初识 Spring(25)---(SpringMVC实战--构建学生管理系统（15））

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本文介绍了一个学生管理系统中成绩录入模块的实现过程，包括成绩编辑、删除及批量录入等功能，并提供了相应的JSP页面、控制器、服务层及DAO层的实现代码。

SpringMVC实战--构建学生管理系统（15）

首页部分成绩录入页面（编辑/删除/批量录入功能）制作

（源代码见仓库：https://gitee.com/jianghao233/course）

新建 scoreInManager.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath}/static/css/common.css"/>
		<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath}/static/css/admin-common.css"/>
		<script src="${pageContext.request.contextPath}/static/js/jquery.js" type="text/javascript" charset="utf-8"></script>
		
	</head>
	<body>
		<div id="class-title">
			学生成绩表
		</div>
		<form action="${pageContext.request.contextPath}/scorein/batModify" method="post">
			<table cellspacing="0">
				<tr>
					<th>班级</th>
					<th>学生学号</th>
					<th>学生名称</th>
					<th>学年</th>
					<th>学期</th>
					<th>课程</th>				
					<th>学分</th>
					<th>成绩</th>
					<th>操作</th>
				</tr>
				<c:forEach items="${list}" var="c" varStatus="s">
					<tr>
						<input type="hidden" name="selections[${s.index }].selid" value="${c.selid }"/>
						<td>${c.classname }</td>
						<td>${c.stunum }</td>
						<td>${c.stuname }</td>
						<td>${c.year }</td>
						<td>${c.term }</td>
						<td>${c.coursename }</td>
						<td>${c.score }</td>
						<td><input type="text" id="grade${s.index }" name="selections[${s.index }].grade" value="${c.grade }"/></td>
						<td>
							<a href="javascript:void(0)" onclick="modify('${c.selid}','${s.index }')">编辑</a>
							<a href="${pageContext.request.contextPath}/scorein/deleteScore?selid=${c.selid }">删除</a>
						</td>
					</tr>
				</c:forEach>
				
			</table>
			
			<input type="submit" value="批量录入"/>
		</form>
	</body>
</html>
<script type="text/javascript" src="${pageContext.request.contextPath }/static/js/jquery.js"></script>
<script type="text/javascript">
function modify(selid,index){
	var grade = $('#grade'+index).val();	
	var url = '${pageContext.request.contextPath}/scorein/modify?selid=' + selid + '&grade=' + grade;
	location.href = url;	
}

</script>

新建 ScoreInController.java

package com.neuedu.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import com.neuedu.po.Selection;
import com.neuedu.service.ScoreInService;
import com.neuedu.vo.ScoreInVO;

@Controller
@RequestMapping("/scorein")
public class ScoreInController {
	
	@Autowired
	private ScoreInService scoreInService;
	
	@RequestMapping({"/","/list"})
	public String list(Model model) {
	
		List<ScoreInVO> list = scoreInService.getList();
		model.addAttribute("list", list);
		
		return "admin/scoreInManager";
	}
	
	@RequestMapping("/batModify")
	public String batModify(ScoreInVO scoreInVO) {
		scoreInService.batModify(scoreInVO.getSelections());
		return "redirect:/scorein/";
		
	}
	
	@RequestMapping("/modify")
	public String modify(Selection selection) {
		scoreInService.modify(selection);
		return "redirect:/scorein/";
	}
	
	@RequestMapping("/deleteScore")
	public String deleteScore(Integer selid) {
		scoreInService.deleteScore(selid);
		return "redirect:/scorein/";
	}
	
	
	
}

修改 index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath}/static/css/admin_index.css"/>
	</head>
	<body>
		<div id="header">
			
		</div> 
		<div id="left">
			<ul id="nav">
				<li><a href="${pageContext.request.contextPath}/class/list" target="content">班级管理</a></li>
				<li><a href="${pageContext.request.contextPath}/student/" target="content">学生管理</a></li>
				<li><a href="${pageContext.request.contextPath}/course/" target="content">课程管理</a></li>
				<li><a href="${pageContext.request.contextPath}/scorein/" target="content">成绩录入</a></li>    //修改代码
			</ul>
		</div>
		<div id="right">
			<iframe id="iframe" name="content" src="studentManager.jsp" width="100%" height="700px"></iframe>
		</div>
	</body>
</html>

新建 ScoreInVO.java

package com.neuedu.vo;

import java.util.List;

import com.neuedu.po.Selection;

public class ScoreInVO extends Selection{
	private String classname;
	private String stunum;
	private String stuname;
	private String coursename;
	private double score;
	
	List<Selection> selections;
	
	
	public List<Selection> getSelections() {
		return selections;
	}
	public void setSelections(List<Selection> selections) {
		this.selections = selections;
	}
	public String getClassname() {
		return classname;
	}
	public void setClassname(String classname) {
		this.classname = classname;
	}
	public String getStunum() {
		return stunum;
	}
	public void setStunum(String stunum) {
		this.stunum = stunum;
	}
	public String getStuname() {
		return stuname;
	}
	public void setStuname(String stuname) {
		this.stuname = stuname;
	}
	public String getCoursename() {
		return coursename;
	}
	public void setCoursename(String coursename) {
		this.coursename = coursename;
	}
	public double getScore() {
		return score;
	}
	public void setScore(double score) {
		this.score = score;
	}
	
}

新建 ScoreInMapper.java

package com.neuedu.mapper;

import java.util.List;

import org.apache.ibatis.annotations.Param;

import com.neuedu.vo.ScoreInVO;

public interface ScoreInMapper {
	
	public List<ScoreInVO> getList();
	public void deleteScore(@Param("selid")Integer selid);

}

新建 ScoreInMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.neuedu.mapper.ScoreInMapper">
	<select id="getList" resultType="com.neuedu.vo.ScoreInVO">
		select 
			sn.selid,
			c.classname,
			s.stunum,
			s.stuname,
			sn.`year`,
			sn.term,
			course.coursename,
			course.score,
		sn.grade
		from selection sn
		LEFT JOIN tb_student s  on s.stuid = sn.stuid
		LEFT JOIN tb_class c on s.classid = c.classid
		LEFT JOIN tb_course course on course.courseid = sn.courseid
		order by sn.`year`,sn.term,c.classid
	
	</select>
	
	<update id="deleteScore">
		update selection set grade = null where selid = #{selid}
	</update>
	
</mapper>

新建 ScoreInService.java

package com.neuedu.service;

import java.util.List;

import com.neuedu.po.Selection;
import com.neuedu.vo.ScoreInVO;

public interface ScoreInService {
	public List<ScoreInVO> getList();
	
	public void batModify(List<Selection> selections);
	
	public void modify(Selection selection);
	
	public void deleteScore(Integer selid);
	
}

新建 ScoreInServiceImpl.java

package com.neuedu.service.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.neuedu.mapper.ScoreInMapper;
import com.neuedu.mapper.SelectionMapper;
import com.neuedu.po.Selection;
import com.neuedu.service.ScoreInService;
import com.neuedu.vo.ScoreInVO;

@Service
public class ScoreInServiceImpl implements ScoreInService {
	
	@Autowired
	private ScoreInMapper scoreMapper;
	@Autowired
	private SelectionMapper selMapper;

	@Override
	public List<ScoreInVO> getList() {		
		return scoreMapper.getList();
	}

	@Override
	public void batModify(List<Selection> selections) {
		for (Selection s : selections) {
			selMapper.updateByPrimaryKeySelective(s);
		}		
	}

	@Override
	public void modify(Selection selection) {
		selMapper.updateByPrimaryKeySelective(selection);		
	}

	@Override
	public void deleteScore(Integer selid) {
		scoreMapper.deleteScore(selid);
	}
	
	

}

输出：进入成绩录入页面---输入成绩--点击编辑---点击删除