spring + mybatis +maven 开发
直接奔入主题。
整个项目下载路径:http://pan.baidu.com/s/1eSrzMJS
下载后,修改数据库连接,sql语句,就可以用了。
项目构建简介如下:
1.首先创建一个maven项目(具体百度很多)。
项目架构如下(只是一个测试mybatis的项目,没有具体业务):
2.主要用到两个mybatis的jar包,如上红框。
在pom.xml文件中引入
<dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.3.0</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.2.3</version> </dependency>
3.主要讲
1)Application-context.xml文件:
如上两个红框,
1》:指定mybatis-config.xml路径(可以自定义)
2》:指定接口文件路径(根据自己文件目录)
Application-context.xml代码如下
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd"> <!-- 配置数据源--> <bean id="jdbcDataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName"> <value>oracle.jdbc.driver.OracleDriver</value> </property> <property name="url"> <value>jdbc:oracle:thin:@192.168.10.253:1521:boxinfo</value> <!--springmybaitis是我的数据库 --> </property> <property name="username"> <value>boxinfo</value> </property> <property name="password"> <value>1qaz2wsx</value> </property> </bean> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="jdbcDataSource" /> <property name="configLocation" value="classpath:mybatis-config.xml"></property> </bean> <bean id="userDao" class="org.mybatis.spring.mapper.MapperFactoryBean"> <property name="mapperInterface" value="com.roadshare.ciw.dao.UserDao"></property> <property name="sqlSessionFactory" ref="sqlSessionFactory"></property> </bean> </beans>
2)接下来讲讲mybatis-config.xml文件,内容如下:
<?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/roadshare/ciw/dao/UserDao.xml"/> --> <mapper resource="criteria.xml"/> <!-- 此处只是指定了criteria.xml文件路径,可以自定义路径--> </mappers> </configuration>
内容很少,只是写了一个xml文件的路径。
3)接下来讲讲criteria.xml文件,内容如下:
<?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.roadshare.ciw.dao.UserDao"> <!-- 对应需要实现的接口路径 --> <select id="getUser" parameterType="com.roadshare.ciw.model.User" resultType="com.roadshare.ciw.model.User"> select * from CONTAINER_GOODS_INFO t where id=#{id} and dock_code='WGQ2' </select> <select id="getUsers" parameterType="java.lang.String" resultType="java.lang.String"> select count(*) from CONTAINER_GOODS_INFO t where dock_code='WGQ2' </select> <!-- <insert id="addUser" parameterType="com.springMyBatis.system.model.User" flushCache="true"> --> <!-- INSERT INTO user (id,username,password) VALUES (#{id},#{username},#{password}) --> <!-- </insert> --> <!-- <update id="updateUser" parameterType="com.springMyBatis.system.model.User"> --> <!-- UPDATE user SET password=#{password} WHERE id=#{id} --> <!-- </update> --> <!-- <delete id="deleteUser" parameterType="int"> --> <!-- DELETE FROM user WHERE id=#{id} --> <!-- </delete> --> </mapper>
注:一个xml文件中只能有一个<mapper></mapper>标识符,不信你试试。
1》namespace指的是需要实现的接口路径(具体百度mybatis的这个关键字),不能写错;
2》id="getUser",getUser是接口里面的方法名,唯一的;
3》parameterType:是方法传入的参数类型,可以是int,String,实体,map等,不能为空(否则会报错,我尝试了下);
4》resultType:返回类型;
然后写上你的sql语句;
4)接着是我的接口UserDao.java文件,就两个方法;
package com.roadshare.ciw.dao; import com.roadshare.ciw.model.User; public interface UserDao { public User getUser(User user); public String getUsers(); }
5)User.java实体类,就一个id字段
package com.roadshare.ciw.model; public class User { private int id; public User() { } /** * 获取 id * * @return id */ public int getId() { return id; } /** * 设置 id * * @param id * id */ public void setId(int id) { this.id = id; } }
6)最后就是测试类了UserController.java,内容如下:
package com.roadshare.ciw.test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.roadshare.ciw.dao.UserDao; import com.roadshare.ciw.model.User; public class UserController { /** * @param args */ public static void main(String[] args) { ApplicationContext ctx = null; ctx = new ClassPathXmlApplicationContext("spring-configuration/applicationContext.xml"); UserDao userDao = (UserDao) ctx.getBean("userDao"); User user = new User(); int a = 1007; // 查询数据 user.setId(a); System.out.println(userDao.getUser(user).getId()); System.out.println(userDao.getUsers()); } }
整个项目就完了。
过程中我也参考了别人的博客,自己实现了一次,有些修改。