标签：通用 String Book req list public MVC 增删 book
思维导图：
一，导入jar包
步骤：1，鼠标单击选择包，右键选择
2，选择
3，点击之后选择jar包位置
4，导入自定义MVC框架所使用的相关jar包 
二，web.xml做配置
1.新建一个source folder文件夹
将framework下的config.xml复制到conf文件夹下（根文件夹）
2.在中央控制器中的、将@WebServlet（"*.action"）注释掉
3. 在web.xml中重新进行配置
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>MVC-crud</display-name>
<servlet>
<servlet-name>mvc</servlet-name>
<servlet-class>com.zking.framework.DispatchServlet</servlet-class>
<init-param>
<param-name>configurationLocation</param-name>
<param-value>/mvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>mvc</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>
</web-app>4,根目录下mvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<config>
<forward name="list" path="/bookList.jsp" redirect="false" />
<forward name="toList" path="/Book.action?methodName=list" redirect="true" /> Book.action?methodName=list
<forward name="toEdit" path="/bookEdit.jsp" redirect="false" />
</action>
</config>三，写代码
实体类：
bookdao:
public class BookDao extends BaseDao{
public void add(Book book) throws Exception {
String sql="insert into tb_book values(?,?,?)";
super.executeUpdate(sql, book,new String[]{"id","bname","price"});
}
public void del(Book book) throws Exception {
String sql="delete from tb_book where id= ?";
super.executeUpdate(sql, book,new String[]{"id"});
}
public void edit(Book book) throws Exception {
String sql="update tb_book set bname=?,price=? where id=?";
super.executeUpdate(sql, book,new String[]{"bname","price","id"});
}
public List<Book> list(Book book,PageBean pageBean) throws Exception {
String sql="select * from tb_book where 1=1";
String bname=book.getBname();
if(StringUtils.isNotBlank(bname)) {
sql+=" and bname like '%"+bname+"%'";
}
return super.executeQuery(sql, Book.class, pageBean);
}
}
bookaction:
package com.web;
/**
*子控制层
*/
/**
* 目标：1,利用自己做的自定义mvc框架完成增删改查
* 2,通用的分页查询&增删改
*
* 步骤：1，导入框架的jar包
* 2，做好框架的使用配置
* 3，一切照旧(JSP,servlet/BookAction子控制器,dao,entity)
* @author zjjt
*页面跳子控制器去处理，子控制器调dao层完成增删改查
*/
public class BookAction extends ActionSupport implements ModelDriver<Book>{
private Book book=new Book();
private BookDao bookDao=new BookDao();
@Override
public Book getModel() {
// TODO Auto-generated method stub
return book;
}
/**
* 增删改都要调回查询界面
* 分析增删改一共有多少结果集的配置
* 查询：BookList.jsp 返回值：list
* 增删改：book.action?mathodName=list 返回值：toList
* 增加修改跳转对应界面：bookEdit.jsp 返回值：toEdit
*
*
*/
public String add(HttpServletRequest req, HttpServletResponse resp) {
try {
bookDao.add(book);
} catch (Exception e) {
e.printStackTrace();
}
return "toList";
}
public String del(HttpServletRequest req, HttpServletResponse resp) {
try {
bookDao.del(book);
} catch (Exception e) {
e.printStackTrace();
}
return "toList";
}
public String edit(HttpServletRequest req, HttpServletResponse resp) {
try {
bookDao.edit(book);
} catch (Exception e) {
e.printStackTrace();
}
return "toList";
}
/**
* 跳转到新增修改页面
* @param req
* @param resp
* @return
*/
public String toEdit(HttpServletRequest req, HttpServletResponse resp) {
try {
/**
* 如果是跳转修改界面，那么需要做bid条件的精准查询
*
*
*/
if(book.getId()!=0) {
List<Book> list = bookDao.list(book, null);
req.setAttribute("b", list.get(0));
}
} catch (Exception e) {
e.printStackTrace();
}
return "toEdit";
}
public String list(HttpServletRequest req, HttpServletResponse resp) {
try {
PageBean pageBean = new PageBean();
pageBean.setRequest(req);
List<Book> list = bookDao.list(book,pageBean);
req.setAttribute("book", list);
req.setAttribute("pageBean", pageBean);
} catch (Exception e) {
e.printStackTrace();
}
return "list";
}
}
JSP：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link
href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.css"
rel="stylesheet">
<script
src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/js/bootstrap.js"></script>
<title>书籍列表</title>
<style type="text/css">
.page-item input {
padding: 0;
width: 40px;
height: 100%;
text-align: center;
margin: 0 6px;
}
.page-item input, .page-item b {
line-height: 38px;
float: left;
font-weight: 400;
}
.page-item.go-input {
margin: 0 10px;
}
</style>
</head>
<body>
<form class="form-inline"
action="${pageContext.request.contextPath }/Book.action?methodName=list" method="post">
<div class="form-group mb-2">
<input type="text" class="form-control-plaintext" name="bname"
placeholder="请输入书籍名称">
<!-- <input name="rows" value="20" type="hidden"> -->
<!-- 不想分页 -->
<input name="pagination" value="false" type="hidden">
</div>
<button type="submit" class="btn btn-primary mb-2">查询</button>
<a class="btn btn-primary mb-2" href="${pageContext.request.contextPath }/bookEdit.jsp">新增</a>
</form>
<table class="table table-striped bg-success">
<thead>
<tr>
<th scope="col">书籍ID</th>
<th scope="col">书籍名</th>
<th scope="col">价格</th>
<th scope="col">操作</th>
</tr>
</thead>
<tbody>
<c:forEach var="b" items="${book }">
<tr>
<td>${b.id }</td>
<td>${b.bname }</td>
<td>${b.price }</td>
<td>
<a href="${pageContext.request.contextPath }/Book.action?methodName=toEdit&id=${b.id}">修改</a>
<a href="${pageContext.request.contextPath }/Book.action?methodName=del&id=${b.id}">删除</a>
</td>
</tr>
</c:forEach>
</tbody>
</table>
<!-- 这一行代码就相当于前面分页需求前端的几十行了 -->
<z:page pageBean="${pageBean }"></z:page>
</body>
</html>展示：
标签：通用,String,Book,req,list,public,MVC,增删,book 来源： https://blog.csdn.net/xyy_0517/article/details/120608069
本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享； 2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关； 3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关； 4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除； 5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。