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。
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）
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：
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：
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：
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：
<?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:
<?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：
<?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：
<?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：
<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：
#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：
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");
}
}
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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
