JdbcTemplate基本使用
01-JdbcTemplate基本使用-概述(了解)
JdbcTemplate是spring框架中提供的一个对象，是对原始繁琐的Jdbc API对象的简单封装。spring框架为我们提供了很多的操作模板类。例如：操作关系型数据的JdbcTemplate和HibernateTemplate，操作nosql数据库的RedisTemplate，操作消息队列的JmsTemplate等等。
更新操作：
jdbcTemplate.update (sql,params)
查询操作：
jdbcTemplate.query (sql,Mapper,params)jdbcTemplate.queryForObject(sql,Mapper,params)
JdbcTemplate基本使用
①导入spring-jdbc和spring-tx坐标
<dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>5.0.5.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-tx</artifactId><version>5.0.5.RELEASE</version></dependency>
②创建数据库表和实体
③创建JdbcTemplate对象
<?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:aop="http://www.springframework.org/schema/aop"xmlns:p="http://www.springframework.org/schema/p"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
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
"><context:property-placeholder location="jdbc.properties"/><bean id="jdbc" class="org.springframework.jdbc.core.JdbcTemplate"><property name="dataSource" ref="datasource"/></bean><bean id="datasource" class="com.mchange.v2.c3p0.ComboPooledDataSource"><property name="driverClass" value="${jdbc.driver}"/><property name="jdbcUrl" value="${jdbc.url}"/><property name="user" value="${jdbc.username}"/><property name="password" value="${jdbc.password}"/></bean></beans>
④执行数据库操作
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class SpringJunitTest {@AutowiredJdbcTemplate jdbcTemplate;@Testpublic void testDelte(){jdbcTemplate.update("delete from student where sno='12'");}public void testOneQuery(){Long student=jdbcTemplate.queryForObject("select count(*) from student",Long.class);System.out.println(student);}public void testQuery(){List<Student> list=jdbcTemplate.query("select * from student",new BeanPropertyRowMapper<Student>(Student.class));System.out.println(list);}public void testUpdate(){jdbcTemplate.update("update student set name='aa' where sno='12'");}public void testInsert(){jdbcTemplate.update("insert into student values (?,?)","12","kk");}}
)
