目标:完成对数据库中某一行的更新操作
步骤一:在IDEA建立Maven project,并配置pom.xml,配置完成后IDEA将自动导入项目所需的jar包
pom.xml:
<?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>com.germa</groupId>
<artifactId>SpringDemo</artifactId>
<version>1.0</version>
<name>SpringDemo</name>
<dependencies>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>${commons-dbcp.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>${aspectjweaver.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>6.8.7</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.7.2</version>
<configuration>
<forkMode>once</forkMode>
<threadCount>10</threadCount>
<argLine>-Dfile.encoding=UTF-8</argLine>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<mysql.version>5.1.29</mysql.version>
<servlet.version>3.0-alpha-1</servlet.version>
<commons-dbcp.version>1.4</commons-dbcp.version>
<spring.version>4.2.2.RELEASE</spring.version>
<aspectjweaver.version>1.6.8</aspectjweaver.version>
<slf4j.version>1.7.5</slf4j.version>
</properties>
</project>
步骤二:在classpath中添加jdbc.propertities以及spring-demo.xml配置文件
jdbc.properties:
#Mysql
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc\:mysql\://localhost\:3306/sampledb
jdbc.username=root
jdbc.password=123
spring-demo.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:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
<context:component-scan base-package="com.germa.test"/>
<context:property-placeholder
location="classpath:jdbc.properties"/>
<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close"
p:driverClassName="${jdbc.driverClassName}"
p:url="${jdbc.url}"
p:username="${jdbc.username}"
p:password="${jdbc.password}"/>
<bean id="jdbcTemplate"
class="org.springframework.jdbc.core.JdbcTemplate"
p:dataSource-ref="dataSource"/>
</beans>
步骤三:编写com.germa.test包下的测试程序
SpringDemo.java
package com.germa.test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Component;
@Component
public class SpringDemo {
private JdbcTemplate jdbcTemplate=new JdbcTemplate();
@Autowired
//当使用到此bean时容器会将其自动装配
public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
this.jdbcTemplate = jdbcTemplate;
}
public void addCredits(){
String sql="update t_user set credits=credits+5 where user_name='germa'";
jdbcTemplate.update(sql);
}
public static void main(String[] args){
//获得对Spring容器的引用(加载resource里的配置文件)
ApplicationContext ctx=new ClassPathXmlApplicationContext("classpath:spring-demo.xml");
//从spring容器中获得SpringDemo对象(如配置文件中未指明bean的id,则默认bean id为前一个字母小写的类名)
SpringDemo springDemo=(SpringDemo)ctx.getBean("springDemo");
//调用该Bean的addCredits方法
springDemo.addCredits();
}
}