SSM框架集成.下（供自己练习查阅用）

spring和springMVC集成

在web.xml配置前端springMVC前端控制器（总控）

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
    
    <!-- 配置字符编码过滤器 -->
    <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    
    
    <!-- 配置前端控制器 -->
    <servlet>
        <servlet-name>MVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
<param-name>contextConfigLocation</param-name>
            
            <!-- 读取配置文件 
                问题：有多个spring相关配置文件如何读取
                如 ：spring.xml 和springmvc.xml
                
                解决方案：
                    方案一：直接使用 统配 * 可以读取多个有相同前缀的文件
                    <param-value>classpath:spring*.xml</param-value>
                    方案二：先读取一个配置文件 如果 spring.xml
                    再在spring.xml文件中使用<import>标签导入 springmvc.xml文件
                    <import resource="classpath:springmvc.xml"/>
             -->
            
            <param-value>classpath:spring.xml</param-value>
        </init-param>
        
        <load-on-startup>1</load-on-startup>
        
    </servlet>
    <servlet-mapping>
        <servlet-name>MVC</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>

</web-app>

springMVC.xml配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        ">
        <!-- 配置springmvc的注解驱动 -->
<mvc:annotation-driven/>
        
</beans>

编写表现层代码（controller）

@Controller
@RequestMapping("/user")
public class UserController {
    
    @Autowired
    private UserService service;
    
    @RequestMapping("/list")
    public String list(Model m) {
        
        //调用service查询所有用户方法
        List<User> users = service.selectList();
        
        //共享数据
        m.addAttribute("users", users);
        
        return "/WEB-INF/view/user_list.jsp";
    }
    
    
    @RequestMapping("/delete")
    public String delete(Integer id) {
System.out.println(id);
        
        //调用service层的删除方法
        service.delteByPrimaryKey(id);
        
        return "redirect:/user/list.do";
    }
    
}

user_list.jsp页面代码

在jsp页面使用jstl标签库需要先在页面引入jstl 标签库

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!-- 引入jstl标签库  -->
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
    <h3>用户列表</h3>

    <table border="1" style=" 500px;" cellspacing="0">
        <tr>
            <th>id</th>
            <th>名称</th>
            <th>密码</th>
            <th>年龄</th>
            <th>操作</th>
        </tr>


        <c:forEach items="${users}" var="user">
            <tr>
                <td>${user.id}</td>
                <td>${user.name}</td>
                <td>${user.password}</td>
                <td>${user.age}</td>
                <td>
                    <a href="javascript:void(0);" onclick="deleteByPrimaryKey(${user.id})">删除</a> &nbsp;&nbsp;
                    <a href="">修改</a>
                </td>
            </tr>
        </c:forEach>
    </table>
    
<script type="text/javascript">
    
    function deleteByPrimaryKey(userId){
        
        if(confirm("亲，您确定删除此条数据么？")){
            window.location.href= "${pageContext.request.contextPath}/user/delete.do?id="+userId;
        }
    }

</script>

</body>
</html>