反射-Method-Java

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
 * Created with IDEA
 * author:foreign
 * Date:2019/9/30
 * Time:10:40
 */
public class ReflectionFk {
    public static void main(String[] args) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
        Class clazz = PersonFk.class;
        //1 获取所有的public的方法
        Method[] methods = clazz.getMethods();
        for (Method method : methods) {
            System.out.println("public的方法：" + method);
        }
        //1.1 获取指定的方法
        Method setName = clazz.getMethod("setName", new Class[]{String.class});
        System.out.println("获取指定的方法：" + setName);
        //1.2 获取指定的无参数方法
        Method getName = clazz.getMethod("getName", null);
        System.out.println("获取无参数的方法：" + getName);
        //2 获取方法的参数
        Method setAge = clazz.getMethod("setAge", new Class[]{Integer.class});
        Class<?>[] parameterTypes = setAge.getParameterTypes();
        for (Class parameter : parameterTypes) {
            System.out.println("获取方法参数的类型：" + parameter);
        }
        //3 获取方法的返回类型
        Class<?> returnType = setAge.getReturnType();
        System.out.println("方法的返回类型：" + returnType);
        //4 通过method调用非静态方法
        PersonFk personFk = new PersonFk();
        Method setAge1 = clazz.getMethod("setAge", new Class[]{Integer.class});
        Object invoke = setAge1.invoke(personFk, Integer.class);
        System.out.println("调用非静态方法：" + invoke);
        //4.1 通过method的静态方法,如果setGender为静态方法，则第一个参数传入null即可
        Method setGender = clazz.getMethod("setGender", Boolean.class);
        Object invoke1 = setGender.invoke(null, true);
        System.out.println("调用静态方法：" + invoke1);
    }
}

实体类

/**
 * Created with IDEA
 * author:foreign
 * Date:2019/9/30
 * Time:10:39
 */
public class PersonFk {
    private String name;
    private Integer age;
    private Boolean gender;
    public String desc;

    public PersonFk(String name, Integer age, Boolean gender, String desc) {
        this.name = name;
        this.age = age;
        this.gender = gender;
        this.desc = desc;
    }

    public PersonFk() {
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public Boolean getGender() {
        return gender;
    }

    public void setGender(Boolean gender) {
        this.gender = gender;
    }

    public String getDesc() {
        return desc;
    }

    public void setDesc(String desc) {
        this.desc = desc;
    }
}