Spring如何基於xml實現宣告式事務控制
阿新 • • 發佈：2020-10-09
一、pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>A02spring</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<!--https://mvnrepository.com/artifact/org.springframework/spring-context-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.2.8.RELEASE</version>
</dependency>
<!--https://mvnrepository.com/artifact/org.springframework/spring-context-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.8.RELEASE</version>
</dependency>
<!--https://mvnrepository.com/artifact/org.springframework/spring-context-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>5.2.8.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.6</version>
</dependency>
<!--https://mvnrepository.com/artifact/org.springframework/spring-context-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.11</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.12</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.2.8.RELEASE</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/junit/junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>二、spring的xml配置檔案
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
https://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
https://www.springframework.org/schema/aop/spring-aop.xsd">
<bean id="accountService" class="com.wuxi.services.impl.AccountServiceImpl">
<property name="accountDao" ref="accountDao"></property>
</bean>
<bean id="accountDao" class="com.wuxi.daos.impl.AccountDaoImpl">
<property name="dataSource" ref="dataSource"></property>
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"></property>
<property name="url"
value="jdbc:mysql://192.168.2.105:3306/ssm?characterEncoding=utf8&useSSL=false"></property>
<property name="username" value="root"></property>
<property name="password" value="123456"></property>
</bean>
<!--
spring中基於xml的宣告式事務控制配置步驟
1、配置事務管理器
2、配置事務的通知
3、配置aop中的通用切入點表示式
4、建立事務通知和切入點表示式的對應關係
5、配置事務的屬性
-->
<!--事務管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!--事務的通知-->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<!--
事務的屬性
isolation：用於指定事務的隔離級別。預設值是DEFAULE，表示使用資料庫的預設隔離級別。
propagation：用於指定事務的傳播行為。預設值是REQUIRED，表示一定會有事務，增刪改的選擇。查詢方法可以選擇SUPPORTYS。
read-only：用於指定事務是否只讀。只有查詢方法才能設定為true。預設值是false，表示讀寫。
timeout：用於指定事務的超時時間，預設值是-1，表示永不超時，如果指定了數值，以秒為單位。
rollback-for：用於指定一個異常，當產生該異常時，事務回滾，產生其他異常時，事務不回滾。沒有預設值。表示任何異常都回滾。
no-rollback-for：用於指定一個異常，當產生該異常時，事務不回滾，產生其他異常時事務回滾。沒有預設值。表示任何異常都回滾。
-->
<tx:attributes>
<tx:method name="*" propagation="REQUIRED" read-only="false"/>
<tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
</tx:attributes>
</tx:advice>
<aop:config>
<!--切入點表示式-->
<aop:pointcut id="ptc" expression="execution(* com.wuxi.services.*.*(..))"/>
<!--切入點表示式和事務通知的對應關係-->
<aop:advisor advice-ref="txAdvice" pointcut-ref="ptc"></aop:advisor>
</aop:config>
</beans>三、實體類
package com.wuxi.beans;
import lombok.Data;
import java.io.Serializable;
@Data
public class Account implements Serializable {
private Integer id;
private String name;
private Float money;
}
四、dao
1、介面
package com.wuxi.daos;
import com.wuxi.beans.Account;
public interface AccountDao {
Account findAccountById(Integer accountId);
Account findAccountByName(String accountName);
void updateAccount(Account account);
}2、實現類
package com.wuxi.daos.impl;
import com.wuxi.beans.Account;
import com.wuxi.daos.AccountDao;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.support.JdbcDaoSupport;
import java.util.List;
public class AccountDaoImpl extends JdbcDaoSupport implements AccountDao {
@Override
public Account findAccountById(Integer accountId) {
List<Account> accounts = getJdbcTemplate().query("select * from account where id = ?",new BeanPropertyRowMapper<Account>(Account.class),accountId);
return accounts.isEmpty() ? null : accounts.get(0);
}
@Override
public Account findAccountByName(String accountName) {
List<Account> accounts = getJdbcTemplate().query("select * from account where name = ?",accountName);
if (accounts.isEmpty()) {
return null;
}
if (accounts.size() > 1) {
throw new RuntimeException("結果集不唯一");
}
return accounts.get(0);
}
@Override
public void updateAccount(Account account) {
getJdbcTemplate().update("update account set name=?,money=? where id=?",account.getName(),account.getMoney(),account.getId());
}
}
五、service
1、介面
package com.wuxi.services;
import com.wuxi.beans.Account;
public interface AccountService {
Account findAccounById(Integer accountId);
void transfer(String sourceName,String targetName,Float money);
}
2、實現類
package com.wuxi.services.impl;
import com.wuxi.beans.Account;
import com.wuxi.daos.AccountDao;
import com.wuxi.services.AccountService;
public class AccountServiceImpl implements AccountService {
private AccountDao accountDao;
public void setAccountDao(AccountDao accountDao) {
this.accountDao = accountDao;
}
@Override
public Account findAccounById(Integer accountId) {
return accountDao.findAccountById(accountId);
}
@Override
public void transfer(String sourceName,Float money) {
Account source = accountDao.findAccountByName(sourceName);
Account target = accountDao.findAccountByName(targetName);
source.setMoney(source.getMoney() - money);
target.setMoney(target.getMoney() + money);
accountDao.updateAccount(source);
int i = 1 / 0;
accountDao.updateAccount(target);
}
}
六、測試
package com.wuxi.tests;
import com.wuxi.services.AccountService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:application.xml")
public class MySpringTest {
@Autowired
private AccountService as;
@Test
public void testTransfer() {
as.transfer("aaa","bbb",100f);
}
}
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支援我們。