package cn.bdqn.dao.impl;import cn.bdqn.Account;
import cn.bdqn.dao.AccountDao;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.support.JdbcDaoSupport;import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;public class AccountDaoImpl extends JdbcDaoSupport implements AccountDao {private JdbcTemplate jdbcTemplate;public List<Account> selectAccount() {String sql="select * from Account";          注意：我们查询的时候，第二个参数是RowMapper类型的，这里通过匿名类部类实现List<Account> list = getJdbcTemplate().query(sql, new RowMapper<Account>() {public Account mapRow(ResultSet resultSet, int i) throws SQLException {Account account=new Account();account.setAid(resultSet.getInt("aid"));account.setAname(resultSet.getString("aname"));account.setBalance(resultSet.getDouble("balance"));return account;}});return list;}
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:context="http://www.springframework.org/schema/context"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="
        http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd"><!--01.加载jdbc.properties文件 的两种方式--><!--<context:property-placeholder location="classpath:jdbc.properties"/>--><bean class="org.springframework.context.support.PropertySourcesPlaceholderConfigurer"><property name="location" value="classpath:jdbc.properties"/></bean><!-- 02.配置数据源  001.使用spring默认的数据源<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"><property name="url" value="${jdbc.jdbcUrl}"/><property name="driverClassName" value="${jdbc.driverClass}"/><property name="username" value="${jdbc.userName}"/><property name="password" value="${jdbc.password}"/></bean>--><!--002.dbcp数据源-->  这种配置比较常用<!--<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"><property name="url" value="${jdbc.jdbcUrl}"/><property name="driverClassName" value="${jdbc.driverClass}"/><property name="username" value="${jdbc.userName}"/><property name="password" value="${jdbc.password}"/></bean>--><!--003  c3p0数据源--><!-- <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"><property name="jdbcUrl" value="${jdbc.jdbcUrl}"/><property name="driverClass" value="${jdbc.driverClass}"/><property name="user" value="${jdbc.userName}"/><property name="password" value="${jdbc.password}"/>
</bean>--><!--004   使用阿里巴巴de数据源 --><bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"><property name="url" value="${jdbc.jdbcUrl}"/><property name="driverClassName" value="${jdbc.driverClass}"/><property name="username" value="${jdbc.userName}"/><property name="password" value="${jdbc.password}"/></bean><!--03.配置dao--><bean id="accountDao" class="cn.bdqn.dao.impl.AccountDaoImpl"><property name="dataSource" ref="dataSource"/></bean><!--04.配置service--><bean id="impl" class="cn.bdqn.service.impl"><property name="accountDao" ref="accountDao"/></bean></beans>

jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.jdbcUrl=jdbc:mysql:///mybatis
jdbc.userName=root
jdbc.password=000

<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"><parent><artifactId>U3</artifactId><groupId>cn.bdqn</groupId><version>1.0-SNAPSHOT</version></parent><modelVersion>4.0.0</modelVersion><artifactId>springJDBCt14</artifactId><packaging>jar</packaging><name>springJDBCt14</name><url>http://maven.apache.org</url><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><!--spring对应的版本号--><spring.version>4.2.1.RELEASE</spring.version></properties><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.0</version><scope>test</scope></dependency><!--引入需要的spring 核心jar--><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-expression</artifactId><version>${spring.version}</version></dependency><dependency><groupId>commons-logging</groupId><artifactId>commons-logging</artifactId><version>1.1.1</version></dependency><!--引入mysql的驱动包--><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.26</version></dependency><!--配置jdbc需要的数据源--><dependency><groupId>commons-pool</groupId><artifactId>commons-pool</artifactId><version>1.6</version></dependency><dependency><groupId>commons-dbcp</groupId><artifactId>commons-dbcp</artifactId><version>1.4</version></dependency><dependency><groupId>c3p0</groupId><artifactId>c3p0</artifactId><version>0.9.1.2</version></dependency><!--SpringJDBC需要的jar--><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>${spring.version}</version></dependency><!--alibaba datasource--><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.0.18</version></dependency></dependencies>
</project>