spring 配置xml方式及 注解方式 实现 demo

xml 方式实现

public class Dept {

private int deptId;
private String deptName;
public int getDeptId() {
return deptId;
}
public void setDeptId(int deptId) {
this.deptId = deptId;
}
public String getDeptName() {
return deptName;
}
public void setDeptName(String deptName) {
this.deptName = deptName;
}

}

import org.springframework.jdbc.core.JdbcTemplate;

/**
 * dao实现，使用Spring对jdbc支持功能
 * 
 *
 */
public class DeptDao {
    
    // 容器注入JdbcTemplate对象
    private JdbcTemplate jdbcTemplate;
    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

    public void save(Dept dept){
        String sql = "insert into t_dept (deptName) values(?)";
        jdbcTemplate.update(sql,dept.getDeptName());
    }
}

import org.springframework.jdbc.core.JdbcTemplate;

/**
 * Service
 *
 *
 */
public class DeptService {
    
    // 容器注入dao对象
    private DeptDao deptDao;
    public void setDeptDao(DeptDao deptDao) {
        this.deptDao = deptDao;
    }

    /*
     * 事务控制？
     */
    public void save(Dept dept){
        // 第一次调用
        deptDao.save(dept);
        
        int i = 1/0; // 异常： 整个Service.save()执行成功的要回滚
        
        // 第二次调用
        deptDao.save(dept);
    }
}

<?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:p="http://www.springframework.org/schema/p"
    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/aop
         http://www.springframework.org/schema/aop/spring-aop.xsd
         http://www.springframework.org/schema/tx
          http://www.springframework.org/schema/tx/spring-tx.xsd">

    
    <!-- 1. 数据源对象: C3P0连接池 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql:///hib_demo"></property>
        <property name="user" value="root"></property>
        <property name="password" value="root"></property>
        <property name="initialPoolSize" value="3"></property>
        <property name="maxPoolSize" value="10"></property>
        <property name="maxStatements" value="100"></property>
        <property name="acquireIncrement" value="2"></property>
    </bean>
    
    <!-- 2. JdbcTemplate工具类实例 -->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    
    <!-- 3. dao实例 -->
    <bean id="deptDao" class="cn.itcast.a_tx.DeptDao">
        <property name="jdbcTemplate" ref="jdbcTemplate"></property>
    </bean>
 
    <!-- 4. service实例 -->
    <bean id="deptService" class="cn.itcast.a_tx.DeptService">
        <property name="deptDao" ref="deptDao"></property>
    </bean>
    
    <!-- #############5. Spring声明式事务管理配置############### -->
    <!-- 5.1 配置事务管理器类 -->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    
    <!-- 5.2 配置事务增强(如果管理事务?) -->
    <tx:advice id="txAdvice" transaction-manager="txManager">
        <tx:attributes>
            <tx:method name="*" read-only="false"/>
        </tx:attributes>
    </tx:advice>
    
    <!-- 5.3 Aop配置： 拦截哪些方法(切入点表表达式) + 应用上面的事务增强配置 -->
    <aop:config>
        <aop:pointcut expression="execution(* cn.itcast.a_tx.DeptService.save(..))" id="pt"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/>
    </aop:config>
    
</beans>      

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class App {

    @Test
    public void testApp() throws Exception {
        //容器对象
        ApplicationContext ac = new ClassPathXmlApplicationContext("cn/itcast/a_tx/bean.xml");
        
        // 模拟数据
        Dept dept = new Dept();
        dept.setDeptName("测试： 开发部");
        
        DeptService deptService = (DeptService) ac.getBean("deptService");
        deptService.save(dept);
        
    }
}

注解方式实现 

public class Dept {

    private int deptId;
    private String deptName;
    public int getDeptId() {
        return deptId;
    }
    public void setDeptId(int deptId) {
        this.deptId = deptId;
    }
    public String getDeptName() {
        return deptName;
    }
    public void setDeptName(String deptName) {
        this.deptName = deptName;
    }
    
}


import javax.annotation.Resource;

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

/**
 * dao实现，使用Spring对jdbc支持功能
 * 
 */
@Repository
public class DeptDao {
    
    @Resource
    private JdbcTemplate jdbcTemplate;

    public void save(Dept dept){
        String sql = "insert into t_dept (deptName) values(?)";
        jdbcTemplate.update(sql,dept.getDeptName());
    }
}


import javax.annotation.Resource;

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Isolation;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

/**
 * Service
 * 
 *
 */
@Service
public class DeptService {
    
    // 部门dao
    @Resource
    private DeptDao deptDao;
    
    // 日志dao
    @Resource
    private LogDao logDao;

    /*
     * 事务控制？
     */
    @Transactional(
            readOnly = false,  // 读写事务
            timeout = -1,       // 事务的超时时间不限制
            //noRollbackFor = ArithmeticException.class,  // 遇到数学异常不回滚
            isolation = Isolation.DEFAULT,              // 事务的隔离级别，数据库的默认
            propagation = Propagation.REQUIRED            // 事务的传播行为
    )
    public void save(Dept dept){
        logDao.insertLog();  // 保存日志  【自己开启一个事务】
        int i = 1/0;
        deptDao.save(dept);  // 保存部门
    }
}



import javax.annotation.Resource;

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

// 测试： 日志传播行为
@Repository
public class LogDao {
    
    @Resource
    private JdbcTemplate jdbcTemplate;
    
    // 始终开启事务
    @Transactional(propagation = Propagation.REQUIRES_NEW)
    public void insertLog() {
        jdbcTemplate.update("insert into log_ values('在保存Dept..')");
    }
}




<?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:p="http://www.springframework.org/schema/p"
    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/aop
         http://www.springframework.org/schema/aop/spring-aop.xsd
         http://www.springframework.org/schema/tx
          http://www.springframework.org/schema/tx/spring-tx.xsd">

    
    <!-- 1. 数据源对象: C3P0连接池 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql:///hib_demo"></property>
        <property name="user" value="root"></property>
        <property name="password" value="root"></property>
        <property name="initialPoolSize" value="3"></property>
        <property name="maxPoolSize" value="10"></property>
        <property name="maxStatements" value="100"></property>
        <property name="acquireIncrement" value="2"></property>
    </bean>
    
    <!-- 2. JdbcTemplate工具类实例 -->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    
    <!-- 事务管理器类 -->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    
    <!-- 开启注解扫描 -->
    <context:component-scan base-package="cn.itcast.b_anno"></context:component-scan>
    
    <!-- 注解方式实现事务： 指定注解方式实现事务 -->
    <tx:annotation-driven transaction-manager="txManager"/>
    
    <bean class="cn.itcast.b_anno.DeptDao"></bean>
</beans>      



import java.util.Arrays;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class App {

    @Test
    public void testApp() throws Exception {
        //容器对象
        ApplicationContext ac = new ClassPathXmlApplicationContext("cn/itcast/b_anno/bean.xml");
        
        // 模拟数据
        Dept dept = new Dept();
        dept.setDeptName("测试： 开发部");
        
        DeptService deptService = (DeptService) ac.getBean("deptService");
        deptService.save(dept);
    }
    
    // 了解容器的相关方法
    @Test
    public void testApp2() throws Exception {
        //1. 根据bean.xml配置路径，创建容器对象
        //ApplicationContext ac = new ClassPathXmlApplicationContext("cn/itcast/b_anno/bean.xml");

        //2. 根据多个配置文件的路径，创建容器对象
        //ApplicationContext ac = new ClassPathXmlApplicationContext(new String[]{});
        
        //3.  容器对象相关方法
        ApplicationContext ac = 
            new ClassPathXmlApplicationContext("cn/itcast/b_anno/bean.xml");
        //3.1 从容器中获取指定名称的bean对象
        //DeptDao deptDao = (DeptDao) ac.getBean("deptDao");
        //3.2 根据类型从容器获取实例 【改类型只能在IOC中有唯一的对象，否则报错】
        //DeptDao deptDao = ac.getBean(DeptDao.class);
        //3.3 泛型，不需要强转
        //DeptDao deptDao = ac.getBean("deptDap", DeptDao.class);
        //3.4 获取容器中bean对象的数量
        //int count = ac.getBeanDefinitionCount();
        String[] names = ac.getBeanDefinitionNames();
        System.out.println(Arrays.toString(names));
    }
}