JAVA 反射 invoke方法的使用

package reflect;

public class UserBean {
	
	private int userId;

	private String userName;

	public int getUserId() {
		return userId;
	}

	public void setUserId(int userId) {
		this.userId = userId;
	}

	public String getUserName() {
		return userName;
	}

	public void setUserName(String userName) {
		this.userName = userName;
	}

}

package reflect;

import java.beans.IntrospectionException;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class TestInvoke {
	public static void main(String[] args) {
		try {
			Class c = Class.forName("reflect.UserBean");
			Field[] fields = c.getDeclaredFields();
			Object obj = c.newInstance();
			for (Field f : fields) {//写值 set方法
				PropertyDescriptor pd = new PropertyDescriptor(f.getName(), c);
				Method method = pd.getWriteMethod();
				if (method.getParameterTypes()[0].equals(Integer.TYPE)) {
					method.invoke(obj, 24);
				} else {
					method.invoke(obj, "Kobe");
				}

			}
			for (Field f : fields) {//读值 get方法
				PropertyDescriptor pd = new PropertyDescriptor(f.getName(), c);
				Method method = pd.getReadMethod();
				Object result = method.invoke(obj);
				System.out.println(result);

			}
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (IntrospectionException e) {
			e.printStackTrace();
		} catch (InstantiationException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			e.printStackTrace();
		}
	}

}

评论

2 楼 lmjavajas 2012-04-10  

1 楼 尹鹏波 2012-01-18  

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