详解spring开发_JDBC操作MySQL数据库

Z时代
2024-01-10
分类：IT

本文介绍spring开发_JDBC操作MySQL数据库，具体如下：

项目结构：

数据库表：

/spring_1100_spring+jdbc/src/com/b510/bean/Person.java


package com.b510.bean;
/**
 * 普通的javaBean类Person
 * 
 * @author Hongten
 * 
 */
public class Person {
  /**
   * id号
*/
  private int id;
  /**
   * 姓名
*/
  private String name;
  /**
   * 年龄
*/
  private int age;
  /**
   * 性别
*/
  private String sex;
  public Person(int id, String name, int age, String sex) {
    this.id = id;
    this.name = name;
    this.age = age;
    this.sex = sex;
  }
  public Person() {
  }
  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;
  }
  public int getAge() {
    return age;
  }
  public void setAge(int age) {
    this.age = age;
  }
  public String getSex() {
    return sex;
  }
  public void setSex(String sex) {
    this.sex = sex;
  }
}

/spring_1100_spring+jdbc/src/com/b510/service/PersonService.java


package com.b510.service;
import java.util.List;
import com.b510.bean.Person;
public interface PersonService {
  /**
   * 保存Person
   * 
   * @param person
*/
  public abstract void save(Person person);
  /**
   * 更新Person
   * 
   * @param person
*/
  public abstract void update(Person person);
  /**
   * 获取Person
   * 
   * @param id
   * @return
*/
  public abstract Person getPerson(Integer id);
  /**
   * 获取所有Person
   * 
   * @return
*/
  public abstract List<Person> getPerson();
  /**
   * 删除指定id的Person
   * 
   * @param id
*/
  public abstract void delete(Integer id);
}

/spring_1100_spring+jdbc/src/com/b510/service/impl/PersonServiceBean.java


package com.b510.service.impl;
import java.util.List;
import javax.sql.DataSource;
import org.springframework.jdbc.core.JdbcTemplate;
import com.b510.bean.Person;
import com.b510.service.PersonService;
/**
 * 业务bean
 * 
 * @author Hongten
 * 
 */
public class PersonServiceBean implements PersonService {
  /**
   * 数据源
*/
  private DataSource dataSource;
  /**
   * spring提供的jdbc操作辅助类
*/
  private JdbcTemplate jdbcTemplate;
  // 设置数据源
  public void setDataSource(DataSource dataSource) {
    this.jdbcTemplate = new JdbcTemplate(dataSource);
  }
  public void save(Person person) {
    jdbcTemplate.update("insert into person(name,age,sex)values(?,?,?)",
        new Object[] { person.getName(), person.getAge(),
            person.getSex() }, new int[] { java.sql.Types.VARCHAR,
            java.sql.Types.INTEGER, java.sql.Types.VARCHAR });
  }
  public void update(Person person) {
    jdbcTemplate.update("update person set name=?,age=?,sex=? where id=?",
        new Object[] { person.getName(), person.getAge(),
            person.getSex(), person.getId() }, new int[] {
            java.sql.Types.VARCHAR, java.sql.Types.INTEGER,
            java.sql.Types.VARCHAR, java.sql.Types.INTEGER });
  }
  public Person getPerson(Integer id) {
    Person person = (Person) jdbcTemplate.queryForObject(
        "select * from person where id=?", new Object[] { id },
        new int[] { java.sql.Types.INTEGER }, new PersonRowMapper());
    return person;
  }
  @SuppressWarnings("unchecked")
  public List<Person> getPerson() {
    List<Person> list = jdbcTemplate.query("select * from person", new PersonRowMapper());
    return list;
  }
  public void delete(Integer id) {
    jdbcTemplate.update("delete from person where id = ?", new Object[] { id },
        new int[] { java.sql.Types.INTEGER });
  }
}

/spring_1100_spring+jdbc/src/com/b510/service/impl/PersonRowMapper.java


package com.b510.service.impl;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.springframework.jdbc.core.RowMapper;
import com.b510.bean.Person;
public class PersonRowMapper implements RowMapper {
  @Override
  public Object mapRow(ResultSet set, int index) throws SQLException {
    Person person = new Person(set.getInt("id"), set.getString("name"), set
        .getInt("age"), set.getString("sex"));
    return person;
  }
}

/spring_1100_spring+jdbc/src/com/b510/test/SpringJDBCTest.java


package com.b510.test;
import java.util.List;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.b510.bean.Person;
import com.b510.service.PersonService;
public class SpringJDBCTest {
  public static void main(String[] args) {
    ApplicationContext act = new ClassPathXmlApplicationContext("bean.xml");
    PersonService personService = (PersonService) act
        .getBean("personService");
    Person person = new Person();
    person.setName("苏东坡");
    person.setAge(21);
    person.setSex("男");
    // 保存一条记录
    personService.save(person);
    List<Person> person1 = personService.getPerson();
    System.out.println("++++++++得到所有Person");
    for (Person person2 : person1) {
      System.out.println(person2.getId() + " " + person2.getName()
          + "  " + person2.getAge() + " " + person2.getSex());
    }
    Person updatePerson = new Person();
    updatePerson.setName("Divide");
    updatePerson.setAge(20);
    updatePerson.setSex("男");
    updatePerson.setId(5);
    // 更新一条记录
    personService.update(updatePerson);
    System.out.println("******************");
    // 获取一条记录
    Person onePerson = personService.getPerson(2);
    System.out.println(onePerson.getId() + " " + onePerson.getName()
        + " " + onePerson.getAge() + " " + onePerson.getSex());
    // 删除一条记录
    personService.delete(1);
  }
}

/spring_1100_spring+jdbc/src/bean.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-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">
  <!--配置数据源 -->
  <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
    destroy-method="close">
    <property name="driverClassName" value="org.gjt.mm.mysql.Driver" />
    <property name="url"
      value="jdbc:mysql://localhost:3307/spring?useUnicode=true&characterEncoding=UTF-8" />
    <property name="username" value="root" />
    <property name="password" value="root" />
    <!-- 连接池启动时的初始值 -->
    <property name="initialSize" value="1" />
    <!-- 连接池的最大值 -->
    <property name="maxActive" value="300" />
    <!-- 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>
  <!--
    采用注解方式来配置事务。针对数据源的事务管理器
    ，把我们定义的数据源注入到DataSourceTransactionManager类的属性dataSource中
  -->
  <bean id="txManager"
    class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource" />
  </bean>
  <!--
    引入命名空间： 1.xmlns:tx="http://www.springframework.org/schema/tx
    2.http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
    采用@Transaction注解方式使用事务管理器
  -->
  <tx:annotation-driven transaction-manager="txManager" />
  <!-- 配置业务bean：PersonServiceBean -->
  <bean id="personService" class="com.b510.service.impl.PersonServiceBean">
    <!-- 向属性dataSource注入数据源 -->
    <property name="dataSource" ref="dataSource"></property>
  </bean>
</beans>

运行结果；

2012-3-9 23:30:57 org.springframework.context.support.AbstractApplicationContext prepareRefresh

信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@1a05308: display name [org.springframework.context.support.ClassPathXmlApplicationContext@1a05308]; startup date [Fri Mar 09 23:30:57 CST 2012]; root of context hierarchy

2012-3-9 23:30:57 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions

信息: Loading XML bean definitions from class path resource [bean.xml]

2012-3-9 23:30:58 org.springframework.context.support.AbstractApplicationContext obtainFreshBeanFactory

信息: Bean factory for application context [org.springframework.context.support.ClassPathXmlApplicationContext@1a05308]: org.springframework.beans.factory.support.DefaultListableBeanFactory@2bb514

2012-3-9 23:30:58 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons

信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@2bb514: defining beans [dataSource,txManager,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0,org.springframework.transaction.interceptor.TransactionInterceptor#0,org.springframework.transaction.config.internalTransactionAdvisor,personService]; root of factory hierarchy

++++++++得到所有Person

2 TomCat 12 女

3 hongten 21 男

4 liufang 21 女

5 Divide 20 男

6 Jone 20 女

7 苏东坡 21 男

******************

2 TomCat 12 女

当然我们可以用配置文件来存放我们的数据源信息：

/spring_1100_spring+jdbc/src/jdbc.properties


driverClassName=org.gjt.mm.mysql.Driver
url=jdbc\:mysql\://localhost\:3307/spring?useUnicode\=true&characterEncoding\=UTF-8
username=root
password=root
initialSize=1
maxActive=300
maxIdle=2
minIdle=1

相应要修改：

/spring_1100_spring+jdbc/src/bean.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-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">
  <!-- 读取jdbc.properties配置文件 -->
  <context:property-placeholder location="classpath:jdbc.properties" />
  <!--配置数据源 -->
  <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>
  <!--
    采用注解方式来配置事务。针对数据源的事务管理器
    ，把我们定义的数据源注入到DataSourceTransactionManager类的属性dataSource中
  -->
  <bean id="txManager"
    class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource" />
  </bean>
  <!--
    引入命名空间： 1.xmlns:tx="http://www.springframework.org/schema/tx
    2.http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
    采用@Transaction注解方式使用事务管理器
  -->
  <tx:annotation-driven transaction-manager="txManager" />
  <!-- 配置业务bean：PersonServiceBean -->
  <bean id="personService" class="com.b510.service.impl.PersonServiceBean">
    <!-- 向属性dataSource注入数据源 -->
    <property name="dataSource" ref="dataSource"></property>
  </bean>
</beans>

运行结果是相同的：


2012-3-10 0:23:59 org.springframework.context.support.AbstractApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@c1b531: display name [org.springframework.context.support.ClassPathXmlApplicationContext@c1b531]; startup date [Sat Mar 10 00:23:59 CST 2012]; root of context hierarchy
2012-3-10 0:23:59 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [bean.xml]
2012-3-10 0:23:59 org.springframework.context.support.AbstractApplicationContext obtainFreshBeanFactory
信息: Bean factory for application context [org.springframework.context.support.ClassPathXmlApplicationContext@c1b531]: org.springframework.beans.factory.support.DefaultListableBeanFactory@1aa57fb
2012-3-10 0:23:59 org.springframework.core.io.support.PropertiesLoaderSupport loadProperties
信息: Loading properties file from class path resource [jdbc.properties]
2012-3-10 0:23:59 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1aa57fb: defining beans [org.springframework.beans.factory.config.PropertyPlaceholderConfigurer#0,dataSource,txManager,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0,org.springframework.transaction.interceptor.TransactionInterceptor#0,org.springframework.transaction.config.internalTransactionAdvisor,personService]; root of factory hierarchy
++++++++得到所有Person
2 TomCat  12 女
3 hongten  21 男
4 liufang  21 女
5 Divide  20 男
6 Jone  20 女
7 苏东坡  21 男
8 苏东坡  21 男
******************
2 TomCat 12 女