使用Eclipse，Maven简单搭建Spring+MyBatis

Posted 2020-10-04 hellboy06

 

1、新建一个Maven Project

使用Eclipse自带的Maven插件，自动创建一个基于Maven的Web工程；（前提是开发环境一定要配置好Maven）

 

 

 

选择archetype为maven-archetype-webapp：

 

 

设置：

       GroupId：com.study（正式项目为公司网址倒写）

       ArtifactId：SMPro（项目名称，[模块名称]）

 

 

2、修复jsp页面报错

jsp页面报错，因为在构建路径中没有javax.servlet.http.HttpServlet，在pom.xml文件中添加servlet依赖包：

<dependency>        <groupId>javax.servlet</groupId>        <artifactId>javax.servlet-api</artifactId>        <version>3.1.0</version>        <!-- 只在编译和测试时运行 -->        <scope>provided</scope> </dependency>

3、完善项目目录结构

在Navigator视图下，补全目录结构如下：

 

 

右键项目-Properties，打开Java Build Path，补全Source下的目录，并观察Default output folder是否为***/target/classes目录；

 

 

4、添加该测试项目所需依赖jar包：

<dependencies>        <!-- 使用junit4 -->        <dependency>               <groupId>junit</groupId>               <artifactId>junit</artifactId>               <version>4.11</version>               <scope>test</scope>        </dependency>        <dependency>               <groupId>javax.servlet</groupId>               <artifactId>javax.servlet-api</artifactId>               <version>3.1.0</version>               <!-- 只在编译和测试时运行 -->               <scope>provided</scope>        </dependency>               <!-- 补全项目依赖 -->        <!-- 1:日志            slf4j是规范/接口          日志实现:log4j,logback,common-logging          这里使用:slf4j + log4j        -->        <dependency>               <groupId>org.slf4j</groupId>               <artifactId>slf4j-log4j12</artifactId>               <version>1.7.2</version>        </dependency>        <!-- 2:数据库相关依赖 -->         <dependency>            <groupId>mysql</groupId>            <artifactId>mysql-connector-java</artifactId>            <version>5.1.39</version>            <scope>runtime</scope>        </dependency>        <!-- c3p0数据库连接池 -->        <dependency>            <groupId>c3p0</groupId>            <artifactId>c3p0</artifactId>            <version>0.9.1.2</version>        </dependency>         <!-- 3:DAO框架依赖：MyBatis依赖 -->        <dependency>            <groupId>org.mybatis</groupId>            <artifactId>mybatis</artifactId>            <version>3.3.0</version>        </dependency>        <!-- MyBatis自身实现的spring整合依赖 -->        <dependency>            <groupId>org.mybatis</groupId>            <artifactId>mybatis-spring</artifactId>            <version>1.2.3</version>        </dependency>        <!-- 4:spring依赖 -->        <!-- 1) spring核心依赖-->        <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-context</artifactId>            <version>4.1.7.RELEASE</version>        </dependency>        <!-- 2) spring dao层依赖-->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-jdbc</artifactId>            <version>4.1.7.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-tx</artifactId>            <version>4.1.7.RELEASE</version>        </dependency> </dependencies>

5、建库建表

--创建数据库 CREATE DATABASE sm_project; USE sm_project; --创建用户表 CREATE TABLE tb_user(        `user_id`                            INT PRIMARY KEY AUTO_INCREMENT COMMENT \'用户ID\',        `user_name`       VARCHAR(30) COMMENT \'用户名\',        `user_birthday`   DATE COMMENT \'用户生日\',        `user_salary`              DOUBLE COMMENT \'用户工资\' )ENGINE=InnoDB DEFAULT CHARSET=UTF8 COMMENT=\'用户表\';

6、创建实体类

 

 

@SuppressWarnings("serial") public class User implements Serializable {        private int id;        private String name;        private Date birthday;        private double salary;     //setter()/getter()/toString()略 }

7、定义DAO接口

 

 

public interface IUserDAO {        public void insert(User user);        public void delete(int id);        public void update(User user);        public User findById(int id);        public List<User> findAll(); }

8、MyBatis中SQL映射文件：IUserDAO.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"> <!-- 其中命名空间指向与该文件同名的DAO层接口 --> <mapper namespace="com.study.dao.IUserDAO">        <!-- 通过resultMap解决实体类属性与数据库字段名不一致的问题 -->        <resultMap type="com.study.entity.User" id="userResult">               <!--                      其中id为主键，result为普通字段                      property对应实体类属性，column对应字段名（更准确的说应该是查询结果集中的字段名）               -->               <id property="id" column="user_id"/>               <result property="name" column="user_name"/>               <result property="birthday" column="user_birthday"/>               <result property="salary" column="user_salary"/>        </resultMap>        <!-- 插入数据后获得自增主键的值 -->        <insert id="insert" keyProperty="id" keyColumn="user_id">               INSERT INTO tb_user                      (user_name,user_birthday,user_salary)               VALUES                      (#{name},#{birthday},#{salary})        </insert>        <!-- 修改用户内容 -->        <update id="update">               UPDATE tb_user               SET                      user_name=#{name},                      user_birthday=#{birthday},                      user_salary=#{salary}               WHERE                      user_id=#{id}        </update>        <!-- 根据id删除用户 -->        <delete id="delete">               DELETE FROM tb_user WHERE user_id=#{id}        </delete>        <!-- 根据id查询用户 -->        <select id="findById" resultMap="userResult">               SELECT user_id,user_name,user_birthday,user_salary FROM tb_user WHERE user_id=#{id}        </select>        <!-- 查询所有用户 -->        <select id="findAll" resultMap="userResult">               SELECT user_id,user_name,user_birthday,user_salary FROM tb_user        </select> </mapper>

9、MyBatis的配置文件：mybatis-config.xml

虽然后面使用Spring托管MyBatis，但是对于MyBatis的专属设置还是需要在这里设置；

 

 

<?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>     <!-- 配置全局属性 -->     <settings>         <!-- 使用jdbc的getGeneratedKeys获取数据库自增主键值 -->         <setting name="useGeneratedKeys" value="true"/>         <!-- 使用列别名替换列名 默认:true -->         <setting name="useColumnLabel" value="true"/>         <!-- 开启驼峰命名转换 -->         <setting name="mapUnderscoreToCamelCase" value="true"/>     </settings> </configuration>

10、Spring与MyBatis整合配置文件：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:context="http://www.springframework.org/schema/context"        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">        <!-- 配置整合MyBatis -->        <!-- 1:配置数据库相关参数 properties属性：${url} -->        <context:property-placeholder location="classpath:jdbc.properties" />        <!-- 2:数据库连接池 -->        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">               <!-- 配置连接池属性 -->               <property name="driverClass" value="${jdbc.driver}" />               <property name="jdbcUrl" value="${jdbc.url}" />               <property name="user" value="${jdbc.username}" />               <property name="password" value="${jdbc.password}" />                 <!-- c3p0连接池的私有属性 -->               <property name="maxPoolSize" value="${maxPoolSize}" />               <property name="minPoolSize" value="${minPoolSize}" />               <!-- 关闭连接后不自动commit -->               <property name="autoCommitOnClose" value="${autoCommitOnClose}" />               <!-- 获取连接超时时间 -->               <property name="checkoutTimeout" value="${checkoutTimeout}" />               <!-- 当获取连接失败重试次数 -->               <property name="acquireRetryAttempts" value="${acquireRetryAttempts}" />        </bean>               <!-- spring + MyBatis 精华 -->     <!-- 约定大于配置 -->     <!-- 3:配置SqlSessionFactory对象 -->     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">         <!-- 注入数据库连接池 -->         <property name="dataSource" ref="dataSource"/>         <!-- 配置MyBatis全局配置文件：mybatis-config.xml -->         <property name="configLocation" value="classpath:mybatis-config.xml"/>         <!-- 扫描entity包 使用别名 org.asset.entity.User -> User -->         <property name="typeAliasesPackage" value="com.study.entity"/>         <!-- 扫描sql配置文件:mapper需要的xml文件 -->         <property name="mapperLocations" value="classpath:mapper/*.xml"/>     </bean>       <!-- 4:配置扫描DAO接口包，动态实现DAO接口，并注入到spring容器中 -->     <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">         <!-- 给出需要扫描DAO接口包 -->         <property name="basePackage" value="com.study.dao"/>         <!-- 注入sqlSessionFactory -->         <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>     </bean>   </beans>

11、数据库连接配置文件：jdbc.properties

 

 

#jdbc.properties jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/sm_project?useUnicode=true&characterEncoding=utf-8 jdbc.username=root jdbc.password=   maxPoolSize=30 minPoolSize=10 autoCommitOnClose=false checkoutTimeout=1000 acquireRetryAttempts=2

12、日志配置文件：log4j.properties

 

 

log4j.rootLogger=DEBUG, 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

13、测试

 

 

 

package com.study.dao; import java.util.Date; import java.util.List; import org.junit.Test; import org.junit.runner.RunWith; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import com.study.entity.User; @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration({"classpath:spring-mybatis.xml"}) public class IUserDAOTest {        private Logger logger = LoggerFactory.getLogger(IUserDAOTest.class);        @Autowired        private IUserDAO userDAO;        @Test        public void testInsert() {               User user = new User();               user.setBirthday(new Date());               user.setName("James");               user.setSalary(15000.0);               this.userDAO.insert(user);               logger.info("insert the user={}",user);               this.userDAO.delete(user.getId());               User u = this.userDAO.findById(user.getId());               logger.info("after delete the user={}", u);        }        @Test        public void testUpdate() {               User user = new User();               user.setBirthday(new Date());               user.setName("Daniel");               user.setSalary(13000.0);               logger.info("before update the user={}", user);               this.userDAO.insert(user);               user.setSalary(22000.0);               this.userDAO.update(user);               User u = this.userDAO.findById(user.getId());               logger.info("after update the user={}", u);               this.userDAO.delete(u.getId());        }        @Test        public void testFindAll() {               List<User> users = this.userDAO.findAll();               logger.info("all the users={}", users);        } }

打印日志结果如下：

2017-08-24 15:21:06,805 [main] INFO  [com.study.dao.IUserDAOTest] - all the users=[User [id=1, name=John, birthday=Wed Aug 23 00:00:00 CST 2017, salary=10000.0], User [id=2, name=Smith, birthday=Thu Aug 24 00:00:00 CST 2017, salary=20000.0], User [id=4, name=King, birthday=Thu Aug 24 00:00:00 CST 2017, salary=30000.0]]

2017-08-24 15:21:06,818 [main] INFO  [com.study.dao.IUserDAOTest] - insert the user=User [id=11, name=James, birthday=Thu Aug 24 15:21:06 CST 2017, salary=15000.0] 2017-08-24 15:21:06,825 [main] INFO  [com.study.dao.IUserDAOTest] - after delete the user=null

2017-08-24 15:21:06,834 [main] INFO  [com.study.dao.IUserDAOTest] - before update the user=User [id=12, name=Daniel, birthday=Thu Aug 24 00:00:00 CST 2017, salary=13000.0] 2017-08-24 15:21:06,840 [main] INFO  [com.study.dao.IUserDAOTest] - after update the user=User [id=12, name=Daniel, birthday=Thu Aug 24 00:00:00 CST 2017, salary=22000.0]