+<%! + public double getArea(double a,int r){ + double area =a * r * r; + return area; + } +%> +<% + +%> + +
+ + \ No newline at end of file diff --git "a/work/com/java/minxi/java_20240603/java_2301_\351\231\210\344\277\212\346\235\260_2315340142/ladder.jsp" "b/work/com/java/minxi/java_20240603/java_2301_\351\231\210\344\277\212\346\235\260_2315340142/ladder.jsp" new file mode 100644 index 00000000..dc7836d4 --- /dev/null +++ "b/work/com/java/minxi/java_20240603/java_2301_\351\231\210\344\277\212\346\235\260_2315340142/ladder.jsp" @@ -0,0 +1,37 @@ +<%@ page import="static java.lang.System.out" %> +<%@ page contentType="text/html;charset=UTF-8" language="java" %> + + + ++ <%! + public String getArea(int up, int un, int he){ + if(up != un) { + int area = ((up + un) * he)/2; + return ("梯形的面积是:"+area); + }else { + return("上底"+up+"与下底"+un+"相等所以该图形不是梯形"); + } + } + %> +
+<% + String a = request.getParameter("upper"); + String b = request.getParameter("under"); + String c = request.getParameter("height"); + int upper = Integer.parseInt(a); + int under = Integer.parseInt(b); + int height = Integer.parseInt(c); +%> +
+
给我传递的值是:<%=a%>,<%=b%>,<%=c%>
+
梯形的面积是:<%=getArea(upper,under,height)%>
+
<%!
- public double getArea(double a,int r){
- double area =a * r * r;
+ public double getArea(int r){
+ double area =3.14 * r * r;
return area;
}
%>
<%
-
+ String a = request.getParameter("r");
+ int r = Integer.parseInt(a);
%>
+
给我传的值:<%=a%>
+圆的面积是:<%=getArea(r)%>
+<% + + Connection connection = null; + Statement statement = null; + ResultSet resultSet = null; + try { + Class.forName("com.java.cj.jdbc.Driver"); + String url = "mysql:jdbc://localhost:3306/student?serverTimezone=Asia/Shanghai"; + String username = "root"; + String password = "123456"; + connection = DriverManager.getConnection(url, username, password); + String sql = ("select id, user_name, user_phone from user_info;"); + statement = connection.createStatement(); + resultSet = statement.executeQuery(sql); + while(resultSet.next()){ + UserInfo userInfo = new UserInfo(resultSet.getInt("id"),resultSet.getNString("user_name"),resultSet.getNString("user_phone")); + list.add(userInfo); + } + for (UserInfo userInfo : list) { + out.print(userInfo); + } + } catch (Exception e) { + e.printStackTrace(); + }finally { + //释放资源 + try { + if (null != resultSet) { + resultSet.close(); + } + if (null != statement) { + statement.close(); + } + if (null != connection) { + connection.close(); + } + } catch (Exception e) { + e.printStackTrace(); + } + } +%> +
+ +