写一个工具类Utils， 1.能实现调用对象中指定方法名字和参数列表方法的调用 2.实现给指定对象任意属性的赋值操作用java代码

### 回答1：

public class Utils {
public static void invokeMethod(Object object, String methodName, Object[] params) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
Method method = object.getClass().getDeclaredMethod(methodName, getParamTypes(params));
method.invoke(object, params);
} public static Class<?>[] getParamTypes(Object[] params) {
Class<?>[] paramTypes = new Class<?>[params.length];
for (int i = 0; i < params.length; i++) {
paramTypes[i] = params[i].getClass();
} return paramTypes;
} public static void setProperty(Object object, String property, Object value) throws NoSuchFieldException, IllegalAccessException {
Field field = object.getClass().getDeclaredField(property);
field.setAccessible(true);
field.set(object, value);
}
}

### 回答2：
工具类Utils的设计如下：

1. 实现调用对象中指定方法名字和参数列表方法的调用：

   public class Utils {
       public static Object invokeMethod(Object obj, String methodName, Object... args) 
               throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
           Class<?>[] parameterTypes = new Class<?>[args.length];
           for (int i = 0; i < args.length; i++) {
               parameterTypes[i] = args[i].getClass();
           }
           Method method = obj.getClass().getMethod(methodName, parameterTypes);
           return method.invoke(obj, args);
       }
   }

2. 实现给指定对象任意属性的赋值操作：

   import java.lang.reflect.Field;

   public class Utils {
       public static void setProperty(Object obj, String propertyName, Object value) 
               throws NoSuchFieldException, IllegalAccessException {
           Field field = obj.getClass().getDeclaredField(propertyName);
           field.setAccessible(true);
           field.set(obj, value);
       }
   }

使用示例：

public class MyClass {
    private String name;
    private int age;
    
    public void setName(String name) {
        this.name = name;
    }
    
    public void setAge(int age) {
        this.age = age;
    }
    
    public String getName() {
        return name;
    }
    
    public int getAge() {
        return age;
    }
}

public class Main {
    public static void main(String[] args) {
        MyClass obj = new MyClass();

        try {
            Utils.invokeMethod(obj, "setName", "John");
            Utils.invokeMethod(obj, "setAge", 25);

            Utils.setProperty(obj, "name", "Peter");
            Utils.setProperty(obj, "age", 30);

            System.out.println(Utils.invokeMethod(obj, "getName"));  // Output: Peter
            System.out.println(Utils.invokeMethod(obj, "getAge"));   // Output: 30
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

以上代码演示了如何使用Utils工具类来调用对象中指定方法的方法，以及给指定对象的属性赋值的操作。

### 回答3：
工具类Utils：
1. 能实现调用对象中指定方法名字和参数列表方法的调用：

import java.lang.reflect.Method;

public class Utils {
    public static Object invokeMethod(Object object, String methodName, Object... args) throws Exception {
        Class<?> clazz = object.getClass();
        Method method = clazz.getMethod(methodName, getParameterTypes(args));
        return method.invoke(object, args);
    }

    private static Class<?>[] getParameterTypes(Object... args) {
        Class<?>[] parameterTypes = new Class<?>[args.length];
        for (int i = 0; i < args.length; i++) {
            parameterTypes[i] = args[i].getClass();
        }
        return parameterTypes;
    }
}

示例：

public class MyClass {
    public void sayHello(String name) {
        System.out.println("Hello, " + name);
    }
}

public class Main {
    public static void main(String[] args) throws Exception {
        MyClass myClass = new MyClass();
        Utils.invokeMethod(myClass, "sayHello", "John");
    }
}

输出结果为："Hello, John"

2. 实现给指定对象任意属性的赋值操作：

import java.lang.reflect.Field;

public class Utils {
    public static void setField(Object object, String fieldName, Object value) throws Exception {
        Class<?> clazz = object.getClass();
        Field field = clazz.getDeclaredField(fieldName);
        field.setAccessible(true);
        field.set(object, value);
    }
}

示例：

public class MyClass {
    private String name;

    public void printName() {
        System.out.println("Name: " + name);
    }
}

public class Main {
    public static void main(String[] args) throws Exception {
        MyClass myClass = new MyClass();
        Utils.setField(myClass, "name", "John");
        myClass.printName();
    }
}

输出结果为："Name: John"