本文實例講述了Java開發之Spring連接數據庫方法。分享給大家供大家參考，具體如下：
接口：
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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); //獲取person public PersonBean getPerson(int id); public List<PersonBean> getPersonBean(); //刪除記錄 public void delete(int personid); } |
Person Bean類：
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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; } } |
接口實現：
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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:
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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
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<?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池啟動時的初始值 --> <property name="password" value="123"/> <!-- 連接name="initialSize" value="${initialSize}"/>--> <property name="initialSize" value="1"/> <!-- 連接池的最大值 --> <property name="maxActive" value="500"/> <!-- 最大空閑值.當經過一個高峰時間后，連接池可以慢慢將已經用不到的連接慢慢釋放一部分，一直減少到maxIdle為止 --> <property name="maxIdle" value="2"/> <!-- 最小空閑值.當空閑的連接數少于閥值時，連接池就會預申請去一些連接，以免洪峰來時來不及申請 --> <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> |
測試類：
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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); } } |
數據庫：
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Create TableCREATE 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 |
希望本文所述對大家Java程序設計有所幫助。
