MyBatis+Spring+Maven的简单整合Demo

本文主要是示范基于Maven的MyBatis+Spring的简单使用,其中主要涉及到的是MyBatis的配置使用,另外还有部分log4j的配置使用。

项目概述

本文项目是基于MyEclipse、JDK1.7、MySQL进行开发的,主要功能是通过MyBatis实现对User这个Bean类进行增删改查操作。
先展示下整个项目的结构:
此处输入图片的描述

新建web project

如图所示(勾选Maven支持):
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一路next,勾选产生web.xml
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最后生成的项目pom.xml文件中会有很多乱七八糟的<dependency>,可以将他们删了,本小项目中暂时用不掉这些。

准备数据库表

使用mybatis数据库,没有就新建一个。

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use mybatis;

drop table if exists tb_user;
create table tb_user(
id int primary key auto_increment comment '主键',
username varchar(40) not null unique comment '用户名',
password varchar(40) not null comment '密码',
email varchar(40) comment '邮件',
age int comment '年龄',
sex char(2) not null comment '性别'
);

相关的Java处理类

  • 数据库表对应的实体类User.java
    (省略了相关的getter和setter)

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    package com.liuhao.entity;

    public class User {
    private int id;
    private String username;
    private String password;
    private String sex;
    private String email;
    private int age;

    //getter() and setter ()
    }
  • UserDao.java,可以对User进行插入、更新、删除、查找、列出所有等操作:

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    package com.liuhao.dao;
    import java.util.List;
    import com.liuhao.entity.User;

    public interface UserDao {
    public int insert(User user);
    public int update(User user);
    public int delete(String userName);
    public List<User> selectAll();
    public int countAll();
    public User findByUserName(String userName);
    }
  • UserService接口:

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    package com.liuhao.service;
    import java.util.List;
    import com.liuhao.entity.User;

    public interface UserService {
    . public int insert(User user);
    public int update(User user);
    public int delete(String userName);
    public List<User> selectAll();
    public int countAll();
    public User findByUserName(String userName);
    }
  • 实现service接口,执行dao操作:

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    package com.liuhao.service.impl;
    import java.util.List;
    import com.liuhao.dao.UserDao;
    import com.liuhao.entity.User;
    import com.liuhao.service.UserService;

    public class UserServiceImpl implements UserService {

    public UserDao userDao;
    public UserDao getUserDao() {
    return userDao;
    }
    public void setUserDao(UserDao userDao) {
    this.userDao = userDao;
    }

    @Override
    public int insert(User user) {
    return userDao.insert(user);
    }

    @Override
    public int update(User user) {
    return userDao.update(user);
    }

    @Override
    public int delete(String userName) {
    return userDao.delete(userName);
    }

    @Override
    public List<User> selectAll() {
    return userDao.selectAll();
    }

    @Override
    public int countAll() {
    return userDao.countAll();
    }

    @Override
    public User findByUserName(String userName) {
    return userDao.findByUserName(userName);
    }
    }

相关配置文件

  • Mapper文件配置/test/config/com/liuhao/dao/UserDao.xml

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    <?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.liuhao.dao.UserDao">
    <!-- 查询表中记录总数 -->
    <select id="countAll" resultType="int">
    select count(*) c from tb_user
    </select>

    <!-- 查询表中的所有用户 -->
    <select id="selectAll" resultType="com.liuhao.entity.User">
    select * from tb_user order by
    username asc
    </select>

    <!-- 向数据库中插入用户 -->
    <insert id="insert" parameterType="com.liuhao.entity.User">
    insert into
    tb_user(username,password,email,sex,age)
    values(#{username},#{password},#{email},#{sex},#{age})
    </insert>

    <!-- 更新库中的用户 -->
    <update id="update" parameterType="com.liuhao.entity.User">
    update tb_user set
    username=#{username},password=#{password},email=#{email},sex=#{sex},age=#{age}
    where username=#{username}
    </update>

    <!-- 删除用户 -->
    <delete id="delete" parameterType="String">
    delete from tb_user where username=#{username}
    </delete>

    <!-- 根据用户名查找用户 -->
    <select id="findByUserName" parameterType="String"
    resultType="com.liuhao.entity.User">
    select * from tb_user where username=#{username}
    </select>

    </mapper>
  • Mybatis应用配置文件/test/config/MyBatis-Configuration.xml:

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    <?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>
    <mappers>
    <mapper resource="com/liuhao/dao/UserDao.xml"/>
    </mappers>
    </configuration>
  • Spring配置文件,本例中我们放在/test/config/applicationContext.xml

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    <?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"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

    <!-- 配置数据源 -->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
    <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
    <property name="url" value="jdbc:mysql://localhost:3306/mybatis"></property>
    <property name="username" value="root"></property>
    <property name="password" value="123456"></property>
    </bean>
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="configLocation" value="classpath:MyBatis-Configuration.xml"></property>
    <property name="dataSource" ref="dataSource" />
    </bean>
    <bean id="userDao" class="org.mybatis.spring.mapper.MapperFactoryBean">
    <property name="mapperInterface" value="com.liuhao.dao.UserDao"></property>
    <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
    </bean>
    <bean id="userService" class="com.liuhao.service.impl.UserServiceImpl">
    <property name="userDao" ref="userDao"></property>
    </bean>
    </beans>
  • web.xml配置:

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    <?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"
    id="WebApp_ID" version="3.0">
    <display-name>test</display-name>
    <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

    <!-- 配置上下文监听 -->
    <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    </web-app>
  • 项目是基于Maven构建的,pom.xml

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    <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>test</groupId>
    <artifactId>test</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>test</name>
    <description />
    <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
    <dependencies>
    <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
    </dependency>
    <dependency>
    <groupId>commons-dbcp</groupId>
    <artifactId>commons-dbcp</artifactId>
    <version>1.2.2</version>
    </dependency>
    <!-- mybatis和spring相关 -->
    <dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.3.0</version>
    </dependency>
    <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>3.0.5.RELEASE</version>
    </dependency>
    <dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>1.2.3</version>
    </dependency>
    <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>3.0.5.RELEASE</version>
    </dependency>
    <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-dao</artifactId>
    <version>2.0.5</version>
    </dependency>
    <!-- MySQL数据库驱动 -->
    <dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.5</version>
    <type>jar</type>
    <scope>compile</scope>
    </dependency>
    <!-- JUnit测试框架 -->
    <dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
    </dependency>
    <!-- log4j日志框架 -->
    <dependency>
    <groupId>org.apache.directory.studio</groupId>
    <artifactId>org.apache.logging.log4j</artifactId>
    <version>1.2.16</version>
    </dependency>
    </dependencies>
    <build>
    <sourceDirectory>src</sourceDirectory>
    <resources>
    <resource>
    <directory>src</directory>
    <excludes>
    <exclude>**/*.java</exclude>
    </excludes>
    </resource>
    </resources>
    <plugins>
    <plugin>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>2.3.2</version>
    <configuration>
    <source>1.7</source>
    <target>1.7</target>
    </configuration>
    </plugin>
    <plugin>
    <artifactId>maven-war-plugin</artifactId>
    <version>2.2</version>
    <configuration>
    <warSourceDirectory>${basedir}/WebRoot</warSourceDirectory>
    <version>3.0</version>
    <failOnMissingWebXml>false</failOnMissingWebXml>
    </configuration>
    </plugin>
    </plugins>
    </build>
    </project>
  • 另外项目中使用了log4j进行日志采集,配置如下:

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    #log4j.rootLogger=DEBUG,CONSOLE,A1
    #log4j.rootLogger=INFO,CONSOLE,A2
    log4j.rootLogger=DEBUG,INFO,CONSOLE,A1,A2,A3

    log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
    log4j.appender.CONSOLE.Threshold=DEBUG
    log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
    log4j.appender.CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd HH\:mm\:ss} %c %-5p %m%n

    log4j.appender.A1=org.apache.log4j.DailyRollingFileAppender
    log4j.appender.A1.File=D:/logs/debug.log
    log4j.appender.A1.Threshold=INFO
    log4j.appender.A1.ImmediateFlush=true
    log4j.appender.A1.layout=org.apache.log4j.PatternLayout
    log4j.appender.A1.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %-25c -> %m%n

    log4j.appender.A2=org.apache.log4j.DailyRollingFileAppender
    log4j.appender.A2.File=D:/logs/log.log
    log4j.appender.A2.Threshold=INFO
    log4j.appender.A2.ImmediateFlush=true
    log4j.appender.A2.layout=org.apache.log4j.PatternLayout
    log4j.appender.A2.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %-25c -> %m%n

    log4j.appender.A3=org.apache.log4j.DailyRollingFileAppender
    log4j.appender.A3.File=D:/logs/error.log
    log4j.appender.A3.Threshold=ERROR
    log4j.appender.A3.ImmediateFlush=true
    log4j.appender.A3.layout=org.apache.log4j.PatternLayout
    log4j.appender.A3.layout.ConversionPattern=%d{yyyy-MM-dd HH\:mm\:ss} %-5p %-25c -> %m%n

    log4j.logger.com.springframework=DEBUG
    log4j.logger.com.ibatis=DEBUG
    log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=DEBUG
    log4j.logger.com.ibatis.common.jdbc.ScriptRunner=DEBUG
    log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=DEBUG
    log4j.logger.java.sql.Connection=DEBUG
    log4j.logger.java.sql.Statement=DEBUG
    log4j.logger.java.sql.PreparedStatement=DEBUG
    log4j.logger.java.sql.ResultSet=DEBUG

测试代码

如果按照上述代码进行部署,应该不会出问题。本人应为少加了MySQL的驱动,和同事搞了差不多一个上午。。。

  • 基于JUnit的测试代码:
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    package com.liuhao.test;

    import java.util.List;
    import org.junit.Before;
    import org.junit.Test;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    import com.liuhao.entity.User;
    import com.liuhao.service.UserService;

    public class TestMyBatis {

    ApplicationContext context = null;
    UserService userService = null;

    @Before
    public void initContext() {
    this.context = new ClassPathXmlApplicationContext(
    "applicationContext.xml");
    this.userService = (UserService) context.getBean("userService");
    }

    @Test
    public void TestInsert() {
    User user = new User();
    // username需要是唯一的
    user.setUsername("刘哈哈");
    user.setPassword("passtest");
    user.setEmail("liuhao2995@163.com");
    user.setSex("男");
    user.setAge(23);
    userService.insert(user);
    }

    @Test
    public void TestCountAll() {
    System.out.println("数据库中的记录条数:" + userService.countAll());
    }

    @Test
    public void TestSelectAll() {
    List<User> list = userService.selectAll();
    for (int i = 0; i < list.size(); i++) {
    User user = list.get(i);
    System.out.println("用户名:" + user.getUsername() + "\t密码:"
    + user.getPassword() + "\t邮箱:" + user.getEmail());
    }
    }

    @Test
    public void TestFindByName() {
    User user = userService.findByUserName("刘哈哈");
    System.out.println("用户名:" + user.getUsername() + "\t密码:"
    + user.getPassword() + "\t邮箱:" + user.getEmail());

    }

    @Test
    public void TestUpdate() {
    User user = new User();
    user.setUsername("刘哈哈");
    user.setPassword("xxxxxxxx");
    user.setEmail("xxxxxx@163xxx");
    user.setSex("男");
    user.setAge(23);
    userService.update(user);
    }

    @Test
    public void TestDelete() {
    userService.delete("刘哈哈");
    }
    }

源码下载:http://download.csdn.net/detail/bruce_6/8876565
参考:http://www.cnblogs.com/dennisit/archive/2013/04/10/3012972.html

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