创建动态类及查看其方法列表信息 - 黑马程序员技术交流社区

package cn.itcast.day3;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.Collection;
public class ProxyTest {
/**
* @param args
*/
public static void main(String[] args) {
/**
* 创建动态类及查看其方法列表信息,打印格式：
* Constructor()
* Constructor(InvocationHandler,int)
*/
Class clazzProxy = Proxy.getProxyClass(Collection.class.getClassLoader(), Collection.class);
System.out.println(clazzProxy.getName());
System.out.println("-----------starting constructors list-------------------");
Constructor[] constructors = clazzProxy.getConstructors();
for(Constructor constructor : constructors){
String name = constructor.getName();
StringBuilder sBuilder = new StringBuilder(name);
sBuilder.append('(');
Class[] classParams = constructor.getParameterTypes();
for(Class classParam : classParams){
sBuilder.append(classParam.getName()).append(',');
}
if(classParams!=null && classParams.length!=0){
sBuilder.deleteCharAt(sBuilder.length()-1);
}
sBuilder.append(')');
System.out.println(sBuilder);
}
System.out.println("-----------starting methods list-------------------");
Method[] methods = clazzProxy.getMethods();
for(Method method : methods){
String name = method.getName();
StringBuilder sBuilder = new StringBuilder(name);
sBuilder.append('(');
Class[] classParams = method.getParameterTypes();
for(Class classParam : classParams){
sBuilder.append(classParam.getName()).append(',');
}
if(classParams!=null && classParams.length!=0){
sBuilder.deleteCharAt(sBuilder.length()-1);
}
sBuilder.append(')');
System.out.println(sBuilder);
}
}
}

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