分类

【XML】xStream浅录

JAVA学习网 2017-11-05 06:14:02

XStream可以用来转换对象-XML，或者XML-对象。
官网地址：http://x-stream.github.io

小案例：

实体类

FileVo.java

package cn.pinnsvin.xml.vo;

import java.math.BigInteger;
import java.util.Date;
import java.util.List;

public class FileVo {

    private String owner;
    private Date createDate;
    private Date lastUpdateDate;
    private String authority;
    private BigInteger size;
    private String title;
    private String content;
    @Override
    public String toString() {
        return "FileVo [owner=" + owner + ", createDate=" + createDate + ", lastUpdateDate=" + lastUpdateDate
                + ", authority=" + authority + ", size=" + size + ", title=" + title + ", content=" + content + "]";
    }
    public String getOwner() {
        return owner;
    }
    public void setOwner(String owner) {
        this.owner = owner;
    }
    public Date getCreateDate() {
        return createDate;
    }
    public void setCreateDate(Date createDate) {
        this.createDate = createDate;
    }
    public Date getLastUpdateDate() {
        return lastUpdateDate;
    }
    public void setLastUpdateDate(Date lastUpdateDate) {
        this.lastUpdateDate = lastUpdateDate;
    }
    public String getAuthority() {
        return authority;
    }
    public void setAuthority(String authority) {
        this.authority = authority;
    }
    public BigInteger getSize() {
        return size;
    }
    public void setSize(BigInteger size) {
        this.size = size;
    }
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    public String getContent() {
        return content;
    }
    public void setContent(String content) {
        this.content = content;
    }
}

FolderVo.java

package cn.pinnsvin.xml.vo;

import java.math.BigInteger;
import java.util.Date;
import java.util.List;

public class FolderVo {

    private List<FileVo> files;
    private List<FolderVo> folders;
    private String owner;
    private Date createDate;
    private Date lastUpdateDate;
    private String authority;
    private BigInteger allSize;
    private BigInteger usedSize;
    @Override
    public String toString() {
        return "FolderVo [files=" + files + ", folders=" + folders + ", owner=" + owner + ", createDate=" + createDate
                + ", lastUpdateDate=" + lastUpdateDate + ", authority=" + authority + ", allSize=" + allSize
                + ", usedSize=" + usedSize + "]";
    }
    public List<FileVo> getFiles() {
        return files;
    }
    public void setFiles(List<FileVo> files) {
        this.files = files;
    }
    public List<FolderVo> getFolders() {
        return folders;
    }
    public void setFolders(List<FolderVo> folders) {
        this.folders = folders;
    }
    public String getOwner() {
        return owner;
    }
    public void setOwner(String owner) {
        this.owner = owner;
    }
    public Date getCreateDate() {
        return createDate;
    }
    public void setCreateDate(Date createDate) {
        this.createDate = createDate;
    }
    public Date getLastUpdateDate() {
        return lastUpdateDate;
    }
    public void setLastUpdateDate(Date lastUpdateDate) {
        this.lastUpdateDate = lastUpdateDate;
    }
    public String getAuthority() {
        return authority;
    }
    public void setAuthority(String authority) {
        this.authority = authority;
    }
    public BigInteger getAllSize() {
        return allSize;
    }
    public void setAllSize(BigInteger allSize) {
        this.allSize = allSize;
    }
    public BigInteger getUsedSize() {
        return usedSize;
    }
    public void setUsedSize(BigInteger usedSize) {
        this.usedSize = usedSize;
    }
}

工具类

XStreamUtils.java

package cn.pinnsvin.xml.utils;

import java.io.File;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;

import cn.pinnsvin.xml.vo.FileVo;
import cn.pinnsvin.xml.vo.FolderVo;

public class XStreamUtils {
    private static XStream xStream;
    static{
        init();
    }
    public static void init(){
        xStream = new XStream(new DomDriver());
        xStream.registerConverter(new cn.pinnsvin.xml.utils.DateConverter("yyyyMMdd"));
        myAlias();
    }
    public static void myAlias(){
        xStream.alias("Folder", FolderVo.class);
        xStream.alias("File", FileVo.class);
    }
    public static String objectToXML(Object object){
        String xml = xStream.toXML(object);
        return xml;
    }
    public static Object xmlToObject(String xml){
        Object obj = xStream.fromXML(xml);
        return obj;
    }
    public static Object xmlToObject(File file){
        Object obj = xStream.fromXML(file);
        return obj;
    }
}

日期格式转换类

DateConverter.java

package cn.pinnsvin.xml.utils;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

import com.thoughtworks.xstream.converters.ConversionException;
import com.thoughtworks.xstream.converters.Converter;
import com.thoughtworks.xstream.converters.MarshallingContext;
import com.thoughtworks.xstream.converters.UnmarshallingContext;
import com.thoughtworks.xstream.io.HierarchicalStreamReader;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
public class DateConverter implements Converter{
    private String format;
    public DateConverter(String format) {
        super();
        this.format = format;
    }

    @Override
    public boolean canConvert(Class clazz) {
        return java.util.Date.class.isAssignableFrom(clazz);
    }

    @Override
    public void marshal(Object source, HierarchicalStreamWriter writer, MarshallingContext context) {
        java.util.Date date = (Date) source;
        DateFormat formatter = new SimpleDateFormat(format);
        writer.setValue(formatter.format(date));
    }

    @Override
     public Object unmarshal(HierarchicalStreamReader reader,
             UnmarshallingContext context) {
     java.util.Date date = new Date();
     DateFormat formatter = new SimpleDateFormat(format);
     try {
         date = formatter.parse(reader.getValue());
     } catch (ParseException e) {
             throw new ConversionException(e.getMessage(), e);
     }
     return date;
}
}

调用

package cn.pinnsvin;

import java.io.File;
import java.util.Date;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;

import cn.pinnsvin.xml.utils.XStreamUtils;
import cn.pinnsvin.xml.vo.FileVo;
import cn.pinnsvin.xml.vo.FolderVo;
import cn.pinnsvin.xml.vo.MyDate;

public class Main {

    public static void main(String[] args) throws ParseException {
        getS();
    }
    
    public static void getS() throws ParseException{
            FolderVo folder = new FolderVo();
            FileVo file = new FileVo();
            FileVo file1 = new FileVo();
            List<FileVo> files = new ArrayList();
            file.setAuthority("读写");
            file.setContent("XStream可以用来转换对象-XML，或者XML-对象。");
            file.setTitle("xml解析");
            file.setCreateDate(new SimpleDateFormat("yyyyMMdd").parse("20161125"));
            file1.setAuthority("读");
            file1.setContent("XStream可以用来转换对象-XML，或者XML-对象。");
            file1.setTitle("xml解析之XStream");
            files.add(file);
            files.add(file1);
            folder.setFiles(files);
            folder.setAuthority("读写");
            folder.setOwner("Pinnsvin");
            folder.setCreateDate(new Date());
            
            XStreamUtils streamUtils = new XStreamUtils();
            System.out.println(streamUtils.objectToXML(folder));
            FolderVo fd = (FolderVo)streamUtils.xmlToObject(new File("D:\\2.xml"));
            System.out.println(fd.toString());
            List<FileVo> fl = fd.getFiles();
//          System.out.println(fl.toString()); 
    }
}

输出

<Folder>
  <files>
    <File>
      <createDate>20161125</createDate>
      <authority>读写</authority>
      <title>xml解析</title>
      <content>XStream可以用来转换对象-XML，或者XML-对象。</content>
    </File>
    <File>
      <authority>读</authority>
      <title>xml解析之XStream</title>
      <content>XStream可以用来转换对象-XML，或者XML-对象。</content>
    </File>
  </files>
  <owner>Pinnsvin</owner>
  <createDate>20171028</createDate>
  <authority>读写</authority>
</Folder>
FolderVo [files=[FileVo [owner=null, createDate=Fri Nov 25 00:00:00 GMT+08:00 2016, lastUpdateDate=null, authority=读写, size=null, title=xml解析, content=XStream可以用来转换对象-XML，或者XML-对象。], FileVo [owner=null, createDate=null, lastUpdateDate=null, authority=读, size=null, title=xml解析之XStream, content=XStream可以用来转换对象-XML，或者XML-对象。]], folders=null, owner=Pinnsvin, createDate=Sat Oct 28 00:00:00 GMT+08:00 2017, lastUpdateDate=null, authority=读写, allSize=null, usedSize=null]
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