《SSM框架搭建》二.mybatis3，spring4整合

感谢学习文章来自http://www.cnblogs.com/xdp-gacl/p/4271627.html，spring3修改为spring4.还有提示驱动过期的问题,是由于使用了mysql-connector-java 6.X的原因

1，首先构建一个maven web项目

2,创建一个用户表，用于基本的数据查询，这里使用的是mysql数据库

DROP TABLE IF EXISTS user;
CREATE TABLE `user` (
  `user_id`  varchar(30) NOT NULL,
  `user_name` varchar(50) DEFAULT NULL,
  `age` int(11) DEFAULT NULL,
  `address` varchar(200) DEFAULT NULL,
  PRIMARY KEY (`user_id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;

3，使用generator生成该表对应的代码，将生成的代码copy到项目中

在G盘创建一个generator文件夹，里面创建一个generator.xml的文件，配置如下代码，手动修改里面的数据库配置，在http://mvnrepository.com/手动下载需要的两个jar包,搜索MySQL-connector-java，和generator

cmd切换到该目录下之后，执行命令java -jar mybatis-generator-core-1.3.2.jar -configfile generator.xml -overwrite

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
    <!-- 数据库驱动包位置 -->
    <classPathEntry location="G:generatormysql-connector-java-5.1.38.jar" /> 
    <!-- <classPathEntry location="C:oracleproduct10.2.0db_1jdbclibojdbc14.jar" />-->
    <context id="DB2Tables" targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressAllComments" value="true" />
        </commentGenerator>
        <!-- 数据库链接URL、用户名、密码 -->
         <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://@localhost:3306/test?characterEncoding=UTF-8" userId="root" password="password"> 
        <!--<jdbcConnection driverClass="oracle.jdbc.driver.OracleDriver" connectionURL="jdbc:oracle:thin:@localhost:1521:orcl" userId="msa" password="msa">-->
        </jdbcConnection>
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>
        <!-- 生成模型的包名和位置 -->
        <javaModelGenerator targetPackage="com.model" targetProject="G:generatorsrc">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>
        <!-- 生成的映射文件包名和位置 -->
        <sqlMapGenerator targetPackage="com.mapper" targetProject="G:generatorsrc">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>
        <!-- 生成DAO的包名和位置 -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.dao" targetProject="G:generatorsrc">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>
        <!-- 要生成那些表(更改tableName和domainObjectName就可以) -->
        <table tableName="user" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" />
        <!-- <table tableName="course_info" domainObjectName="CourseInfo" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" />
        <table tableName="course_user_info" domainObjectName="CourseUserInfo" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" /> -->
    </context>
</generatorConfiguration>

4，在resources下创建数据库配置文件dbconfig.properties,这里的数据库账号密码无法命名为username和password，否则会报密码错误，难道是限制了？

driverClassName=com.mysql.jdbc.Driver
validationQuery=SELECT 1
url=jdbc:mysql://localhost:3306/llw_test?characterEncoding=UTF-8
jdbc_username=root
jdbc_password=password

5，创建spring配置文件spring.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"
    xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd">

    <!-- 引入dbconfig.properties属性文件 -->
    <context:property-placeholder location="classpath:dbconfig.properties" />
    <!-- 自动扫描(自动注入)，扫描me.gacl.service这个包以及它的子包的所有使用@Service注解标注的类 -->
    <context:component-scan base-package="me.gacl.service" />
</beans>

再创建spring-mybatis.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:tx="http://www.springframework.org/schema/tx"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="
http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd 
http://www.springframework.org/schema/tx 
http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
http://www.springframework.org/schema/aop 
http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
">

    <!-- JNDI方式配置数据源 -->
    <!-- <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean"> 
        <property name="jndiName" value="${jndiName}"></property> </bean> -->
    <!-- ========================================配置数据源========================================= -->
    <!-- 配置数据源，使用的是alibaba的Druid(德鲁伊)数据源 -->
    <bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
        init-method="init" destroy-method="close">
        <property name="driverClassName" value="${driverClassName}" />
        <property name="url" value="${url}" />
        <property name="username" value="${jdbc_username}" />
        <property name="password" value="${jdbc_password}" />
        <!-- 初始化连接大小 -->
        <property name="initialSize" value="0" />
        <!-- 连接池最大使用连接数量 -->
        <property name="maxActive" value="20" />
        <!-- 连接池最小空闲 -->
        <property name="minIdle" value="0" />
        <!-- 获取连接最大等待时间 -->
        <property name="maxWait" value="60000" />
        <!-- <property name="poolPreparedStatements" value="true" /> <property 
            name="maxPoolPreparedStatementPerConnectionSize" value="33" /> -->
        <property name="validationQuery" value="${validationQuery}" />
        <property name="testOnBorrow" value="false" />
        <property name="testOnReturn" value="false" />
        <property name="testWhileIdle" value="true" />
        <!-- 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="60000" />
        <!-- 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="25200000" />
        <!-- 打开removeAbandoned功能 -->
        <property name="removeAbandoned" value="true" />
        <!-- 1800秒，也就是30分钟 -->
        <property name="removeAbandonedTimeout" value="1800" />
        <!-- 关闭abanded连接时输出错误日志 -->
        <property name="logAbandoned" value="true" />
        <!-- 监控数据库 -->
        <!-- <property name="filters" value="stat" /> -->
        <property name="filters" value="mergeStat" />
    </bean>
    <!-- ========================================分隔线========================================= -->
    <!-- ========================================针对myBatis的配置项============================== -->
    <!-- 配置sqlSessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 实例化sqlSessionFactory时需要使用上述配置好的数据源以及SQL映射文件 -->
        <property name="dataSource" ref="dataSource" />
        <!-- 自动扫描me/gacl/mapping/目录下的所有SQL映射的xml文件, 省掉Configuration.xml里的手工配置 value="classpath:com/mapper/*.xml"指的是classpath(类路径)下com.mapping包中的所有xml文件 
            UserMapper.xml位于com.mapping包下，这样UserMapper.xml就可以被自动扫描 -->
        <property name="mapperLocations" value="classpath:com/mapper/*.xml" />
    </bean>
    <!-- 配置扫描器 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 扫描com.dao这个包以及它的子包下的所有映射接口类 -->
        <property name="basePackage" value="com.dao" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
    </bean>

    <!-- ========================================分隔线========================================= -->
    <!-- 配置Spring的事务管理器 -->
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>

    <!-- 注解方式配置事物 -->
    <!-- <tx:annotation-driven transaction-manager="transactionManager" /> -->

    <!-- 拦截器方式配置事物 -->
    <tx:advice id="transactionAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="add*" propagation="REQUIRED" />
            <tx:method name="append*" propagation="REQUIRED" />
            <tx:method name="insert*" propagation="REQUIRED" />
            <tx:method name="save*" propagation="REQUIRED" />
            <tx:method name="update*" propagation="REQUIRED" />
            <tx:method name="modify*" propagation="REQUIRED" />
            <tx:method name="edit*" propagation="REQUIRED" />
            <tx:method name="delete*" propagation="REQUIRED" />
            <tx:method name="remove*" propagation="REQUIRED" />
            <tx:method name="repair" propagation="REQUIRED" />
            <tx:method name="delAndRepair" propagation="REQUIRED" />

            <tx:method name="get*" propagation="SUPPORTS" />
            <tx:method name="find*" propagation="SUPPORTS" />
            <tx:method name="load*" propagation="SUPPORTS" />
            <tx:method name="search*" propagation="SUPPORTS" />
            <tx:method name="datagrid*" propagation="SUPPORTS" />

            <tx:method name="*" propagation="SUPPORTS" />
        </tx:attributes>
    </tx:advice>
    <aop:config>
        <aop:pointcut id="transactionPointcut"
            expression="execution(* com.service..*Impl.*(..))" />
        <aop:advisor pointcut-ref="transactionPointcut"
            advice-ref="transactionAdvice" />
    </aop:config>


    <!-- 配置druid监控spring jdbc  ，上面事务配置要注意修改为对应包，且服务类的实现类的后缀名要一致 -->
    <bean id="druid-stat-interceptor"
        class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor">
    </bean>
    <bean id="druid-stat-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut"
        scope="prototype">
        <property name="patterns">
            <list>
                <value>com.service.*</value>
            </list>
        </property>
    </bean>
    <aop:config>
        <aop:advisor advice-ref="druid-stat-interceptor"
            pointcut-ref="druid-stat-pointcut" />
    </aop:config>

</beans>

6.修改pom文件，引入需要的jar包,修改jar包版本的话，如果已经部署，则需要彻底删除部署上去的项目，重新部署，否则会有重复的包冲突

这里试图修改mybatis包为最新的3.4.0但是部署时报错，还没有能解决问题

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>group_test</groupId>
    <artifactId>mavenSpring</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>mavenSpring</name>
    <url>http://maven.apache.org</url>
    <dependencies>
        <!-- 添加Spring-core包 -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>4.3.2.RELEASE</version>
        </dependency>
        <!-- 添加spring-context包 -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.3.2.RELEASE</version>
        </dependency>
        <!-- 添加spring-tx包 -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-tx -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>4.3.2.RELEASE</version>
        </dependency>
        <!-- 添加spring-jdbc包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.3.2.RELEASE</version>
        </dependency>
        <!-- 为了方便进行单元测试，添加spring-test包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>4.3.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>4.3.2.RELEASE</version>
        </dependency>
        <!--添加aspectjweaver包 -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.8.9</version>
        </dependency>
        <!-- 添加mybatis的核心包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.2.8</version>
        </dependency>
        <!-- 添加mybatis与Spring整合的核心包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>
        <!-- 添加servlet3.0核心包 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.3.2-b01</version>
        </dependency>
        <!-- jstl -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!-- 添加mysql驱动包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>6.0.3</version>
        </dependency>        
        <!-- 添加druid连接池包 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.12</version>
        </dependency>
        <!-- 添加junit单元测试包 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>mavenSpring</finalName>
    </build>
</project>

7.创建在com下创建service包，创建UserService接口

public interface UserServiceI {

    /**添加用户*/
    void addUser(User user);
    
    /** 根据用户id获取用户*/
    User getUserById(String userId);
    
}

8.在该包下创建一个imp包，创建UserServiceImp实现类

import java.util.List;

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

import com.dao.UserMapper;
import com.model.User;
import com.service.UserServiceI;
/**
 * @author gacl
 * 使用@Service注解将UserServiceImpl类标注为一个service
 * service的id是userService
 */
@Service("userService")
public class UserServiceImpl implements UserServiceI {

    /**
     * 使用@Autowired注解标注userMapper变量，
     * 当需要使用UserMapper时，Spring就会自动注入UserMapper
     */
    @Autowired
    private UserMapper userMapper;//注入dao

    public void addUser(User user) {
        userMapper.insert(user);
    }

    public User getUserById(String userId) {
        return userMapper.selectByPrimaryKey(userId);
    }

}

9.创建一个测试包test，创建类JunitTest.java,使用单元测试工具类进行测试

package test;

import java.util.Date;
import java.util.UUID;


import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.model.User;
import com.service.UserServiceI;

public class JunitTest {
     private UserServiceI userService;
        
        /**
         * 这个before方法在所有的测试方法之前执行，并且只执行一次
         * 所有做Junit单元测试时一些初始化工作可以在这个方法里面进行
         * 比如在before方法里面初始化ApplicationContext和userService
         */
        @Before
        public void before(){
            //使用"spring.xml"和"spring-mybatis.xml"这两个配置文件创建Spring上下文
            ApplicationContext ac = new ClassPathXmlApplicationContext(new String[]{"spring.xml","spring-mybatis.xml"});
            //从Spring容器中根据bean的id取出我们要使用的userService对象
            userService = (UserServiceI) ac.getBean("userService");
        }
        
        @Test
        public void testAddUser(){
            //ApplicationContext ac = new ClassPathXmlApplicationContext(new String[]{"spring.xml","spring-mybatis.xml"});
            //UserServiceI userService = (UserServiceI) ac.getBean("userService");
            User user = new User();
            user.setUserId(UUID.randomUUID().toString().replaceAll("-", ""));
            user.setUserName("曹操");
            user.setAddress("北京");
            user.setAge(44);
            userService.addUser(user);
        }
}

配置log4j日志打印文件Log4j.properties

log4j.rootLogger=DEBUG, stdout 
log4j.logger.org.mybatis=DEBUG 
log4j.appender.stdout=org.apache.log4j.ConsoleAppender 
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout 
log4j.appender.stdout.layout.ConversionPattern=%5p %d %C: %m%n

当前完整结构如下

10.还可以使用Spring提供的Junit测试框架进行单元测试，在test新建一个SpringJunitTest类，代码如下：

package com.test;

import java.util.Date;
import java.util.UUID;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.model.User;
import com.service.UserServiceI;

@RunWith(SpringJUnit4ClassRunner.class)
//配置了@ContextConfiguration注解并使用该注解的locations属性指明spring和配置文件之后，
@ContextConfiguration(locations = {"classpath:spring.xml", "classpath:spring-mybatis.xml" })
public class SpringJunitTest {

    //注入userService
    @Autowired
    private UserServiceI userService;
    
//    @Test
    public void testAddUser(){
        User user = new User();
        user.setUserId(UUID.randomUUID().toString().replaceAll("-", ""));
        user.setUserName("刘备");
        userService.addUser(user);
    }
    
    @Test
    public void testGetUserById(){
        String userId = "165233ff881f480d8071724a27635761";
        User user = userService.getUserById(userId);
        System.out.println(user.getUserName());
    }
}

11.在web服务器中进行测试，修改配置文件web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
                      http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    version="3.0">
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>

    <listener>
        <description>Spring监听器</description>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!-- ContextLoaderListener初始化Spring上下文时需要使用到的contextConfigLocation参数 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <!-- 配置spring.xml和spring-mybatis.xml这两个配置文件的位置，固定写法 -->
        <param-value>classpath:spring.xml,classpath:spring-mybatis.xml</param-value>
    </context-param>
</web-app>

12,在com下创建包controller.新建类UserServlet

package com.controller;
import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


import org.springframework.context.ApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

import com.model.User;
import com.service.UserServiceI;

import javax.servlet.http.HttpServlet;
/**
 * @author gacl
 * @WebServlet是Servlet3.0提供的注解，目的是将一个继承了HttpServlet类的普通java类标注为一个Servlet
 * UserServlet使用了@WebServlet标注之后，就不需要在web.xml中配置了
 */
@WebServlet("/UserServlet")
public class UserServlet extends HttpServlet{
     //处理业务逻辑的userService
    private UserServiceI userService;
    
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //获取所有的用户信息
        List<User> lstUsers = userService.getAllUser();
        request.setAttribute("lstUsers", lstUsers);
        request.getRequestDispatcher("/index.jsp").forward(request, response);
    }
    
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        this.doGet(request, response);
    }

    public void init() throws ServletException {
        //在Servlet初始化时获取Spring上下文对象(ApplicationContext)
        ApplicationContext ac = WebApplicationContextUtils.getWebApplicationContext(this.getServletContext());
        //从ApplicationContext中获取userService
        userService = (UserServiceI) ac.getBean("userService");
    }
}

13.在service中增加新方法获取所有用户，对应实现类中增加实现方法

    /**获取所有用户*/
    List<User> getAllUser();

    public List<User> getAllUser() {
        return userMapper.getAllUser();
    }

对应mapper接口类中实现方法

    List<User> getAllUser();

对应mapper文件中增加查询sql

    <select id="getAllUser" resultMap="BaseResultMap">
        select user_id, user_name, user_birthday, user_salary from t_user
    </select>

14.修改index.jsp

<%@ page language="java" pageEncoding="UTF-8"%>
<%--引入JSTL核心标签库 --%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE html>
<html>
    <head>
        <title>显示用户信息</title>
        <style type="text/css">
            table,td{
                border: 1px solid;
                border-collapse: collapse;
            }
        </style>
    </head>
    <body>
        <table>
            <tr>
                <td>用户ID</td>
                <td>用户名</td>
                <td>用户年龄</td>
            </tr>
            <%--遍历lstUsers集合中的User对象 --%>
            <c:forEach var="user" items="${lstUsers}">
                <tr>
                    <td>${user.userId}</td>
                    <td>${user.userName}</td>
                </tr>
            </c:forEach>
        </table>
    </body>
</html>

15,部署到服务器访问http://127.0.0.1:8080/mybatisSpring/UserServlet

java -jar mybatis-generator-core-1.3.2.jar -configfile generator.xml -overwrite

 <!-- 配置druid监控spring jdbc -->