在com.sun.proxy上获取UndeclaredThrowableException。$Proxy10.Open尝试打开excel工作簿

import org.apache.poi.ss.usermodel.*;

import java.io.FileInputStream;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

public class ExcelProxyExample {
    public static void main(String[] args) {
        // 创建目标对象
        ExcelHandler excelHandler = new ExcelHandler();

        // 创建动态代理对象
        ExcelOperation excelProxy = (ExcelOperation) Proxy.newProxyInstance(
                ExcelProxyExample.class.getClassLoader(),
                new Class[]{ExcelOperation.class},
                new InvocationHandler() {
                    @Override
                    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                        try {
                            // 在代理对象中调用目标方法
                            return method.invoke(excelHandler, args);
                        } catch (Exception e) {
                            // 捕获异常并抛出UndeclaredThrowableException
                            throw new UndeclaredThrowableException(e);
                        }
                    }
                });

        // 调用代理对象的Open方法
        try {
            excelProxy.Open("path/to/excel.xlsx");
        } catch (UndeclaredThrowableException e) {
            // 处理UndeclaredThrowableException异常
            Throwable cause = e.getUndeclaredThrowable();
            if (cause instanceof Exception) {
                // 处理Excel打开异常
                System.out.println("Failed to open Excel workbook: " + cause.getMessage());
            } else {
                // 其他类型的异常处理
                e.printStackTrace();
            }
        }
    }
}

// 定义Excel操作接口
interface ExcelOperation {
    void Open(String filePath);
}

// 实现Excel操作接口的目标类
class ExcelHandler implements ExcelOperation {
    @Override
    public void Open(String filePath) throws Exception {
        FileInputStream fis = new FileInputStream(filePath);
        Workbook workbook = WorkbookFactory.create(fis);
        // 具体的Excel打开逻辑
        // ...
    }
}