javaweb各种框架组合案例(二)：maven+spring+springMVC+mybatis

1.mybatis是比较新的半自动orm框架，效率也比较高，优点是sql语句的定制，管理与维护，包括优化，缺点是对开发人员的sql功底要求较高，如果比较复杂的查询，表与表之间的关系映射到对象与对象之间的关系时，mapper.xml中的配置会恶心死你；

2.demo中只涉及到一张user表，同样的，我将演示ssm对单表的操作；

3.与案例一相同，我还是会对dao进行抽离，使得抽离出的核心dao具有通用性，其他模块dao只需继承核心dao即可；

4.demo整体包结构

数据库

create database ssjdbc;//创建ssjdbc数据库

//创建user表
CREATE TABLE `user` ( 
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `username` varchar(32) DEFAULT NULL,
  `password` varchar(32) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;

//插入数据3条
insert into user(username,password) values (1001,123),(1002,456),(1003,789);

5.各配置文件

（1）pom.xml

<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.xiaog</groupId>
  <artifactId>testssm</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  
  <dependencies>
      <!-- spring+springmvc顶级依赖包，包含spring-webmvc、spring-aop、spring-beans、
      spring-context、spring-core、spring-jcl、spring-expression、spring-web -->
      <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.1.5.RELEASE</version>
    </dependency>
    
    <!-- spring-aop所依赖的静态代理 ，
        使用aop方式管理事务，在service方法执行前开启事务，
        方法执行后提交事务，方法执行失败回滚事务-->
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjrt</artifactId>
        <version>1.8.0</version>
    </dependency>
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjweaver</artifactId>
        <version>1.8.0</version>
    </dependency>
    
    <!-- 使用jdbcTemplate中的事务实现 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>5.1.5.RELEASE</version>
    </dependency>
    
    <!-- 数据库方面 -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.47</version>
    </dependency>
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>1.1.10</version>
    </dependency>
    
    <!-- orm框架 -->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.5.0</version>
    </dependency>
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>1.3.0</version>
    </dependency>
    
    <!-- Logback -->
    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-classic</artifactId>
        <version>1.1.3</version>
    </dependency>
    <dependency>
        <groupId>org.logback-extensions</groupId>
        <artifactId>logback-ext-spring</artifactId>
        <version>0.1.2</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>jcl-over-slf4j</artifactId>
        <version>1.7.12</version>
    </dependency>
    
    <!-- jsp需要 -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>3.0-alpha-1</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.1.2</version>
    </dependency>
  </dependencies>
  
  <build>
  <defaultGoal>compile</defaultGoal>
      <plugins>
          <!-- maven插件 -->
         <plugin> 
            <groupId>org.apache.maven.plugins</groupId> 
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.1</version> 
            <configuration>
            <source>1.8</source>
            <target>1.8</target>            
                <encoding>UTF-8</encoding> 
            </configuration> 
         </plugin> 
         
        <!-- tomcat插件 -->
        <plugin>
            <groupId>org.apache.tomcat.maven</groupId>
            <artifactId>tomcat7-maven-plugin</artifactId>
            <version>2.1</version>
            <configuration>
                <port>9999</port>
                <path>/testssm</path>
                <uriEncoding>UTF-8</uriEncoding>
                <finalName>testssm</finalName>
                <server>tomcat7</server>
            </configuration>
        </plugin>     
      
      </plugins>
  </build>
</project>

（2）spring-context.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:context="http://www.springframework.org/schema/context"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop"
    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.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd"
        default-autowire="byName" default-lazy-init="true">
    <description>Spring公共配置 </description>
    <!-- 1.扫描包： @Repository @Service @Autowired @Resource  -->
    <context:component-scan base-package="com.xiaog.dao,com.xiaog.service" />
    
    <!-- 2.加载配置文件 -->
    <context:property-placeholder location="classpath:jdbc.properties" />
    
    <!-- 3.配置连接池 ：druid连接池 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}" />
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
        <!-- 初始化连接数量 -->
       <property name="initialSize" value="5" />
       <!-- 最大连接数 -->
       <property name="maxActive" value="100" />
       <!-- 最小连接数 -->
       <property name="minIdle" value="5" />
       <!-- 配置获取连接等待超时的时间 -->
       <property name="maxWait" value="120000" />
       <!-- 超过时间限制是否回收 -->
       <property name="removeAbandoned" value="true" />
       <!-- 超过时间限制多长 -->
       <property name="removeAbandonedTimeout" value="1800" />
       <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
       <property name="timeBetweenEvictionRunsMillis" value="120000" />
       <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
       <property name="minEvictableIdleTimeMillis" value="300000" />
       <!-- 用来检测连接是否有效的sql，要求是一个查询语句 -->
       <property name="validationQuery" value="SELECT 1" />
       <!-- 申请连接的时候检测 -->
       <property name="testWhileIdle" value="true" />
       <!-- 申请连接时执行validationQuery检测连接是否有效，配置为true会降低性能 -->
       <property name="testOnBorrow" value="false" />
       <!-- 归还连接时执行validationQuery检测连接是否有效，配置为true会降低性能 -->
       <property name="testOnReturn" value="false" />
       <!-- 打开PSCache，并且指定每个连接上PSCache的大小 -->
       <property name="poolPreparedStatements" value="true" />
       <property name="maxPoolPreparedStatementPerConnectionSize" value="20" />
       <property name="defaultAutoCommit" value="false" />
       <!-- 配置监控统计拦截的filters -->
       <property name="filters" value="stat"/>
    </bean>

    <!-- 4.spring集成mybatis  -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="configLocation" value="classpath:mybatis-config.xml" />
        <property name="mapperLocations" value="classpath:mapper/*.xml" />
    </bean>
    
   <!-- 5.配置事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>
    <!-- 6.配置aop -->
    <!-- 配置通知： 定位方法 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="*" />
        </tx:attributes>
    </tx:advice>
    <!-- 配置切面 -->
    <aop:config>
        <!-- 定位具体的类：完整类名，使用通配符 -->
        <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.xiaog.service.*.*(..))" />
    </aop:config>        
   
</beans>

（3）spring-mvc.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:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    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-4.0.xsd
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
        
        <!-- 1.启动自动扫描 -->
        <context:component-scan base-package="com.xiaog.controller" />
        
        <!-- 2.注册MVC注解驱动 -->
        <mvc:annotation-driven />
        
        <!-- 3.配置静态资源    css js imgs -->
        <mvc:resources location="/resources/**" mapping="/resources"/>        
        <mvc:resources location="/webapp/static/**" mapping="/webapp/static"/>     
                 
        <!-- 4.配置视图解析器 -->
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name = "prefix" value="/" /><!-- 前缀 -->
            <property name = "suffix" value = ".jsp" /><!-- 后缀 -->
             <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />  
        </bean>

</beans>

（4）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>
    <typeAliases>
        <package name="com.xiaog.entity" />
    </typeAliases>  
</configuration>

（5）logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <!-- 控制台输出 -->   
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
       <!-- 日志输出编码 -->  
       <!-- <Encoding>UTF-8</Encoding>    -->
        <layout class="ch.qos.logback.classic.PatternLayout">   
             <!--格式化输出：%d表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符--> 
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n   
            </pattern>   
        </layout>   
    </appender>   
    <!-- 日志输出级别 -->
    <root level="INFO"> 
        <appender-ref ref="STDOUT" />   
    </root> 
    <!-- 打印sql语句 -->
    <logger name="com.xiaog.dao" level="DEBUG" />
</configuration>

（6）jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssjdbc?useSSL=false&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=root

(7)UserMapper.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.xiaog.dao.UserDao" >
  <resultMap id="BaseResultMap" type="User" >
    <id column="id" property="id" jdbcType="INTEGER" />
    <result column="username" property="username" jdbcType="VARCHAR" />
    <result column="password" property="password" jdbcType="VARCHAR" />
  </resultMap>
  <sql id="Base_Column_List" >
    id, username, password
  </sql>
  
  <select id="getOne" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
    select 
    <include refid="Base_Column_List" />
    from user
    where id = #{id,jdbcType=INTEGER}
  </select>
  
  <select id="getList" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
    select 
    <include refid="Base_Column_List" />
    from user
    <where>
      <if test="username != null" >
       and username = #{username,jdbcType=VARCHAR}
      </if>
      <if test="password != null" >
       and password = #{password,jdbcType=VARCHAR}
      </if>
    </where>
  </select>
  
  <delete id="delete" parameterType="java.lang.Integer" >
    delete from user
    where id = #{id,jdbcType=INTEGER}
  </delete>
  
  <insert id="insert" parameterType="User" >
    insert into user
    <trim prefix="(" suffix=")" suffixOverrides="," >
      <if test="id != null" >
        id,
      </if>
      <if test="username != null" >
        username,
      </if>
      <if test="password != null" >
        password,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides="," >
      <if test="id != null" >
        #{id,jdbcType=INTEGER},
      </if>
      <if test="username != null" >
        #{username,jdbcType=VARCHAR},
      </if>
      <if test="password != null" >
        #{password,jdbcType=VARCHAR},
      </if>
    </trim>
  </insert>
  
  <update id="update" parameterType="User" >
    update user
    <set >
      <if test="username != null" >
        username = #{username,jdbcType=VARCHAR},
      </if>
      <if test="password != null" >
        password = #{password,jdbcType=VARCHAR},
      </if>
    </set>
    where id = #{id,jdbcType=INTEGER}
  </update>
  
</mapper>

（8）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_3_0.xsd" version="3.0">
  <display-name>testssm</display-name>
  <!-- spring配置文件 -->
      <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-context.xml</param-value>
    </context-param>  
  <!-- spring监听器 -->
      <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
     <!-- 字符编码过滤器   spring web自动提供一个 -->
    <filter>
        <filter-name>encodingFilter</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>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    
        

    <!-- spring  mvc 配置  【中央控制器/前端控制器/总控】 -->
    <servlet>  
        <servlet-name>spring-mvc</servlet-name>  
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  
         <!-- 配置Spring mvc下的配置文件的位置和名称 -->
        <init-param>
             <param-name>contextConfigLocation</param-name>
             <param-value>classpath:spring-mvc.xml</param-value>
         </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <!-- 可以配置扩展名，*.do -->  
    <servlet-mapping>  
        <servlet-name>spring-mvc</servlet-name>  
        <url-pattern>/</url-pattern>  
    </servlet-mapping>
  
       <!-- 添加日志监听器 -->  
    <context-param>  
        <param-name>logbackConfigLocation</param-name>  
        <param-value>classpath:logback.xml</param-value>  
    </context-param>  
    <listener>  
        <listener-class>ch.qos.logback.ext.spring.web.LogbackConfigListener</listener-class>  
    </listener> 
  
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

6.实体类User

package com.xiaog.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 == null ? null : username.trim();
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password == null ? null : password.trim();
    }

    @Override
    public String toString() {
        return "User [id=" + id + ", username=" + username + ", password=" + password + "]";
    }
    
}

7.核心Dao接口及其实现

package com.xiaog.core.dao;

import java.util.List;

public interface CoreDao<T> {
    
    int insert(T t);
    
    int delete(int id);
    
    int update(T t);
    
    T getOne(int id);
    
    List<T> getList(T t);
    
}

package com.xiaog.core.dao.impl;

import java.lang.reflect.ParameterizedType;
import java.util.List;

import org.mybatis.spring.support.SqlSessionDaoSupport;

import com.xiaog.core.dao.CoreDao;

public class CoreDaoImpl<T> extends SqlSessionDaoSupport implements CoreDao<T> {
    
    private Class<T> clazz;
    private static String PREFIX;
    
    @SuppressWarnings("unchecked")
    public CoreDaoImpl() {
        this.clazz =  (Class<T>)((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0];
        PREFIX = "com.xiaog.dao."+clazz.getSimpleName()+"Dao.";
    }
    
    @Override
    public int insert(T t) {
        return super.getSqlSession().insert(PREFIX+"insert",t);
    }

    @Override
    public int delete(int id) {
        return super.getSqlSession().delete(PREFIX+"delete", id);
    }

    @Override
    public int update(T t) {
        return super.getSqlSession().update(PREFIX+"update", t);
    }

    @Override
    public T getOne(int id) {
        return super.getSqlSession().selectOne(PREFIX+"getOne", id);
    }

    @Override
    public List<T> getList(T t) {
        return super.getSqlSession().selectList(PREFIX+"getList", t);
    }

}

8.模块dao接口及其实现

package com.xiaog.dao;

import com.xiaog.core.dao.CoreDao;
import com.xiaog.entity.User;

public interface UserDao extends CoreDao<User> {
    
}

package com.xiaog.dao.impl;

import org.springframework.stereotype.Repository;

import com.xiaog.core.dao.impl.CoreDaoImpl;
import com.xiaog.dao.UserDao;
import com.xiaog.entity.User;

@Repository
public class UserDaoImpl extends CoreDaoImpl<User> implements UserDao {
    
}

9.service接口及其实现

package com.xiaog.service;

import com.xiaog.entity.User;

public interface UserService {

    User login(User user);
    
}

package com.xiaog.service.impl;

import java.util.List;

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

import com.xiaog.dao.UserDao;
import com.xiaog.entity.User;
import com.xiaog.service.UserService;

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserDao userDao;
    
    @Override
    public User login(User user) {
        List<User> users = userDao.getList(user);
        if(users!=null && users.size()>0) {
            return users.get(0);
        }else {
            return null;
        }
    }

}

10.controller

package com.xiaog.controller;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
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.xiaog.entity.User;
import com.xiaog.service.UserService;

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

    @Autowired
    private UserService userService;
    
    private final static Logger logger = LoggerFactory.getLogger(UserController.class);
    
    @RequestMapping(value = "/login",params= {"username","password","username!=","password!="})
    public String login(Model model,User user) {
        user = userService.login(user);
        logger.info("user="+user);
        model.addAttribute("user", user);
        return "result";
    }
    
}

11.测试登录的jsp页面

（1）index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
    <form action="user/login" method="post">
        <div>
            <label>username</label>
            <input type="text" name="username"/>
        </div>
        <div>
            <label>password</label>
            <input type="password" name="password"/>
        </div>
        <div>
            <input type="submit" value="登录">
        </div>
    </form>
</body>
</html>

（2）result.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
    username=${user}
</body>
</html>

12.启动项目

项目右击-->run as-->maven build->在Goals中填tomcat7:run，然后apply，run就启动项目了

浏览器输入http://localhost:9999/testssm