前端页面不显示数据，但是添加部门后，后台数据库的数据会更新，控制台也没有报错

十年_之后 2019-02-13

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9回答

提问者十年_之后 2019-02-19 19:32:24

package com.work.oa.controller;

import com.work.oa.biz.DepartmentBiz;
import com.work.oa.entity.Department;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.Iterator;
import java.util.Map;

/**
* @ClassName DepartmentController
* @Description TODO
* @Auther wangyang
* @Date 2019/2/13 20:17
* @Version 1.0
**/

@Controller("departmentController")
@RequestMapping("/department")
public class DepartmentController {

@Autowired
public DepartmentBiz departmentBiz;

@RequestMapping("/list")
public String list(Map<String,Object> map){
map.put("list",departmentBiz.getAll());
Iterator<Map.Entry<String,Object>> it=map.entrySet().iterator();
while(it.hasNext()){
Map.Entry<String,Object> entry=it.next();
System.out.println(entry.getValue());
}
return "department_list";
}

@RequestMapping("/to_add")
public String toAdd(Map<String,Object> map){
map.put("department",new Department());
return "department_add";
}

@RequestMapping("/add")
public String add(Department department){
departmentBiz.add(department);
return "redirect:list";
}
@RequestMapping(value = "/to_update",params = "sn")
public String toUpdate(String sn,Map<String,Object> map){
map.put("department",departmentBiz.get(sn));
return "department_update";
}

@RequestMapping("/update")
public String update(Department department){
departmentBiz.edit(department);
return "redirect:list";
}

@RequestMapping(value = "/remove",params = "sn")
public String remove(String sn,Map<String,Object> map){
departmentBiz.remove(sn);
return "redirect:list";
}
}

DepartmentController.java的代码

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chrismorgen 2019-02-19 17:29:15

不需要再添加basePath，感觉你的数据应该没有返回到department_list.jsp中，请问同学是在DepartmentController的代码中打印list集合的吗？如果不是，建议在下图list方法中打印一下list集合，看看是否有数据，或者将DepartmentController中的代码粘贴一下，方便我们为你进行调试，祝学习愉快~

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提问者十年_之后 #1

我把departmentcontroller的代码贴在回答上了，控制台可以打印出数据，应该是没有返回到department_list.jsp

2019-02-19 19:34:13
提问者十年_之后 #2

我找到错误了，因为没有引入c标签

2019-02-19 20:52:54

提问者十年_之后 2019-02-19 13:22:31

之前有两个jpg报错是因为我忘了在路径前加/，加了之后F12就没有问题，但是前端数据仍然显示不出来，还是要用basepath吗

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chrismorgen 2019-02-18 19:03:09

你好同学，举个例子，在top.jsp中，可以在路径前加上basePath来表示。譬如下图写法，

<img src="<%=basePath%>/assets/img/avatars/5.jpg" alt="avatar" class="mw30 br64">

而basePath的代码可以按下图这种写法添加到页面顶端呢，如果还有问题同学可以继续提问哦，祝学习愉快~

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提问者十年_之后 #1

我把截图放在回答上了，还有关于basepath是只要把<% String path=request.getContextPath(); String basepath=request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %>写在页面顶端，然后在所有静态资源的路径前加上<%=basepath%>就可以了吗？

2019-02-19 13:25:15

提问者十年_之后 2019-02-18 14:12:37

<%--
Created by IntelliJ IDEA.
User: 12640
Date: 2019/2/13
Time: 20:26
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page isELIgnored="false" %>

<jsp:include page="top.jsp"/>

<section id="content" class="table-layout animated fadeIn">
<div class="tray tray-center">
<div class="content-header">
<h2> 部门列表 </h2>
<p class="lead"></p>
</div>
<div class="admin-form theme-primary mw1000 center-block" style="padding-bottom: 175px;">
<div class="panel heading-border">
<div class="panel-menu">
<div class="row">
<div class="hidden-xs hidden-sm col-md-3">
<div class="btn-group">
<button type="button" class="btn btn-default light">
<i class="fa fa-refresh"></i>
</button>
<button type="button" class="btn btn-default light">
<i class="fa fa-trash"></i>
</button>
<button type="button" class="btn btn-default light">
<i class="fa fa-plus" onclick="javascript:window.location.href='/department/to_add';"></i>
</button>
</div>
</div>
<div class="col-xs-12 col-md-9 text-right">
<div class="btn-group">
<button type="button" class="btn btn-default light">
<i class="fa fa-chevron-left"></i>
</button>
<button type="button" class="btn btn-default light">
<i class="fa fa-chevron-right"></i>
</button>
</div>
</div>
</div>
</div>
<div class="panel-body pn">
<table id="message-table" class="table admin-form theme-warning tc-checkbox-1">
<thead>
<tr class="">
<th class="text-center hidden-xs">Select</th>
<th class="hidden-xs">部门编号</th>
<th class="hidden-xs">部门名称</th>
<th class="hidden-xs">地址</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<c:forEach items="${list}" var="dept">
<tr class="message-unread">
<td class="hidden-xs">
<label class="option block mn">
<input type="checkbox" name="mobileos" value="FR">
<span class="checkbox mn"></span>
</label>
</td>
<td>${dept.sn}</td>
<td>${dept.name}</td>
<td>${dept.address}</td>
<td>
<a href="/department/to_update?sn=${dept.sn}">编辑</a>
<a href="/department/remove?sn=${dept.sn}">删除</a>
</td>
</tr>
</c:forEach>

</tbody>
</table>
</div>
</div>
</div>
</div>
</section>

<jsp:include page="bottom.jsp"/>

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chrismorgen 2019-02-18 11:17:32

建议同学点击下图标记的两个jsp页面，看一下是哪行代码出现了404问题，

如果是资源文件出现了问题，同学可以参考一下http://class.imooc.com/course/qadetail/92783这个问答，使用basePath来写访问路径，可以避免访问路径资源出现404的问题，祝学习愉快~

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提问者十年_之后 #1

这个是jpg文件，不是jsp页面啊

2019-02-18 13:42:16
提问者十年_之后 #2

麻烦说详细一点

2019-02-18 13:45:13
chrismorgen 回复提问者十年_之后 #3

建议你将出现404路径的当前jsp页面的代码粘贴上来，我给你标记一下，祝学习愉快~

2019-02-18 13:47:53

点开查看后面1条评论

提问者十年_之后 2019-02-17 20:46:10

浏览器的报错，百度了一下好像是没有加载静态资源，可是我明明按照视频设置了啊

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提问者十年_之后 2019-02-15 22:08:47

我在控制台可以成功输出department的数据，数据库也可以更新数据，但是前端还是显示不出来，我感觉应该是jsp的问题，但是不知道哪里出错了。下面是department_list.jsp的代码。

<%--
  Created by IntelliJ IDEA.
  User: 12640
  Date: 2019/2/13
  Time: 20:26
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page isELIgnored="false" %>

<jsp:include page="top.jsp"/>


<section id="content" class="table-layout animated fadeIn">
    <div class="tray tray-center">
        <div class="content-header">
            <h2> 部门列表 </h2>
            <p class="lead"></p>
        </div>
        <div class="admin-form theme-primary mw1000 center-block" style="padding-bottom: 175px;">
            <div class="panel  heading-border">
                <div class="panel-menu">
                    <div class="row">
                        <div class="hidden-xs hidden-sm col-md-3">
                            <div class="btn-group">
                                <button type="button" class="btn btn-default light">
                                    <i class="fa fa-refresh"></i>
                                </button>
                                <button type="button" class="btn btn-default light">
                                    <i class="fa fa-trash"></i>
                                </button>
                                <button type="button" class="btn btn-default light">
                                    <i class="fa fa-plus" onclick="javascript:window.location.href='/department/to_add';"></i>
                                </button>
                            </div>
                        </div>
                        <div class="col-xs-12 col-md-9 text-right">
                            <div class="btn-group">
                                <button type="button" class="btn btn-default light">
                                    <i class="fa fa-chevron-left"></i>
                                </button>
                                <button type="button" class="btn btn-default light">
                                    <i class="fa fa-chevron-right"></i>
                                </button>
                            </div>
                        </div>
                    </div>
                </div>
                <div class="panel-body pn">
                    <table id="message-table" class="table admin-form theme-warning tc-checkbox-1">
                        <thead>
                        <tr class="">
                            <th class="text-center hidden-xs">Select</th>
                            <th class="hidden-xs">部门编号</th>
                            <th class="hidden-xs">部门名称</th>
                            <th class="hidden-xs">地址</th>
                            <th>操作</th>
                        </tr>
                        </thead>
                        <tbody>
                        <c:forEach items="${list}" var="dept">
                        <tr class="message-unread">
                            <td class="hidden-xs">
                                <label class="option block mn">
                                    <input type="checkbox" name="mobileos" value="FR">
                                    <span class="checkbox mn"></span>
                                </label>
                            </td>
                            <td>${currentTime}</td>
                            <td>${dept.name}</td>
                            <td>${dept.address}</td>
                            <td>
                                <a href="/department/to_update?sn=${dept.sn}">编辑</a>
                                <a href="/department/remove?sn=${dept.sn}">删除</a>
                            </td>
                        </tr>
                        </c:forEach>

                        </tbody>
                    </table>
                </div>
            </div>
        </div>
    </div>
</section>


<jsp:include page="bottom.jsp"/>

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chrismorgen #1

你好同学，根据你粘贴的内容，可以判断出java代码与数据库连接是正确的，问题可能出在前端页面上，建议你在浏览器中按F12，看一下浏览器控制台中是否有报错提示呢？祝学习愉快~

2019-02-17 11:17:19
提问者十年_之后回复 chrismorgen #2

你好，我按F12发现报错提示，发在回答里了，请看一下

2019-02-17 20:47:43