使用Java的反射调用方法应注意的异常处理

 1import java.lang.reflect.Method;
 2/**
 3 * @author Unmi
 4 */
 5public class ExceptionTest {
 6
 7   public static void main(String[] args) {
 8      try{
 9         foo1();
10      }catch (MyException me) {
11         System.out.println("Exception Type: MyException");
12      }catch (Exception e) {
13         System.out.println("Exception Type: Exception");
14      }
15   }
16
17   public static void foo1() throws Exception{
18      Method method = ExceptionTest.class.getDeclaredMethod("foo2",new Class[]{});
19
20      //注意调用foo2时，foo2方法会抛出MyException异常
21      method.invoke(null,new Object[]{});
22   }
23
24   public static void foo2() throws Exception{
25      throw new MyException(); //foo2方法直接抛出异常
26   }
27}
28
29//一个自定义的异常
30class MyException extends Exception{
31
32}

1method.invoke(null,new Object[]{});

1try{
2    method.invoke(null,new Object[]{});
3}catch (InvocationTargetException ite) {
4    //确定实际引发异常MyException,Exception子类，所以强型转换
5    throw (Exception)ite.getTargetException();
6}