Java对象与json对象的转行

jsontools 工具包可以将Java对象转化成json对象，也可以讲jsonString 转化成Java对象，转化的过程十分方便。

注意：1.对象必需实现默认的构造函数，因为jsontools在解析的时候使用了反射实例化属性对象，

         2.必需给属性提供get，set 方法，因为jsontools 使用了内省获得属性值。

 public class Blog {
	
    private Author writer;
    
	private List<Entry>  entries = new ArrayList<Entry> ();

    public Blog() {
		super();
	}

	public Blog(Author writer) {
            this.writer = writer;
    }

    public void add(Entry entry) {
            entries.add(entry);
    }

  
	public Author getWriter() {
		return writer;
	}

	public void setWriter(Author writer) {
		this.writer = writer;
	}

	public List<Entry> getEntries() {
		return entries;
	}

	public void setEntries(List<Entry> entries) {
		this.entries = entries;
	}
}

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

public class Entry {
    private String title, description;
    
    
    public Entry() {
		super();
	}


	public Entry(String title, String description) {
            this.title = title;
            this.description = description;
    }


	public String getTitle() {
		return title;
	}


	public void setTitle(String title) {
		this.title = title;
	}


	public String getDescription() {
		return description;
	}


	public void setDescription(String description) {
		this.description = description;
	}
    
    
}

public static void main(String[] args) throws Exception {

		try {
			Object o = Blog.class.newInstance();
		} catch (Exception e) {
			e.printStackTrace();
		}

		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!"));

		// 序列化
		JSONValue jsonValue = JSONMapper.toJSON(teamBlog);

		String jsonStr = jsonValue.render(true); // 是否格式化

		System.out.println(jsonStr);

		// 反序列化
		JSONParser parser = new JSONParser(new StringReader(jsonStr));
		// JSONObject.decorate(anObject)

		Blog b = (Blog) JSONMapper.toJava(parser.nextValue(), Blog.class);
		System.out.println(b);
		// Blog b = (Blog)JSONMapper.toJava(parser.nextValue(),
		// new ParameterizedType(){
		//
		// @Override
		// public Type[] getActualTypeArguments() {
		//
		// return null;
		// }
		//
		// @Override
		// public Type getOwnerType() {
		//
		// return null;
		// }
		//
		// @Override
		// public Type getRawType() {
		//
		// return null;
		// }
		//    	  
		// }
		// );

	}
}

需要:jsontools-core-1.7 和 antlrworks-1.3.1.jar (附件)
转自:http://www.iteye.com/topic/647308

评论

1 楼 shuiguozheng 2010-05-17  

谢了，兄弟！
   请问下  这个夹包有什么用啊！antlrworks-1.3.1.jar ！