• spring框架 事务 xml配置方式


    user=LF
    password=LF
    jdbcUrl=jdbc:oracle:thin:@localhost:1521:orcl
    driverClass=oracle.jdbc.driver.OracleDriver
    
    initialPoolSize=15
    maxPoolSize=25
    minPoolSize=5
    <?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.xsd
            http://www.springframework.org/schema/context 
            http://www.springframework.org/schema/context/spring-context.xsd
            http://www.springframework.org/schema/tx 
            http://www.springframework.org/schema/tx/spring-tx.xsd
            http://www.springframework.org/schema/aop 
            http://www.springframework.org/schema/aop/spring-aop.xsd">
            
        <!-- 引入外部文件 -->
        <context:property-placeholder location="classpath:db.properties"/>
        <!-- 配置dataSource -->
        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
            <property name="user" value="${user}"></property>
            <property name="password" value="${password}"></property>
            <property name="jdbcUrl" value="${jdbcUrl}"></property>
            <property name="driverClass" value="${driverClass}"></property>
            
            <property name="initialPoolSize" value="${initialPoolSize}"></property>
            <property name="maxPoolSize" value="${maxPoolSize}"></property>
            <property name="minPoolSize" value="${minPoolSize}"></property>
        </bean>
        
        <!-- 配置jdbcTemplate -->
        <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
            <property name="dataSource" ref="dataSource"></property>
        </bean>
        
        <bean id="amountDaoImpl" class="com.zr.trasaction.AmountDaoImpl.AmountDaoImpl">
            <property name="jdbcTemplate" ref="jdbcTemplate"></property>
        </bean>
        
        <bean id="amountServiceImpl" class="com.zr.trasaction.AmountServiceImpl.AmountServiceImpl">
            <property name="amountDaoImpl" ref="amountDaoImpl"></property>
            <property name="jdbcTemplate" ref="jdbcTemplate"></property>
        </bean>
        
        <!-- 配置事务管理器 -->
        <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="dataSource"></property>
        </bean>
        <!-- 配置事务的属性 -->
        <tx:advice id="txadvice" transaction-manager="transactionManager">
            <tx:attributes>
                <tx:method name="transferMoneyService" propagation="REQUIRED"/>
                <!-- read-only="true"只是为了数据库维护方便 -->
                <tx:method name="transferMoneyService" read-only="true"/>
            </tx:attributes>
        </tx:advice>
        <!-- 配置切面,让切面和事务关联起来 -->
        <aop:config>
            <aop:pointcut expression="execution(* com.zr.trasaction.AmountServiceImpl.*.*(..))" id="pointcut"/>
            <aop:advisor advice-ref="txadvice" pointcut-ref="pointcut"/>
        </aop:config>
    
    </beans>
    package com.zr.trasaction.entity;
    
    
    
    public class Amount {
        
        private String user;//用户名
        private double money;//金额
        public String getUser() {
            return user;
        }
        public void setUser(String user) {
            this.user = user;
        }
        public double getMoney() {
            return money;
        }
        public void setMoney(double money) {
            this.money = money;
        }
        public Amount() {
            super();
        }
        public Amount(String user, double money) {
            super();
            this.user = user;
            this.money = money;
        }
        @Override
        public String toString() {
            return "Amount [user=" + user + ", money=" + money + "]";
        }
        
        
        
    
    }
    package com.zr.trasaction.entity;
    
    public class BalanceException extends RuntimeException {
    
        private static final long serialVersionUID = 1L;
    
    
        public BalanceException() {
            super();
        }
    
        public BalanceException(String message) {
            super(message);
        }
    
        public BalanceException(String message, Throwable cause) {
            super(message, cause);
        }
    
        
        public BalanceException(Throwable cause) {
            super(cause);
        }
    
       
        protected BalanceException(String message, Throwable cause,
                                   boolean enableSuppression,
                                   boolean writableStackTrace) {
            super(message, cause, enableSuppression, writableStackTrace);
        }
    }
    package com.zr.trasaction.AmountDao;
    
    public interface AmountDao {
        
        /**
         * 转出钱
         * @return
         */
        public boolean decreaseMoney(String username,double money) ;
        
        /**
         * 转入钱
         * @return
         */
        public boolean increaseMoney(String username,double money);
        
    }
    package com.zr.trasaction.AmountDaoImpl;
    
    import org.springframework.jdbc.core.JdbcTemplate;
    
    import com.zr.trasaction.AmountDao.AmountDao;
    
    
    public class AmountDaoImpl implements AmountDao {
    
        private JdbcTemplate jdbcTemplate;
        
        public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
            this.jdbcTemplate = jdbcTemplate;
        }
    
        @Override
        public boolean decreaseMoney(String username, double money) {
            
            String sql = "UPDATE TEST SET MONEY=MONEY-? WHERE USERNAME=?";
            int i = -1;
            i = jdbcTemplate.update(sql,money, username);
            if(i>0){
                return true;
            }
            return false;
        }
    
        @Override
        public boolean increaseMoney(String username, double money) {
            String sql = "UPDATE TEST SET MONEY=MONEY+? WHERE USERNAME=?";
            int i = -1;
            i = jdbcTemplate.update(sql,money, username);
            if(i>0){
                return true;
            }
            return false;
        }
    
    }
    package com.zr.trasaction.AmountService;
    
    import com.zr.trasaction.entity.Amount;
    
    public interface AmountService {
        
        /**
         * 转账业务
         * @param desAmount 扣钱的账户
         * @param incAmount    增加的账户
         * @param money 转账的金额
         * @return
         */
        public boolean transferMoneyService(Amount desAmount,Amount incAmount,double money);
        
    }
    package com.zr.trasaction.AmountServiceImpl;
    
    import org.springframework.jdbc.core.JdbcTemplate;
    
    import com.zr.trasaction.AmountDaoImpl.AmountDaoImpl;
    import com.zr.trasaction.AmountService.AmountService;
    import com.zr.trasaction.entity.Amount;
    import com.zr.trasaction.entity.BalanceException;
    
    public class AmountServiceImpl implements AmountService {
    
        private AmountDaoImpl amountDaoImpl;
        private JdbcTemplate jdbcTemplate;
    
        public void setAmountDaoImpl(AmountDaoImpl amountDaoImpl) {
            this.amountDaoImpl = amountDaoImpl;
        }
    
        public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
            this.jdbcTemplate = jdbcTemplate;
        }
    
    
        @Override
        public boolean transferMoneyService(Amount desAmount, Amount incAmount,
                double money) {
            String sql = "SELECT MONEY FROM TEST WHERE USERNAME=?";
            double balance = jdbcTemplate.queryForObject(sql, Double.class, desAmount.getUser());
    
            boolean success1 = amountDaoImpl.decreaseMoney(desAmount.getUser(), money);
            boolean success2 = amountDaoImpl.increaseMoney(incAmount.getUser(), money);
            
            if(balance < money){
                throw new BalanceException("余额不足");
            }
            return success1 && success2;
        }
    
    }
    package com.zr.trasaction.test;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    import com.zr.trasaction.AmountService.AmountService;
    import com.zr.trasaction.entity.Amount;
    
    public class TestA {
    
        public static void main(String[] args) {
            
            ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
    
            Amount desAmount = new Amount("lf", 0);
            Amount incAmount = new Amount("tl", 0);
            AmountService impl = (AmountService)ac.getBean("amountServiceImpl");
            boolean isSuccess = impl.transferMoneyService(desAmount, incAmount, 10);
            System.out.println("==:"+isSuccess);
        }
        
        
    }
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  • 原文地址:https://www.cnblogs.com/lantu1989/p/6361231.html
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