month.java

这是一个关于J2EE的开源包common里的许多组件的示例应用程序,可以借鉴.

package beanutils;

import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

import org.apache.commons.beanutils.BasicDynaClass;
import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.beanutils.ConstructorUtils;
import org.apache.commons.beanutils.ConvertUtils;
import org.apache.commons.beanutils.DynaBean;
import org.apache.commons.beanutils.DynaProperty;
import org.apache.commons.beanutils.LazyDynaMap;
import org.apache.commons.beanutils.MethodUtils;
import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.beanutils.WrapDynaBean;

/**
 * Title : Base Dict Class
 * Description : here Description is the function of class, here maybe multirows    
 * @author        <a href="mailto:[e-mail]">kevin</a> 
 * @Version       1.0 
 */

/**
 * Class description goes here.
 * @version 1.0  2005-9-21 
 * @author kevin
 */
public class Month
{
	private int value;
	private String name;
	private SimpleMonth simple;
	private int[] days = {11, 22, 33, 44, 55};

	public Month(int v, String n)
	{
		value = v;
		name = n;
		simple = new SimpleMonth();
	}

	/**
	 * @return Returns the simple.
	 */
	public SimpleMonth getSimple()
	{
		return simple;
	}

	/**
	 * @param simple The simple to set.
	 */
	public void setSimple(SimpleMonth simple)
	{
		this.simple = simple;
	}

	/**
	 * Returns the name.
	 * @return String
	 */
	public String getName()
	{
		return name;
	}

	/**
	 * Returns the value.
	 * @return int
	 */
	public int getValue()
	{
		return value;
	}

	/**
	 * Sets the name.
	 * @param name The name to set
	 */
	public void setName(String name)
	{
		this.name = name;
	}

	/**
	 * Sets the value.
	 * @param value The value to set
	 */
	public void setValue(int value)
	{
		this.value = value;
	}

	public void methodTest(String test)
	{
		System.out.println(">>>>>>>>>..methodTest()===" + test);
	}

	/**
	 * @see java.lang.Object#toString()
	 */
	public String toString()
	{
		return value + "(" + name + ")";
	}

	public int[] getDays()
	{
		return days;
	}

	public void setDays(int[] is)
	{
		days = is;
	}

	public static void getProperty()
	{
		/*Month month = new Month(1, "Jan");
		 try
		 {
		 System.out.println(BeanUtils.getProperty(month, "name"));
		 }
		 catch(Exception e)
		 {
		 e.printStackTrace();
		 }*/
		Month month = new Month(1, "Jan");

		try
		{
			System.out.println(PropertyUtils.getIndexedProperty(month, "days", 1));
			System.out.println(PropertyUtils.getNestedProperty(month, "simple.name"));
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}

	}

	public static void copyProperties()
	{
		Month month1 = new Month(1, "Jan");
		//Month month2 = new Month(2, "Feb");
		SimpleMonth month2 = new SimpleMonth();
		month2.setName("test--");
		month2.setValue(1111);
		try
		{
			BeanUtils.copyProperties(month1, month2);
			System.out.println("====>" + month1.getValue());
		}
		catch(Exception e)
		{
		}
	}

	public static void describe()
	{
		Month month = new Month(1, "Jan");
		try
		{
			Map map = BeanUtils.describe(month);
			Set keySet = map.keySet();
			for(Iterator iter = keySet.iterator(); iter.hasNext();)
			{
				Object element = (Object)iter.next();
				System.out.println("KeyClass:" + element.getClass().getName());
				System.out.println("ValueClass:" + map.get(element).getClass().getName());
				System.out.print(element + "\t");
				System.out.print(map.get(element));
				System.out.println();
			}
			Month bean = new Month(2, "Feb");
			BeanUtils.populate(bean, map);
			System.out.println("BeanUtils.populate===>" + bean.getName());

		}
		catch(IllegalAccessException e)
		{
			e.printStackTrace();
		}
		catch(InvocationTargetException e)
		{
			e.printStackTrace();
		}
		catch(NoSuchMethodException e)
		{
			e.printStackTrace();
		}
	}

	public static void createObj()
	{
		Object[] paramters = {new Integer(33), "test"};
		try
		{
			Object obj = ConstructorUtils.invokeConstructor(Month.class, paramters);
			Month month = (Month)obj;
			System.out.println(BeanUtils.getProperty(month, "name"));
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}

	}

	public static void methodObj()
	{
		Month month = new Month(1, "Jan");
		try
		{
			MethodUtils.invokeMethod(month, "methodTest", "this is test");
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
	}

	public static void wrapBean()
	{
		Month month = new Month(1, "dddddd");
		DynaBean wrapper = new WrapDynaBean(month);
		String name = (String)wrapper.get("name");
		System.out.println("wrapBean()===" + name);
	}

	public static void dynaBean()
	{
		DynaProperty[] props = new DynaProperty[]{new DynaProperty("address", java.util.Map.class), new DynaProperty("subordinate", Month.class), new DynaProperty("firstName", String.class), new DynaProperty("lastName", String.class)};
		BasicDynaClass dynaClass = new BasicDynaClass("employee", null, props);
		try
		{
			DynaBean employee = dynaClass.newInstance();
			employee.set("address", new HashMap());
			employee.set("subordinate", new Month(1, "dynaBean"));
			employee.set("firstName", "Fred");
			employee.set("lastName", "Flintstone");
			System.out.println(PropertyUtils.getNestedProperty(employee, "subordinate.name"));

		}
		catch(Exception e)
		{
			e.printStackTrace();
		}

	}

	public static void convertUtils()
	{
		String value = "111";
		Integer it = (Integer)ConvertUtils.convert(value, Integer.class);
		System.out.println("value==" + it.intValue());
	}

	public static void putProperty()
	{
		Month month = new Month(1, "dddddd");
		HashMap map = new HashMap();
		map.put("value", "99999");
		map.put("name", "this is test");
		try
		{
			BeanUtils.populate(month, map);// it will use ConvertUtils for convertings
			System.out.println("name==" + month.getValue());
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
	}

	public static void lazyBean()
	{
		LazyDynaMap dynaBean1 = new LazyDynaMap();
		dynaBean1.set("foo", "bar"); // simple
		dynaBean1.set("customer", "title", "Mr"); // mapped
		dynaBean1.set("address", 0, "address1"); // indexed
		System.out.println(dynaBean1.get("address", 0));
		Map myMap = dynaBean1.getMap(); // retrieve the Map 
		System.out.println(myMap.toString());
		dynaBean1.setReturnNull(true);//设为ture。若Bean中没有此字段，返回null
		//默认为false。若Bean中没有此字段，自动增加一个：）
		System.out.println(dynaBean1.get("aaa"));//此时返回null
		//默认为false，允许增删和修改
		dynaBean1.setRestricted(true);
		//dynaBean1.set("test", "error");//这里会出错！

	}

	public static void main(String[] args)
	{
		//describe();
		//getProperty();
		//copyProperties();
		//createObj();
		//methodObj();
		//wrapBean();
		//dynaBean();
		//convertUtils();
		//putProperty();
		lazyBean();
	}
}