JavaWeb:servlet+MyBatis+ajax (商品管理系统)
由于问题描述不具体,我将提供一个简化的JavaWeb项目结构和核心代码示例,包括Servlet处理请求、MyBatis操作数据库以及Ajax异步通信的基本概念。
- 项目结构示例:
- src
- main
- java
- controller
- ItemServlet.java
- dao
- ItemMapper.java
- model
- Item.java
- resources
- mybatis-config.xml
- mappers
- ItemMapper.xml
- webapp
- WEB-INF
- web.xml
- view
- itemList.jsp
- itemForm.jsp
- js
- item.js
- database.properties
- pom.xml
- Item.java (模型类)
public class Item {
private Integer id;
private String name;
private Double price;
// 省略getter和setter方法
}
- ItemMapper.java (MyBatis映射接口)
public interface ItemMapper {
List<Item> selectAllItems();
Item selectItemById(Integer id);
int insertItem(Item item);
int updateItem(Item item);
int deleteItem(Integer id);
}
- ItemServlet.java (处理请求的Servlet)
@WebServlet("/item")
public class ItemServlet extends HttpServlet {
private ItemMapper itemMapper;
@Override
public void init() {
// 初始化MyBatis环境
itemMapper = MyBatisUtil.getSqlSession().getMapper(ItemMapper.class);
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
List<Item> items = itemMapper.selectAllItems();
request.setAttribute("items", items);
request.getRequestDispatcher("/WEB-INF/view/itemList.jsp").forward(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String action = request.getParameter("action");
if ("add".equals(action)) {
// 添加商品逻辑
} else if ("edit".equals(action)) {
// 编辑商品逻辑
}
// 重定向或转发到商品列表页面
}
}
- itemList.jsp (商品列表页面)
<html>
<head>
<title>商品列表</title>
<script src="js/item.js"></script>
</head>
<body>
<h1>商品列表</h1>
<table>
<!-- 商品数据表格 -->
</table>
<button onclick="addItem()">添加商品</button>
</body>
</html>
- itemForm.jsp (商品表单页面)
<html>
<head>
<title>商品表单</title>
</head>
<body>
<form id="itemForm">
<!-- 商品表单 -->
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