Java开发之Spring连接数据库方法 Java开发之Spring连接数据库方法实例分析
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本文实例讲述了Java开发之Spring连接数据库方法。分享给大家供大家参考，具体如下：
接口：
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
希望本文所述对大家Java程序设计有所帮助。
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