Spring连接数据库整合-实例

 package cn.com.service;

 import java.util.List;

 import cn.com.bean.PersonBean;

 public interface PersonService {
     //保存
     public void save(PersonBean person);
     //更新
     public void update(PersonBean person);
     //获取person
     public PersonBean getPerson(int id);

     public List<PersonBean> getPersonBean();
     //删除记录
     public void delete(int personid);
 }

Person Bean类：

 package cn.com.bean;

 public class PersonBean {
     private int id;
     private String name;

     public PersonBean(String name) {
         this.name=name;
     }
     public int getId() {
         return id;
     }
     public void setId(int id) {
         this.id = id;
     }
     public String getName() {
         return name;
     }
     public void setName(String name) {
         this.name = name;
     }

 }

接口实现：

 package cn.com.service.impl;

 import java.util.List;

 import javax.sql.DataSource;

 import org.springframework.jdbc.core.JdbcTemplate;

 import cn.com.bean.PersonBean;
 import cn.com.service.PersonService;

 public class PersonServiceImpl implements PersonService {
     private JdbcTemplate jdbcTemplate;
     public void setDataSource(DataSource dataSource) {
         this.jdbcTemplate = new JdbcTemplate(dataSource);
     }

     @Override
     public void save(PersonBean person) {
         // TODO Auto-generated method stub
         jdbcTemplate.update("insert into person(name) values(?)", new Object[]{person.getName()},
                 new int[]{java.sql.Types.VARCHAR});
     }

     @Override
     public void update(PersonBean person) {
         // TODO Auto-generated method stub
         jdbcTemplate.update("update person set name=? where id=?", new Object[]{person.getName(),person.getId()},
                 new int[]{java.sql.Types.VARCHAR,java.sql.Types.INTEGER});
     }

     @Override
     public PersonBean getPerson(int id) {
         // TODO Auto-generated method stub
         return (PersonBean)jdbcTemplate.queryForObject("select * from person where id=?", new Object[]{id},
                 new int[]{java.sql.Types.INTEGER},new PersonRowMapper() );
     }

     @SuppressWarnings("unchecked")
     @Override
     public List<PersonBean> getPersonBean() {
         // TODO Auto-generated method stub
         return (List<PersonBean>)jdbcTemplate.query("select * from person",
                 new PersonRowMapper() );
     }

     @Override
     public void delete(int personid) {
         // TODO Auto-generated method stub
         jdbcTemplate.update("delete from person  where id=?", new Object[]{personid},
                 new int[]{java.sql.Types.INTEGER});
     }

 }

RowMapper:

 package cn.com.service.impl;

 import java.sql.ResultSet;
 import java.sql.SQLException;

 import org.springframework.jdbc.core.RowMapper;

 import cn.com.bean.PersonBean;

 public class PersonRowMapper implements RowMapper {

     @Override
     public Object mapRow(ResultSet rs, int index) throws SQLException {
         // TODO Auto-generated method stub
         PersonBean person =new PersonBean(rs.getString("name"));
         person.setId(rs.getInt("id"));
         return person;
     }

 }

beans.xml配置

 <?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"
        xmlns:aop="http://www.springframework.org/schema/aop"
        xmlns:tx="http://www.springframework.org/schema/tx"
        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-2.5.xsd
             http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
            ">
              <!-- <context:property-placeholder location="classpath:jdbc.properties"/> -->
              <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
                 <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
                 <property name="url" value="jdbc:mysql://localhost:3306/wy"/>
                 <property name="username" value="root"/>
                 <!-- property池启动时的初始值  -->
                  <property  name="password" value="123"/>
                  <!-- 连接name="initialSize" value="${initialSize}"/>-->
                  <property name="initialSize" value="1"/>
                  <!-- 连接池的最大值 -->
                  <property name="maxActive" value="500"/>
                  <!-- 最大空闲值.当经过一个高峰时间后，连接池可以慢慢将已经用不到的连接慢慢释放一部分，一直减少到maxIdle为止 -->
                  <property name="maxIdle" value="2"/>
                  <!--  最小空闲值.当空闲的连接数少于阀值时，连接池就会预申请去一些连接，以免洪峰来时来不及申请 -->
                  <property name="minIdle" value="1"/>
              </bean>
              <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
                 <property name="dataSource" ref="dataSource"/>
              </bean>
              <tx:annotation-driven transaction-manager="txManager"/>
              <bean id="personService" class="cn.com.service.impl.PersonServiceImpl">
                 <property name="dataSource" ref="dataSource"></property>
              </bean>
 </beans>

测试类：

 package Junit.test;

 import static org.junit.Assert.*;

 import org.junit.BeforeClass;
 import org.junit.Test;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.support.ClassPathXmlApplicationContext;

 import cn.com.bean.PersonBean;
 import cn.com.service.PersonService;

 public class PersonTest2 {
  private static  PersonService personService;
  @BeforeClass
  public static void setUpBeforeClass() throws Exception {
   ApplicationContext act=new ClassPathXmlApplicationContext("beans.xml");
   personService=(PersonService) act.getBean("personService");
  }

  @Test
  public void save() {
   personService.save(new PersonBean("wyy"));
  }
  @Test
  public void update() {
   PersonBean person=personService.getPerson(1);
   person.setName("wy");
   personService.update(person);
  }
  @Test
  public void getPerson() {
   PersonBean person=personService.getPerson(1);
   System.out.println(person.getName());
  }
  @Test
  public void delete() {
   personService.delete(1);

  }


 }

数据库：

 Create Table

 CREATE TABLE `person` (
   `id` int(11) NOT NULL auto_increment,
   `name` varchar(10) NOT NULL,
   PRIMARY KEY  (`id`)
 ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8