获取Java/Kotlin类的所有方法签名

MethodSignKotlinUtils(Kotlin)

需要依赖: implementation "org.jetbrains.kotlin:kotlin-reflect:1.4.21"

import kotlin.reflect.KClass
import kotlin.reflect.full.*

/**
 * # 获取Kotlin类的所有方法签名
 *
 * - 需要依赖: implementation "org.jetbrains.kotlin:kotlin-reflect:1.4.21"
 *
 * 1. 获取Java类的所有方法签名 https://blog.csdn.net/weixin_38106322/article/details/108218774
 *
 * 2. Kotlin反射 https://www.jianshu.com/p/63da6197913b
 */
object MethodSignKotlinUtils {
    @JvmStatic
    fun main(args: Array<String>) {
        printMethodSignForKotlin(TestReflect::class)
    }

    private fun printMethodSignForKotlin(clazz: KClass<*>) {
        println("-------------------------------------------------------------")
        //获取该对象声明的全部方法
        //fun com.ando.file.sample.TestReflect.see(): kotlin.String 去掉包名简化 fun see(): kotlin.String
        val declaredFunctions = clazz.declaredFunctions
        declaredFunctions.forEach {
            val prefix = "${clazz.qualifiedName}."
            var func = "$it"
            func = func.replace(prefix, "")
            println(func)
        }
        println("-------------------------------------------------------------")
    }
}

🌴 如果是Android Studio, 执行Run.... with Coverage

🍎 运行结果

会报一堆Class data was not extracted不用管.

MethodSignJavaUtils(Java)

import java.lang.reflect.Method;
import java.lang.reflect.Modifier;

/**
 * 获取Java类的所有方法签名
 * <p>
 * https://blog.csdn.net/weixin_38106322/article/details/108218774
 */
public class MethodSignJavaUtils {

    public static void main(String[] args) {
        printMethodSign(new String("666"));
    }

    private static <T> void printMethodSign(T t) {
        //获取对象类信息
        Class<?> aClass = t.getClass();
        //获取类中方法
        Method[] methods = aClass.getDeclaredMethods();
        //遍历方法
        System.out.println("-------------------------------------------------------------");
        for (Method method : methods) {
            //获取方法修饰符
            String mod = Modifier.toString(method.getModifiers());
            //先拼接修饰符+方法名+'('
            System.out.print(mod + " " + method.getName() + "(");
            //获取方法参数类型
            Class<?>[] parameterTypes = method.getParameterTypes();
            //如果没有参数，那就直接拼接上+')'
            if (parameterTypes.length == 0) {
                System.out.print(")");
            } else {
                //有参数则遍历
                for (int i = 0; i < parameterTypes.length; i++) {
                    //没到最后一位参数，都用','，否则使用')'最收尾
                    char end = i == parameterTypes.length - 1 ? ')' : ',';
                    //输出参数
                    System.out.print(parameterTypes[i].getSimpleName() + end);
                }
            }
            //为每个方法换行
            System.out.println();
        }
        System.out.println("-------------------------------------------------------------");
    }
}

🍎 运行结果

附TestReflect

class TestReflect {
    init {
        val holiday: Int = 1992
    }

    companion object {
        const val DEFAULT_NAME = "Tony"
        lateinit var hobby: String

        fun sleep(): Boolean {
            return false
        }
    }

    constructor()

    constructor(name: String)

    private var title: String? = null

    val age: String by lazy { "18" }

    fun say(): Int {
        return 1
    }

    fun say(block: (text: String) -> Boolean) {}

    private fun see(): String {
        return ""
    }
}

参考

• 获取Java类的所有方法签名 blog.csdn.net/weixin_3810…

• Kotlin反射 www.jianshu.com/p/63da61979…