Spring + mybatis 的maven项目登录示例

项目文件结构

pom.xml 设置项目相关依赖和打包选项

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.zaixs</groupId>
    <artifactId>spring</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <name>spring</name>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <spring.version>4.3.16.RELEASE</spring.version>
        <aspectj.version>1.9.0</aspectj.version>

        <mysql.version>5.1.46</mysql.version>
        <dbcp.version>1.4</dbcp.version>
        <mybatis.version>3.4.6</mybatis.version>
        <mybatis.spring.version>1.3.2</mybatis.spring.version>

        <junit.version>4.12</junit.version>
        <testng.version>6.14.3</testng.version>
    </properties>

    <dependencies>

        <!--spring-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>${aspectj.version}</version>
        </dependency>

        <!--datasource-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>${dbcp.version}</version>
        </dependency>

        <!--mybatis-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>${mybatis.spring.version}</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>3.0-alpha-1</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <!--test-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.testng</groupId>
            <artifactId>testng</artifactId>
            <version>${testng.version}</version>
            <scope>test</scope>
        </dependency>

    </dependencies>

    <build>
        <finalName>spring</finalName>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>*.xml</include>
                    <include>*.properties</include>
                </includes>
            </resource>
        </resources>
    </build>
</project>

User 实体类

package com.zaixs.model;

import java.io.Serializable;

public class User implements Serializable {

    private Integer id;

    private String username;

    private String password;

    private String createTime;

    private String updateTime;

    private Integer status;

    // settet getter 省略
}

DAO 接口及对应数据库语句的 xml 文件

package com.zaixs.dao;

import com.zaixs.model.User;

public interface UserDao {

    User get(User user);

}

UserDao.xml

<?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.zaixs.dao.UserDao">

    <select id="get" parameterType="com.zaixs.model.User" resultType="com.zaixs.model.User">
        SELECT
        id,
        username,
        password,
        create_time as createTime,
        update_time as updateTime,
        status
        FROM user
        WHERE
        status = 1
        <if test="id != null and id != 0">
            and id = #{id}
        </if>
        <if test="username != null and username != ''">
            and username = #{username}
        </if>
        <if test="password != null and password != ''">
            and password = #{password}
        </if>
    </select>

</mapper>

UserService.java

package com.zaixs.service;

import com.zaixs.dao.UserDao;
import com.zaixs.model.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserService {

    @Autowired
    private UserDao userDao;

    public User get(User user) {
        return userDao.get(user);
    }
}

配置数据库连接属性文件 jdbc.properties

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/test
jdbc.username=root
jdbc.password=1234

mybatis 配置文件 mybatis-config.xml

<?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>
    <settings>
        <!-- 打印查询语句输出到控制台 -->
        <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>
</configuration>

spring 的 application-context.xml 配置文件

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

    <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:jdbc.properties</value>
            </list>
        </property>
    </bean>
    
    <!--扫描类包，将标注Spring注解的类自动转化为Bean，同时完成Bean的注入-->
    <context:component-scan base-package="com.zaixs.service"/>

    <!--配置datasource-->
    <bean id="dataSource"
          class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="${jdbc.driverClassName}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>

    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>

    <!-- 自动扫描了所有的XxxxMapper.xml对应的mapper接口文件，这样就不用一个一个手动配置Mpper的映射了，只要Mapper接口类和Mapper映射文件对应起来就可以了。 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.zaixs.dao"/>
    </bean>

    <bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager" id="transactionManager"
          p:dataSource-ref="dataSource"/>

    <aop:config proxy-target-class="true">
        <aop:pointcut id="serviceMethod"
                      expression=" (execution(* com.zaixs.service..*(..))) and
        (@annotation(org.springframework.transaction.annotation.Transactional))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethod"/>
    </aop:config>
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="*"/>
        </tx:attributes>
    </tx:advice>
    
</beans>

现在可以编写对 UserService 的测试方法

package com.zaixs.test;

import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

//指定bean注入的配置文件
@ContextConfiguration(locations = {"classpath:application-context.xml"})
//使用标准的JUnit @RunWith注释来告诉JUnit使用Spring TestRunner
@RunWith(SpringJUnit4ClassRunner.class)
public class SpringTestCase extends AbstractJUnit4SpringContextTests {
}

package com.zaixs.service;

import com.zaixs.model.User;
import com.zaixs.test.SpringTestCase;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;


public class UserServiceTest extends SpringTestCase {

    @Autowired
    private UserService userService;

    @Test
    public void getTest() {
        User user = new User();
        user.setId(1);
        User user1 = userService.get(user);
        System.out.println("user1");
    }

}

配置 spring mvc：application-servlet.xml

<?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"
       xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
       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 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

    <mvc:annotation-driven/>
    <context:component-scan base-package="com.zaixs.controller"/>

    <!-- 对模型视图添加前后缀 -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"
          p:prefix="/WEB-INF/view/" p:suffix=".jsp"/>

</beans>

配置 web.xml

<?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>Archetype Created Web Application</display-name>

    <!-- 起始欢迎界面 -->
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
    </welcome-file-list>

    <!-- 读取spring配置文件 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:application-context.xml</param-value>
    </context-param>

    <!-- 设计路径变量值 -->
    <context-param>
        <param-name>webAppRootKey</param-name>
        <param-value>spring.root</param-value>
    </context-param>

    <!-- Spring字符集过滤器 -->
    <filter>
        <filter-name>SpringEncodingFilter</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>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>SpringEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- springMVC核心配置 -->
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <!--spingMVC的配置路径  -->
            <param-value>classpath:application-servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <!-- 拦截设置 -->
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>*.html</url-pattern>
    </servlet-mapping>

    <!--&lt;!&ndash; 错误跳转页面 &ndash;&gt;-->
    <!--<error-page>-->
    <!--&lt;!&ndash; 路径不正确 &ndash;&gt;-->
    <!--<error-code>404</error-code>-->
    <!--<location>/WEB-INF/errorpage/404.jsp</location>-->
    <!--</error-page>-->
    <!--<error-page>-->
    <!--&lt;!&ndash; 没有访问权限，访问被禁止 &ndash;&gt;-->
    <!--<error-code>405</error-code>-->
    <!--<location>/WEB-INF/errorpage/405.jsp</location>-->
    <!--</error-page>-->
    <!--<error-page>-->
    <!--&lt;!&ndash; 内部错误 &ndash;&gt;-->
    <!--<error-code>500</error-code>-->
    <!--<location>/WEB-INF/errorpage/500.jsp</location>-->
    <!--</error-page>-->

</web-app>

新建 UserController

package com.zaixs.controller;

import com.zaixs.model.User;
import com.zaixs.service.UserService;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import javax.annotation.Resource;

@Controller
public class UserController {

    @Resource
    private UserService userService;

    @RequestMapping("index.html")
    public String toLoginPage() {
        return "login";
    }

    @RequestMapping("/user/login.html")
    public ModelAndView login(User user) {
        if (userService.get(user) != null) {
            ModelAndView mav = new ModelAndView("main");
            mav.addObject("user", userService.get(user));
            mav.addObject("message", "登录成功");
            return mav;
        } else {
            return new ModelAndView("login", "message", "用户名密码错误");
        }
    }

}

在 WEB-INF 下新建文件夹 view，view 中新建两个 jsp 文件：login.jsp 和 main.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%--
  Created by IntelliJ IDEA.
  User: gaoeb
  Date: 2018/4/20
  Time: 08:59
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>管理系统登录</title>
</head>
<body>

<c:if test="${!empty message}">
    <c:out value="${message}"/>
</c:if>

<form action="${pageContext.request.contextPath}/user/login.html" method="post">
    用户名：<input type="text" name="username" value="admin"><br>
    密码：<input type="password" name="password" value="123456"><br>
    <input type="submit" value="登录">
</form>

</body>
</html>

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<html>
<body>
<h2>Hello World!</h2>
<c:out value="${message}"/>
</body>
</html>

以 tomcat 启动项目即可。

Spring + mybatis 的maven项目登录示例

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