spring-jdbcTemplet 连接数据源(基础)

1,我的数据库

       

2.我的java代码段

entity实体类

  

package cn.happy.spring05jdbctemplate.entity;

/**
 * Created by Happy on 2017-08-02.
 */
public class Book {
    private Integer bookid;
    private String bookname;
    private Integer bookprice;

    public Integer getBookid() {
        return bookid;
    }

    public void setBookid(Integer bookid) {
        this.bookid = bookid;
    }

    public String getBookname() {
        return bookname;
    }

    public void setBookname(String bookname) {
        this.bookname = bookname;
    }

    public Integer getBookprice() {
        return bookprice;
    }

    public void setBookprice(Integer bookprice) {
        this.bookprice = bookprice;
    }
}

  我的dao层 IBookDAO

package cn.happy.spring05jdbctemplate.dao;

import cn.happy.spring05jdbctemplate.entity.Book;
import java.util.List;

/**
 * Created by Happy on 2017-08-02.
 */
public interface IBookDAO {
    //01.查询素有图书
    public List<Book> findAll();
}

  我的dao层 IBookDAO的实现类

package cn.happy.spring05jdbctemplate.dao.impl;


import cn.happy.spring05jdbctemplate.dao.IBookDAO;
import cn.happy.spring05jdbctemplate.entity.Book;
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;
/**
 * Created by Happy on 2017-10-17
 * dao层实现类:BookDAOImpl 先继承JdbcDaoSupport 在实现dao层接口
 */
public void BookDAOImpl extends JdbcDaoSupport implements IBookDAO {
  public List<Book> findAll() {
        //需要植入 jdbctemplet
    String sql="select * from book";
    //匿名内部类
     List<Book> list=this.getJdbcTemplate().query(sql, new RowMapper<Book>() {
         /**
             * @param rs:单条记录读取器
             * @param i  索引
             * @return
             * @throws SQLException
             */
            public Book mapRow(ResultSet rs, int i) throws SQLException {
                Book book=new Book();
                book.setBookid(rs.getInt("bookid"));
                book.setBookname(rs.getString("bookname"));
                book.setBookprice(rs.getInt("bookprice"));
                return book;
            }
        });
        return list;
}
}

  我的service 接口

package cn.happy.spring05jdbctemplate.service;



import cn.happy.spring05jdbctemplate.entity.Book;

import java.util.List;

/**
 * Created by Happy on 2017-08-02.
 */
public interface IBookService {
    //01.查询素有图书
    public List<Book> findAll();
}

  我的service的实现类

package cn.happy.spring05jdbctemplate.service.impl;



import cn.happy.spring05jdbctemplate.dao.IBookDAO;
import cn.happy.spring05jdbctemplate.entity.Book;
import cn.happy.spring05jdbctemplate.service.IBookService;

import java.util.List;

/**
 * Created by Happy on 2017-08-02.
 */
public class BookServiceImpl implements IBookService {

    //植入dao
    private IBookDAO dao;

    public List<Book> findAll() {
        return dao.findAll();
    }

    public IBookDAO getDao() {
        return dao;
    }

    public void setDao(IBookDAO dao) {
        this.dao = dao;
    }
}

  我的大配置applicationContextSpring05jdbcTemplet.xml的配置

<?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/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd

">

<!--spring的内置配置--> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="url" value="jdbc:mysql:///t14"></property> <property name="driverClassName" value="com.mysql.jdbc.Driver"></property> <property name="username" value="root"></property> <property name="password" value=""></property> </bean>
<!--jdbcTemplet-->
<bean id="jdbcTomplet" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"/>
</bean>
<!--dao-->
<bean id="dao" class="cn.happy.spring05jdbctemplate.dao.impl.BookDAOImpl">
<property name="jdbcTemplate" ref="jdbcTomplet"/>
</bean>
<!--service-->
<bean id="service" class="cn.happy.spring05jdbctemplate.service.impl.BookServiceImpl">
<property name="dao" ref="dao"/>
</bean>
</beans>

  我的测试类

package cn.happy.jdbcteplet;

import cn.happy.spring05jdbctemplate.entity.Book;
import cn.happy.spring05jdbctemplate.service.IBookService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.List;

public class Test {


    // aspectjxml
    @org.junit.Test
    public void test04(){
        ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContextSpring05jdbcTemplet.xml");
        IBookService service = (IBookService) ctx.getBean("service");
        List<Book> list = service.findAll();
        for (Book book:list ) {
            System.out.println(book.getBookname());
        }
    }
}

  以上写的是spring内置的Datasource。

      一下还有其他的方法可以在大配置上可以连接数据源。

你只要把applicationContextSpring05jdbcTemplet.xml的配置文件中 的

 <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
class="org.springframework.jdbc.datasource.DriverManagerDataSource"里头的class属性改一下好就行。
!--c3p0的配置-->
  <!-- <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
      <property name="jdbcUrl" value="jdbc:mysql:///t14"></property>
      <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
      <property name="user" value="root"></property>
      <property name="password" value=""></property>
   </bean>-->
   <!--阿里巴巴的配置-->
  <!-- <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
      <property name="url" value="jdbc:mysql:///t14"></property>
      <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
      <property name="username" value="root"></property>
      <property name="password" value=""></property>
   </bean>-->
   <!--dbcp的配置-->
    <!--<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
       <property name="url" value="jdbc:mysql:///t14"></property>
       <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
       <property name="username" value="root"></property>
       <property name="password" value=""></property>
    </bean>-->

  2.还有使用jdbc.properties文件连接数据库   在把两个配置文件连接起来就行。

      如下代码:

我的jdbc.properties代码:

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///t14
jdbc.username=root
jdbc.password=

  

       (1)使用<!--使用contextual:property-placeholder-->

   记住 在头文件里头不要忘了加入

xmlns:context="http://www.springframework.org/schema/context"和
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
由于时间原因没有详细了解,如果有时间 你们可以验证一下。
 <!--使用contextual:property-placeholder-->
 <context:property-placeholder location="classpath:jdbc.properties"/>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
      <property name="url" value="${jdbc.url}"></property>
      <property name="driverClassName" value="${jdbc.driverClassName}"></property>
      <property name="username" value="${jdbc.username}"></property>
      <property name="password" value="${jdbc.password}"></property>
   </bean>

  使用bean节点连接jdbc.properties

<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
      <property name="location" value="classpath:jdbc.properties"/>
   </bean>
   <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
      <property name="url" value="${jdbc.url}"></property>
      <property name="driverClassName" value="${jdbc.driverClassName}"></property>
      <property name="username" value="${jdbc.username}"></property>
      <property name="password" value="${jdbc.password}"></property>
   </bean>
   <!--jdbcTemplet-->
   <bean id="jdbcTomplet" class="org.springframework.jdbc.core.JdbcTemplate">
      <property name="dataSource" ref="dataSource"/>
   </bean>
   <!--dao-->
   <bean id="dao" class="cn.happy.spring05jdbctemplate.dao.impl.BookDAOImpl">
      <property name="jdbcTemplate" ref="jdbcTomplet"/>
   </bean>
   <!--service-->
   <bean id="service" class="cn.happy.spring05jdbctemplate.service.impl.BookServiceImpl">
      <property name="dao" ref="dao"/>
   </bean>

  我的测试结果:

 

posted on 2017-10-17 18:17  蒙古码农  阅读(1322)  评论(0编辑  收藏  举报