6、spring数据库操作

1.目录结构:

2.数据表结构:

3.代码如下:

Person.java

package db.entity;

public class Person {

    private String username;

    private String password;

    public Person(){}

    

    public Person(String username) {

        this.username = username;

    }

    

    public String getUsername() {

        return username;

    }

    public void setUsername(String username) {

        this.username = username;

    }

    public String getPassword() {

        return password;

    }

    public void setPassword(String password) {

        this.password = password;

    }

}

PersonService.java

package db.service;

import java.util.List;

import db.entity.Person;

public interface PersonService {

    public void save(Person person);

    public void update(Person person);

    public Person getPerson(String username);

    public List<Person> getPersons();

    public void delete(String uersname);

}

PersonServiceBean.java

package db.service.impl;

import java.util.List;

import javax.sql.DataSource;

import org.springframework.jdbc.core.JdbcTemplate;

import org.springframework.transaction.annotation.Transactional;

import db.entity.Person;

import db.service.PersonService;

@Transactional

public class PersonServiceBean implements PersonService {

    private JdbcTemplate jdbcTemplate;

    

    public void setDataSource(DataSource dataSource) {

        this.jdbcTemplate = new JdbcTemplate(dataSource);

    }

    

    @Override

    public void save(Person person) {

        // TODO Auto-generated method stub

        jdbcTemplate.update("insert into s1 (username, password) values(?, ?)", new Object[] {person.getUsername(), person.getPassword()},

                new int[] {java.sql.Types.VARCHAR, java.sql.Types.VARCHAR});

    }



    @Override

    public void update(Person person) {

        jdbcTemplate.update("update s1 set password=? where username=?", new Object[]{person.getPassword(), person.getUsername()},

                new int[]{java.sql.Types.VARCHAR, java.sql.Types.VARCHAR});

    }



    @SuppressWarnings("unchecked")

    @Override

    public Person getPerson(String username) {

        return (Person) jdbcTemplate.queryForObject("select * from s1 where username=?", new Object[]{username},

                new int[] {java.sql.Types.VARCHAR}, new PersonRowManager());

    }



    @SuppressWarnings("unchecked")

    @Override

    public List<Person> getPersons() {

        // TODO Auto-generated method stub

        return (List<Person>) jdbcTemplate.query("select * from s1", new PersonRowManager());

    }



    @Override

    public void delete(String uersname) {

        jdbcTemplate.update("delete from s1 where username=?", new Object[]{uersname},

                new int[]{java.sql.Types.VARCHAR});

    }



}

PersonRowManager.java

package db.service.impl;

import java.sql.ResultSet;

import java.sql.SQLException;

import org.springframework.jdbc.core.RowMapper;

import db.entity.Person;



public class PersonRowManager implements RowMapper{



    @Override

    public Object mapRow(ResultSet rs, int index) throws SQLException {

        // TODO Auto-generated method stub

        Person person = new Person(rs.getString("username"));

        person.setPassword(rs.getString("password"));

        return person;

    }

    

}

PersonServiceBeanTest.java

package db.junit;



import static org.junit.Assert.*;



import org.junit.After;

import org.junit.Before;

import org.junit.Test;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;



import db.entity.Person;

import db.service.PersonService;



public class PersonServiceBeanTest {

    

    private PersonService personService;



    @Before

    public void setUp() throws Exception {

        try {

            ApplicationContext cxt = new ClassPathXmlApplicationContext("beans.xml");

            personService = (PersonService) cxt.getBean("personService");

        } catch (RuntimeException e) {

            e.printStackTrace();

        }

    }



    @After

    public void tearDown() throws Exception {

    }



    @Test

    public void testSetDataSource() {

        fail("Not yet implemented");

    }



    @Test

    public void testSave() {

        Person person = new Person("wxt");

        person.setPassword("3546832");

        System.out.println(person.getUsername() + "   " + person.getPassword());

        personService.save(person);

    }



    @Test

    public void testUpdate() {

        Person person = new Person("zmp");

        person.setPassword("changed");

        personService.update(person);

    }



    @Test

    public void testGetPerson() {

        Person person = personService.getPerson("zmp");

        System.out.println(person.getUsername());

    }



    @Test

    public void testGetPersons() {

        for(Person person : personService.getPersons()){

            System.out.println(person.getUsername());

        }

    }

    @Test

    public void testDelete() {

        personService.delete("zmpandzmp");

    }

}

4.配置如下:

beans.xml

<?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-3.0.xsd

           http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd

           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd

           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">



     <context:property-placeholder location="classpath:jdbc.properties"/>

     <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">

        <property name="driverClassName" value="${driverClassName}"/>

        <property name="url" value="${url}"/>

        <property name="username" value="${username}"/>

        <property name="password" value="${password}"/>

         <!-- 连接池启动时的初始值 -->

         <property name="initialSize" value="${initialSize}"/>

         <!-- 连接池的最大值 -->

         <property name="maxActive" value="${maxActive}"/>

         <!-- 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="${maxIdle}"/>

         <!--  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="${minIdle}"/>

     </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="db.service.impl.PersonServiceBean">

        <property name="dataSource" ref="dataSource"/>

    </bean>

</beans>

jdbc.properties

driverClassName=org.gjt.mm.mysql.Driver

url=jdbc:mysql://localhost:3306/spring?useUnicode=true&characterEncoding=UTF-8

username=root

password=123456

initialSize=1

maxActive=500

maxIdle=2

minIdle=1

5.运行结果如下(只测试getPersons()方法):

与数据库的内容比较:

来自为知笔记(Wiz)