[反射初探]根据反射获取类中参数类型及参数名和参数值

public String getMyDeclaredMethods(T t) {Class<?> c = t.getClass();Method m[] = c.getDeclaredMethods();String text = "";String n = c.getCanonicalName();for (int i = 0; i < m.length; i++) {// Method.getModifiers()表示修饰符 比如public 返回的是int类型 对应表如下：// PUBLIC: 1// PRIVATE: 2// PROTECTED: 4// STATIC: 8// FINAL: 16// SYNCHRONIZED: 32// VOLATILE: 64// TRANSIENT: 128// NATIVE: 256// INTERFACE: 512// ABSTRACT: 1024// STRICT: 2048// Field.getModifiers()作用同上text = text + m[i].getModifiers() + "   " + m[i].getReturnType()+ "   " + m[i].getName() + "\n";}// 也可以用getFields 不过这个方法只能返回修饰为public的参数Field[] fields = t.getClass().getDeclaredFields();// 获取public private// protect声明的属性的数组for (Field field : fields) {try {field.setAccessible(true);// 暴力反射；// field.getType()获取参数类型 ；field.getName()获取参数名 ；field.get(t)获取参数text = text + field.getType() + "  " + field.getName() + "  "+ field.get(t).toString() + "\n";if (field.getType() == String.class)// 比较字节码用=={String oldValue;oldValue = (String) field.get(t);String newValue = oldValue.replace('b', 'a');field.set(t, newValue);// 往该参数里输入参数} else if (field.getName().equals("a")) {field.set(t, 2);}} catch (IllegalAccessException e1) {// TODO Auto-generated catch blocke1.printStackTrace();} catch (IllegalArgumentException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}}return text + n + "\n" + t.toString();}