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我一直在寻找解决这个问题的办法，但是什么都没发现。我正在通过Java TCP/IP套接字创建一个简单的聊天对话框，并且我遇到了创建包含字母“åäö”的XML字符串的问题。解析Java StAX XML问题
可以说，我通过一个XMLObject与领域
名=“服务器”，颜色=“＃FF0000”文本=“AAO”
由分析器返回的产生的xmlString将
<?xml version="1.0"?><message sender="Server"><text color="#FF0000”>???</text></message>
åäö变成???。任何想法？谢谢！
**更新** 好的，所以我刚刚意识到从JTextArea获取文本时出现问题。
如果我运行此代码：
package self.edu.javaprojekt.view;
import self.edu.javaprojekt.model.XMLObject;
import self.edu.javaprojekt.model.XMLParser;
public class Test {
/**
* @param args
*/
public static void main(String[] args) {
XMLObject object = new XMLObject();
object.setColor("#FF0000");
object.setSender("Server");
object.setText("åäö");
String parsed = XMLParser.parse(object);
System.out.println(parsed);
System.out.println(XMLParser.parse(parsed));
}
}
我得到正确的结果：
<?xml version="1.0" encoding="UTF-8"?><message sender="Server"><text color="#FF0000">åäö</text></message>
XMLObject [sender=Server, text=åäö, color=#FF0000]
但随着文本区域。以下方法返回的文本被添加到一个XMLObject中，然后被发送用于解析。
public String readAndClearMessageArea() {
String text = messageTextArea.getText();
appendToPane("\n" + controller.getName() + ": " + text, controller.getColor());
messageTextArea.setText("");
return text;
}
我得到了奇怪的结果。任何新想法？谢谢！！
这是解析器
package self.edu.javaprojekt.model;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import java.util.Iterator;
import javax.xml.stream.XMLEventFactory;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLEventWriter;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.events.Attribute;
import javax.xml.stream.events.Characters;
import javax.xml.stream.events.EndElement;
import javax.xml.stream.events.StartDocument;
import javax.xml.stream.events.StartElement;
import javax.xml.stream.events.XMLEvent;
public class XMLParser {
public static final String MESSAGE_TAG = "message";
public static final String SENDER_TAG = "sender";
public static final String TEXT_TAG = "text";
public static final String COLOR_TAG = "color";
public static final String DISCONNECT_TAG = "disconnect";
public static final String ENCRYPTED_TAG = "encrypted";
public static final String ENCRYPTED_TYPE_TAG = "type";
public static final String KEY_REQUEST_TAG = "keyrequest";
public static String parse(XMLObject object) {
// create an XMLOutputFactory
XMLOutputFactory outputFactory = XMLOutputFactory.newInstance();
// create XMLEventWriter
XMLEventWriter eventWriter;
ByteArrayOutputStream out = new ByteArrayOutputStream();
String xmlString = "";
try {
eventWriter = outputFactory.createXMLEventWriter(out);
// create an EventFactory
XMLEventFactory eventFactory = XMLEventFactory.newInstance();
//XMLEvent end = eventFactory.createDTD("\n");
//XMLEvent tab = eventFactory.createDTD("\t");
// create and write Start Tag
StartDocument startDocument = eventFactory.createStartDocument("UTF-8");
eventWriter.add(startDocument);
// create message open tag
//eventWriter.add(end);
StartElement messageStartElement = eventFactory.createStartElement(
"", "", MESSAGE_TAG);
eventWriter.add(messageStartElement);
eventWriter.add(eventFactory.createAttribute(SENDER_TAG,
object.getSender()));
//eventWriter.add(end);
// create the text
//eventWriter.add(tab);
StartElement textStartElement = eventFactory.createStartElement("",
"", TEXT_TAG);
eventWriter.add(textStartElement);
eventWriter.add(eventFactory.createAttribute(COLOR_TAG,
object.getColor()));
Characters characters = eventFactory.createCharacters(object.getText());
eventWriter.add(characters);
//eventWriter.add(tab);
eventWriter.add(eventFactory.createEndElement("", "", TEXT_TAG));
//eventWriter.add(end);
eventWriter.add(eventFactory.createEndElement("", "", MESSAGE_TAG));
//eventWriter.add(end);
eventWriter.add(eventFactory.createEndDocument());
eventWriter.close();
xmlString = out.toString("UTF-8");
} catch (XMLStreamException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return xmlString;
}
@SuppressWarnings("unchecked")
public static XMLObject parse(String string) {
XMLObject object = null;
try {
// First, create a new XMLInputFactory
XMLInputFactory inputFactory = XMLInputFactory.newInstance();
// Setup a new eventReader
InputStream in;
if (!string.equals("")) {
in = new ByteArrayInputStream(Charset.forName("UTF-8")
.encode(string).array());
} else {
in = new FileInputStream("xmltest.txt");
}
XMLEventReader eventReader = inputFactory.createXMLEventReader(in);
// read the XML document
while (eventReader.hasNext()) {
XMLEvent event = eventReader.nextEvent();
if (event.isStartElement()) {
StartElement startElement = event.asStartElement();
// If we have a message
if (startElement.getName().getLocalPart()
.equals(MESSAGE_TAG)) {
object = new XMLObject();
// We read the attributes from this tag and add the
// sender
// attribute to our object
Iterator<Attribute> attributes = startElement
.getAttributes();
while (attributes.hasNext()) {
Attribute attribute = attributes.next();
if (attribute.getName().getLocalPart()
.equals(SENDER_TAG)) {
object.setSender(attribute.getValue());
}
}
}
if (startElement.getName().getLocalPart().equals(TEXT_TAG)) {
// We read the attributes from this tag and add the
// color
// attribute to our object
Iterator<Attribute> attributes = startElement
.getAttributes();
while (attributes.hasNext()) {
Attribute attribute = attributes.next();
if (attribute.getName().getLocalPart()
.equals(COLOR_TAG)) {
object.setColor(attribute.getValue());
}
}
// And then get the text
event = eventReader.nextEvent();
object.setText(event.asCharacters().getData());
continue;
}
}
// If we reach the end of the message, return the object
if (event.isEndElement()) {
EndElement endElement = event.asEndElement();
if (endElement.getName().getLocalPart().equals(MESSAGE_TAG)) {
return object;
}
}
}
} catch (XMLStreamException | FileNotFoundException e) {
e.printStackTrace();
}
return null;
}
}
这是类控股的XML值
package self.edu.javaprojekt.model;
public class XMLObject {
private String sender, text, color;
public String getSender() {
return sender;
}
public String getText() {
return text;
}
public String getColor() {
return color;
}
public void setSender(String sender) {
this.sender = sender;
}
public void setText(String text) {
this.text = text;
}
public void setColor(String color) {
this.color = color;
}
@Override
public String toString() {
return "XMLObject [sender=" + sender + ", text=" + text + ", color="
+ color + "]";
}
}
看起来像一些编码问题。 – Leo