XStream解析xml学习笔记(一)

1、在模块目录下创建action,dto两个package。

2、在action中创建AuthorConverter.java和xstream_main.java文件

    2.1——AuthorConverter.java

package com.test.xstream.blog.action;

import com.test.xstream.blog.dto.Author;
import com.thoughtworks.xstream.converters.SingleValueConverter;

public class AuthorConverter implements SingleValueConverter {
	public String toString(Object obj) {
		return ((Author) obj).getName();
	}

	public Object fromString(String name) {
		return new Author(name);
	}

	public boolean canConvert(Class type) {
		return type.equals(Author.class);
	}

}

 

    2.2——xstream_main.java

package com.test.xstream.blog.action;

import java.io.FileNotFoundException;

import com.test.xstream.blog.dto.Author;
import com.test.xstream.blog.dto.Blog;
import com.test.xstream.blog.dto.Entry;
import com.thoughtworks.xstream.XStream;

public class xstream_main {
	public static void main(String[] args) throws FileNotFoundException 
	{
        Blog teamBlog = new Blog(new Author("Guilherme Silveira"));
        teamBlog.add(new Entry("first","My first blog entry."));
        teamBlog.add(new Entry("tutorial","Today we have developed a nice alias tutorial. Tell your friends! NOW!"));
        XStream xstream = new XStream();
        //取别名
        xstream.processAnnotations(Blog.class);
        xstream.processAnnotations(Entry.class);
        
        xstream.addImplicitCollection(Blog.class, "entries");//去掉entries标签
        
        xstream.useAttributeFor(Blog.class, "writer");
        xstream.registerConverter(new AuthorConverter());
        
//        FileOutputStream file = new FileOutputStream("WebContent/xml/blog.xml");
//        
//        xstream.toXML(teamBlog, file);
        
        System.out.println(xstream.toXML(teamBlog));
	}
}

 

3、在dto中创建Author.java、Blog.java、Entry.java文件。分别对应于xml文件中的<blog author="">、<blog>、<entry>。

    3.1——Author.java

package com.test.xstream.blog.dto;

public class Author 
{
    private String name;
    public Author(String name) {
            this.name = name;
    }
    public String getName() {
            return name;
    }
}

 

    3.2——Blog.java

package com.test.xstream.blog.dto;

import java.util.ArrayList;
import java.util.List;

import com.thoughtworks.xstream.annotations.XStreamAlias;

@XStreamAlias("blog")
public class Blog 
{
	@XStreamAlias("author")
	private Author writer;
    private List entries = new ArrayList();

    public Blog(Author writer) {
            this.writer = writer;
    }
    public void add(Entry entry) {
            entries.add(entry);
    }
    public List getContent() {
            return entries;
    }
}

 

    3.3——Entry.java

package com.test.xstream.blog.dto;

import com.thoughtworks.xstream.annotations.XStreamAlias;

@XStreamAlias("entry")
public class Entry {
    private String title, description;
    public Entry(String title, String description) {
            this.title = title;
            this.description = description;
    }
}

 

4、blog.xml文件内容如下：

<?xml version="1.0" encoding="UTF-8"?>
<blog author="Guilherme Silveira">
  <entry>
    <title>first</title>
    <description>My first blog entry.</description>
  </entry>
  <entry>
    <title>tutorial</title>
    <description>Today we have developed a nice alias tutorial. Tell your friends! NOW!</description>
  </entry>
</blog>