1 import java.io.FileInputStream; 2 import java.io.InputStream; 3 import java.lang.reflect.Constructor; 4 import java.lang.reflect.InvocationTargetException; 5 import java.lang.reflect.Method; 6 import java.util.ArrayList; 7 import java.util.List; 8  9 import org.junit.Test;10 11 public class Demo {12 13     /**14      * 反射类的方法15      * @throws Exception 16      *17      */18 19     //public void method(){20     @Test21     public void test1() throws Exception{22         23         Person p = new Person();24         25         Class clazz = Class.forName("Person");26         27         Method method = clazz.getMethod("method", null);28         29         method.invoke(p, null);30         31     }32     33     //public void method(String name,int password){34     @Test35     public void test2() throws Exception{36         37         Person p = new Person();38         39         Class clazz = Class.forName("Person");40         41         Method method = clazz.getMethod("method", String.class,int.class);42         43         method.invoke(p, "zero",28);44         45     }46     47     //public Class[] method(String name,int[] password){48     @Test49     public void test3() throws Exception{50         51         Person p = new Person();52         53         Class clazz = Class.forName("Person");54         55         Method method = clazz.getMethod("method", String.class,int[].class);56         57         Class[] cs = (Class[]) method.invoke(p, "one",new int[]{1,2,3});58         59         System.out.println(cs[0]);60     }61     62     //public void method(InputStream in){63     @Test64     public void test4() throws Exception{65         66         Person p = new Person();67         68         Class clazz = Class.forName("Person");69         70         Method method = clazz.getDeclaredMethod("method", InputStream.class);71         72         method.setAccessible(true);73         74         method.invoke(p, new FileInputStream("c:\\1.txt"));75     }76     77     //public static void method(int num){78     @Test79     public void test5() throws Exception{80         81         Class clazz = Class.forName("Person");82         83         Method method = clazz.getMethod("method", int.class);84         85         method.invoke(null,29);86     }87     88     //调用main方法89     @Test90     public void test6() throws Exception{91         92         Class clazz = Class.forName("Person");93         94         Method method = clazz.getMethod("main", String[].class);95         96         method.invoke(null,(Object)new String[]{"aa","bb"});97     }98 }

 1 import java.io.InputStream; 2 import java.util.List; 3  4  5 public class Person { 6      7     public String name="hellowrold"; 8     private int password; 9     private static int age;10 11     public Person(){12         System.out.println("person");13     }14     15     public Person(String name){16         System.out.println("person :"+name);17     }18     19     public Person(String name,int password){20         System.out.println("person:"+name+password);21     }22     23     private Person(List list){24         System.out.println("list");25     }26     27     public void method(){28         System.out.println("eai1");29     }30     31     public void method(String name,int password){32         System.out.println("method"+name+password);33     }34     35     public Class[] method(String name,int[] password){36         return new Class[]{String.class};37     }38     39     public void method(InputStream in){40         System.out.println(in);41     }42     43     public static void method(int num){44         System.out.println(num);45     }46     47     public static void main(String[] args){48         System.out.println("main");49     }50     51 }