1、设计实现任意两个复数进行4则运算（复数加法、减法、乘法、除法）的Java Web程序。要求采用JavaBean+Jsp+Servlet的MVC设计模式实现。

好的，我会尽力回答你的问题。

首先，我们需要定义一个复数类 Complex，该类包含实部和虚部两个属性，以及复数加减乘除四种运算方法。

public class Complex {
    private double real;
    private double imaginary;

    public Complex(double real, double imaginary) {
        this.real = real;
        this.imaginary = imaginary;
    }

    public Complex add(Complex other) {
        double real = this.real + other.real;
        double imaginary = this.imaginary + other.imaginary;
        return new Complex(real, imaginary);
    }

    public Complex subtract(Complex other) {
        double real = this.real - other.real;
        double imaginary = this.imaginary - other.imaginary;
        return new Complex(real, imaginary);
    }

    public Complex multiply(Complex other) {
        double real = this.real * other.real - this.imaginary * other.imaginary;
        double imaginary = this.real * other.imaginary + this.imaginary * other.real;
        return new Complex(real, imaginary);
    }

    public Complex divide(Complex other) {
        double denominator = other.real * other.real + other.imaginary * other.imaginary;
        double real = (this.real * other.real + this.imaginary * other.imaginary) / denominator;
        double imaginary = (this.imaginary * other.real - this.real * other.imaginary) / denominator;
        return new Complex(real, imaginary);
    }

    public double getReal() {
        return real;
    }

    public double getImaginary() {
        return imaginary;
    }
}

然后，我们需要创建一个名为 ComplexCalculator 的 JavaBean，该类包含两个 Complex 属性和四个方法，分别实现复数加减乘除四种运算。

public class ComplexCalculator {
    private Complex operand1;
    private Complex operand2;

    public ComplexCalculator() {
        operand1 = new Complex(0, 0);
        operand2 = new Complex(0, 0);
    }

    public Complex getOperand1() {
        return operand1;
    }

    public void setOperand1(Complex operand1) {
        this.operand1 = operand1;
    }

    public Complex getOperand2() {
        return operand2;
    }

    public void setOperand2(Complex operand2) {
        this.operand2 = operand2;
    }

    public Complex add() {
        return operand1.add(operand2);
    }

    public Complex subtract() {
        return operand1.subtract(operand2);
    }

    public Complex multiply() {
        return operand1.multiply(operand2);
    }

    public Complex divide() {
        return operand1.divide(operand2);
    }
}

接下来，我们需要创建一个名为 ComplexCalculatorServlet 的 Servlet 类，该类实现了 doGet 方法和 doPost 方法，用于处理 HTTP GET 和 POST 请求。

@WebServlet("/complexcalculator")
public class ComplexCalculatorServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        ComplexCalculator calculator = new ComplexCalculator();
        request.setAttribute("calculator", calculator);
        request.getRequestDispatcher("/complexcalculator.jsp").forward(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        ComplexCalculator calculator = new ComplexCalculator();
        calculator.setOperand1(new Complex(Double.parseDouble(request.getParameter("real1")),
                Double.parseDouble(request.getParameter("imaginary1"))));
        calculator.setOperand2(new Complex(Double.parseDouble(request.getParameter("real2")),
                Double.parseDouble(request.getParameter("imaginary2"))));
        String operation = request.getParameter("operation");
        Complex result = null;
        switch (operation) {
            case "add":
                result = calculator.add();
                break;
            case "subtract":
                result = calculator.subtract();
                break;
            case "multiply":
                result = calculator.multiply();
                break;
            case "divide":
                result = calculator.divide();
                break;
        }
        request.setAttribute("calculator", calculator);
        request.setAttribute("result", result);
        request.getRequestDispatcher("/complexcalculator.jsp").forward(request, response);
    }
}

最后，我们需要创建一个名为 complexcalculator.jsp 的 JSP 页面，该页面包含一个表单，用于输入两个复数和选择运算符，以及一个用于显示结果的元素。

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Complex Calculator</title>
</head>
<body>
    <h1>Complex Calculator</h1>
    <form method="post" action="complexcalculator">
        <label>
            Operand 1:
            <input type="text" name="real1" value="${calculator.operand1.real}"/> +
            <input type="text" name="imaginary1" value="${calculator.operand1.imaginary}"/>i
        </label>
        <br/>
        <label>
            Operand 2:
            <input type="text" name="real2" value="${calculator.operand2.real}"/> +
            <input type="text" name="imaginary2" value="${calculator.operand2.imaginary}"/>i
        </label>
        <br/>
        <label>
            Operation:
            <select name="operation">
                <option value="add">+</option>
                <option value="subtract">-</option>
                <option value="multiply">*</option>
                <option value="divide">/</option>
            </select>
        </label>
        <br/>
        <input type="submit" value="Calculate"/>
    </form>
    <%
        Complex result = (Complex) request.getAttribute("result");
        if (result != null) {
    %>
    <p>Result: <%= result.getReal() %> + <%= result.getImaginary() %>i</p>
    <%
        }
    %>
</body>
</html>

以上就是实现任意两个复数进行4则运算的 Java Web 程序的全部代码，该程序采用了 JavaBean+Jsp+Servlet 的 MVC 设计模式实现，可以通过部署到 Tomcat 等 Web 服务器上进行访问和使用。