两个反射的小例子

HashMap map = new HashMap();

Class c = this.getClass();

// 根据子类声明的field循环取值
for (int i = 0; i < c.getDeclaredFields().length; i++) {

try {
// 获取field
Field f = c.getDeclaredFields()[i];

String key = f.getName();

// 执行对应的get方法
String method = "get" + key.substring(0, 1).toUpperCase() + key.substring(1);

Class pTypes[] = new Class[0];

Method myMethod = c.getMethod(method, pTypes);

Object[] arg = new Object[0];

Object res = myMethod.invoke(this, arg);

// 保存
map.put(key, res);

} catch (Exception e) {
// 返回空
return null;
}
}
return map;


Map hashMap = new HashMap();
try {
Class c = obj.getClass();
Method m[] = c.getDeclaredMethods();
for (int i = 0; i < m.length; i++) {
if (m[i].getName().indexOf("get")==0) {
//System.out.println("方法名："+m[i].getName());
// System.out.println("值："+ m[i].invoke(obj, new Object[0]));
hashMap.put(m[i].getName(), m[i].invoke(obj, new Object[0]));
}
}
} catch (Throwable e) {
System.err.println(e);
}
return hashMap;