反射获取方法传入多参数方法

• 反射传人多参数方法
• 一、单个方法传入多参数？
• • 1.创建一个方法
  • 2.创建一个调用方法的主方法
• 二丶读取本地文件的方式
• 三丶强转来实现接口的方法
• • 1.写一个方法的接口
  • 2.写一个实现类方法
• 注意(shorten commond line)
• 总结

package com.system.modules.admin.product.service;
import java.util.Arrays;


public class Test3 {
    public void method(Object... objs) {
        System.out.println(Arrays.deepToString(objs));
    }
}

package com.system.modules.admin.product.service;
import java.lang.reflect.Array;
import java.lang.reflect.Method;


public class Reflect {
    public static void main(String[] args) throws Exception {
        String className = "com.system.modules.admin.product.service.Test3";
        Class clazz = Class.forName(className);
        Test3 test3 = (Test3) clazz.newInstance();
        //Method method = clazz.getDeclaredMethod("method", Object[].class);
        Method method = clazz.getDeclaredMethod("method", Array.newInstance(Object.class, 0).getClass());
        method = clazz.getDeclaredMethod("method", (new Object[0]).getClass());
//        Method[] declaredMethods = clazz.getDeclaredMethods();//多个方法获取
        Object[] objects = {1, "fuck"};
        method.invoke(test3, new Object[]{ objects });
    }
}

上面第一个方法拿来改下对象名就可以用

package com.system.modules.admin.product.service;
import cn.hutool.core.compiler.JavaSourceCompiler;
import cn.hutool.core.io.FileUtil;
import cn.hutool.core.io.resource.StringResource;
import cn.hutool.core.util.ClassLoaderUtil;
import java.lang.reflect.Array;
import java.lang.reflect.Method;


public class Test2 {
    public static void main(String[] args) throws Exception{
        String s = FileUtil.readUtf8String("E:\opt\Test1.java");
        Class clazz = ss(s);
        Test1 test1 = (Test1) clazz.newInstance();
        //Method method = clazz.getDeclaredMethod("don", Object[].class);
        Method method = clazz.getDeclaredMethod("don", Array.newInstance(Object.class, 0).getClass());
        method = clazz.getDeclaredMethod("don", (new Object[0]).getClass());
//        Method[] declaredMethods = clazz.getDeclaredMethods();//多个方法获取
        Object[] objects = {1, "fuck"};
        method.invoke(test1, new Object[]{ objects });
    }

    private static Class ss(String srcCode) throws ClassNotFoundException {
        ClassLoader classLoader = JavaSourceCompiler.create(ClassLoaderUtil.getClassLoader())
                .addSource(new StringResource(srcCode, CompileUtil.getFullClassName(srcCode)))
                .compile();
        return classLoader.loadClass(CompileUtil.getFullClassName(srcCode));
    }
}

package com.system.modules.admin.product.service;

import java.util.Arrays;

public interface Test0 {
    public void don(Object...objects);
}

package com.system.modules.admin.product.entity;

import com.system.modules.admin.product.service.Test0;

import java.util.Arrays;


public class Test1 implements Test0 {

    @Override
    public void don(Object... objects) {
        System.out.println(Arrays.deepToString(objects));
    }
}

package com.system.modules.admin.product.service;
import cn.hutool.core.compiler.JavaSourceCompiler;
import cn.hutool.core.io.FileUtil;
import cn.hutool.core.io.resource.StringResource;
import cn.hutool.core.util.ClassLoaderUtil;
import java.lang.reflect.Array;
import java.lang.reflect.Method;


public class Test2 {
    public static void main(String[] args) throws Exception{
//      String className = "com.system.modules.admin.product.entity.Test1";
        String s = FileUtil.readUtf8String("E:\opt\Test1.java");
        Class clazz = get1(s);
        Test0 obj = (Test0)clazz.newInstance();
        //Method method = clazz.getDeclaredMethod("don", Object[].class);
//        Method method = clazz.getDeclaredMethod("don", Array.newInstance(Object.class, 0).getClass());
//        method = clazz.getDeclaredMethod("don", (new Object[0]).getClass());
        Method[] declaredMethods = clazz.getDeclaredMethods();//多个方法获取
        Object[] objects = {1, "fuck"};
//        method.invoke(obj, new Object[]{ objects });
        obj.don(objects);
    }
    private static Class get1(String srcCode) throws ClassNotFoundException {
        ClassLoader classLoader = JavaSourceCompiler.create(ClassLoaderUtil.getClassLoader())
                .addSource(new StringResource(srcCode, CompileUtil.getFullClassName(srcCode)))
                .compile();
        return classLoader.loadClass(CompileUtil.getFullClassName(srcCode));
    }
}

none:这是默认选项。IDE不会缩短长类路径。如果命令行超出操作系统限制，则IDEA将无法运行您的应用程序
jar manifest:IDE通过临时classpath.jar传递长类路径。原始类路径在MANIFEST.MF中定义为classpath.jar中的类路径属性
classpath file:IDE将把长类路径写入文本文件

jar manifest会导致程序包com.system.modules.admin.product.service不存在

今日诗句
会当凌绝顶，一览众山小