念安——JDBC连接测试

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>