Java基础bean操作工具bealUtils实例

俺要跳槽啦  后天面试Android 哦也 这几天java基础过一遍 明天android基础过一遍 哦也 后天期待成功

BeanUtils工具包下载地址:http://commons.apache.org/proper/commons-beanutils/  BeanUtils中还引用了一个包logging下载地址:

http://commons.apache.org/proper/commons-logging/

实例如下

package com.java.xiong.beanUtils0302;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.LinkedHashMap;
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;

public class Test1 {

	@Test
	public void test1() throws IllegalAccessException,
			InvocationTargetException, IllegalArgumentException,
			SecurityException, InstantiationException, NoSuchMethodException,
			ClassNotFoundException {

		String name = "xiong";
		String age = "24";
		String brday = "1990-09-09";
		Person p = (Person) (Class.forName(
				"com.java.xiong.beanUtils0302.Person").getConstructor()
				.newInstance());
		// 因为BeanUtils只支持8种基本类型 其余的类型需要注册
		ConvertUtils.register(new Converter() {

			@Override
			public <T> T convert(Class<T> type, Object value) {
				if (value == null) {
					return null;
				}
				if (!(value instanceof String)) {
					throw new ConversionException("只支持String类型");
				}
				if (value.toString().trim().equals("")) {
					return null;
				}
				try {
					Date date = null;
					SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
					date = df.parse(value.toString());
					return (T) date;
				} catch (ParseException e) {
					throw new RuntimeException(e);
				}
			}

		}, Date.class);
		// 调用setProperty为beal赋值
		BeanUtils.setProperty(p, "name", name);
		BeanUtils.setProperty(p, "age", age);
		BeanUtils.setProperty(p, "brday", brday);
		System.out.println(p.getName());
		System.out.println(p.getAge());
		System.out.println(p.getBrday());
	}

	@Test
	public void test2() throws Exception {
		Class<?> cl = Class.forName("com.java.xiong.beanUtils0302.Person");
		Constructor<?> con = cl.getConstructor();
		// 获取Person对象
		Person p = (Person) con.newInstance();
		String name = "xiong";
		String age = "24";
		String brday = "1990-09-09";
		ConvertUtils.register(new DateLocaleConverter(), Date.class);
		BeanUtils.setProperty(p, "name", name);
		BeanUtils.setProperty(p, "age", age);
		BeanUtils.setProperty(p, "brday", brday);
		System.out.println(p.getName());
		System.out.println(p.getAge());
		System.out.println(p.getBrday());
	}

	@Test
	public void test3() throws Exception {
		Map<String, String> map = new LinkedHashMap<String, String>();
		map.put("name", "xiong");
		map.put("age", "24");
		map.put("brday", "1990-09-09");
		Person p = (Person) (Class.forName(
				"com.java.xiong.beanUtils0302.Person").getConstructor()
				.newInstance());
		ConvertUtils.register(new DateLocaleConverter(), Date.class);
		BeanUtils.populate(p, map);
		System.out.println(p.getName());
		System.out.println(p.getAge());
		System.out.println(DateFormat.getDateInstance().format(p.getBrday()));

	}

}

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