
* @param parts the parts to set
*/
public void setParts(List<Participant> parts) {
this.parts = parts;
}
}
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package chatter2;
import java.io.*;
import java.util.*;
import java.net.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.xml.sax.InputSource;
/**
*
* @author ericrea
*/
public class Participant extends Thread {
Server server = null;
Socket client = null;
PrintWriter out = null;
BufferedReader in = null;
boolean running = true;
private String partName = null;
public Participant(Server server, Socket client) throws IOException {
this.client = client;
this.server = server;
out = new PrintWriter(client.getOutputStream());
in = new BufferedReader(new InputStreamReader(client.getInputStream()));
}
//run and actONMessage will be in the chatter class as well
@Override
public void run() {
String buffer = "";
while (running) {
try {
String line = in.readLine();
if (line.equals("")) {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = factory.newDocumentBuilder();
Document doc = docBuilder.parse(new InputSource(new StringReader(buffer)));
actOnMessage(doc);
} else {
buffer = buffer + line;
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
public void actOnMessage(Document doc) {
Element root = doc.getDocumentElement();
if (root.getNodeName().equals("login")) {
setPartName(root.getTextContent());
this.login();
} else if (root.getNodeName().equals("message")) {
message(doc);
} else if (root.getNodeName().equals("logout")) {
this.logout();
}
}
public void message(Document doc) {
server.message(doc);
}
public void login() {
server.newParticipants();
}
public void logout() {
server.logout(this);
}
public void newMessage(Document doc) {
out.println(/*String version of the xml*/);
}
public void newParticipant() {
try {
List<Participant> partList = server.getParts();
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = factory.newDocumentBuilder();
Document doc = docBuilder.newDocument();
Element root = doc.createElement("participants");
doc.appendChild(root);
for (Participant k : partList) {
Element root1 = doc.createElement("participant");
root.appendChild(root1);
root1.appendChild(doc.createTextNode(k.getPartName()));
}
TransformerFactory fact = TransformerFactory.newInstance();
Transformer trans = fact.newTransformer();
DOMSource source = new DOMSource(doc);
StreamResult sResult = new StreamResult(out);
trans.transform(source, sResult);
out.println("\n");
out.flush();
} catch (Exception e) {
}
}
public void cleanStop() {
}
public void getParticipantName() {
}
/**
* @return the partName
*/
public String getPartName() {
return partName;
}
/**
* @param partName the partName to set
*/
public void setPartName(String partName) {
this.partName = partName;
}
}
Lỗi xảy ra trong gói chatter2 bạn đã bao gồm; chúng tôi không biết điều gì đang làm, việc xem mã của bạn không liên quan. – BeemerGuy
Chatter2 là tên dự án. – novicePrgrmr
Độ phân giải của mỗi * ba * nguyên nhân có thể có của thông báo lỗi này được đề cập [** here **] (http://stackoverflow.com/a/19898942/290085). – kjhughes