Spring中的JDBCTemplate

srcdaydayJDBCTestTest

package dayday;

import com.sun.org.apache.xalan.internal.xsltc.compiler.Template;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.namedparam.BeanPropertySqlParameterSource;
import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
import org.springframework.jdbc.core.namedparam.SqlParameterSource;


import javax.sql.DataSource;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.*;

import static javafx.scene.input.KeyCode.S;
import static javafx.scene.input.KeyCode.T;
import static org.junit.Assert.*;

/**
 * Created by I am master on 2016/12/5.
 */
public class JDBCTestTest {
    private ApplicationContext ctx=null;
    private JdbcTemplate jdbcTemplate=null;
    private UserDao userDao=null;
    private NamedParameterJdbcTemplate namedParameterJdbcTemplate=null;
    {
        ctx=new ClassPathXmlApplicationContext("beans.xml");
        jdbcTemplate=ctx.getBean("template",JdbcTemplate.class);
        userDao=ctx.getBean(UserDao.class);
        namedParameterJdbcTemplate=ctx.getBean("namedParameterJdbcTemplate",NamedParameterJdbcTemplate.class);
    }


    @Test
    public void testDataSource() throws SQLException {
        DataSource dataSource=ctx.getBean(DataSource.class);
        System.out.println(dataSource.getConnection());
    }
    @Test
    /*
    数据库的增删改查操作
     */
    public void testUpdate(){
        String sql="update bankuser set password=? where name=? ";
        jdbcTemplate.update(sql,"daydayup01","dayday");
    }
    /*
    执行批量处理
     */
    @Test
    public void testbatchUpdate(){
        String sql="insert into bankuser values(?,?,?)";
        List<Object[]> batcharrays=new ArrayList<>();
        batcharrays.add(new Object[]{"A","1","100"});
        batcharrays.add(new Object[]{"B","2","200"});
        batcharrays.add(new Object[]{"C","3","300"});
        jdbcTemplate.batchUpdate(sql,batcharrays);
    }
    /*
    *从数据库中读取一条记录，并实际返回一个对象
    *注意不是调用 queryForObject(String sql, Class<Employee> requiredType, Object... args) 方法!
     **/
    @Test
    public void testqueryForObject(){
        String sql="select password , property from bankuser where name=?";
        RowMapper<User>rowMapper=new BeanPropertyRowMapper<>(User.class);
        User user=jdbcTemplate.queryForObject(sql,rowMapper,"dayday");
        System.out.println(user);
    }
    /*
    * 查到实体类的集合
    */
    @Test
    public void testqueryForList(){
        String sql="select password , name from bankuser where property>?";
        RowMapper<User> rowMapper=new BeanPropertyRowMapper<>(User.class);
        List<User> users=jdbcTemplate.query(sql,rowMapper,200);
        System.out.println(users);

    }
    /*
    * 查询单列的值，或做统计查询
    * */
    @Test
    public void testqueryForObject1(){
        String sql="select count(name) from bankuser";
        long count=jdbcTemplate.queryForObject(sql,long.class);
        System.out.println(count);
    }
    @Test
    public void testUserDao(){
        System.out.println(userDao.get("dayday"));
    }
    /*
   * 测试JdbcTemplate的具名参数
   * 好处：若有多个参数，则不用再去对应位置，直接对应参数名
   * 坏处：较为麻烦*/
    @Test
    public void testNamedParameterJdbcTemplate(){
        String sql="insert into bankuser value(:name,:password,:property)";
        Map<String,Object> paramMap=new HashMap<>();
        paramMap.put("name","DD");
        paramMap.put("password","4");
        paramMap.put("property","400");
        namedParameterJdbcTemplate.update(sql,paramMap);
    }
    /*
    * 使用具名参数时可以使用update(String sql,SqlParameterSource paramSource)方法进行更新操作
    * 1.sql语句中的参数名和类的属性一致
    * 2.使用SqlParameterSource的BeanPropertySqlParameterSource实现类作为参数
    * */
    @Test
    public void testNamedParameterJdbcTemplate2(){
        String sql="insert into bankuser value(:name,:password,:property)";
        User user=new User();
        user.setName("E");
        user.setPassword("5");
        user.setProperty("500");
        SqlParameterSource sqlParameterSource=new BeanPropertySqlParameterSource(user);
        namedParameterJdbcTemplate.update(sql,sqlParameterSource);
    }
}

srcdaydayUserDAO.java

srcdaydayUser.java

package dayday;

/**
 * Created by I am master on 2016/12/5.
 */
public class User {
    private String name;
    private String password;
    private String property;
    public void setName(String name){
        this.name=name;
    }
    public void setPassword(String password){
        this.password=password;
    }
    public void setProperty(String property){
        this.property=property;
    }
    public String getName(){
        return name;
    }
    public String getPassword(){
        return password;
    }
    public String getProperty(){
        return property;
    }
    public String toString(){
        return "[ name="+name+" password="+password+" property="+property+"]";
    }
}

srcjdbc.property

jdbc.user=root
jdbc.password=root
jdbc.jdbcUrl=jdbc:mysql://localhost:3306/bank
jdbc.driverClass=com.mysql.jdbc.Driver

jdbc.initPoolSize=5
jdbc.maxPoolSize=10

srceans.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"
       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">
    <!--导入资源文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <!--配置c3p0数据源-->
    <bean id="datasource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="user" value="${jdbc.user}"></property>
        <property name="password" value="${jdbc.password}"></property>
        <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
        <property name="driverClass" value="${jdbc.driverClass}"></property>
        <property name="initialPoolSize" value="${jdbc.initPoolSize}"></property>
        <property name="maxPoolSize" value="${jdbc.maxPoolSize}"></property>
    </bean>
    <!--配置Spring中的jdbcTemplate-->
    <bean id="template" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="datasource"></property>
    </bean>
    <context:component-scan base-package="dayday"></context:component-scan>
    <!--配置NamedParameterJdbcTemplate，该对象可以使用具名参数，其无无参构造器，所以必须为其构造器指定参数-->
    <bean id="namedParameterJdbcTemplate" class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate">
        <constructor-arg ref="datasource"></constructor-arg>
    </bean>
</beans>