反射应用

反射工具

import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Vector;

import com.test.fanshe.TestFanShe;

/**
 * java.lang.reflect
 * 反射测试
 * @author 房金玮
 *
 */
public class ReflectUtil {
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		String className="com.test.fanshe.TestFanShe";
		
		
		//参数必须是对象类型	不支持数组	将对象序列化到数据库中
//		classInstanceForMethodByParameter(className,"testPringMap",map);
//		classInstanceForMethodByParameter(className,"testPrintString","房子");
		
		//测试方法重载
		classInstanceForMethodByParameter(className,"testPrintString",new Object[]{1,""});
	}
	public static void classInstanceForMethodByParameter(String className,String methodStr,Object[] parameter){
		try {
			Class calss=Class.forName(className);
			Method[] methods=calss.getMethods();
			Class[] parameterTypes=null;
			for(Method method:methods){
				if(method.getName().equals(methodStr)){
					Class[] parameterTypesNow=method.getParameterTypes();
					if(parameterTypesNow.length==parameter.length){
						boolean flg=true;
						for(int i=0;i<parameter.length;i++){
							if(!parameterTypesNow[i].equals(parameter[i].getClass())){
								flg=false;
								break;
							}
						}
						if(flg){
							parameterTypes=parameterTypesNow;
						}
					}
				}
				if(parameterTypes!=null){
					break;
				}
			}
			try {
				//执行有参数的构造方法
				Method method = calss.getMethod(methodStr, parameterTypes);
				method.invoke(calss.newInstance(), parameter);
			} catch (Exception e) {
				// TODO: handle exception
				e.printStackTrace();
			}
//			try {
//				//执行无参数方法
//				Method method = calss.getMethod(methodStr, new Class[]{});
//				method.invoke(calss.newInstance(), new Object[]{});
//			} catch (Exception e) {
//				// TODO: handle exception
//				e.printStackTrace();
//			}
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

 

 

测试类

 

package com.test.fanshe;

import java.util.Iterator;
import java.util.Map;

public class TestFanShe {
	public String namepublic;
	public String getNamepublic() {
		return namepublic;
	}

	public void setNamepublic(String namepublic) {
		this.namepublic = namepublic;
	}
	private String name;
	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}
	
	public void testPrintString(){
		System.out.println("testPrintString:");
	}
	public void testPrintString(String name){
		System.out.println("testPrintString:name");
	}
	public void testPrintString(String name,Integer intstr){
		System.out.println("testPrintString:String name,Integer intstr");
	}
	public void testPrintString(Integer intstr,String name){
		System.out.println("testPrintString:Integer intstr,String name");
	}
	public void testPringMap(Map map){
		Iterator<String> iterator=null;
		for(iterator=map.keySet().iterator();iterator.hasNext();){
			System.out.println(map.get(iterator.next()));
		}
	}
	@Override
	public String toString() {
		// TODO Auto-generated method stub
		return this.getClass().getName()+"@"+"namepublic:"+this.namepublic+"&name:"+this.name;
	}
	
}

 

评论

1 楼 ruanjiangjx 2010-12-15  

重新修改了方法，支持  方法重载功能！