java.lang.NoClassDefFoundError: javax/transaction/SystemException
 at org.hibernate.ejb.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:112)
 at org.hibernate.ejb.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:107)
 at com.rfcyber.rfcepayment.util.jpa.JPAHelper.getEntityManager(Unknown Source)
 at com.rfcyber.rfcepayment.util.jpa.JPADAO.findByJPQL(Unknown Source)
 at com.richhouse.personal.service.DPZYTService.searchNextAvaiable(Unknown Source)
 at com.richhouse.personal.util.ZYTDPHandler.searchNextAvaiable(Unknown Source)
 at com.richhouse.personal.util.ZYTDataPreparation.prepareStoreData(Unknown Source)
 at test.TestDataPreparation.testOracleSearchNext(TestDataPreparation.java:91)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:597)
 at junit.framework.TestCase.runTest(TestCase.java:164)
 at junit.framework.TestCase.runBare(TestCase.java:130)
 at junit.framework.TestResult$1.protect(TestResult.java:106)
 at junit.framework.TestResult.runProtected(TestResult.java:124)
 at junit.framework.TestResult.run(TestResult.java:109)
 at junit.framework.TestCase.run(TestCase.java:120)
 at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
 at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.ClassNotFoundException: javax.transaction.SystemException
 at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
 at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
 at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
 ... 24 more 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd" [
<!ENTITY contextInclude SYSTEM "org/springframework/web/context/WEB-INF/contextInclude.xml">
]>

<beans>
 
 <import resource="classpath*:com/zyh/web/controller/spring/springAnnotation-import.xml"/>
</beans>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd" [
<!ENTITY contextInclude SYSTEM "org/springframework/web/context/WEB-INF/contextInclude.xml">
]>

<beans>
 <bean id="userDao" class="com.zyh.web.controller.dao.UserDAO">
  <property name="sessionFactory" ref="sessionFactory"></property>
 </bean>
 
 <bean id="userManagerBase" class="com.zyh.web.controller.service.UserManager">
  <property name="userDao" ref="userDao"></property>
 </bean>
 
 <bean id="userManager" parent="transactionBese">
  <property name="target" ref="userManagerBase"></property>
 </bean>
 
</beans>

对应关于就已经配置在容器里面了。
（2.1）查看springAnnotation-hibernate.xml（配置数据源，sessionFactory，和事物）

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd" [
<!ENTITY contextInclude SYSTEM "org/springframework/web/context/WEB-INF/contextInclude.xml">
]>

<beans>
 <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
  <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
  <property name="url" value="jdbc:mysql://localhost/test1?useUnicode=true"/>
  <property name="username" value="root"/>
  <property name="password" value="root"/>
 </bean>
 
 <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
  <property name="dataSource" ref="dataSource"/>
  <property name="hibernateProperties">
   <props>
    <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop>
    <prop key="hibernate.hbm2ddl.auto">update</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hiberante.format_sql">true</prop>
   </props>
  </property>
  <property name="configLocations">
   <list>
    <value>
     classpath*:com/zyh/web/controller/hibernate/hibernate.cfg.test.xml
    </value>
   </list>
  </property>
 </bean>
 
 <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
  <property name="sessionFactory" ref="sessionFactory"></property>
 </bean>
 
 <bean id="transactionBese" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" lazy-init="true" abstract="true">
  <property name="transactionManager" ref="transactionManager"></property>
  <property name="transactionAttributes">
   <props>
    <prop key="add*">PROPAGATION_REQUIRED,-Exception</prop>
    <prop key="update*">PROPAGATION_REQUIRED,-Exception</prop>
    <prop key="insert*">PROPAGATION_REQUIRED,-Exception</prop>
    <prop key="modify*">PROPAGATION_REQUIRED,-Exception</prop>
    <prop key="delete*">PROPAGATION_REQUIRED,-Exception</prop>
    <prop key="get*">PROPAGATION_NEVER</prop>
   </props>
  </property>
 </bean>
</beans>

 配置的对应的 classpath*:com/zyh/web/controller/hibernate/hibernate.cfg.test.xml
    

（3）springAnnotation-servlet.xml，内容如下

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" 
 xmlns:context="http://www.springframework.org/schema/context" 
 xmlns:p="http://www.springframework.org/schema/p" 
 xmlns:mvc="http://www.springframework.org/schema/mvc" 
 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-3.0.xsd 
      http://www.springframework.org/schema/context 
      http://www.springframework.org/schema/context/spring-context.xsd 
      http://www.springframework.org/schema/mvc 
      http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
     <!-- 注解扫描包 -->
 <context:component-scan base-package="com.zyh.web.controller" />
 <!-- 开启注解 -->
 
 <mvc:annotation-driven/>
 
 <!-- <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
 <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"></bean> -->
 <!-- 静态资源访问 -->
  <mvc:resources location="/img/" mapping="/img/**"/> 
  <mvc:resources location="/js/" mapping="/js/**"/>  
 

 <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
  <property name="prefix" value="/"></property>
  <property name="suffix" value=".jsp"></property>
 </bean>
 
 <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="defaultEncoding" value="utf-8" />
       <property name="maxUploadSize" value="10485760000" />
       <property name="maxInMemorySize" value="40960" />
 </bean>
 </beans> 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" 
xmlns:context="http://www.springframework.org/schema/context" 
xmlns:p="http://www.springframework.org/schema/p" 
xmlns:mvc="http://www.springframework.org/schema/mvc" 
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-3.0.xsd 
      http://www.springframework.org/schema/context 
      http://www.springframework.org/schema/context/spring-context.xsd 
      http://www.springframework.org/schema/mvc 
      http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
     <!-- 注解扫描包 -->
<context:component-scan base-package="com.zyh.web.controller" />
<!-- 开启注解 -->

<mvc:annotation-driven/>

<!-- <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"></bean> -->
<!-- 静态资源访问 -->
  <mvc:resources location="/img/" mapping="/img/**"/> 
  <mvc:resources location="/js/" mapping="/js/**"/>  

<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
  <property name="prefix" value="/"></property>
  <property name="suffix" value=".jsp"></property>
</bean>

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="defaultEncoding" value="utf-8" />
       <property name="maxUploadSize" value="10485760000" />
       <property name="maxInMemorySize" value="40960" />
</bean>
</beans> 

springAnnotation-hibernate.xml<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd" [
<!ENTITY contextInclude SYSTEM "org/springframework/web/context/WEB-INF/contextInclude.xml">
]>

<beans>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
  <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
  <property name="url" value="jdbc:mysql://localhost/test1?useUnicode=true"/>
  <property name="username" value="root"/>
  <property name="password" value="root"/>
</bean>

<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
  <property name="dataSource" ref="dataSource"/>
  <property name="hibernateProperties">
   <props>
    <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop>
    <prop key="hibernate.hbm2ddl.auto">update</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hiberante.format_sql">true</prop>
   </props>
  </property>
  <property name="configLocations">
   <list>
    <value>
     classpath*:com/zyh/web/controller/hibernate/hibernate.cfg.test.xml
    </value>
   </list>
  </property>
</bean>

<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
  <property name="sessionFactory" ref="sessionFactory"></property>
</bean>

<bean id="transactionBese" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" lazy-init="true" abstract="true">
  <property name="transactionManager" ref="transactionManager"></property>
  <property name="transactionAttributes">
   <props>
    <prop key="add*">PROPAGATION_REQUIRED,-Exception</prop>
    <prop key="update*">PROPAGATION_REQUIRED,-Exception</prop>
    <prop key="insert*">PROPAGATION_REQUIRED,-Exception</prop>
    <prop key="modify*">PROPAGATION_REQUIRED,-Exception</prop>
    <prop key="delete*">PROPAGATION_REQUIRED,-Exception</prop>
    <prop key="get*">PROPAGATION_NEVER</prop>
   </props>
  </property>
</bean>
</beans>

这个写的有点乱，理清思路，其实很简单，就是配置spring容器,里面扫描了所有的bean及一些依赖关系，hibernate配置数据源建立数据库连接，SessionFactory用于管理数据库，还有就是Springmvc用于控制视图与后台之间的页面转向，传递数据，发送请求。
配置工作就到此结束，然后就是写bean,dao,service,control与联系配置文件的对应关系，实际开发中当然不会把配置文件都写好才来写java代码。我的做法是同时进行，漏了就相应的加上。

-----------------------------------------------------------3对应的实现--------------------------------------
3.1 为了简单，我们建立一个单表的添删改查，就一个对象吧User，对应的表T_User,里面有userName和age两个属性，当然还要建立一个主键id,如下列代码所示:
com.zyh.web.controller.entity.User

package com.zyh.web.controller.entity;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

import org.hibernate.annotations.GenericGenerator;

@Entity
@Table(name="T_USER")
public class User {

 @GeneratedValue(generator = "system-uuid") 
    @GenericGenerator(name = "system-uuid", strategy = "uuid")
    @Column(length=32)
 @Id
 private String id;
 
 @Column(length=32)
 private String userName;
 
 @Column(length=32)
 private String age;
 
 public String getId() {
  return id;
 }
 public void setId(String id) {
  this.id = id;
 }
 public String getUserName() {
  return userName;
 }
 public void setUserName(String userName) {
  this.userName = userName;
 }
 public String getAge() {
  return age;
 }
 public void setAge(String age) {
  this.age = age;
 }

}
3.2 dao层结构如下：接口IUserDAO与实现类UserDAO，我们实现添删改查，查询包括一个User和所以User
com.zyh.web.controller.dao.IUserDAO

package com.zyh.web.controller.dao;

import java.util.List;

import com.zyh.web.controller.entity.User;

public interface IUserDAO {

 public void addUser(User user);
 
 public List<User> getAllUser();
 
 public User getUser(String id);
 
 public boolean delUser(String id);
 
 public boolean updateUser(User user);
}
实现类UserDAO:

package com.zyh.web.controller.dao;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.SessionFactory;

import com.zyh.web.controller.entity.User;

public class UserDAO implements IUserDAO {

 private SessionFactory sessionFactory;
 public void setSessionFactory(SessionFactory sessionFactory) {
  this.sessionFactory = sessionFactory;
 }

 @Override
 public void addUser(User user) {
  // TODO Auto-generated method stub
  sessionFactory.getCurrentSession().save(user);
 }

 @Override
 public List<User> getAllUser() {
  // TODO Auto-generated method stub
  String hql = "from User";
  Query query =  sessionFactory.getCurrentSession().createQuery(hql);
  return query.list();
 }

 @Override
 public User getUser(String id) {
  // TODO Auto-generated method stub
  String hql = "from User u where u.id=?";
  Query query = sessionFactory.getCurrentSession().createQuery(hql);
  query.setString(0, id);
  return (User) query.uniqueResult();
 }

 @Override
 public boolean delUser(String id) {
  // TODO Auto-generated method stub
  String hql = "delete User u where u.id=?";
  Query query = sessionFactory.getCurrentSession().createQuery(hql);
  query.setString(0, id);
  return (query.executeUpdate()>0);
 }

 @Override
 public boolean updateUser(User user) {
  // TODO Auto-generated method stub
  String hql = "update User u set u.userName=?,u.age=? where u.id=?";
  Query query = sessionFactory.getCurrentSession().createQuery(hql);
  query.setString(0, user.getUserName());
  query.setString(1, user.getAge());
  query.setString(2, user.getId());
  return (query.executeUpdate()>0);
 }

}

3.3 service层结构如下：接口IUserManager与实现类UserManager，我们实现添删改查，查询包括一个User和所以User
com.zyh.web.controller.service.IUserManager

package com.zyh.web.controller.service;

import java.util.List;

import com.zyh.web.controller.entity.User;

public interface IUserManager {
 
 public void addUser(User user);
 
 public List<User> getAllUser();
 
 public boolean delUser(String id);
 
 public User getUser(String id);
 
 public boolean updateUser(User user);
}
实现类UserManager.java

package com.zyh.web.controller.service;

import java.util.List;

import com.zyh.web.controller.dao.IUserDAO;
import com.zyh.web.controller.entity.User;

public class UserManager implements IUserManager {
 
 private IUserDAO userDao;
 
 public void setUserDao(IUserDAO userDao) {
  this.userDao = userDao;
 }

 @Override
 public void addUser(User user) {
  // TODO Auto-generated method stub
  userDao.addUser(user);
 }

 @Override
 public List<User> getAllUser() {
  // TODO Auto-generated method stub
  return userDao.getAllUser();
 }

 @Override
 public boolean delUser(String id) {
  // TODO Auto-generated method stub
  return userDao.delUser(id);
 }

 @Override
 public User getUser(String id) {
  // TODO Auto-generated method stub
  return userDao.getUser(id);
 }

 @Override
 public boolean updateUser(User user) {
  // TODO Auto-generated method stub
  return userDao.updateUser(user);
 }

}

4.Control层结构如下：实现类UserController.java，代码如下：

package com.zyh.web.controller;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.zyh.web.controller.entity.User;
import com.zyh.web.controller.service.IUserManager;

@Controller
@RequestMapping("/user")
public class UserController {
 @Resource(name="userManager")
 private IUserManager userManager;
 
 @RequestMapping("/toAddUser")
 public String toAddUser(){
  return "/addUser";
 }
 
 @RequestMapping("/addUser")
 public String addUser(User user){
  userManager.addUser(user);
  return "redirect:/user/getAllUser";
 }
 
 @RequestMapping("/getAllUser")
 public String getAllUser(HttpServletRequest request){
  List<User> user = userManager.getAllUser();
  request.setAttribute("user", user);
  return "/userManager";
 }
 
 @RequestMapping("/delUser")
 public void delUser(String id,HttpServletResponse response){
  String result = "{\"result\":\"error\"}";
  if(userManager.delUser(id)){
   result = "{\"result\":\"success\"}";
  }
  response.setContentType("application/json");
  PrintWriter pw;
  try {
   pw = response.getWriter();
   pw.write(result);
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }
 
 @RequestMapping("/getUser")
 public String getUser(String id,HttpServletRequest request){
  User user = userManager.getUser(id);
  request.setAttribute("user", user);
  return "editUser";
 }
 
 @RequestMapping("/updateUser")
 public String updateUser(User user,HttpServletRequest request){
  if(userManager.updateUser(user)){
   userManager.getUser(user.getId());
   request.setAttribute("user", user);
   return "/editUser";
  }else{
   return "/error";
  }
 }
}

 

--

package com.zyh.web.controller;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.zyh.web.controller.entity.User;
import com.zyh.web.controller.service.IUserManager;

@Controller
@RequestMapping("/user")
public class UserController {
 @Resource(name="userManager")
 private IUserManager userManager;
 
 @RequestMapping("/toAddUser")
 public String toAddUser(){
  return "/addUser";
 }
 
 @RequestMapping("/addUser")
 public String addUser(User user){
  userManager.addUser(user);
  return "redirect:/user/getAllUser";
 }
 
 @RequestMapping("/getAllUser")
 public String getAllUser(HttpServletRequest request){
  List<User> user = userManager.getAllUser();
  request.setAttribute("user", user);
  return "/userManager";
 }
 
 @RequestMapping("/delUser")
 public void delUser(String id,HttpServletResponse response){
  String result = "{\"result\":\"error\"}";
  if(userManager.delUser(id)){
   result = "{\"result\":\"success\"}";
  }
  response.setContentType("application/json");
  PrintWriter pw;
  try {
   pw = response.getWriter();
   pw.write(result);
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }
 
 @RequestMapping("/getUser")
 public String getUser(String id,HttpServletRequest request){
  User user = userManager.getUser(id);
  request.setAttribute("user", user);
  return "editUser";
 }
 
 @RequestMapping("/updateUser")
 public String updateUser(User user,HttpServletRequest request){
  if(userManager.updateUser(user)){
   userManager.getUser(user.getId());
   request.setAttribute("user", user);
   return "/editUser";
  }else{
   return "/error";
  }
 }
}

package com.zyh.web.controller.service;

import java.util.List;

import com.zyh.web.controller.dao.IUserDAO;
import com.zyh.web.controller.entity.User;

public class UserManager implements IUserManager {
 
 private IUserDAO userDao;
 
 public void setUserDao(IUserDAO userDao) {
  this.userDao = userDao;
 }

 @Override
 public void addUser(User user) {
  // TODO Auto-generated method stub
  userDao.addUser(user);
 }

 @Override
 public List<User> getAllUser() {
  // TODO Auto-generated method stub
  return userDao.getAllUser();
 }

 @Override
 public boolean delUser(String id) {
  // TODO Auto-generated method stub
  return userDao.delUser(id);
 }

 @Override
 public User getUser(String id) {
  // TODO Auto-generated method stub
  return userDao.getUser(id);
 }

 @Override
 public boolean updateUser(User user) {
  // TODO Auto-generated method stub
  return userDao.updateUser(user);
 }

}

--

package com.zyh.web.controller.service;

import java.util.List;

import com.zyh.web.controller.entity.User;

public interface IUserManager {
 
 public void addUser(User user);
 
 public List<User> getAllUser();
 
 public boolean delUser(String id);
 
 public User getUser(String id);
 
 public boolean updateUser(User user);
}

package com.zyh.web.controller.dao;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.SessionFactory;

import com.zyh.web.controller.entity.User;

public class UserDAO implements IUserDAO {

 private SessionFactory sessionFactory;
 public void setSessionFactory(SessionFactory sessionFactory) {
  this.sessionFactory = sessionFactory;
 }

 @Override
 public void addUser(User user) {
  // TODO Auto-generated method stub
  sessionFactory.getCurrentSession().save(user);
 }

 @Override
 public List<User> getAllUser() {
  // TODO Auto-generated method stub
  String hql = "from User";
  Query query =  sessionFactory.getCurrentSession().createQuery(hql);
  return query.list();
 }

 @Override
 public User getUser(String id) {
  // TODO Auto-generated method stub
  String hql = "from User u where u.id=?";
  Query query = sessionFactory.getCurrentSession().createQuery(hql);
  query.setString(0, id);
  return (User) query.uniqueResult();
 }

 @Override
 public boolean delUser(String id) {
  // TODO Auto-generated method stub
  String hql = "delete User u where u.id=?";
  Query query = sessionFactory.getCurrentSession().createQuery(hql);
  query.setString(0, id);
  return (query.executeUpdate()>0);
 }

 @Override
 public boolean updateUser(User user) {
  // TODO Auto-generated method stub
  String hql = "update User u set u.userName=?,u.age=? where u.id=?";
  Query query = sessionFactory.getCurrentSession().createQuery(hql);
  query.setString(0, user.getUserName());
  query.setString(1, user.getAge());
  query.setString(2, user.getId());
  return (query.executeUpdate()>0);
 }

}

package com.zyh.web.controller.dao;

import java.util.List;

import com.zyh.web.controller.entity.User;

public interface IUserDAO {

 public void addUser(User user);
 
 public List<User> getAllUser();
 
 public User getUser(String id);
 
 public boolean delUser(String id);
 
 public boolean updateUser(User user);
}

--

package com.zyh.web.controller.entity;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

import org.hibernate.annotations.GenericGenerator;

@Entity
@Table(name="T_USER")
public class User {

 @GeneratedValue(generator = "system-uuid") 
    @GenericGenerator(name = "system-uuid", strategy = "uuid")
    @Column(length=32)
 @Id
 private String id;
 
 @Column(length=32)
 private String userName;
 
 @Column(length=32)
 private String age;
 
 public String getId() {
  return id;
 }
 public void setId(String id) {
  this.id = id;
 }
 public String getUserName() {
  return userName;
 }
 public void setUserName(String userName) {
  this.userName = userName;
 }
 public String getAge() {
  return age;
 }
 public void setAge(String age) {
  this.age = age;
 }

}

--

 * @param bytes

 * @param opts

 * @return Bitmap

 */

 public static Bitmap getPicFromBytes(byte[] bytes, BitmapFactory.Options opts) {

     if (bytes != null)

        if (opts != null) 
             return BitmapFactory.decodeByteArray(bytes, 0, bytes.length,  opts); 
        else

            return BitmapFactory.decodeByteArray(bytes, 0, bytes.length); 
     return null;

}

这里我们主要来介绍一个BitmapFactory.Options这个类
    

BitmapFactory.Options这个类的详解如下：

这个表格是从android sdk文档里摘出来的，简单看一下说明就明白是什么意思了。
下面我们回到我们的主题上来：怎样获取图片的大小？
思路很简单：
首先我们把这个图片转成Bitmap，然后再利用Bitmap的getWidth()和getHeight()方法就可以取到图片的宽高了。
新问题又来了，在通过BitmapFactory.decodeFile(String path)方法将突破转成Bitmap时，遇到大一些的图片，我们经常会遇到OOM(Out Of Memory)的问题。怎么避免它呢？
这就用到了我们上面提到的BitmapFactory.Options这个类。

BitmapFactory.Options这个类，有一个字段叫做 inJustDecodeBounds 。SDK中对这个成员的说明是这样的：
If set to true, the decoder will return null (no bitmap), but the out…
也就是说，如果我们把它设为true，那么BitmapFactory.decodeFile(String path, Options opt)并不会真的返回一个Bitmap给你，它仅仅会把它的宽，高取回来给你，这样就不会占用太多的内存，也就不会那么频繁的发生OOM了。
示例代码如下：

这段代码之后，options.outWidth 和 options.outHeight就是我们想要的宽和高了。

有了宽，高的信息，我们怎样在图片不变形的情况下获取到图片指定大小的缩略图呢？
比如我们需要在图片不变形的前提下得到宽度为200的缩略图。
那么我们需要先计算一下缩放之后，图片的高度是多少

这样虽然我们可以得到我们期望大小的ImageView
但是在执行BitmapFactory.decodeFile(path, options);时，并没有节约内存。要想节约内存，还需要用到BitmapFactory.Options这个类里的 inSampleSize 这个成员变量。
我们可以根据图片实际的宽高和我们期望的宽高来计算得到这个值。

另外，为了节约内存我们还可以使用下面的几个字段：

     public void doSome();
     public void exectueMethod();
}

第二部分：在一个类里面把它当做参数并用到该参数
如下所示：

public class MethodB {

     public double getTime(CallBackInterface callBack){
          long start = System.currentTimeMillis();
          callBack.exectueMethod();
          long end = System.currentTimeMillis();
          System.out.println("cost time="+(end-start));
          return end-start;
     }
}

第三部分：在另外一个类里面调用到getTime方法并实现回调函数
如下所示:

public class MethodA {

     public static void main(String[] args) {
          MethodB b = new MethodB();
          double d = b.getTime(new CallBackInterface() {
         @Override
           public void exectueMethod() {
                // TODO Auto-generated method stub
                new MethodA().testMethod();
           }
   
           @Override
           public void doSome() {
                // TODO Auto-generated method stub
           }
          });
          System.out.println("d="+d);
     }
     public void testMethod(){
          for(int i=0;i<10000;i++)
           System.out.print("");
     }
}

输出结果：

cost time=31
d=31.0

理解“回调函数”

所谓回调，就是客户程序CLIENT调用服务程序SERVER中的某个函数SA，然后SERVER又在某个时候反过来调用CLIENT中的某个函数CB，对于CLIENT来说，这个CB便叫做回调函数。例如Win32下的窗口过程函数就是一个典型的回调函数。 
一般说来，CLIENT不会自己调用CB，CLIENT提供CB的目的就是让SERVER来调用它，而且是CLIENT不得不提供。由于SERVER并不知道CLIENT提供的CB叫甚名谁，所以SERVER会约定CB的接口规范（函数原型），然后由CLIENT提前通过SERVER的一个函数R告诉SERVER自己将要使用CB函数，这个过程称为回调函数的注册，R称为注册函数。Web SERVERerviCliente以及Java的RMI都用到回调机制，可以访问远程服务器程序。 

下面举个通俗的例子： 
某天，我打电话向你请教问题，当然是个难题，:)，你一时想不出解决方法，我又不能拿着电话在那里傻等，于是我们约定：等你想出办法后打手机通知我，这样，我就挂掉电话办其它事情去了。过了XX分钟，我的手机响了，你兴高采烈的说问题已经搞定，应该如此这般处理。故事到此结束。这个例子说明了“异步＋回调”的编程模式。其中，你后来打手机告诉我结果便是一个“回调”过程；我的手机号码必须在以前告诉你，这便是注册回调函数；我的手机号码应该有效并且手机能够接收到你的呼叫，这是回调函数必须符合接口规范。 
通过上面个人感觉到回调函数更多的应用就是结合异步。比如：ajax中jServer通过组件和服务器的异步通信。 

什么是回调函数 

精妙比喻:回调函数还真有点像您随身带的BP机：告诉别人号码，在它有事情时Call您 
回调用于层间协作，上层将本层函数安装在下层，这个函数就是回调，而下层在一定条件下触发回调，例如作为一个驱动，是一个底层，他在收到一个数据时，除了完成本层的处理工作外，还将进行回调，将这个数据交给上层应用层来做进一步处理，这在分层的数据通信中很普遍。 
其实回调和API非常接近，他们的共性都是跨层调用的函数。但区别是API是低层提供给高层的调用，一般这个函数对高层都是已知的；而回调正好相反，他是高层提供给底层的调用，对于低层他是未知的，必须由高层进行安装，这个安装函数其实就是一个低层提供的API，安装后低层不知道这个回调的名字，但它通过一个函数指针来保存这个回调，在需要调用时，只需引用这个函数指针和相关的参数指针。

其实：回调就是该函数写在高层，低层通过一个函数指针保存这个函数，在某个事件的触发下，低层通过该函数指针调用高层那个函数。

【参考】

http://blog.csdn.net/sweetwxh/article/details/2067139

http://liutiemeng.blog.51cto.com/120361/18874

http://kidult.iteye.com/blog/148982

public static void main(String[] args) {
  MethodB b = new MethodB();
  double d = b.getTime(new CallBackInterface() {
   
   @Override
   public void exectueMethod() {
    // TODO Auto-generated method stub
    new MethodA().testMethod();
   }
   
   @Override
   public void doSome() {
    // TODO Auto-generated method stub
    
   }
  });
  System.out.println("d="+d);
 }
 public void testMethod(){
  for(int i=0;i<10000;i++)
   System.out.print("");
 }

<%@ page language="java" contentType="text/html; charset=gbk"
    pageEncoding="gbk"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html> 
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gbk">
</head>

      <body>
          sitemesh的例<hr>
     </body>
</html>

Xml代码

1. <?xml version='1.0' encoding='utf-8'?> 
2.  
3. <Context> 
4.  
5.     <Resource name="jdbc/mysql"    
6.        auth="Container"    
7.        type="javax.sql.DataSource"    
8.        driverClassName="com.mysql.jdbc.Driver"    
9.        url="jdbc:mysql://localhost/bbs"    
10.        username="root"    
11.        password="root"    
12.        maxActive="50"    
13.        maxIdle="20"    
14.        maxWait="10000" />    
15.  
16. </Context> 

<?xml version='1.0' encoding='utf-8'?>

<Context>

    <Resource name="jdbc/mysql"   
       auth="Container"   
       type="javax.sql.DataSource"   
       driverClassName="com.mysql.jdbc.Driver"   
       url="jdbc:mysql://localhost/bbs"   
       username="root"   
       password="root"   
       maxActive="50"   
       maxIdle="20"   
       maxWait="10000" />   

</Context>

Xml代码

1. <resource-ref> 
2.     <description>DB Connection</description> 
3.     <res-ref-name>jdbc/mysql</res-ref-name> 
4.     <res-type>javax.sql.DataSource</res-type> 
5.     <res-auth>Container</res-auth> 
6. </resource-ref> 

  <resource-ref>
      <description>DB Connection</description>
      <res-ref-name>jdbc/mysql</res-ref-name>
      <res-type>javax.sql.DataSource</res-type>
      <res-auth>Container</res-auth>
  </resource-ref>

Java代码

1. package xushun.util; 
2.  
3. import java.sql.*; 
4. import javax.sql.*; 
5. import javax.naming.*; 
6.  
7. public class DBHelper { 
8.      
9.     public static Connection getConnection() throws SQLException,NamingException 
10.     { 
11.         // 初始化查找命名空间 
12.         Context initContext = new InitialContext(); 
13.         Context envContext = (Context)initContext.lookup("java:/comp/env"); 
14.         // 找到DataSource 
15.         DataSource ds = (DataSource)envContext.lookup("jdbc/mysql"); 
16.         return ds.getConnection(); 
17.     } 
18. } 

package xushun.util;

import java.sql.*;
import javax.sql.*;
import javax.naming.*;

public class DBHelper {
    
    public static Connection getConnection() throws SQLException,NamingException
    {
        // 初始化查找命名空间
        Context initContext = new InitialContext();
        Context envContext = (Context)initContext.lookup("java:/comp/env");
        // 找到DataSource
        DataSource ds = (DataSource)envContext.lookup("jdbc/mysql");
        return ds.getConnection();
    }
}

Xml代码

1. <GlobalNamingResources> 
2.   <!-- Editable user database that can also be used by 
3.        UserDatabaseRealm to authenticate users 
4.   --> 
5.   <Resource name="UserDatabase" auth="Container" 
6.             type="org.apache.catalina.UserDatabase" 
7.             description="User database that can be updated and saved" 
8.             factory="org.apache.catalina.users.MemoryUserDatabaseFactory" 
9.             pathname="conf/tomcat-users.xml" /> 
10. </GlobalNamingResources> 

  <GlobalNamingResources>
    <!-- Editable user database that can also be used by
         UserDatabaseRealm to authenticate users
    -->
    <Resource name="UserDatabase" auth="Container"
              type="org.apache.catalina.UserDatabase"
              description="User database that can be updated and saved"
              factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
              pathname="conf/tomcat-users.xml" />
  </GlobalNamingResources>

Xml代码

1. <GlobalNamingResources> 
2.   <!-- Editable user database that can also be used by 
3.        UserDatabaseRealm to authenticate users 
4.   --> 
5.   <Resource name="UserDatabase" auth="Container" 
6.             type="org.apache.catalina.UserDatabase" 
7.             description="User database that can be updated and saved" 
8.             factory="org.apache.catalina.users.MemoryUserDatabaseFactory" 
9.             pathname="conf/tomcat-users.xml" /> 
10.   <Resource name="jdbc/bbs"      
11.          auth="Container" type="javax.sql.DataSource" 
12.          driverClassName="com.mysql.jdbc.Driver" 
13.          maxIdle="20" 
14.          maxWait="5000" 
15.          username="root" 
16.          password="admin" 
17.          url="jdbc:mysql://localhost:3306/bbs"      
18.          maxActive="100"  
19.          removeAbandoned="true" 
20.          removeAbandonedTimeout="60" 
21.          logAbandoned="true"/> 
22. </GlobalNamingResources> 

  <GlobalNamingResources>
    <!-- Editable user database that can also be used by
         UserDatabaseRealm to authenticate users
    -->
    <Resource name="UserDatabase" auth="Container"
              type="org.apache.catalina.UserDatabase"
              description="User database that can be updated and saved"
              factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
              pathname="conf/tomcat-users.xml" />
    <Resource name="jdbc/bbs"     
	          auth="Container" type="javax.sql.DataSource"
	          driverClassName="com.mysql.jdbc.Driver"
	          maxIdle="20"
	          maxWait="5000"
	          username="root"
	          password="admin"
	          url="jdbc:mysql://localhost:3306/bbs"     
	          maxActive="100" 
	          removeAbandoned="true"
	          removeAbandonedTimeout="60"
	          logAbandoned="true"/>
  </GlobalNamingResources>

Xml代码

1. <ResourceLink name="jdbc/bbs" global="jdbc/bbs" type="javax.sql.DataSource"/> 

<ResourceLink name="jdbc/bbs" global="jdbc/bbs" type="javax.sql.DataSource"/>

Xml代码

1. <resource-ref> 
2.     <description>DB Connection</description> 
3.     <res-ref-name>jdbc/mysql</res-ref-name> 
4.     <res-type>javax.sql.DataSource</res-type> 
5.     <res-auth>Container</res-auth> 
6. </resource-ref> 

  <resource-ref>
      <description>DB Connection</description>
      <res-ref-name>jdbc/mysql</res-ref-name>
      <res-type>javax.sql.DataSource</res-type>
      <res-auth>Container</res-auth>
  </resource-ref>

Xml代码

1. <Resource name="jdbc/bbs"      
2.               auth="Container" type="javax.sql.DataSource" 
3.               driverClassName="com.mysql.jdbc.Driver" 
4.               maxIdle="20" 
5.               maxWait="5000" 
6.               username="root" 
7.               password="admin" 
8.               url="jdbc:mysql://localhost:3306/bbs"      
9.               maxActive="100"  
10.               removeAbandoned="true" 
11.               removeAbandonedTimeout="60" 
12.               logAbandoned="true"/> 

<Resource name="jdbc/bbs"     
	          auth="Container" type="javax.sql.DataSource"
	          driverClassName="com.mysql.jdbc.Driver"
	          maxIdle="20"
	          maxWait="5000"
	          username="root"
	          password="admin"
	          url="jdbc:mysql://localhost:3306/bbs"     
	          maxActive="100" 
	          removeAbandoned="true"
	          removeAbandonedTimeout="60"
	          logAbandoned="true"/>

Xml代码

1. <resource-ref> 
2.     <description>DB Connection</description> 
3.     <res-ref-name>jdbc/mysql</res-ref-name> 
4.     <res-type>javax.sql.DataSource</res-type> 
5.     <res-auth>Container</res-auth> 
6. </resource-ref> 

  <resource-ref>
      <description>DB Connection</description>
      <res-ref-name>jdbc/mysql</res-ref-name>
      <res-type>javax.sql.DataSource</res-type>
      <res-auth>Container</res-auth>
  </resource-ref>

eclipse Password required问题解决方法