聲明式事務管理
阿新 • • 發佈：2017-08-31
pre export val provider date param ssp warning trace 
聲明事務管理（數據庫連接池）
1.dao
1 package com.zhidi.dao; 2 3 import java.sql.Connection; 4 import java.sql.PreparedStatement; 5 import java.sql.ResultSet; 6 import java.sql.SQLException; 7 8 import javax.sql.DataSource; 9 10 import org.hibernate.Session; 11 import org.hibernate.SessionFactory;View Code12 import org.springframework.beans.factory.annotation.Autowired; 13 import org.springframework.stereotype.Repository; 14 15 import com.zhidi.entity.Emp; 16 17 @Repository 18 public class EmpDao { 19 @Autowired 20 private DataSource dataSource; 21 @Autowired 22 private SessionFactory sessionFactory;23 24 public void query() { 25 try { 26 Connection connection = dataSource.getConnection(); 27 PreparedStatement statement = connection.prepareStatement("select * from emp"); 28 ResultSet set = statement.executeQuery(); 29 while (set.next()) {30 String name = set.getString("ename"); 31 System.out.println(name); 32 } 33 } catch (SQLException e) { 34 e.printStackTrace(); 35 } 36 } 37 38 public void get(Integer id) { 39 Session session = sessionFactory.getCurrentSession(); 40 session.beginTransaction(); 41 session.get(Emp.class, id); 42 session.getTransaction().commit(); 43 } 44 45 public Emp getById(Integer id) 46 { 47 Session session = sessionFactory.getCurrentSession(); 48 Emp emp=(Emp)session.get(Emp.class, id); 49 return emp; 50 } 51 52 public void delete(Integer id) 53 { 54 Session session = sessionFactory.getCurrentSession(); 55 Emp emp= getById(id); 56 session.delete(emp); 57 58 } 59 }
2.entity
1 package com.zhidi.entity; 2 3 import java.util.Date; 4 5 import javax.persistence.Entity; 6 import javax.persistence.GeneratedValue; 7 import javax.persistence.GenerationType; 8 import javax.persistence.Id; 9 import javax.persistence.Table; 10 import javax.persistence.Temporal; 11 import javax.persistence.TemporalType; 12 13 @Entity 14 @Table(name = "emp") 15 public class Emp { 16 @Id 17 @GeneratedValue(strategy = GenerationType.AUTO) 18 private Integer empno; 19 private String ename; 20 @Temporal(TemporalType.DATE) 21 private Date hiredate; 22 23 public Integer getEmpno() { 24 return empno; 25 } 26 27 public void setEmpno(Integer empno) { 28 this.empno = empno; 29 } 30 31 public String getEname() { 32 return ename; 33 } 34 35 public void setEname(String ename) { 36 this.ename = ename; 37 } 38 39 public Date getHiredate() { 40 return hiredate; 41 } 42 43 public void setHiredate(Date hierdate) { 44 this.hiredate = hierdate; 45 } 46 47 }View Code
3.service
1 package com.zhidi.service; 2 3 import org.springframework.beans.factory.annotation.Autowired; 4 import org.springframework.stereotype.Service; 5 import org.springframework.transaction.annotation.Propagation; 6 import org.springframework.transaction.annotation.Transactional; 7 8 import com.zhidi.dao.EmpDao; 9 import com.zhidi.entity.Emp; 10 @Transactional 11 @Service 12 public class EmpService { 13 @Autowired 14 private EmpDao empDao; 15 @Transactional(propagation=Propagation.SUPPORTS,readOnly=true) 16 public Emp getById(Integer id) 17 { 18 return empDao.getById(id); 19 } 20 21 public void deleteById(Integer id) 22 { 23 empDao.delete(id); 24 } 25 26 }View Code
4.test
1 package com.zhidi.test; 2 3 import org.springframework.context.ApplicationContext; 4 import org.springframework.context.support.ClassPathXmlApplicationContext; 5 6 import com.zhidi.dao.EmpDao; 7 8 public class TestEmp { 9 10 public static void main(String[] args) { 11 @SuppressWarnings("resource") 12 ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml"); 13 EmpDao empDao = context.getBean(EmpDao.class); 14 empDao.query(); 15 16 empDao.get(7965); 17 } 18 }View Code
1 package com.zhidi.test; 2 3 import org.springframework.context.ApplicationContext; 4 import org.springframework.context.support.ClassPathXmlApplicationContext; 5 6 import com.zhidi.entity.Emp; 7 import com.zhidi.service.EmpService; 8 9 public class TestTx { 10 11 public static void main(String[] args) { 12 @SuppressWarnings("resource") 13 ApplicationContext context =new ClassPathXmlApplicationContext("applicationContext.xml"); 14 EmpService service=context.getBean(EmpService.class); 15 Emp emp=service.getById(7959); 16 System.out.println(emp.getEname()); 17 18 service.deleteById(7951); 19 20 } 21 22 }View Code
5.applicationContext.xml
1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" 4 xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" 5 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd 6 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd 7 http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd 8 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd"> 9 10 <!-- 打開配置 --> 11 <!-- <context:component-scan base-package="com.zhidi" /> --> 12 <context:property-placeholder location="jdpc.properties" /> 13 <!-- 將c3p0交給Spring的IOC容器管理 --> 14 <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> 15 <!-- 必要的配置 --> 16 <property name="driverClass" value="${jdpc.driverClass}" /> 17 <property name="jdbcUrl" value="${jdpc.url}" /> 18 <property name="user" value="${jdpc.userName}" /> 19 <property name="password" value="${jdpc.password}" /> 20 <!-- 初始化連接數 --> 21 <property name="initialPoolSize" value="3" /> 22 <!-- 最大連接數 --> 23 <property name="maxPoolSize" value="10" /> 24 <!-- 最小連接數 --> 25 <property name="minPoolSize" value="1"></property> 26 <!-- 最大的連接時間8小時 --> 27 <property name="maxConnectionAge" value="28800"></property> 28 <!-- 需要防止8小時陷阱，需要設置時間小於8小時 --> 29 <!-- 設置為6小時 --> 30 <property name="maxIdleTime" value="21600"></property> 31 </bean> 32 33 <!-- 將LocalSessionFactoryBean交給Spring的IOC容器管理 --> 34 <bean id="sessionFactory" 35 class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> 36 <!-- 將c3p0的數據源註入到SessionFactory --> 37 <property name="dataSource" ref="dataSource"></property> 38 <!-- 指定hibernate的配置信息 --> 39 <property name="hibernateProperties"> 40 <props> 41 <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop> 42 <prop key="hibernate.show_sql">true</prop> 43 <prop key="hibernate.format_sql">true</prop> 44 <!-- 刪掉或者把 thread改為org.springframework.orm.hibernate4.SpringSessionContext--> 45 <prop key="hibernate.current_session_context_class">org.springframework.orm.hibernate4.SpringSessionContext</prop> 46 </props> 47 </property> 48 <!-- 指定掃描@entity的實體類 --> 49 <property name="packagesToScan" value="com.zhidi.entity" /> 50 </bean> 51 52 <!-- 定義hibernate的事務管理 --> 53 <bean id="transactionManager" 54 class="org.springframework.orm.hibernate4.HibernateTransactionManager"> 55 <!-- 將sessionFactory註入事務管理器中 --> 56 <property name="sessionFactory" ref="sessionFactory" /> 57 </bean> 58 <!-- 開啟事務管理的配置 --> 59 <tx:annotation-driven transaction-manager="transactionManager"/> 60 61 <!-- 配置事務管理 --> 62 <!-- <tx:advice id="txAdvice" transaction-manager="transactionManager"> 63 為不同的目標方法指定不同的事務屬性 64 <tx:attributes> 65 name指定該事務屬性對應的方法 propagation指事務的傳播特性 read-only只讀 66 <tx:method name="add*" propagation="REQUIRED" /> 67 <tx:method name="save*" propagation="REQUIRED" /> 68 <tx:method name="delete*" propagation="REQUIRED" /> 69 <tx:method name="modeif*" propagation="REQUIRED" /> 70 <tx:method name="update*" propagation="REQUIRED" /> 71 <tx:method name="get*" propagation="SUPPORTS" read-only="true" /> 72 <tx:method name="query*" propagation="SUPPORTS" read-only="true" /> 73 <tx:method name="search*" propagation="SUPPORTS" read-only="true" /> 74 <tx:method name="*" propagation="SUPPORTS" read-only="true" /> 75 </tx:attributes> 76 </tx:advice> --> 77 78 <!-- 定義事務處理的AOP切面 --> 79 <aop:config> 80 <aop:advisor advice-ref="txAdvice" 81 pointcut="execution(* com.zhidi.service..*.*(..))" /> 82 </aop:config> 83 84 </beans>View Code
6.properties
1 jdpc.driverClass=com.mysql.jdbc.Driver 2 jdpc.url=jdbc:mysql://localhost:3306/db_hibernate 3 jdpc.userName=root 4 jdpc.password=775297View Code
1 ### direct log messages to stdout ### 2 log4j.appender.stdout=org.apache.log4j.ConsoleAppender 3 log4j.appender.stdout.Target=System.out 4 log4j.appender.stdout.layout=org.apache.log4j.PatternLayout 5 log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n 6 7 ### direct messages to file hibernate.log ### 8 #log4j.appender.file=org.apache.log4j.FileAppender 9 #log4j.appender.file.File=hibernate.log 10 #log4j.appender.file.layout=org.apache.log4j.PatternLayout 11 #log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n 12 13 ### set log levels - for more verbose logging change ‘info‘ to ‘debug‘ ### 14 15 log4j.rootLogger=warn, stdout 16 17 #log4j.logger.org.hibernate=info 18 log4j.logger.org.hibernate=debug 19 20 ### log HQL query parser activity 21 #log4j.logger.org.hibernate.hql.ast.AST=debug 22 23 ### log just the SQL 24 #log4j.logger.org.hibernate.SQL=debug 25 26 ### log JDBC bind parameters ### 27 log4j.logger.org.hibernate.type=info 28 #log4j.logger.org.hibernate.type=debug 29 30 ### log schema export/update ### 31 log4j.logger.org.hibernate.tool.hbm2ddl=debug 32 33 ### log HQL parse trees 34 #log4j.logger.org.hibernate.hql=debug 35 36 ### log cache activity ### 37 #log4j.logger.org.hibernate.cache=debug 38 39 ### log transaction activity 40 #log4j.logger.org.hibernate.transaction=debug 41 42 ### log JDBC resource acquisition 43 #log4j.logger.org.hibernate.jdbc=debug 44 45 ### enable the following line if you want to track down connection ### 46 ### leakages when using DriverManagerConnectionProvider ### 47 #log4j.logger.org.hibernate.connection.DriverManagerConnectionProvider=traceView Code
聲明式事務管理