java">package com.hx.utils;import com.hx.bean.Student;
import org.springframework.core.LocalVariableTableParameterNameDiscoverer;import java.lang.reflect.*;/*** 反射应用*/
public class MyReflect {public static void main(String[] args) {
//        cancelAccess();getMethodInfo();}public static void getMethodInfo() {try {Class<?> cls = Class.forName("com.hx.bean.Student");Field[] fields = cls.getFields();//只能获取公有的成员变量for (int i = 0; i < fields.length; i++) {System.out.println("获取到公有的成员变量：" + fields[i].getName());}System.out.println("************以下是获取方法的参数名、参数类型");Method[] methods = cls.getMethods();for (Method method : methods) {String methodName = method.getName();if (!"add".equals(methodName)) {continue;}Parameter[] parameters = method.getParameters();for (int i = 0; i < parameters.length; i++) {String name = parameters[i].getType().getName();System.out.println(methodName + "的第" + (i + 1) + "个入参名为：" + parameters[i].getName() + " 参数类型为：" + name);}}} catch (ClassNotFoundException e) {throw new RuntimeException(e);}}public static void cancelAccess() {//通过反射创建对象try {Class studentClass = Student.class;Constructor c = studentClass.getConstructor(String.class, String.class, int.class);Object obj = c.newInstance("小明", "1001", 18);//通过属性名获取field对象Field f = studentClass.getDeclaredField("name");//取消属性访问权限控制
//            f.setAccessible(true);//获取更改前name的值System.out.println("更改前:" + f.get(obj));System.out.println(obj);f.set(obj, "小刚");System.out.println("更改后:" + f.get(obj));System.out.println(obj);} catch (Exception e) {throw new RuntimeException(e);}}}

返回结果

获取到公有的成员变量：sex
获取到公有的成员变量：age
************以下是获取方法的参数名、参数类型
add的第1个入参名为：x 参数类型为：int
add的第2个入参名为：y 参数类型为：intProcess finished with exit code 0