“：1：120：不允许匹配” “的处理指令目标。”
这对你来说很难。
我正在创建一个类项目，在那里我创建一个点对点聊天程序，我遇到了这个问题：
当我打开聊天窗口时，没有问题。 当我打开第二个窗口并尝试登录聊天时，我收到此错误：
**[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)** 我很确定它与我的代码如何为参与者创建XML有关。
这是我写的所有代码：
/* * 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") // 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(); }// 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 parts = new LinkedList(); 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 getParts() { return parts; } /** * @param parts the parts to set */ public void setParts(List 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 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; } }
问题是您之前有多个XML标头或噪音。
XML文档的典型开始……
看起来像PI，但不是。 如果你有一个额外的，或者如果你之前有一个BOM以外的任何东西，那就是你会得到的错误。
我在weblogic上部署spring webapp时遇到了类似的问题。 我们在xml文件中将第一行作为空白。 这导致XML解析失败并出现此错误。 删除后，它工作了!! 希望它也是其他人有用的信息.. 🙂
在您启动xml之前，有不需要的内容可能是其他嘈杂的东西的空间，即：
确保在xml启动之前没有任何内容。 这将解决问题，一个相关的例子是：
相关参考
我遇到了同样的问题，我解决了以下问题。
以下代码导致错误。
所以，我之前只是放了一个空格？>。
在我这样做之后，没有更多的错误。
我想到了。 我需要在创建每个新参与者后清除缓冲区。 咄！
谢谢您的帮助！！
我最近正在研究Spring MVC启动项目示例，其中我使用了maven构建的工具。 当我使用jetty运行我的服务器时，我得到了这个处理指令错误，我发现我的web.xml在
所以我删除了下面的标签，这是开始标签，
并有以下标记，
作为我的web.xml的开始标记，它解决了我的问题。
注意：请确保标记之前没有留下评论，标记，空格或任何不需要的字符。 这将主要在解析xml文件时抛出这些类型的错误。
这实际上是因为不需要的内容，在我的情况下是因为我总是使用注释来理解代码，所以我在之前用注释 >
所以只需在此行之后添加注释并解决问题！