Java Swing使用注解绑定事件监听

首先创建一个注解，目前只实现了一个点击事件，其他的原理相同

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface OpActionListener
{
      String value();
}

package com.demo.inject;

import com.demo.annotation.OpActionListener;
import java.awt.event.ActionListener;
import java.lang.reflect.*;

/**
 * User: jay.zhoujingjie
 * Date: 14-2-17
 * Time: 下午5:18
 */
public class ActionListenerAttach
{
    private Object obj;
    public ActionListenerAttach(Object obj){
        this.obj =obj;
         for(Method method: obj.getClass().getDeclaredMethods()){
             OpActionListener ann = method.getAnnotation(OpActionListener.class);
             if(ann != null){
                 String value = ann.value();
                 try
                 {
                     Field field = obj.getClass().getDeclaredField(value);
                     if(!field.isAccessible()){
                         field.setAccessible(true);
                         addListener(field.get(obj),method);
                     }
                 } catch (Exception e)
                 {
                     e.printStackTrace();
                 }
             }
         }
    }

    public void addListener(final Object source,final Method m) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException
    {
        Object listener = Proxy.newProxyInstance(obj.getClass().getClassLoader(),new Class[]{ActionListener.class},new InvocationHandler() {
            @Override
            public Object invoke(Object proxy, Method method, Object[] args) throws Throwable
            {
                if(m.getParameterTypes().length == 0){
                    return m.invoke(obj);
                }
                return m.invoke(obj,args);
            }
        });
       source.getClass().getMethod("addActionListener",ActionListener.class).invoke(source, listener);
    }
}

public class LoginFrame extends ParentFrame
{
	private JTextField		tfName;
	private JPasswordField	pfPass;
	private JButton	     btnLogin;
	
	public LoginFrame()
	{
        initUI();
        new ActionListenerAttach(this);
	}
	private void initUI()
	{
		Container container = this.getContentPane();
		this.setLayout(new GridBagLayout());
		container.add(new JLabel("用户名:"), gbc(0, 0, 1, 1));
		container.add(tfName = new JTextField(10), gbc(1, 0, 3, 1));
		container.add(new JLabel("密    码:"), gbc(0, 1, 1, 1));
		container.add(pfPass = new JPasswordField(10), gbc(1, 1, 3, 1));
		container.add(btnLogin = new JButton("登陆"), gbc(1, 2, 2, 1));
		this.setSize(200, 150);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setVisible(true);
	}


    @OpActionListener("btnLogin")
    public void click(){
        JOptionPane.showMessageDialog(null, tfName.getText() + "\n" + String.valueOf(pfPass.getPassword()));
    }
    @OpActionListener("btnLogin")
    public void click(ActionEvent event){
        JOptionPane.showMessageDialog(null, tfName.getText() + "\n" + String.valueOf(pfPass.getPassword()));
    }
}

Java Swing使用注解绑定事件监听

原文：http://blog.csdn.net/sc_jelly/article/details/19345989