[ch05] 5.3, Implemented Hello, Calculator JSP file.

Signed-off-by: Dongho Sim <dhsim86@gmail.com>
dhsim86 · Mar 11, 2017 · e4aff02 · e4aff02
1 parent 19bc501
commit e4aff02
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diff --git a/src/main/webapp/Lesson05/Calculator.jsp b/src/main/webapp/Lesson05/Calculator.jsp
@@ -0,0 +1,79 @@
+<%--
+  Created by IntelliJ IDEA.
+  User: Dongho
+  Date: 2017. 3. 11.
+  Time: PM 2:41
+  To change this template use File | Settings | File Templates.
+--%>
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<%
+    String v1 = "";
+    String v2 = "";
+    String result = "";
+    String[] selected = {"", "", "", ""};
+
+    if (request.getParameter("v1") != null) {
+        v1 = request.getParameter("v1");
+        v2 = request.getParameter("v2");
+
+        String op = request.getParameter("op");
+
+        result = calculate(Integer.parseInt(v1),
+                Integer.parseInt(v2),
+                op);
+
+        if ("+".equals(op)) {
+            selected[0] = "selected";
+        }
+        else if ("-".equals(op)) {
+            selected[1] = "selected";
+        }
+        else if ("*".equals(op)) {
+            selected[2] = "selected";
+        }
+        else if ("/".equals(op)) {
+            selected[3] = "selected";
+        }
+    }
+%>
+<html>
+<head>
+    <title>Calculator</title>
+</head>
+<body>
+    <h2>JSP Calculator</h2>
+
+    <form action="Calculator.jsp" method="get">
+        <input text="text" name="v1" size="4" value="<%=v1%>">
+        <select name="op">
+            <option value="+" <%=selected[0]%>> + </option>
+            <option value="-" <%=selected[1]%>> - </option>
+            <option value="*" <%=selected[2]%>> * </option>
+            <option value="/" <%=selected[3]%>> / </option>
+        </select>
+        <input type="text" name="v2" size="4" value="<%=v2%>">
+        <input type="submit" value="=">
+        <input type="text" size="8" value="<%=result%>"><br>
+    </form>
+</body>
+</html>
+<%!
+    private String calculate(int a, int b, String op) {
+        int r = 0;
+
+        if ("+".equals(op)) {
+            r = a + b;
+        }
+        else if ("-".equals(op)) {
+            r = a - b;
+        }
+        else if ("*".equals(op)) {
+            r = a * b;
+        }
+        else if ("/".equals(op)) {
+            r = a / b;
+        }
+
+        return Integer.toString(r);
+    }
+%>
diff --git a/src/main/webapp/Lesson05/Hello.jsp b/src/main/webapp/Lesson05/Hello.jsp
@@ -0,0 +1,16 @@
+<%--
+  Created by IntelliJ IDEA.
+  User: Dongho
+  Date: 2017. 3. 11.
+  Time: PM 2:03
+  To change this template use File | Settings | File Templates.
+--%>
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+<head>
+    <title>Hello</title>
+</head>
+<body>
+    <p>Hello World!</p>
+</body>
+</html>