ssm實現登錄功能及攔截器配置

關於Spring SpringMVC MyBatis的一個綜合案例

要用到的jar包

web.xml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">
	
	<!-- The front controller of this Spring Web application, responsible for handling all application requests -->
	
	
	<!-- 設置請求參數字符編碼過濾 -->
	<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>

	
	
	
	<servlet>
		<servlet-name>springDispatcherServlet</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:spring*.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>

	<!-- Map all requests to the DispatcherServlet for handling -->
	<servlet-mapping>
		<servlet-name>springDispatcherServlet</servlet-name>
		<url-pattern>*.do</url-pattern>
	</servlet-mapping>
	
</web-app>

db.properties文件

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis?characterEncoding=utf-8
jdbc.username=root
jdbc.password=root
jdbc.maxActive=20

log4j.properties文件

# Global logging configuration
log4j.rootLogger=ERROR, stdout
# MyBatis logging configuration...
# 配置日誌
# 規則 log4j.logger.映射接口的包=日誌級別
# 總共五個級別（error:錯誤,info：普通信息,debug：調試信息,warn：警告,trae/all：所有情況）
# 當前開發階段配置debug/ (all/trace),項目上線以後配置error
log4j.logger.com.ywq.ssm.mapper=TRACE
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

springdao.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">

	<!-- 配置包掃描 -->
	<context:component-scan base-package="com.ywq.ssm"/>
	
	<!-- 讀取數據庫配置文件 -->
	<context:property-placeholder location="classpath:db.properties"/>
	
	<!-- 配置連接池 -->
	
	<!-- 配置阿里巴巴連接池 -->
	<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
		init-method="init" destroy-method="close">
		<property name="driverClassName" value="${jdbc.driverClassName}"/>
		<property name="url" value="${jdbc.url}"/>
		<property name="username" value="${jdbc.username}"/>
		<property name="password" value="${jdbc.password}"/>
		<property name="maxActive" value="${jdbc.maxActive}"/>
	</bean>

	<!-- MyBatis集成 -->
	<!-- 1.配置MyBatis的工廠對象SqlSessionFacotry -->
	<bean id="sqlSessionFacoyry" class="org.mybatis.spring.SqlSessionFactoryBean">
		<!-- 配置數據源 -->
		<property name="dataSource" ref="dataSource"></property>
	</bean>
	
	<!-- 2.使用包掃描創建映射接口代理對象 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<!-- 配置映射接口的包 -->
		<property name="basePackage" value="com.ywq.ssm.mapper"/>	
	</bean>
	
	<!-- 事務配置 -->
	
	<!-- 1.配置事務管理器 -->
	<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource"/>
	</bean>
	
	<!-- 配置事務通知 -->
	<tx:advice id="txAdvice" transaction-manager="txManager">
		<tx:attributes>
			<!-- DQL 查詢方法 -->
			<tx:method name="select*" read-only="true"/>
			<!-- DML 增刪改 -->
			<tx:method name="*"/>
		</tx:attributes>
	</tx:advice>
	<!-- 3.使用aop將事務通知切入到Servicec層 -->
		<aop:config>
			<aop:advisor advice-ref="txAdvice" pointcut="execution(* com.ywq.ssm.service..*.*(..))"/>
		</aop:config>
	
</beans>

springmvc.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">


	<!-- 開啓SpringMVC註解驅動 -->
	<mvc:annotation-driven/>
	
	<!-- 配置視圖解析器 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/view/"></property>
		<property name="suffix" value=".jsp"></property>
	</bean>
	
	<!-- 配置攔截器 -->
	<mvc:interceptors>
		<!-- 配置具體攔截器 -->
		<mvc:interceptor>
			<!-- 配置要攔截的資源請求
				/* :攔截一級所有請求 /isnert.do /delte.do /update.do
				/** :攔截多級多請求 /user/insert.do  /user/delte.do
				攔截器只會攔截SpringMVC的【控制器方法】，不會攔截jsp，html等其他資源
			 -->
			<mvc:mapping path="/**"/>
			<!-- 配置需要放行的資源,多個要放行的請求資源逗號隔開 
				/user/login.do,/user/xxx.do,/user/abc.do
			-->
			<mvc:exclude-mapping path="/user/login.do"/>
			<!-- 配置攔截器對象 -->
			<bean class="com.ywq.ssm.interceptor.CheckLoginlnterceptor"/>
		</mvc:interceptor>
	</mvc:interceptors>
	
</beans>

登錄頁面

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>


<h3>登錄頁面</h3>
<span style="color: red;" >${msg}</span>
<form action="${pageContext.request.contextPath}/user/login.do" method="post">
	賬號：<input type="text" name="name"><br>
	密碼：<input type="password" name="password"><br>
	<button type="submit">登錄</button>
</form>

數據列表頁面

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <!-- 引入jstl核心標籤庫 -->
   <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<table border="1" style="width: 500px;border-collapse: collapse;">
  <tr>
    <th>id</th>
    <th>name</th>
    <th>password</th>
    <th>age</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>${user.age}</td>
  		<td>
  			<!-- 
  				javascript:void(0); 禁用超鏈接的跳轉
  			 -->
  			<a href="javascript:void(0);" onclick="deleteUser(${user.id})">刪除</a>&nbsp;&nbsp;<a href=""> 修改</a>
  		</td>
  	</tr>
  </c:forEach>
</table>

<script type="text/javascript">
	function deleteUser(userId){
		if(confirm("您確定要刪除此條數據嗎？")){
			location.href="${pageContext.request.contextPath}/user/delete.do?userId="+userId
			
		}
		
	}
</script>
   

pojoUser代碼

package com.ywq.ssm.pojo;

public class User {
	private Integer id ;
	private String name;
	private String password;
	private Integer age;
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public Integer getAge() {
		return age;
	}
	public void setAge(Integer age) {
		this.age = age;
	}
	public User(Integer id, String name, String password, Integer age) {
		super();
		this.id = id;
		this.name = name;
		this.password = password;
		this.age = age;
	}
	public User() {
		super();
	}
	@Override
	public String toString() {
		return "User [id=" + id + ", name=" + name + ", password=" + password + ", age=" + age + "]";
	}
	
	
}

UserMapper代碼

package com.ywq.ssm.mapper;

import java.util.List;

import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;

import com.ywq.ssm.pojo.User;

public interface UserMapper {
	
	@Insert("insert into user (name,password,age) values(#{name},#{password},#{age})")
	int insert(User user);
	
	@Select("select * from user where id = #{id}")
	User selectByPrimaryKey(Integer id);
	
	@Select("select * from user")
	List<User> selectList();
	
	@Delete("delete from user where id = #{id}")
	int deleteByPrimaryKey(Integer id);

	@Select("select * from user where name = #{name} and password = #{password} ")
	User selectNameAndPassword(@Param("name") String name, @Param("password")  String password);
	
}

UserService接口

package com.ywq.ssm.service;

import java.util.List;

import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;

import com.ywq.ssm.pojo.User;

public interface UserService {
	int insert(User user);
	
	User selectByPrimaryKey(Integer id);
	
	List<User> selectList();
	
	int deleteByPrimaryKey(Integer id);

	User selectNameAndPassword(String name, String password);
	
}

UserService實現類

package com.ywq.ssm.service.impl;

import java.util.List;

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

import com.ywq.ssm.mapper.UserMapper;
import com.ywq.ssm.pojo.User;
import com.ywq.ssm.service.UserService;

@Service
public class UserServiceImpl  implements UserService{
	
	
	/*
	 * 問題：UserMapper映射接口的代理對象如何創建？
	 * 
	 * 
	 * 一，使用Spring之前
	 * 1.讀取mybatis-config.mxl主配置文件，創建SqlSessionFactory工廠對象
	 * 
	 * 2.使用工廠對象創建SqlSession 會話對象
	 * 
	 * 3.使用SqlSession的getMapper方法創建映射接口代理對象
	 * 	UserMapper userMapper = sqlSession.getMapper(UserMapper.class);
	 * 
	 * 4.提交事務
	 * 
	 * 5.關閉SqlSession
	 * 所有步驟全部開發者自己編寫代碼完成
	 * 
	 * 二，和Spring集成，全部操作交給Spring管理
	 * 
	 * MyBatis框架已經和Spring集成好了，在MyBatis和Spring集成的橋樑包中
	 * 	mybatis-spring-1.3.1.jar,開發者只需要將創建代碼配置到Spring即可
	 * 
	 * 
	 * 1.Spring幫忙創建SqlSessionFactory對象
	 * MyBatis框架已經和Spring集成好了，而且編寫好了創建SqlSessionFacoty對象的代碼
	 * 橋樑包：org.mybatis.spring.SqlSessionFactoryBean
	 * 
	 * 
	 * 2.和Spring集成不用創建SqlSession對象，每次創建映射接口代理對象會自動底層先創建
	 * 		SqlSession，再創建映射接口的代理對象
	 * 
	 * 3，創建映射接口的代理對象
	 * 	3.1創建單個映射接口代理對象
	 * 	橋樑包：org.mybatis.spring.mapper.MapperFactoryBean<T>
	 * 
	 *	3.2使用包掃面創建包下面所有的映射接口代理對象（推薦）
	 * 	橋樑包：org.mybatis.spring.mapper.MapperScannerConfigurer
	 * */
	
	@Autowired
	private UserMapper UserMapper;
	
	@Override
	public int insert(User user) {
		
		return UserMapper.insert(user);
	}

	@Override
	public User selectByPrimaryKey(Integer id) {
		
		return UserMapper.selectByPrimaryKey(id);
	}

	public List<User> selectList() {
		// TODO Auto-generated method stub
		return UserMapper.selectList();
	}

	public int deleteByPrimaryKey(Integer id) {
		// TODO Auto-generated method stub
		return UserMapper.deleteByPrimaryKey(id);
	}

	@Override
	public User selectNameAndPassword(String name, String password) {
		return UserMapper.selectNameAndPassword( name, password);
	}

}

UserController代碼

package com.ywq.ssm.controller;

import java.util.List;

import javax.servlet.http.HttpSession;
import javax.websocket.Session;

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.ywq.ssm.pojo.User;
import com.ywq.ssm.service.UserService;

@Controller
@RequestMapping("/user")
public class UserController {

	@Autowired
	private UserService userService;
	
	@RequestMapping("/list")
	public String list(Model m) {
		
		List<User> users = userService.selectList();
		m.addAttribute("users", users);
		
		return "userList";
		
	}
	
	@RequestMapping("/delete")
	public String delet(Integer userId) {
		userService.deleteByPrimaryKey(userId);
		
		//重定向跳轉到列表頁面
		return "redirect:/user/list.do";
		
	}
	
	@RequestMapping("/login")
	public String login(String name,String password,Model m,HttpSession session) {
		
		User user = userService.selectNameAndPassword(name,password);
		
		if (user ==null) {
			m.addAttribute("msg", "親，賬號或密碼錯誤! 請重新登錄！");
			// 返回登錄頁
		return "forward:/login.jsp";
		}else {
			session.setAttribute("USER_IN_SESSION", user);
		}
		
		//重定向到用戶列表
		return "redirect:/user/list.do";
	}
	
	
}

CheckLoginlnterceptor代碼

package com.ywq.ssm.interceptor;

import java.util.Date;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import com.ywq.ssm.pojo.User;

public class CheckLoginlnterceptor implements HandlerInterceptor {

	
	/*
	 * 此方法再控制器的方法執行之前進行攔截，可以做登錄檢查，權限判斷等
	 * 
	 * return boolean 返回boolean類型
	 * 1. true 說明滿足條件，放行
	 * 2.false 說明不滿足條件，不放行。同時開始自己編寫調轉到登錄頁面，沒有權限訪問提示頁面等
	 * 
	 * */
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
			throws Exception {
		//從session獲取登錄儲存User對象
		User user = (User) request.getSession().getAttribute("USER_IN_SESSION");
		System.out.println("user:"+user);
		if (user == null) {
			//跳轉頁面
			response.sendRedirect(request.getContextPath()+"/login.jsp");
			return false;
		}
		
		return true;
	}
	
	
	/*
	 * 此方法是後續處理方法，再控制器方法執行完畢以後執行，可以記錄操作日誌等
	 * */
	public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
			ModelAndView modelAndView) throws Exception {
		
		User user = (User) request.getSession().getAttribute("USER_IN_SESSION");
		
		Date date = new Date();
		String currentTime = date.toLocaleString();
		System.out.println(user.getName()+"在"+currentTime+",做了"+handler+"操作");
	}

	/*
	 *此方法再視圖渲染完畢以後執行，可以釋放資源等操作 
	 * */
	public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
			throws Exception {
	}
}