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javaee–学生成绩录入与显示–Struts2标签的使用

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11月 28, 2021

类Score.java:各课程的成绩及平均成绩

类Student.java:学生姓名、学号及Score类

类ScoreAction.java:将Student类存在一个List对象中, execute()方法根据用户输入的成绩计算每个学生的平均成绩。

页面scores.jsp:完成录入学生信息及考试成绩

页面showScores.jsp:显示已录入的学生成绩及平均成绩

效果如下:

代码如下:

 1 package javaBean;
 2 
 3 public class Score {
 4     private int javaScore;
 5     private int j2eeScore;
 6     private int ccScore;
 7     private double aveScore;
 8     public int getJavaScore() {
 9         return javaScore;
10     }
11     public void setJavaScore(int javaScore) {
12         this.javaScore = javaScore;
13     }
14     public int getJ2eeScore() {
15         return j2eeScore;
16     }
17     public void setJ2eeScore(int j2eeScore) {
18         this.j2eeScore = j2eeScore;
19     }
20     public int getCcScore() {
21         return ccScore;
22     }
23     public void setCcScore(int ccScore) {
24         this.ccScore = ccScore;
25     }
26     public double getAveScore() {
27         return aveScore;
28     }
29     public void setAveScore(double aveScore) {
30         this.aveScore = aveScore;
31     }
32 }

Score

 1 package javaBean;
 2 
 3 
 4 public class Student {
 5     private String name;
 6     private long number;
 7     private Score score;
 8     public String getName() {
 9         return name;
10     }
11     public void setName(String name) {
12         this.name = name;
13     }
14     public long getNumber() {
15         return number;
16     }
17     public void setNumber(long number) {
18         this.number = number;
19     }
20     public Score getScore() {
21         return score;
22     }
23     public void setScore(Score score) {
24         this.score = score;
25     }
26 }

Student

 1 package actions;
 2 
 3 import java.math.BigDecimal;
 4 import java.util.List;
 5 
 6 import com.opensymphony.xwork2.ActionSupport;
 7 
 8 import javaBean.Score;
 9 import javaBean.Student;
10 
11 public class ScoreAction extends ActionSupport{
12     private static final long serialVersionUID = 1L;
13     private List<Student> students;
14 
15     public List<Student> getStudents() {
16         return students;
17     }
18 
19     public void setStudents(List<Student> students) {
20         this.students = students;
21     }
22     public String execute() throws Exception{
23         int size = students.size();
24         for(int i=0; i<size; i++){
25             Student st = students.get(i);
26             Score score = st.getScore();
27             double aveScore = (score.getJavaScore() + score.getCcScore() +
28                     score.getJ2eeScore()) / 3.0;
29             BigDecimal b = new BigDecimal(aveScore);
30             aveScore = b.setScale(1, BigDecimal.ROUND_HALF_UP).doubleValue();
31             score.setAveScore(aveScore);
32         }
33         return super.SUCCESS;
34     }
35 }

ScoreAction

 1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 2 <%@ taglib prefix="s" uri="/struts-tags"%>
 3 <%
 4     String path = request.getContextPath();
 5     String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
 6             + path + "/";
 7 %>
 8 
 9 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
10 <html>
11 <head>
12 <base href="<%=basePath%>">
13 
14 <title>输入学生成绩</title>
15 
16 <s:head theme="xhtml" />
17 <style type="text/css">
18 table {
19     border-collapse: collapse;
20     border: 1px solid #000;
21 }
22 
23 th, td {
24     border: 1px solid #000;
25 }
26 </style>
27 </head>
28 <body>
29     <s:form theme="simple" action="showscores" namespace="/"   >
30         <table>
31             <thead>
32                 <tr>
33                     <th align="center">姓名</th>
34                     <th align="center">学号</th>
35                     <th align="center">Java成绩</th>
36                     <th align="center">C语言成绩</th>
37                     <th align="center">J2EE成绩</th>
38                 </tr>
39             </thead>
40             <tbody>
41                 <s:iterator value="new int[4]" status="st">
42                     <tr>
43                         <td><s:textfield name="%{'students['+#st.index+'].name'}"></s:textfield>
44                         </td>
45                         <td><s:textfield name="%{'students['+#st.index+'].number'}"></s:textfield>
46                         </td>
47                         <td><s:textfield
48                                 name="%{'students['+#st.index+'].score.javaScore'}"></s:textfield>
49                         </td>
50                         <td><s:textfield
51                                 name="%{'students['+#st.index+'].score.ccScore'}"></s:textfield></td>
52                         <td><s:textfield
53                                 name="%{'students['+#st.index+'].score.j2eeScore'}"></s:textfield>
54                         </td>
55                     </tr>
56                 </s:iterator>
57             </tbody>
58         </table>
59         <s:submit value="提交"></s:submit>
60     </s:form>
61 </body>
62 </html>

scores.jsp

 1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 2 <%@ taglib prefix="s" uri="/struts-tags"%>
 3 <%
 4     String path = request.getContextPath();
 5     String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
 6             + path + "/";
 7 %>
 8 
 9 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
10 <html>
11 <head>
12 <base href="<%=basePath%>">
13 
14 <title>显示学生信息</title>
15 <s:head theme="xhtml" />
16 <style type="text/css">
17 table {
18     border-collapse: collapse;
19     border: 1px solid #000;
20 }
21 
22 th, td {
23     border: 1px solid #000;
24 }
25 </style>
26 </head>
27 
28 <body>
29     <table>
30         <thead>
31             <tr>
32                 <th align="center">姓名</th>
33                 <th align="center">学号</th>
34                 <th align="center">Java成绩</th>
35                 <th align="center">C语言成绩</th>
36                 <th align="center">J2EE成绩</th>
37                 <th align="center">平均成绩</th>
38             </tr>
39         </thead>
40         <tbody>
41             <s:iterator value="students" status="st">
42                 <tr>
43                     <td align="center"><s:property value="name" /></td>
44                     <td align="center"><s:property value="number" /></td>
45                     <td align="center"><s:property value="score.javaScore" /></td>
46                     <td align="center"><s:property value="score.ccScore" /></td>
47                     <td align="center"><s:property value="score.j2eeScore" /></td>
48                     <td align="center"><s:property value="score.aveScore" /></td>
49                 </tr>
50             </s:iterator>
51 
52         </tbody>
53     </table>
54 </body>
55 </html>

showScores.jsp

1 <action name="scores">
2             <result>/scores.jsp</result>
3 </action>
4 <action name="showscores" class="actions.ScoreAction">
5             <result name="success">/showScores.jsp</result>
6 </action>

struts.xml

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