Spring中のJdbcTemplate
68152 ワード
JdbcTemplate概要
JdbcTemplateはspringフレームワークで提供されるオブジェクトであり、元のJdbc APIオブジェクトに対するシンプルなパッケージである.springフレームは多くの操作テンプレート類を提供してくれます.例えば、操作関係型データの:JdbcTemplate HbernaleTemplateなど、nosqlデータベースを操作している:Redis Templateなどの操作メッセージキューの:JmsTemplate
次に私達は口座の添削を例にとって、実例の説明を行います.まずこのような表を作成します.
JdbcTemplateはspringフレームワークで提供されるオブジェクトであり、元のJdbc APIオブジェクトに対するシンプルなパッケージである.springフレームは多くの操作テンプレート類を提供してくれます.例えば、操作関係型データの:JdbcTemplate HbernaleTemplateなど、nosqlデータベースを操作している:Redis Templateなどの操作メッセージキューの:JmsTemplate
次に私達は口座の添削を例にとって、実例の説明を行います.まずこのような表を作成します.
create table account(id int primary key auto_increment,name varchar(20),money float);
次に二つのデータを挿入します.insert into account values(null,"jack",1000),(null,"tina",1000);
関連するjarパッケージ座標をインポート<packaging>jarpackaging>
<dependencies>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>8.0.11version>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>4.12version>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druidartifactId>
<version>1.0.9version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-jdbcartifactId>
<version>5.0.3.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-contextartifactId>
<version>5.0.3.RELEASEversion>
dependency>
dependencies>
アカウントエンティティクラスを作成するAccount.java
package domain;
import java.io.Serializable;
/**
*
*/
public class Account implements Serializable {
private Integer id;
private String name;
private Float money;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Float getMoney() {
return money;
}
public void setMoney(Float money) {
this.money = money;
}
@Override
public String toString() {
return "Account{" +
"id=" + id +
", name='" + name + '\'' +
", money=" + money +
'}';
}
}
アカウントDAOインターフェースの作成IAccountDao.java
package dao;
import domain.Account;
import java.util.List;
/**
*
*/
public interface IAccountDao {
/**
*
* @return
*/
List<Account> findAllAccount();
/**
* ID
* @return
*/
Account findAccountById(Integer accountId);
/**
*
* @param account
*/
int saveAccount(Account account);
/**
*
* @param account
*/
int updateAccount(Account account);
/**
*
* @param acccountId
*/
int deleteAccount(Integer acccountId);
/**
*
* @param accountName
* @return , null
*
*/
Account findAccountByName(String accountName);
}
DAO実現類の作成AccountDaoImpl.java
package dao.impl;
import dao.IAccountDao;
import domain.Account;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import java.util.List;
/**
*
*/
public class AccountDaoImpl implements IAccountDao {
private JdbcTemplate jdbcTemplate;
public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
this.jdbcTemplate = jdbcTemplate;
}
public List<Account> findAllAccount() {
String sql = "select * from account";
List<Account> accounts = jdbcTemplate.query(sql, new BeanPropertyRowMapper<Account>(Account.class));
return accounts;
}
public Account findAccountById(Integer accountId) {
String sql = "select * from account where id=?";
List<Account> accounts = jdbcTemplate.query(sql,new BeanPropertyRowMapper<Account>(Account.class),accountId);
if (accounts.isEmpty()){
return null;
}
return accounts.get(0);
}
public int saveAccount(Account account) {
String sql = "insert into account values(?,?,?)";
return jdbcTemplate.update(sql, account.getId(), account.getName(), account.getMoney());
}
public int updateAccount(Account account) {
String sql = "update account set id=?,name=?,money=? where id=?";
return jdbcTemplate.update(sql, account.getId(), account.getName(), account.getMoney(), account.getId());
}
public int deleteAccount(Integer acccountId) {
String sql = "delete from account where id=?";
return jdbcTemplate.update(sql, acccountId);
}
public Account findAccountByName(String accountName) {
String sql = "select * from account where name=?";
List<Account> accounts = jdbcTemplate.query(sql, new BeanPropertyRowMapper<Account>(Account.class), accountName);
if (accounts.size()>1)
{
throw new RuntimeException(" 1");
}
if (accounts.isEmpty())
{
return null;
}
return accounts.get(0);
}
}
アカウントを作成するServiceインターフェースIAccountService.java
package service;
import domain.Account;
import java.util.List;
public interface IAccountService {
List<Account> findAllAccount();
Account findAccountById(Integer accountId);
int saveAccount(Account account);
int updateAccount(Account account);
int deleteAccount(Integer acccountId);
Account findAccountByName(String accountName);
boolean transformAccount(Account a1,Account a2,int money);
}
Service実現類の作成AccountServiceImpl.java
package service.impl;
import dao.IAccountDao;
import domain.Account;
import service.IAccountService;
import java.util.List;
public class AccountServiceImpl implements IAccountService {
private IAccountDao accountDao;
public void setAccountDao(IAccountDao accountDao) {
this.accountDao = accountDao;
}
public List<Account> findAllAccount() {
return accountDao.findAllAccount();
}
public Account findAccountById(Integer accountId) {
return accountDao.findAccountById(accountId);
}
public int saveAccount(Account account) {
return accountDao.saveAccount(account);
}
public int updateAccount(Account account) {
return accountDao.updateAccount(account);
}
public int deleteAccount(Integer acccountId) {
return accountDao.deleteAccount(acccountId);
}
public Account findAccountByName(String accountName) {
return accountDao.findAccountByName(accountName);
}
/**
*
* @param a1
* @param a2
* @param money
* @return
*/
public boolean transformAccount(Account a1, Account a2, int money) {
a1.setMoney(a1.getMoney()-money);
a2.setMoney(a2.getMoney()+money);
updateAccount(a1);
updateAccount(a2);
return true;
}
}
springのプロファイルを作成する
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
">
<bean id="accountServiceImpl" class="service.impl.AccountServiceImpl">
<property name="accountDao" ref="accountDaoImpl">property>
bean>
<bean id="accountDaoImpl" class="dao.impl.AccountDaoImpl">
<property name="jdbcTemplate" ref="jdbcTemplate">property>
bean>
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init"
destroy-method="close">
<property name="driverClassName" value="com.mysql.cj.jdbc.Driver">property>
<property name="url" value="jdbc:mysql://localhost:3306/class_db?useUnicode=true&serverTimezone=GMT&useSSL=false">property>
<property name="username" value="root">property>
<property name="password" value="qwe123">property>
<property name="filters" value="stat" />
<property name="maxActive" value="20" />
<property name="initialSize" value="1" />
<property name="minIdle" value="1" />
<property name="maxWait" value="60000" />
<property name="timeBetweenEvictionRunsMillis" value="60000" />
<property name="minEvictableIdleTimeMillis" value="300000" />
<property name="testWhileIdle" value="true" />
<property name="testOnBorrow" value="false" />
<property name="testOnReturn" value="false" />
<property name="poolPreparedStatements" value="true" />
<property name="maxOpenPreparedStatements" value="20" />
bean>
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource">property>
bean>
beans>
テストコードimport domain.Account;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import service.IAccountService;
import java.util.List;
public class testdemo {
private ApplicationContext ac;
private IAccountService as;
@Before
public void init()
{
ac = new ClassPathXmlApplicationContext("bean.xml");
as = ac.getBean("accountServiceImpl", IAccountService.class);
}
@Test
public void testFindall()
{
List<Account> allAccount = as.findAllAccount();
for (Account account : allAccount) {
System.out.println(account);
}
}
@Test
public void testFindbyid()
{
Account accountById = as.findAccountById(1);
System.out.println(accountById);
}
@Test
public void testFindbyname()
{
Account jack = as.findAccountByName("jack");
System.out.println(jack);
}
@Test
public void testSave()
{
Account test = new Account();
test.setName("test");
test.setMoney(2000f);
as.saveAccount(test);
}
@Test
public void testUpdate()
{
Account account = as.findAccountById(10);
account.setMoney(3000f);
account.setName("test1");
as.updateAccount(account);
}
@Test
public void testDelete()
{
as.deleteAccount(10);
}
@Test
public void testTransformaccount()
{
Account account1 = as.findAccountById(1);
Account account2 = as.findAccountById(2);
as.transformAccount(account1,account2,100);
}
}
以上が今日共有したSpringのJdbcTemplateの添削についての使用です.皆さんに何か収穫がありますように、ご注目ください.