Java开发之Spring连接数据库方法实例分析

2024-07-13 09:55:48

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这篇文章主要介绍了Java开发之Spring连接数据库方法,以实例形式较为详细的分析了Java Spring开发中针对数据库的相关操作技巧,具有一定参考借鉴价值,需要的朋友可以参考下

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

">



<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 name="password" value="123"/>



<property name="initialSize" value="1"/>



<property name="maxActive" value="500"/>



<property name="maxIdle" value="2"/>



<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