android network develop(3)----Xml Parser

Normally, there are three type parser in android. Xmlpullparser, DOM & SAX.

Google recomand Xmlpullparser to doing this.

But to parser xml files or inputstream, it based on xml content.

So using an general way to parser xml.

BaseXmlObj:

 

/***********************************************************



 *@description : This class function is TODO 



 *



 * @create author : deman.lu



 * @create date   :2015-07-15



 * @modify author :



 * @modify date   :



 * @contact: [email protected]



 *



 **********************************************************/

package com.joyfulmath.androidstudy.connect.xmlparser;



import java.lang.reflect.Field;



public abstract class BaseXmlObj {

    public abstract String[] getNodes();



    public void setParamater(String tag, Object value) {



        try {



            Field field = getClass().getField(tag);



            field.setAccessible(true);



            field.set(this, value);



        } catch (SecurityException e) {



            e.printStackTrace();



        } catch (NoSuchFieldException e) {



            e.printStackTrace();



        } catch (IllegalArgumentException e) {



            e.printStackTrace();



        } catch (IllegalAccessException e) {



            e.printStackTrace();



        }



    }

}

/***********************************************************



 *@description : This class function is TODO 



 *



 * @create author : deman.lu



 * @create date   :2015-07-15



 * @modify author :



 * @modify date   :



 * @contact: [email protected]



 *



 **********************************************************/



package com.joyfulmath.androidstudy.connect.xmlparser;



import java.io.InputStream;



import org.xmlpull.v1.XmlPullParser;

import org.xmlpull.v1.XmlPullParserException;

import org.xmlpull.v1.XmlPullParserFactory;



import android.content.res.XmlResourceParser;



public class XmlParserUtils {



    private static String encode = "utf-8";

    public static XmlPullParser pullParser;

    static {



        try {

            pullParser = XmlPullParserFactory.newInstance().newPullParser();

        } catch (XmlPullParserException e) {

            e.printStackTrace();

        }

    }

    

    /**

     * 

     * @description :解析节点中的内容，封装成对象模型。

     * 

     * @author : deman.lu

     * 

     * @create :2015-07-15

     * 

     * @param in    network data contains xml

     * 

     * @param obj

     * 

     * @throws Exception

     * 

     * @return :T extends BaseXmlObj

     */

    public static <T extends BaseXmlObj> void streamText2Model(InputStream in,

            T obj) throws Exception {



        pullParser.setInput(in, encode);

        int eventType = pullParser.getEventType();

        String[] nodes = obj.getNodes();

        String nodeName = null;

        boolean success = true;



        while (eventType != XmlPullParser.END_DOCUMENT && success) {



            switch (eventType) {

            case XmlPullParser.START_DOCUMENT:

                break;



            case XmlPullParser.START_TAG:

                nodeName = pullParser.getName();

                break;



            case XmlPullParser.TEXT:

                for (int i = 0; i < nodes.length; i++) {

                    if (nodes[i].equals(nodeName)) {

                        obj.setParamater(nodeName, pullParser.getText());

                    }

                }

                break;



            case XmlPullParser.END_TAG:

                break;

            }



            eventType = pullParser.next();

        }

    }

    

    /**

     * 

     * @description :解析节点中的内容，封装成对象模型。

     * 

     * @author : deman.lu

     * 

     * @create :2015-07-15

     * 

     * @param resParser        XmlResourceParser read form resource

     * 

     * @param obj

     * 

     * @throws Exception

     * 

     * @return :void

     */

    public static <T extends BaseXmlObj> void streamText2Model(XmlResourceParser resParser,

            T obj) throws Exception {



        int eventType = resParser.getEventType();

        String[] nodes = obj.getNodes();

        String nodeName = null;

        boolean success = true;



        while (eventType != XmlPullParser.END_DOCUMENT && success) {



            switch (eventType) {

            case XmlPullParser.START_DOCUMENT:

                break;



            case XmlPullParser.START_TAG:

                nodeName = resParser.getName();

                break;



            case XmlPullParser.TEXT:

                for (int i = 0; i < nodes.length; i++) {

                    if (nodes[i].equals(nodeName)) {

                        obj.setParamater(nodeName, resParser.getText());

                    }

                }

                break;



            case XmlPullParser.END_TAG:

                break;

            }



            eventType = resParser.next();

        }

    }

    

}

we using reflect, but if xml is complex, the efficiency may be low.

The way should be decided.

package com.joyfulmath.androidstudy.connect;



import java.io.Serializable;



import com.joyfulmath.androidstudy.connect.xmlparser.BaseXmlObj;



public class Student extends BaseXmlObj implements Serializable {



    /**

     * 

     */

    private static final long serialVersionUID = 1L;

    

    public String GradeID, GradeName, ClassID, ClassName, UserID, UserName;

    

    public Student() {

    }

    

    @Override

    public String[] getNodes() {

        return new String[] { "GradeID", "GradeName", "ClassID", "ClassName", "UserID", "UserName" };

    }





    

    @Override

    public String toString() {

        String su = "@student:"+"GradeID:"+GradeID

                +"GradeName:"+GradeName

                +"ClassID:"+ClassID

                +"ClassName:"+ClassName

                +"UserID:"+UserID

                +"UserName:"+UserName;

        return NetWorkUtils.replaceBlank(su);

    }

    

    

}

package com.joyfulmath.androidstudy.connect;





import com.joyfulmath.androidstudy.connect.xmlparser.XmlParserUtils;



import android.content.Context;

import android.content.res.XmlResourceParser;



public class XmlParserDemo {

    

    public static Student parserStudentXml(Context context,int resId)

    {

        try {

            Student student = new Student();

            XmlResourceParser xml = context.getResources()

                    .getXml(resId);

            XmlParserUtils.streamText2Model(xml, student);

            xml.close();

            return student;

        } catch (Exception e) {

            e.printStackTrace();

        }

        

        return null;

        

    }

}

<?xml version="1.0" encoding="UTF-8"?>

<DsXml>



    <IsLog>

true



    </IsLog>



    <GradeID>

10001



    </GradeID>



    <GradeName>

高一年级



    </GradeName>



    <ClassID>

10010



    </ClassID>



    <ClassName>

高一(01)班



    </ClassName>



    <UserID>

10000



    </UserID>



    <UserName>

张三



    </UserName>



</DsXml>

转载：http://www.cnblogs.com/vanezkw/archive/2013/03/03/2941496.html