android 基础---> XStream 使用

android Xml 解析之 XStream 解析

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XStream解析

XStream 是一个开源项目，一套简单实用的类库，用于序列化对象与 XML 对象之间的相互转换,将 XML 文件内容解析为一个对象或将一个对象序列化为 XML 文件.

1. 下载路径

http://x-stream.github.io/download.html

2. 常用方法API

（1）fromXML()方法，返回值是Object

xStream.fromXML( File file) ;xStream.fromXML( InputStream in) ;xStream.fromXML( Reader reader ) ;xStream.fromXML( String xml ) ;xStream.fromXML( URL url ) ;xStream.fromXML( File file , Object root ) ;xStream.fromXML( InputStream in , Object root ) ;xStream.fromXML( Reader reader , Object root ) ;xStream.fromXML( String xml , Object root ) ;xStream.fromXML( URL url , Object root ) ;  

（2）toXML()方法

xStream.toXML( Object object ) ;   //返回值StringxStream.toXML( Object object , OutputStream out ); //返回值voidxStream.toXML( Object object , Writer writer );  //返回值void

（3）设置别名
根节点设置别名：参数一：别名 ； 参数二：当前的类名
xstream.alias( “blog” , Product.class ) ;

XStream 解析android项目 asset 文件夹 xml 文件

1. packageupdate.xml

<?xml version="1.0" encoding="utf-8"?><result>    <version>1.0</version>    <upgradeMode>1</upgradeMode>    <packages>        <versionName>1.00.01</versionName>        <url> <![CDATA[http://www.baidu.com]]></url>        <level>1</level>        <size>5550672</size>        <md5>A48F51DB26DE9EA8492AC5031647E8A2</md5>        <time>2016-06-27</time>        <desc> <![CDATA[ 1、修正了有线连接显示问题 ]]> </desc>    </packages></result>

2. Java 实体类

Result.java

package com.sky.xsteamtoparserxml;/** * Created by JerryLiu on 2016/7/19. */public class Result {    private String version;    private int upgradeMode;    private Packages packages;    public int getUpgradeMode() {        return upgradeMode;    }    public void setUpgradeMode(int upgradeMode) {        this.upgradeMode = upgradeMode;    }    public String getVersion() {        return version;    }    public void setVersion(String version) {        this.version = version;    }    public Packages getPackages() {        return packages;    }    public void setPackages(Packages packages) {        this.packages = packages;    }}

package.java

package com.sky.xsteamtoparserxml;/** * Created by JerryLiu on 2016/7/19. */public class Packages {    private String versionName;    private String url;    private int level;    private int size;    private String md5;    private String time;    private String desc;    public String getVersionName() {        return versionName;    }    public void setVersionName(String versionName) {        this.versionName = versionName;    }    public String getUrl() {        return url;    }    public void setUrl(String url) {        this.url = url;    }    public int getLevel() {        return level;    }    public void setLevel(int level) {        this.level = level;    }    public int getSize() {        return size;    }    public void setSize(int size) {        this.size = size;    }    public String getMd5() {        return md5;    }    public void setMd5(String md5) {        this.md5 = md5;    }    public String getTime() {        return time;    }    public void setTime(String time) {        this.time = time;    }    public String getDesc() {        return desc;    }    public void setDesc(String desc) {        this.desc = desc;    }}

3. 实现代码

public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        String fileName = "packageupdate.xml";        InputStream in = null;        try {            in = getResources().getAssets().open(fileName);            XStream xStream = new XStream();            xStream.alias("result", Result.class);            Result result = (Result) xStream.fromXML(in);            LogUtils.d("version = " + result.getVersion() + "\nupgradeMode = " + result.getUpgradeMode());            LogUtils.d(result.getPackages());        } catch (IOException e) {            e.printStackTrace();        }    }}

4. 运行结果

 D/LogUtils-/MainActivity.onCreate(MainActivity.java:30): version = 1.0； upgradeMode = 1； Packages {desc = "  1、修正了有线连接显示问题  ",  versionName = "1.00.01",  md5 = "A48F51DB26DE9EA8492AC5031647E8A2",  url = " http://www.baidu.com",  time = "2016-06-27",  size = 5550672,  level = 1}