【Android 基础】 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String

xStream.toXML( Object object , OutputStream out ); //返回值void

xStream.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

    1.0
    1
    
        1.00.01
         
        1
        5550672
        A48F51DB26DE9EA8492AC5031647E8A2
        2016-06-27
          
    

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}