后端开发基础-Spring与MyBatis集成-002——基础概念

SqlSessionTemplate使用：

1. 在使用Mybatis与Spring集成的时候我们会用到SqlSessionTemplate 这个类。
2. 具体如何使用以及如何在SpringMVC中使用呢？

通过简单案例演示如下：

案例演示：

工程案例目录结构

数据库表结构：

 

导入需要的jar 或配置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>com.study</groupId>
  <artifactId>springcase-day08</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>

    <dependencies>
  	<dependency>
  		<groupId>org.mybatis</groupId>
  		<artifactId>mybatis</artifactId>
  		<version>3.3.0</version>
  </dependency>
  	<dependency>
  		<groupId>com.oracle</groupId>
  		<artifactId>ojdbc14</artifactId>
  		<version>10.2.0.4.0</version>
  	</dependency>
  	<dependency>
  		<groupId>junit</groupId>
  		<artifactId>junit</artifactId>
  		<version>4.12</version>
  	</dependency>
  	<dependency>
  		<groupId>org.springframework</groupId>
  		<artifactId>spring-webmvc</artifactId>
  		<version>3.2.8.RELEASE</version>
  	</dependency>
  	<dependency>
  		<groupId>org.mybatis</groupId>
  		<artifactId>mybatis-spring</artifactId>
  		<version>1.2.3</version>
  	</dependency>
  	<dependency>
  		<groupId>commons-dbcp</groupId>
  		<artifactId>commons-dbcp</artifactId>
  		<version>1.4</version>
  	</dependency>
  	<dependency>
  		<groupId>org.springframework</groupId>
  		<artifactId>spring-jdbc</artifactId>
  		<version>3.2.8.RELEASE</version>
  	</dependency>
  </dependencies>
</project>

Cost.java

package com.dk.entity;

import java.io.Serializable;
import java.sql.Date;

public class Cost implements Serializable{

	private Integer cost_id;
	private String  name;
	private Long  base_duration;
	private Double base_cost;
	private Double uint_cost;
	private String status;
	private String descr;
	private Date creatime;
	private Date startime;
	private String cost_type;

	public Integer getCost_id() {
		return cost_id;
	}
	public void setCost_id(Integer cost_id) {
		this.cost_id = cost_id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Long getBase_duration() {
		return base_duration;
	}
	public void setBase_duration(Long base_duration) {
		this.base_duration = base_duration;
	}
	public Double getBase_cost() {
		return base_cost;
	}
	public void setBase_cost(Double base_cost) {
		this.base_cost = base_cost;
	}
	public Double getUint_cost() {
		return uint_cost;
	}
	public void setUint_cost(Double uint_cost) {
		this.uint_cost = uint_cost;
	}
	public String getStatus() {
		return status;
	}
	public void setStatus(String status) {
		this.status = status;
	}
	public String getDescr() {
		return descr;
	}
	public void setDescr(String descr) {
		this.descr = descr;
	}
	public Date getCreatime() {
		return creatime;
	}
	public void setCreatime(Date creatime) {
		this.creatime = creatime;
	}
	public Date getStartime() {
		return startime;
	}
	public void setStartime(Date startime) {
		this.startime = startime;
	}
	public String getCost_type() {
		return cost_type;
	}
	public void setCost_type(String cost_type) {
		this.cost_type = cost_type;
	}

}

CostDAO.java

package com.dk.dao;

import java.util.List;

import com.dk.entity.Cost;

public interface CostDAO {
	public List<Cost> findAll();

}

CostDAOImpl.java

package com.dk.dao.impl;

import java.util.List;

import javax.annotation.Resource;

import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.stereotype.Repository;

import com.dk.dao.CostDAO;
import com.dk.entity.Cost;
/**
 * 在springMVC中使用方式
 * @author Cher_du
 *
 */
@Repository("costDAOImpl")
public class CostDAOImpl implements CostDAO{

	@Resource(name="sqlSession")
	private SqlSessionTemplate template;;

	public List<Cost> findAll() {
		return template.selectList("findAll");
	}
}

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:context="http://www.springframework.org/schema/context"
	xmlns:jdbc="http://www.springframework.org/schema/jdbc"
	xmlns:jee="http://www.springframework.org/schema/jee"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:util="http://www.springframework.org/schema/util"
	xmlns:jpa="http://www.springframework.org/schema/data/jpa"
	xsi:schemaLocation="
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
		http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd
		http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
		http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
		http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
		http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd">

		 <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
          	<!-- <property name="sqlSessionFactory" ref="ssf"></property> -->
          	<constructor-arg index="0" ref="ssf"></constructor-arg>
   		 </bean>
		<!-- 创建DataSource对象 -->
		<bean id="dbcp" class="org.apache.commons.dbcp.BasicDataSource">
			<property name="username" value="learn"></property>
			<property name="password" value="learn"></property>
			<property name="url" value="jdbc:oracle:thin:@localhost:1521:orcl"></property>
			<property name="driverClassName" value="oracle.jdbc.OracleDriver"></property>
		</bean>

		<!-- 定义SqlSessionFactoryBean ，
		创建SqlSessionFactory对象 -->
		<bean id="ssf"
		class="org.mybatis.spring.SqlSessionFactoryBean">
			<!-- 数据库连接参数 -->
			<property name="dataSource" ref="dbcp"></property>
			<!-- SQL定义文件参数 -->
			<property name="mapperLocations" value="classpath:mapper/*.xml">
			</property>
		</bean>

		<!-- 根据Mapper接口生成实现对象，
		默认接口名首字母小写做id属性值 -->
		<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
			<!-- 指定扫描Mapper接口的路径 -->
			<property name="basePackage" value="com.dk.dao"></property>
			<property name="sqlSessionFactory" ref="ssf"></property>
		</bean>

<!-- 	<bean id="costDao"
		class="org.mybatis.spring.mapper.MapperFactoryBean">
			<property name="mapperInterface" value="com.dk.dao.CostDAO"></property>
			<property name="sqlSessionFactory" ref="ssf"></property>
		</bean>
 -->

</beans>

CostMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN"
 "http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd">
<mapper namespace="com.dk.dao.CostDAO">
	<select id="findAll" resultType="com.dk.entity.Cost">
		select * from cost
	</select>
</mapper>

TestCostDAO.java

package test;


import java.util.List;

import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.junit.Test;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.dk.dao.CostDAO;
import com.dk.entity.Cost;

public class TestCostDAO {

	@Test
	public void test(){
		String conf = "applicationContext.xml";
		ApplicationContext ac = new ClassPathXmlApplicationContext(conf);
		System.out.println(ac);
		SqlSessionTemplate T= ac.getBean("sqlSession", SqlSessionTemplate.class);
		System.out.println(T);
		List<Cost> list= T.selectList("findAll");
		for(Cost cost:list){
			System.out.println(cost.getName());
		}
	}


}

运行test进行测试控制台输出: