范型是这样的-3

最后贴一段代码，某高人写的，卡卡

import java.io.IOException;
import java.io.Serializable;
import java.io.Writer;
import java.lang.reflect.GenericArrayType;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.lang.reflect.WildcardType;
import java.util.ArrayList;
import java.util.List;

/*******************************************************************************
 * 
 * 
 * @作者：XXX
 * @日期：2007-3-11
 * @版权：北京易迈普技术有限公司版权所有
 ******************************************************************************/
public class GenericsTypeScanner {
	private Writer writer;

	public GenericsTypeScanner() {

	}

	/**
	 * scan a generic class,output the originate declaration to the destination
	 * writer。
	 * 
	 * @param writer
	 * @param clazz
	 */
	public void 扫描(Writer writer, Class clazz) {
		this.writer = writer;
		try {
			printClass(clazz);

			for (Method method : clazz.getDeclaredMethods())
				printMethod(method);
		} catch (IOException e) {
			e.printStackTrace(System.out);

		}

	}

	private void printClass(Class clazz) throws IOException {
		writer.write(clazz.getName());
		printTypes(clazz.getTypeParameters(), "</span><span>",
				"</span><span class=\"string\">",
				"</span><span>, </span><span class=\"string\">");

		// scan the super class
		Type superClazz = clazz.getGenericSuperclass();
		if (superClazz != null) {
			writer.write(" extends ");
			printType(superClazz);
		}

		// scan the interfaces
		printTypes(clazz.getGenericInterfaces(), " implements ", ",", "");

		writer.write("\n");
	}

	private void printMethod(Method method) throws IOException {
		String name = method.getName();
		writer.write(Modifier.toString(method.getModifiers()));
		writer.write(" ");
		printTypes(method.getTypeParameters(), "</span><span>",
				"</span><span class=\"string\">",
				"</span><span>, </span><span class=\"string\">");

		printType(method.getGenericReturnType());

		writer.write(" ");
		writer.write(name);
		writer.write("(");
		printTypes(method.getGenericParameterTypes(), "", ", ", "");
		writer.write(")\n");

	}

	private void printTypes(Type[] types, String prefix, String seperator,
			String suffix) throws IOException {
		if (types.length > 0)
			writer.write(prefix);
		for (int i = 0; i < types.length; i++) {
			if (i > 0)
				writer.write(seperator);
			printType(types[i]);
		}
		if (types.length > 0)
			writer.write(suffix);
	}

	private void printType(Type type) throws IOException {
		if (type instanceof Class) {
			Class t = (Class) type;
			writer.write(t.getName());
		} else if (type instanceof TypeVariable) {
			TypeVariable t = (TypeVariable) type;
			writer.write(t.getName());
			printTypes(t.getBounds(), " extends ", ",", "");
		} else if (type instanceof WildcardType) {
			WildcardType t = (WildcardType) type;
			writer.write("?");
			printTypes(t.getLowerBounds(), " extends ", " & ", "");
			printTypes(t.getUpperBounds(), " super ", " & ", "");
		} else if (type instanceof ParameterizedType) {
			ParameterizedType t = (ParameterizedType) type;
			Type owner = t.getOwnerType();
			if (owner != null) {
				printType(owner);
				writer.write(".");
			}
			printType(t.getRawType());
			printTypes(t.getActualTypeArguments(), "</span><span>",
					"</span><span class=\"string\">",
					"</span><span>, </span><span class=\"string\">");
		} else if (type instanceof GenericArrayType) {
			GenericArrayType t = (GenericArrayType) type;
			printType(t.getGenericComponentType());
			writer.write("[]");
		}
	}
}