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JdbcTemplate概述和测试
2022-08-04 21:01:00 【执久呀】
目录
JdbcTemplate概述
他是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HivernateTenplate,操作nosql数据库的RedisTemplate,操作消息队列的JmsTemplate等
JdbcTemplate开发步骤
- ①导入spring-jdbc和spring-tx坐标
- ②创建数据库表和实体
- ③创建JdbcTemplate对象
- ④执行数据库操作
数据库中account表
pom.xml中
<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>
测试java中实体类中
package test;
import com.mchange.v2.c3p0.ComboPooledDataSource;
import org.junit.Test;
import org.springframework.jdbc.core.JdbcTemplate;
import java.beans.PropertyVetoException;
public class JdbcTemplateTest {
@Test
//测试JdbcTemplate开发步骤
public void test1() throws PropertyVetoException {
//创建数据源对象
ComboPooledDataSource dataSource=new ComboPooledDataSource();
dataSource.setDriverClass("com.mysql.jdbc.Driver");
//位置为本地,3306端口,test数据库
dataSource.setJdbcUrl("jdbc:mysql://localhost:3306/test");
//用户名
dataSource.setUser("root");
//用户密码
dataSource.setPassword("123456");
JdbcTemplate jdbcTemplate=new JdbcTemplate();
//设置数据源对象,知道数据库在哪里
jdbcTemplate.setDataSource(dataSource);
//执行操作
int row = jdbcTemplate.update("insert into account value(?,?)", "tom", 5000);
System.out.println(row);
}
}
domain包下的account类下
package domain;
public class Account {
private String name;
private double money;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getMoney() {
return money;
}
public void setMoney(double money) {
this.money = money;
}
@Override
public String toString() {
return "Account{" +
"name='" + name + '\'' +
", money=" + money +
'}';
}
}
运行结果:
数据库中的test数据库,account表
Spring产生JdbcTemplate对象
测试插入
仔细看,这些都是参数注入(用了setXxx。。),我们可以将JdbcTemplate的创建权交给Spring,将数据源DataSource的创建权也交给Spring,在Spring容器内部将数据源DateSource注入到JdbcTemplate模版对象中,配置如下:
在test测试包下创建一系列
在applicationContext1.xml下
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
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.xsd">
<!--数据源对象-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"/>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/test"/>
<property name="user" value="root"/>
<property name="password" value="123456"/>
</bean>
<!-- jdbc模版对象-->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"/>
</bean>
</beans>
pom.xml中
<?xml version="1.0" encoding="UTF-8"?>
<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>org.example</groupId>
<artifactId>javaMaven02</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.32</version>
</dependency>
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.10</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.0.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.0.5.RELEASE</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>5.0.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.0.5.RELEASE</version>
</dependency>
<!-- 导入json相关依赖 -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.9.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.9.0</version>
</dependency>
<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>
</dependencies>
</project>
JdbcTemplateTest类下
public class JdbcTemplateTest {
@Test
//测试Spring产生jdbcTemplate对象
public void test2() throws PropertyVetoException {
ApplicationContext app=new ClassPathXmlApplicationContext("applicationContext1.xml");
JdbcTemplate jdbcTemplate=app.getBean(JdbcTemplate.class);
int row = jdbcTemplate.update("insert into account value(?,?)", "KC", 50000);
System.out.println(row);
}
}
运行结果:
数据库中的变化
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