[PHP知识库]java反射机制实现简单的反编译

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import java.io.*;
import java.lang.reflect.*;
import java.util.*;

public class Test {
    public static void main(String[] args){
        ResourceBundle bundle = ResourceBundle.getBundle("user");
        Class c1 = null;
        try {
            c1 = Class.forName(bundle.getString("classValue"));
            StringBuffer buffer = new StringBuffer();
            Class[] classes = c1.getInterfaces();
            for (Class c : classes){
                buffer.append(c.getSimpleName());
                buffer.append(", ");
            }
            if (classes.length > 0){
                buffer.deleteCharAt(buffer.length() - 1);
                buffer.deleteCharAt(buffer.length() - 1);
            }
            System.out.println(Modifier.toString(c1.getModifiers())
                    + " class " + c1.getSimpleName()
            + " extends " + c1.getSuperclass().getSimpleName()
            + " implements " + buffer + " {");
            Field[] field = c1.getDeclaredFields();
            for (Field f : field){
                System.out.println("\t" + Modifier.toString(f.getModifiers())
                        + " " + f.getType().getSimpleName()
                        + " " + f.getName());
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        System.out.println();
        Constructor[] constructor = c1.getConstructors();
        for (Constructor c : constructor){
            StringBuffer buffer1 = new StringBuffer();
            Class[] parameter = c.getParameterTypes();
            for (Class p : parameter) {
                buffer1.append(p.getSimpleName());
                buffer1.append(", ");
            }
            String str = null;
            if (parameter.length > 0){
                str = buffer1.substring(0, buffer1.length() - 2);
            }
            System.out.println( "\t" + Modifier.toString(c.getModifiers())
            + " " + c1.getSimpleName() + "(" + str + ")");
        }
        System.out.println();
        Method[] method = c1.getDeclaredMethods();
        for (Method m : method){
            StringBuffer buffer2 = new StringBuffer();
            Class[] parameter = m.getParameterTypes();
            for (Class c : parameter){
                buffer2.append(c.getSimpleName());
                buffer2.append(", ");
            }
            String str = null;
            if (parameter.length > 0){
                str = buffer2.substring(0, buffer2.length() - 2);
            }
            System.out.println("\t" + Modifier.toString(m.getModifiers())
            + " " + m.getReturnType().getSimpleName()
            + " " + m.getName() + "(" + str + ")");
        }
        System.out.println("}");
    }
}