BMI算出肥満度チェックアプリ
▪️HealthCheck.java
package servlet;
import javax.servlet.RequestDispatcher;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import model.HealthBean;
import model.HealthCheckLogic;
@WebServlet("/HealthCheck")
public class HealthCheck extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// フォワード
RequestDispatcher dispatcher = request.getRequestDispatcher("/healthCheck.jsp");
dispatcher.forward(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// リクエストパラメータを取得
String weight = request.getParameter("weight"); // 身長
String height = request.getParameter("height"); // 体重
// 入力値をプロパティに設定
HealthBean health = new HealthBean();
health.setHeight(Double.parseDouble(height));
health.setWeight(Double.parseDouble(weight));
// 健康診断を実行し結果を設定
HealthCheckLogic healthCheckLogic = new HealthCheckLogic();
healthCheckLogic.execute(health);
// リクエストスコープに保存
request.setAttribute("health", health);
// フォワード
RequestDispatcher dispatcher = request.getRequestDispatcher("/healthCheckResult.jsp");
dispatcher.forward(request, response);
}
}
▪️HealthBean.java
package model;
import java.io.Serializable;
public class HealthBean implements Serializable {
private double height, weight, bmi;
private String bodyType;
public double getHeight() {
return height;
}
public void setHeight(double height) {
this.height = height;
}
public double getWeight() {
return weight;
}
public void setWeight(double weight) {
this.weight = weight;
}
public double getBmi() {
return bmi;
}
public void setBmi(double bmi) {
this.bmi = bmi;
}
public String getBodyType() {
return bodyType;
}
public void setBodyType(String bodyType) {
this.bodyType = bodyType;
}
}
▪️HealthCheckLogic.java
package model;
public class HealthCheckLogic {
public void execute(HealthBean health) {
// BMIを算出して設定
double weight = health.getWeight();
double height = health.getHeight();
double bmi = weight / (height / 100.0 * height / 100.0);
health.setBmi(bmi);
// BMI指数から体型を判定して設定
String bodyType;
if (bmi < 18.5) {
bodyType = "痩せ型";
} else if (bmi < 25) {
bodyType = "普通";
} else {
bodyType = "肥満";
}
health.setBodyType(bodyType);
}
}
▪️healthCheck.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>スッキリ健康診断</title>
</head>
<body>
<h1>スッキリ健康診断</h1>
<form action="/Test18/HealthCheck" method="post">
身長:<input type="text" name="height">(cm)<br> 体重:<input
type="text" name="weight">(kg)<br> <input type="submit"
value="診断">
</form>
</body>
</html>
▪️healthCheckResult.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="model.HealthBean"%>
<%
//リクエストスコープに保存されたHealthBeanインスタンスを取得
HealthBean health = (HealthBean) request.getAttribute("health");
%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>スッキリ健康診断</title>
</head>
<body>
<h1>スッキリ健康診断の結果</h1>
<p>
身長:<%=health.getHeight()%><br> 体重:<%=health.getWeight()%><br>
BMI:<%=health.getBmi()%><br> 体重:<%=health.getBodyType()%>
</p>
<a href="/Test18/HealthCheck">戻る</a>
</body>
</html>
▪️HealthCheck.java 実行結果
▪️Test18 Dynamic Web Application ファイル構成図
