应用Maven管理SringMvc+MyBaties登录功能的实现

一、dao模块

1.mysql 首先建个库，库下建个t_user表如下

2.新建个Maven项目，实现dao接口模块

3.先在pom.xml配置下所需jar包

进入mvnrepository.com，去寻找mybaties，mysql，log4j 的

相关依赖代码。

    <dependencies>
    <dependency> 
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.4.5</version>
  </dependency>
  
  <dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>6.0.6</version>
  </dependency>
  
  <dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.17</version>
  </dependency>

 4.新建个Source Folder文件夹 src/main/resources

把 log4j.properties和mybatis-config.xml 两个配置文件 放到 src/main/resources目录下

日志配置文件和mybatis的配置文件代码如下

log4j.rootLogger=DEBUG, Console  
  
#Console  
log4j.appender.Console=org.apache.log4j.ConsoleAppender  
log4j.appender.Console.layout=org.apache.log4j.PatternLayout  
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n  
  
log4j.logger.java.sql.ResultSet=INFO  
log4j.logger.org.apache=INFO  
log4j.logger.java.sql.Connection=DEBUG  
log4j.logger.java.sql.Statement=DEBUG  
log4j.logger.java.sql.PreparedStatement=DEBUG  

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <!-- 别名 -->
    <typeAliases>
        <package name="com.guo.user.entity"/>
    </typeAliases>
</configuration>

5.在src/main/java文件的com.guo.user.dao包下新建个UserDao接口，代码如下

package com.guo.user.dao;

import com.guo.user.entity.User;

public interface UserDao {
    
    public User login(User user);

}

6.在src/main/java文件的com.guo.user.entity包下新建个User实体，代码如下

package com.guo.user.entity;

public class User {
    private Integer id;
    private String userName;
    private String password;
    
    
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
}

7..在src/main/java文件的com.guo.user.mappers包下新建个UserMapper实体，代码如下

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.guo.user.dao.UserDao">

    <select id="login" parameterType="User" resultType="User">
        select * from t_user where userName=#{userName} and password=#{password}
    </select>
</mapper> 

二、service模块

1.要再新建个maven项目user-service

2.配置pom.xml，引入Spring的依赖代码如下

<dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-core</artifactId>
          <version>4.1.7.RELEASE</version>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-beans</artifactId>
          <version>4.1.7.RELEASE</version>
      </dependency>
      <dependency>
         <groupId>org.springframework</groupId>
         <artifactId>spring-tx</artifactId>
         <version>4.1.7.RELEASE</version>
        </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context</artifactId>
          <version>4.1.7.RELEASE</version>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context-support</artifactId>
          <version>4.1.7.RELEASE</version>
      </dependency>
  
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>4.1.7.RELEASE</version>
    </dependency>
      
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>4.1.7.RELEASE</version>
    </dependency>
    
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</artifactId>
        <version>4.1.7.RELEASE</version>
    </dependency>
    
    
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aspects</artifactId>
        <version>4.1.7.RELEASE</version>
    </dependency>

    
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>4.1.7.RELEASE</version>
    </dependency>

3.再加个Spring对mybaties的支持jar包

<dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
         <version>1.3.1</version>
    </dependency>

4.user-service项目下新建个src/main/resources文件夹用于存放Spring的配置文件applicationContext.xml代码如下

<?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:p="http://www.springframework.org/schema/p"  
    xmlns:aop="http://www.springframework.org/schema/aop"   
    xmlns:context="http://www.springframework.org/schema/context"  
    xmlns:jee="http://www.springframework.org/schema/jee"  
    xmlns:tx="http://www.springframework.org/schema/tx"  
    xsi:schemaLocation="    
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd  
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd  
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd  
        http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd  
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">    
        
    <!-- 自动扫描 -->
    <context:component-scan base-package="com.guo.user.service" />
    
    <!-- 配置数据源 -->
    <bean id="dataSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/db_maven"/>
        <property name="username" value="root"/>
        <property name="password" value="123456"/>
    </bean>

    <!-- 配置mybatis的sqlSessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <!-- 自动扫描mappers.xml文件 -->
        <property name="mapperLocations" value="classpath:com/guo/user/mappers/*.xml"></property>
        <!-- mybatis配置文件 -->
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
    </bean>

    <!-- DAO接口所在包名，Spring会自动查找其下的类 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.guo.user.dao" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
    </bean>

    <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>
    
    <!-- 配置事务通知属性 -->  
    <tx:advice id="txAdvice" transaction-manager="transactionManager">  
        <!-- 定义事务传播属性 -->  
        <tx:attributes>  
            <tx:method name="insert*" propagation="REQUIRED" />  
            <tx:method name="update*" propagation="REQUIRED" />  
            <tx:method name="edit*" propagation="REQUIRED" />  
            <tx:method name="save*" propagation="REQUIRED" />  
            <tx:method name="add*" propagation="REQUIRED" />  
            <tx:method name="new*" propagation="REQUIRED" />  
            <tx:method name="set*" propagation="REQUIRED" />  
            <tx:method name="remove*" propagation="REQUIRED" />  
            <tx:method name="delete*" propagation="REQUIRED" />  
            <tx:method name="change*" propagation="REQUIRED" />  
            <tx:method name="check*" propagation="REQUIRED" />  
            <tx:method name="get*" propagation="REQUIRED" read-only="true" />  
            <tx:method name="find*" propagation="REQUIRED" read-only="true" />  
            <tx:method name="load*" propagation="REQUIRED" read-only="true" />  
            <tx:method name="*" propagation="REQUIRED" read-only="true" />  
        </tx:attributes>  
    </tx:advice>  
  
    <!-- 配置事务切面 -->  
    <aop:config>  
        <aop:pointcut id="serviceOperation"  
            expression="execution(* com.java1234.user.service.*.*(..))" />  
        <aop:advisor advice-ref="txAdvice" pointcut-ref="serviceOperation" />  
    </aop:config>  
    
   
</beans>

5.在src/main/java 目录com.guo.user.service包下新建UserService接口代码如下

package com.guo.user.service;

import com.guo.user.entity.User;

public interface UserService {
    
    public User login(User user);
}

6.这是会发现没有User这个实体，所以我们需将user-dao项目run install打包到本地创库，然后在通过配置user-service的pom.xml的依赖将包从本地仓库引入进来，依赖代码如下

 <dependency>
      <groupId>com.guo.user</groupId>
      <artifactId>user-dao</artifactId>
      <version>0.0.1-SNAPSHOT</version>
      
    </dependency>

7.再建个service接口的实现类UserServiceImpl在com.guo.user.service.impl包下，代码如下

package com.guo.user.service.impl;

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

import com.guo.user.dao.UserDao;
import com.guo.user.entity.User;
import com.guo.user.service.UserService;
@Service("userService")
public class UserServiceImpl implements UserService {
    @Autowired
    private UserDao userDao;
    public User login(User user) {
        // TODO Auto-generated method stub
        return userDao.login(user);
    }
}

三、Maven构建web项目

1.新建个user-web项目， 选择mavenarchetype-webapp饭后next，

2.需人工改变一些文件结构，改完后如下图

4.配置pom.xml文件，首先需将之前的user-dao user-service两个项目打包配置进来(user-dao是通过配置user-service传递引入)，然后需添加Spring支持、servlet支持、jstl支持代码如下

 <!-- 添加本地service包 -->
   <dependency>
       <groupId>com.guo.user</groupId>
       <artifactId>user.service</artifactId>
       <version>0.0.1-SNAPSHOT</version>
   </dependency>
   <!-- 添加jtl的支持 -->
   <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
   </dependency>   
   
   <!-- 添加servlet支持 -->
   <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>4.0.0</version>
      <scope>provided</scope>
   </dependency>
   
   <dependency>
    <groupId>javax.servlet.jsp</groupId>
    <artifactId>javax.servlet.jsp-api</artifactId>
    <version>2.3.1</version>
    <scope>provided</scope>
</dependency>
  
    <!-- 添加对Spring的支持 -->
    <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-core</artifactId>
          <version>4.1.7.RELEASE</version>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-beans</artifactId>
          <version>4.1.7.RELEASE</version>
      </dependency>
      <dependency>
         <groupId>org.springframework</groupId>
         <artifactId>spring-tx</artifactId>
         <version>4.1.7.RELEASE</version>
        </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context</artifactId>
          <version>4.1.7.RELEASE</version>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context-support</artifactId>
          <version>4.1.7.RELEASE</version>
      </dependency>
      
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>4.1.7.RELEASE</version>
    </dependency>
    
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>4.1.7.RELEASE</version>
    </dependency>
  
    <!-- 本地自编的jar包 -->
      <dependency>
          <groupId>com.guo.user</groupId>
          <artifactId>user-service</artifactId>
          <version>0.0.1-SNAPSHOT</version>
      </dependency>

5.编写web.xml进行整合，代码如下

<?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_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>MyBatisPro05</display-name>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  
    <!-- Spring配置文件 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <!-- 编码过滤器 -->
    <filter>
        <filter-name>encodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <async-supported>true</async-supported>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!-- Spring监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
    <!-- 添加对springmvc的支持 -->
    <servlet>
        <servlet-name>springMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-mvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
        <async-supported>true</async-supported>
    </servlet>
    <servlet-mapping>
        <servlet-name>springMVC</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
</web-app>

6.将编写好的spring-mvc添加进src/main/resources文件夹下，代码如下

<?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:p="http://www.springframework.org/schema/p"  
    xmlns:aop="http://www.springframework.org/schema/aop"   
    xmlns:context="http://www.springframework.org/schema/context"  
    xmlns:jee="http://www.springframework.org/schema/jee"  
    xmlns:tx="http://www.springframework.org/schema/tx"  
    xsi:schemaLocation="    
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd  
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd  
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd  
        http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd  
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">    

    <!-- 使用注解的包，包括子集 -->
    <context:component-scan base-package="com.guo.user.controller" />

    <!-- 视图解析器 -->
    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/" />
        <property name="suffix" value=".jsp"></property>
    </bean>

</beans>  

7.Controllor层的实现，src/main/java的com.guo.user包下新建UserControllor.java

package com.guo.user.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.guo.user.entity.User;
import com.guo.user.service.UserService;

@Controller
@RequestMapping("/user")
public class UserController {
    @Autowired
    private UserService userService;
    @RequestMapping("/login")
    public String login(User user,HttpServletRequest request){
        User resultUser=userService.login(user);
        if(resultUser==null){
            request.setAttribute("user", user);
            request.setAttribute("erroeMsg", "用户名和密码错误");
            return "index";  
        }else{
            HttpSession session=request.getSession();
            session.setAttribute("currentUser",resultUser);
            return "redirect:/success.jsp";    
        }
    }
    
}

8.在src目录下的webapp下新建两个jsp文件：index.jsp和success.jsp 代码如下

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!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">
<title>Insert title here</title>
</head>
<body>
<form action="${pageContext.request.contextPath }/user/login.do" method="post">
    userName:<input type="text" name="userName" value="${user.userName }"/><br/>
    password:<input type="password" name="password" value="${user.password }"><br/>
    <input type="submit" value="login"/><font color="red">${errorMsg }</font>
</form>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!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">
<title>Insert title here</title>
</head>
<body>
欢迎：${currentUser.userName }
</body>
</html

四、结果

1.直接右键 user-web项目 run on service运行 

2.结果截图

index.jsp页面，将数据库中存的用户名和密码输入，点login登录

succcss.jsp

 

五、可能出现的bug

解决办法

只需在数据库连接配置文件的url 后加个serverTimezone=GMT 如下

<property name="url" value="jdbc:mysql://localhost:3306/db_maven?serverTimezone=GMT"/>