一、需要的文件及其所属文件夹
在写项目时，系统的逻辑层次非常关键
调用层级
数据库
1.创建Test类用来测试，含有添加函数
package com.test;
import com.dao.IAccountDao;
import com.entity.Account;
import org.junit.Test;
import javax.annotation.Resource;
public class SpringJdbcAdd extends BaseTest{
//注入
@Resource
private IAccountDao accountDao;
@Test
public void testAddAccount(){
//账户模块添加操作测试类
//用的是AccountDaoImpl的，addAccount方法
//准备要添加的数据
Account account = new Account("账户3","工商银行",200.0,"奖金",1);
//调用对象方法中的添加方法，返回受影响的行数
int row = accountDao.addAccount(account);
System.out.println("添加成功，受影响的行数"+row);
}
}
其中，BaseTest类中有集成环境
package com.test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)//将测试环境运行在Spring环境中
@ContextConfiguration(locations = {"classpath:spring.xml"}) // 设置要加载的配置文件
public class BaseTest {
}
2.先调用实体类中constructor，生成对象：
SpringJdbcAdd
3.再调用dao层接口的方法返回
SpringJdbcAdd
dao层
4.在生成对象之后，需要用SQL语句将其添加进数据库。SQL语句写在AccountDaoImpl中，通过entity实体类得到对象的属性，通过SQL添加进数据库：
package com.dao.impl;
import com.dao.IAccountDao;
import com.entity.Account;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;
import javax.annotation.Resource;
import java.util.List;
//Dao交给IOC处理
//账户模块接口的实现类
@Repository
public class AccountDaoImpl implements IAccountDao {
@Resource
//JDBC模板,注入JdbcTemplate模板类
private JdbcTemplate jdbcTemplate;
/**添加账户记录
* 返回受影响的行数
* @param account
* @return
*/
@Override
public int addAccount(Account account) {
//定义SQL语句
String sql = "insert into tb_account (account_name,"+
"account_type,money,remark,create_time,update_time,user_id) values(?,?,?,?,now(),now(),?)";
//设置参数
Object[] objs = {account.getAccountName(),account.getAccountType(),
account.getMoney(),account.getRemark(),account.getUserId()};
int row = jdbcTemplate.update(sql,objs);
return row;
}
@Override
public int addAccountHashKey(Account account) {
return 0;
}
@Override
public int addAccountBatch(List<Account> accounts) {
return 0;
}
@Override
public int queryAccountCount(int userId) {
return 0;
}
@Override
public Account queryAccountById(int accountId) {
return null;
}
@Override
public List<Account> queryAccountByParams(Integer userId, String accountNames, String accountType, String createTime) {
return null;
}
@Override
public int updateAccount(Account account) {
return 0;
}
@Override
public int updateAccountBaatch(List<Account> accounts) {
return 0;
}
@Override
public int deleteAccount(int account) {
return 0;
}
@Override
public int deleteAccountBatch(Integer[] ids) {
return 0;
}
}
调用关系
test->dao的implement，该类实现了IAccountDao接口->entity实体类
附录一：pom.xml文件：
<?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>test_02</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<!-- 配置相关的依赖坐标-->
<!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.2.12.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.2.12.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.3.6</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.12.RELEASE</version>
</dependency>
<!--spring事务-->
<!-- https://mvnrepository.com/artifact/org.springframework/spring-tx -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>5.2.12.RELEASE</version>
</dependency>
<!-- AOP-->
<dependency>
<groupId>aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.5.4</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.22</version>
</dependency>
<!-- C3P0连接池-->
<!-- https://mvnrepository.com/artifact/com.mchange/c3p0 -->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.2</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13.1</version>
<scope>test</scope>
</dependency>
</dependencies>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
</project>
附录二：jdbc连接的properties：
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.user=root
jdbc.password=123456
jdbc.url=jdbc:mysql://localhost:3306/spring_database?useUnicode=true&\
serverTimezone=Asia/Shanghai&characterEncoding=utf8&autoReconnect=true&useSSL=false&allowMultiQueries=true
附录三：spring的xml文件配置
<?xml version="1.0" encoding="UTF-8"?>
<!--key_value要一一对应-->
<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"
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">
<!-- org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException:
Line 1 in XML document from class path resource [spring.xml] is invalid; nested exception is org.xml.sax.SAXParseException;
systemId: http://www.springframework.org/schema/mvc/; lineNumber: 1; columnNumber: 55; 在 publicId 和 systemId 之间需要有空格。-->
<!-- 开启自动化扫描-->
<context:component-scan base-package = "com" />
<!-- 加载propeties配置，可以读取jdbc.propeerties配置文件中的数据-->
<context:property-placeholder location="jdbc.properties" />
<!-- 配置c3p0数据源-->
<bean id = "adtaSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" >
<!-- 通过property标签配置对应的值-->
<!-- value属性值对应properties配置文件中的值-->
<property name="driverClass" value="${jdbc.driver}" />
<property name="jdbcUrl" value="${jdbc.url}" />
<property name="user" value="${jdbc.user}" />
<property name="password" value="${jdbc.password}" />
</bean>
<!-- 配置jdbc模板对象，并注入数据源-->
<bean id = "jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="adtaSource" />
</bean>
</beans>
