JSP与JavaBean实现两个复数的加减乘除
时间: 2024-03-27 22:36:06 浏览: 65
可以通过以下步骤使用JSP与JavaBean实现两个复数的加减乘除:
1. 创建一个复数类,例如Complex,该类应该包含实部和虚部属性以及相应的 getter 和 setter 方法。
```java
public class Complex {
private double real;
private double imag;
public Complex(double real, double imag) {
this.real = real;
this.imag = imag;
}
public double getReal() {
return real;
}
public void setReal(double real) {
this.real = real;
}
public double getImag() {
return imag;
}
public void setImag(double imag) {
this.imag = imag;
}
}
```
2. 创建一个JavaBean,例如ComplexBean,该Bean包含两个Complex对象,分别表示两个复数,以及四个方法,分别实现两个复数的加减乘除操作。
```java
public class ComplexBean {
private Complex c1;
private Complex c2;
public Complex getC1() {
return c1;
}
public void setC1(Complex c1) {
this.c1 = c1;
}
public Complex getC2() {
return c2;
}
public void setC2(Complex c2) {
this.c2 = c2;
}
public Complex add() {
double real = c1.getReal() + c2.getReal();
double imag = c1.getImag() + c2.getImag();
return new Complex(real, imag);
}
public Complex sub() {
double real = c1.getReal() - c2.getReal();
double imag = c1.getImag() - c2.getImag();
return new Complex(real, imag);
}
public Complex mul() {
double real = c1.getReal() * c2.getReal() - c1.getImag() * c2.getImag();
double imag = c1.getReal() * c2.getImag() + c1.getImag() * c2.getReal();
return new Complex(real, imag);
}
public Complex div() {
double denominator = c2.getReal() * c2.getReal() + c2.getImag() * c2.getImag();
double real = (c1.getReal() * c2.getReal() + c1.getImag() * c2.getImag()) / denominator;
double imag = (c1.getImag() * c2.getReal() - c1.getReal() * c2.getImag()) / denominator;
return new Complex(real, imag);
}
}
```
3. 创建一个JSP页面,例如complex.jsp,该页面包含一个表单,用户可以输入两个复数的实部和虚部,以及一个下拉框,用户可以选择进行加、减、乘、除操作。当用户提交表单时,JSP页面会调用相应的JavaBean方法,并将结果显示在页面上。
```html
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ page import="com.example.Complex, com.example.ComplexBean" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Complex Calculator</title>
</head>
<body>
<h1>Complex Calculator</h1>
<form action="complex.jsp" method="post">
<label for="real1">Real part of complex 1:</label>
<input type="text" name="real1" id="real1"><br>
<label for="imag1">Imaginary part of complex 1:</label>
<input type="text" name="imag1" id="imag1"><br>
<label for="real2">Real part of complex 2:</label>
<input type="text" name="real2" id="real2"><br>
<label for="imag2">Imaginary part of complex 2:</label>
<input type="text" name="imag2" id="imag2"><br>
<label for="operator">Operation:</label>
<select name="operator" id="operator">
<option value="add">Add</option>
<option value="sub">Subtract</option>
<option value="mul">Multiply</option>
<option value="div">Divide</option>
</select><br>
<input type="submit" value="Calculate">
</form>
<%-- Get the form data and perform the calculation --%>
<%
// Get the form data
double real1 = Double.parseDouble(request.getParameter("real1"));
double imag1 = Double.parseDouble(request.getParameter("imag1"));
double real2 = Double.parseDouble(request.getParameter("real2"));
double imag2 = Double.parseDouble(request.getParameter("imag2"));
String operator = request.getParameter("operator");
// Create the Complex objects
Complex c1 = new Complex(real1, imag1);
Complex c2 = new Complex(real2, imag2);
// Create the ComplexBean and set the Complex objects
ComplexBean bean = new ComplexBean();
bean.setC1(c1);
bean.setC2(c2);
// Perform the calculation and display the result
Complex result = null;
switch (operator) {
case "add":
result = bean.add();
break;
case "sub":
result = bean.sub();
break;
case "mul":
result = bean.mul();
break;
case "div":
result = bean.div();
break;
}
out.println("Result: " + result.getReal() + " + " + result.getImag() + "i");
%>
</body>
</html>
```
以上就是通过JSP与JavaBean实现两个复数的加减乘除的步骤。
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