使用BeanUtils操作Bean屬性

package com.wzh.test.beanutils;

import java.lang.reflect.InvocationTargetException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.beanutils.ConversionException;
import org.apache.commons.beanutils.ConvertUtils;
import org.apache.commons.beanutils.Converter;
import org.apache.commons.beanutils.locale.converters.DateLocaleConverter;
import org.junit.Test;

//使用BeanUtils操作Bean屬性（第三方）
public class Demo1 {

	@Test
	public void test1() throws IllegalAccessException,
			InvocationTargetException {
		Person p = new Person();
		BeanUtils.setProperty(p, "name", "victor");

		System.out.println(p.getName());
	}

	@Test
	public void test2() throws IllegalAccessException,
			InvocationTargetException {
		Person p = new Person();
		// 自動將String轉為int 支持8種基本數據類型
		BeanUtils.setProperty(p, "age", "23");
		// 默認不支持時間轉換
		BeanUtils.setProperty(p, "Birthday", "2012-3-1");
		System.out.println(p.getAge());
		System.out.println(p.getBirthday());
	}

	@Test
	public void test3() throws IllegalAccessException,
			InvocationTargetException {

		// 為了讓日期賦到Bean的Birthday屬性上，我們給BeanUtils注冊一個日期轉換器(敲入代碼未起作用，需檢查)
		// 方法1.
		ConvertUtils.register(new Converter() {
			@Override
			public Object convert(Class type, Object value) {
				if (value == null)
					return null;

				if (!(value instanceof String)) {
					System.out.println("不是日期類型");
					throw new ConversionException("不是日期類型");
				}

				String str = (String) value;
				if (str.trim().equals(str)) {
					return null;
				}

				SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
				try {
					return df.parse(str);
				} catch (ParseException e) {
					throw new RuntimeException(e);// 異常鏈不能斷
				}
			}
		}, Date.class);

		// ConvertUtils.register(new DateLocaleConverter(), Date.class);
		Person p = new Person();
		// 自動將String轉為int 支持8種基本數據類型

		BeanUtils.setProperty(p, "birthday", "2012-12-12");
		System.out.println(p.getBirthday());
	}

	@Test
	public void test4() throws IllegalAccessException,
			InvocationTargetException {

		Map map = new HashMap();
		map.put("name", "aa");
		map.put("birthday", "2012-1-1");

		ConvertUtils.register(new DateLocaleConverter(), Date.class);
		Person p = new Person();
		// 自動將String轉為int 支持8種基本數據類型

		BeanUtils.populate(p, map);//用Map集合中的值填充到Bean的屬性
		System.out.println(p.getBirthday());
	}
}

package com.wzh.test.beanutils;

import java.util.Date;

public class Person {

	public Person() {
		super();
		// TODO Auto-generated constructor stub
	}
	private String name;
	private String age;
	private Date birthday;
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}

	public String getAge() {
		return age;
	}
	public void setAge(String age) {
		this.age = age;
	}
	public Date getBirthday() {
		return birthday;
	}
	public void setBirthday(Date birthday) {
		this.birthday = birthday;
	}
}