薩克斯解析器XML字符串Java Android

Question

嗨 ，

對於Java Android中遇到的問題，我需要一些幫助。

首先我為每個標簽讀取一個XML String值。

要獲得正確的值，請讀取標簽，如果有人知道如何感謝您的幫助，則收到的9個字符串中只有9個部分讀取。

然后，介紹用於讀取XML的代碼。

SAXParser saxParser = saxParserFactory.newSAXParser(); 
Parse_xml parseXMLClass = new Parse_xml(); 
saxParser.parse(new InputSource(new StringReader(message_posted)), parseXMLClass);

以下是讀取標簽的類：

public void startElement(String uri, String localName, String qName,
        Attributes attributes) throws SAXException
{

if (localName.equalsIgnoreCase("MSG"))
    {
        if (listMSG == null)
        {
            listMSG = new ArrayList<MSG>();

        }
    }

    if (localName.equalsIgnoreCase("Delete"))
    {
        if (listMSG == null)
        {
            listMSG = new ArrayList<MSG>();

        }
    }

    if (localName.equalsIgnoreCase("Clear"))
    {
        if (listMSG == null)
        {
            listMSG = new ArrayList<MSG>();

        }
    }

    if (localName.equalsIgnoreCase("ID"))
    {
        bID = true;
    }
    if (localName.equalsIgnoreCase("DESTINATION"))
    {
        bDestination = true;
    }
    if (localName.equalsIgnoreCase("SOURCE"))
    {
        bSource = true;
    }
    if (localName.equalsIgnoreCase("DATE"))
    {
        bDate = true;
    }
    if (localName.equalsIgnoreCase("SUBJECT"))
    {
        bSubject = true;
    }
    if (localName.equalsIgnoreCase("BODY"))
    {
        bMessage = true;
    }
    if (localName.equalsIgnoreCase("SMS"))
    {
        bType = true;
    }
    if (localName.equalsIgnoreCase("TTL"))
    {
        config = new Configuration();
        bTtl = true;
    }
    if (localName.equalsIgnoreCase("ATTEMPTS"))
    {
        bAttempet = true;
    }

    if (localName.equalsIgnoreCase("SMTP"))
    {
        bSmtp = true;
    }
    if (localName.equalsIgnoreCase("PORT"))
    {
        bPort = true;
    }
    if (localName.equalsIgnoreCase("USERNAME"))
    {
        bUsername = true;
    }
    if (localName.equalsIgnoreCase("PASSWORD"))
    {
        bPass = true;
    }
    if (localName.equalsIgnoreCase("EMAIL"))
    {
        bEmail = true;
    }
    if (localName.equalsIgnoreCase("STATUS"))
    {
        bStatus = true;
    }
}

@Override
public void endElement(String uri, String localName, String qName)
        throws SAXException
{
    if (localName.equalsIgnoreCase("MSG"))
    {
        listMSG.add(msg);
        msg = new MSG();
    }
    if (localName.equalsIgnoreCase("DELETE"))
    {
        listMSG.add(msg);
        msg = new MSG();
    }
    if (localName.equalsIgnoreCase("Clear"))
    {
        listMSG.add(msg);
        msg = new MSG();
    }

}

@Override
public void characters(char ch[], int start, int length)
        throws SAXException
{
     */
    if (bID)
    {
        String id=String.copyValueOf(ch, start, length).trim();
        msg.setId(Integer.parseInt(id));
        bID = false;
    }
    if (bDestination)
    {
        String destinaton=String.copyValueOf(ch, start, length).trim();
        msg.setDestination(destinaton);
        bDestination = false;
    }
    if (bSource)
    {
        String source=String.copyValueOf(ch, start, length).trim();
        msg.setSource(source);
        bSource = false;
    }
    if (bDate)
    {
        String date=String.copyValueOf(ch, start, length).trim();
        msg.setDate(date);
        bDate = false;
    }
    if (bSubject)
    {
        String subject=String.copyValueOf(ch, start, length).trim();;
        msg.setSubject(subject);
        bSubject = false;
    }
    if (bMessage)
    {
        String body=String.copyValueOf(ch, start, length).trim();
        msg.setbody(body);
        bMessage = false;
    }
    if (bType)
    {
        String type=String.copyValueOf(ch, start, length).trim();
        msg.setType(Integer.parseInt(type));
        bType = false;
    }
    if (bStatus)
    {
        String status=String.copyValueOf(ch, start, length).trim();
        msg.setStatus(Integer.parseInt(status));
        bStatus = false;
    }
    if (bTtl)
    {
        String ttl=String.copyValueOf(ch, start, length).trim();
        config.setTtl(Integer.parseInt(ttl));
        bTtl = false;
    }
    if (bAttempet)
    {
        String attempt=String.copyValueOf(ch, start, length).trim();
        config.setAttempt(Integer.parseInt(attempt));
        bAttempet = false;
    }
    if (bSmtp)
    {
        String smtp=String.copyValueOf(ch, start, length).trim();
        config.setSmtp(smtp);
        bSmtp = false;
    }
    if (bPort)
    {
        String porta=String.copyValueOf(ch, start, length).trim();
        config.setPorta(Integer.parseInt(porta));
        bPort = false;
    }
    if (bUsername)
    {
        String username=String.copyValueOf(ch, start, length).trim();
        config.setUsername(username);
        bUsername = false;
    }
    if (bPass)
    {
        String pass=String.copyValueOf(ch, start, length).trim();
        config.setPass(pass);
        bPass = false;
    }
    if (bEmail)
    {
        String email=String.copyValueOf(ch, start, length).trim();
        config.setEmail(email);
        bEmail = false;
    }


}

Answer 1

也許對您有幫助

@Override
    public void characters(char ch[], int start, int length)
            throws SAXException
    {
        //Your code here, and then...
        if(bYourLongType) {
           String yourLongType = String.copyValueOf(ch, start, length).trim();
           Long longValue = Long.parseLong(yourLongType);
           bYourLongType = false;
        }
    }

Answer 2

在sax解析器中，character（）方法每次最多只能解析1024個字符。 因此，我們需要追加字符串，直到解析所有字符為止。 看看這個答案。

https://stackoverflow.com/a/9112055/685240

讓我知道是否有幫助。

Answer 3

請看我的代碼

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class ReadXMLFile {

   public static void main(String argv[]) {

    try {

    SAXParserFactory factory = SAXParserFactory.newInstance();
    SAXParser saxParser = factory.newSAXParser();

    DefaultHandler handler = new DefaultHandler() {

    boolean bfname = false;
    boolean blname = false;
    boolean bnname = false;
    boolean bsalary = false;

    public void startElement(String uri, String localName,String qName, 
                Attributes attributes) throws SAXException {

        System.out.println("Start Element :" + qName);

        if (qName.equalsIgnoreCase("FIRSTNAME")) {
            bfname = true;
        }

        if (qName.equalsIgnoreCase("LASTNAME")) {
            blname = true;
        }

        if (qName.equalsIgnoreCase("NICKNAME")) {
            bnname = true;
        }

        if (qName.equalsIgnoreCase("SALARY")) {
            bsalary = true;
        }

    }

    public void endElement(String uri, String localName,
        String qName) throws SAXException {

        System.out.println("End Element :" + qName);

    }

    public void characters(char ch[], int start, int length) throws SAXException {

        if (bfname) {
            System.out.println("First Name : " + new String(ch, start, length));
            bfname = false;
        }

        if (blname) {
            System.out.println("Last Name : " + new String(ch, start, length));
            blname = false;
        }

        if (bnname) {
            System.out.println("Nick Name : " + new String(ch, start, length));
            bnname = false;
        }

        if (bsalary) {
            System.out.println("Salary : " + new String(ch, start, length));
            bsalary = false;
        }

    }

     };

       saxParser.parse("c:\\file.xml", handler);

     } catch (Exception e) {
       e.printStackTrace();
     }

   }

}

如果您有任何問題，請告訴我。