使用PropertyUtils 将javaBean转化成Map

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最新推荐文章于 2024-07-31 04:31:57 发布

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本文通过具体示例展示了如何使用commons-beanutils库将JavaBean对象转换为Map集合。涉及的JavaBean包括Book和Author，演示了如何获取这些对象的所有可读属性。

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需要导入commons-beanutils.jar 和 commons-logging.jar
下面是两个javaBean
Author.java

package com.beanUtil;

public class Author {
	private String name;

	public Author() {
		super();
	}

	public String getName() {
		return name;
	}

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

Book.java

package com.beanUtil;

public class Book {
	private String name;
	private Author author;

	public String getName() {
		return name;
	}

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

	public Author getAuthor() {
		return author;
	}

	public void setAuthor(Author author) {
		this.author = author;
	}
}

Bean2Map.java

package com.beanUtil;

import java.util.Map;
import java.lang.reflect.InvocationTargetException;
import org.apache.commons.beanutils.PropertyUtils;

public class Bean2Map {

	@SuppressWarnings("unchecked")
	public static void main(String[] args) {
		Author author = new Author();
		author.setName("wenliang.li");

		Book book = new Book();
		book.setName("pro spring");
		book.setAuthor(author);

		// 取得book中的所有可读属性,返回到map中
		Map<String, Book> bookMap = null;
		Map<String, Author> authorMap = null;
		try {
			bookMap = PropertyUtils.describe(book);
			// Book类中包含一个Author类型的属性
			// 取bookMap中的author bean,并将其所有可读属性返回到authorMap中
			authorMap = PropertyUtils.describe(bookMap.get("author"));

		} catch (IllegalAccessException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (NoSuchMethodException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		// 输出
		// Book Name: pro spring
		// Author Name: wenliang.li
		System.out.println("Book Name: " + bookMap.get("name"));
		System.out.println("Author Name: " + authorMap.get("name"));
	}
}