XStream简单对象使用

 

XStream的优点很多，但是也有一些小bug，比如在定义别名中的下划线“_”转换为xml后会变成“__”这个符号，很变态。因此，尽量避免在别名中实用任何符号，却是需要下划线的时候，可以考虑实用连接符“-”，这个没有问题。

 

另外，我们的Java Bean中，常常有一些常量，在转换过程，XStream也会将这些常量转换过去，形成常量的xml节点，这显然不是想要的结果，对于常量字段，就不做转换了。

Category.java

 

public class Category {

	private int id;
	private String name;
	private String remark;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getRemark() {
		return remark;
	}

	public void setRemark(String remark) {
		this.remark = remark;
	}

}

 Content.java

 

public class Content {
	private int id;
	private String title;
	private String content;
	private String createTime;
	private String updateTime;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	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;
	}

	public String getCreateTime() {
		return createTime;
	}

	public void setCreateTime(String createTime) {
		this.createTime = createTime;
	}

	public String getUpdateTime() {
		return updateTime;
	}

	public void setUpdateTime(String updateTime) {
		this.updateTime = updateTime;
	}
}

 Java对象转换成XML：

 

package com;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.nio.charset.Charset;

import com.model.Content;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;

public class Object2XML {
	static XStream xs = new XStream(new DomDriver());
	static String xmlContent;

	public static void main(String args[]) {
		Content content = new Content();
		content.setId(001);
		content.setTitle("XStreamTest");
		content.setContent("ooxx");
		content.setCreateTime("yesterday");
		content.setUpdateTime("now");

		try {
			String location = "d:/temp/object2xml.xml";
			File file = new File(location);
			if(!file.exists()||file.isDirectory()){
				String[] arry=location.split("/");
				File file1=new File(arry[0]+"/"+arry[1]); //创建文件夹后如果后面对文件操作的话会自动创建文件
				file1.mkdir();
			}
			FileOutputStream fos = new FileOutputStream(file); //提示：字节流
			OutputStreamWriter osw = new OutputStreamWriter(fos, Charset.forName("gbk")); //作用：使字节流转换成字符流  osw是字符流通向字节流的桥梁，使用Charset指定字符编码
			//ows调用write（）方法会调用转换器
			BufferedWriter bw = new BufferedWriter(osw); //提示：为了获得最高效率，把osw包装到bw中，这样做可以避免频繁调用转换器
			bw.write("<?xml version=\"1.0\" encoding=\"gbk\" ?>\n"); //提示：在生成的xml前面加上基本信息
			xs.alias("content", Content.class);  //提示：给类取别名
			xs.aliasField("内容", Content.class, "content");  //提示：给属性取别名
			xs.toXML(content, bw);
			bw.close();  //作用：关闭流
			osw.close();
			fos.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}

 结果：

 

<?xml version="1.0" encoding="gbk" ?>
<content>
  <id>1</id>
  <title>XStreamTest</title>
  <内容>ooxx</内容>
  <createTime>yesterday</createTime>
  <updateTime>now</updateTime>
</content>

 XML转换成Java对象：

 

package com;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import com.model.Content;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;

public class XML2Object {

	static XStream xs = new XStream(new DomDriver());

	public static void main(String args[]) {
		File file = new File("d:/temp/object2xml.xml"); // 名字区分大小写!
		Content content = new Content();
		try {
			FileInputStream fis = new FileInputStream(file);
			InputStreamReader isw = new InputStreamReader(fis);
			BufferedReader br = new BufferedReader(isw);
			xs.alias("content", Content.class);// 生成与解析时代别名要对应！！！！
			xs.aliasField("内容", Content.class, "content");
			xs.fromXML(br, content);
			br.close();
			isw.close();
			fis.close();
			System.out.println("id=" + content.getId());
			System.out.println("title=" + content.getTitle());
			System.out.println("content=" + content.getContent());
			System.out.println("createTime=" + content.getCreateTime());
			System.out.println("updateTime=" + content.getUpdateTime());
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

 结果：

 

id=1

title=XStreamTest

content=ooxx

createTime=yesterday

updateTime=now