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用Struts2实现在线银行付款

Jxi — Tue, 13 Oct 2009 10:27:00 GMT

摘要: &n... 阅读全文

Jxi 2009-10-13 18:27 发表评论

SSH基础搭徏

Jxi — Wed, 30 Sep 2009 07:29:00 GMT

Struts2+Hibernate3.0+Spring的基本搭�?非常基础�?

具体操作步骤截图见附�?源代码不包含lib�?:S2SH截图
除了操作的配�|�代�?
WEB-INF下的web.xml的配�|?

1 xml version="1.0" encoding="UTF-8"?>
2 <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
5     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
6
7     <filter>
8         <filter-name>strutsfilter-name>
9         <filter-class>
10             org.apache.struts2.dispatcher.FilterDispatcher
11         filter-class>
12     filter>
13
14
15     <filter-mapping>
16         <filter-name>strutsfilter-name>
17         <url-pattern>/*
18
19
20

contextConfigLocation

classpath:applicationContext.xml

23
24
25
26

org.springframework.web.context.ContextLoaderListener

27
28
29

index.jsp

31
32
33

applicationContext.xml:

1 xml version="1.0" encoding="UTF-8"?>
2 <beans
3     xmlns="http://www.springframework.org/schema/beans"
4     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
5     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
6
7
8 <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
9      <property name="location" value="/WEB-INF/jdbc.properties">property>
10 bean>
11
12 <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
13  destroy-method="close" >
14           <property name="driverClassName" value="${jdbc.driverClassName}">property>
15           <property name="url" value="${jdbc.url}">property>
16           <property name="username" value="${jdbc.username}">property>
17           <property name="password" value="${jdbc.password}">property>
18 bean>
19
20
21
22 <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
23 <property name="dataSource" ref="dataSource">property>
24
25 <property name="mappingResources">
26    <list>
27
28    list>
29
30 property>
31
32
33
34 <property name="hibernateProperties">
35      <props>
36           <prop key="hibernate.dialect">
37             ${hibernate.dialect}
38           prop>
39           <prop key="hibernate.show_sql">trueprop>
40           <prop key="hibernate.generate_satistices">trueprop>
41      props>
42 property>
43 bean>
44
45
46
47  <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
48     <property name="sessionFactory" ref="sessionFactory">property>
49  bean>
50
51
52
53 <bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
54    <property name="sessionFactory" ref="sessionFactory">property>
55 bean>
56
57
58 beans>

struts.xml:

1 xml version="1.0" encoding="UTF-8" ?>
2 DOCTYPE struts PUBLIC
3     "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
4     "http://struts.apache.org/dtds/struts-2.0.dtd">
5 <struts>
6
7
8
9
10 <constant name="struts.i18n.encoding" value="utf-8">constant>
11  <package name="struts2" extends="struts-default">
12
13
14
15
16  package>
17
18 struts>

hibernate.cfg.xml:什么都做，全交�l�Spring��理

1 xml version='1.0' encoding='UTF-8'?>
2 DOCTYPE hibernate-configuration PUBLIC
3           "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
4           "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
5
6
7 <hibernate-configuration>
8
9     <session-factory>
10
11     session-factory>
12
13 hibernate-configuration>

WEB-INF下的数据库配�|�文�?jdbc.properties

1 hibernate.dialect= org.hibernate.dialect.MySQLDialect
2 jdbc.driverClassName=com.mysql.jdbc.Driver
3 jdbc.url=jdbc\:mysql\://localhost\:3306/bookbooks
4 jdbc.username=root
5 jdbc.password=123456
6

Jxi 2009-09-30 15:29 发表评论

Spring @AspectJ

Jxi — Mon, 14 Sep 2009 12:01:00 GMT

准备工作:需�?nbsp; spring/lib/asm 下的3个包:asm.jar asm-commons.jar asm-util.jar
spring/lib/aspectj 下的2个包 aspectjrt.jar 和aspectjweaver.jar
使用@AspectJ的小例子:

public interface Company {
public void descript();
public void ss();
}

public class stockCompany implements Company{

    public void descript() {
        System.out.print("This is a stock market");
    }
    //另外��d��一个内嵌descript()的函�?nbsp;调用后不会拦截里面的descript函数
    public void ss(){
        System.out.println("在另外一个函数调用的");
        descript();
    }
}

import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;

@Aspect
public class PreDescriptAspect {
@Before("execution(* descript(..))")
public void beforeDescript(){
System.out.print("Here Is My Company Description!");
}
}

import org.springframework.aop.aspectj.annotation.AspectJProxyFactory;

public class stockCompanyTest {
public static void main(String[] args){
Company target=new stockCompany();
AspectJProxyFactory factory=new AspectJProxyFactory();
factory.setTarget(target);
factory.addAspect(PreDescriptAspect.class);
Company proxy=factory.getProxy();
proxy.descript();
proxy.ss();
}
}

Jxi 2009-09-14 20:01 发表评论

Spring AOP 学习�W�记

Jxi — Sun, 23 Aug 2009 14:52:00 GMT

AOP Aspect Oriented Programing 面向斚w��~�程
AOP 术语
�q�接�?(Joinpoint)    �E�序执行的特定位�|?�c�d��始初始化前、类初始化后、调用前后、异常抛出后)
切点:   (PointCut)     �E�序�c�M��客观存在的事物（�c�M��的方法）
增强 :  (Advice)        �|�入到目标类Joinpint的一�D�代�?br /> 目标对象:(Target)   引介(Introduction) �l�入(Weaving) 代理(Proxy) 切面(Aspect):切点和增强的�l�成

基础知识: Spring Aop :使用动态代理技术在�q�行期间�l�入增强代码
ProxyFactory 代理工厂采用JDK代理或CGLib代理技�?br /> JDK 动态代�?
1.定义UserService接口函数:

public interface UserService {
public void addUser(int id);
}

2.UserServiceImpl

public class UserServiceImpl implements UserService{
public void addUser(int id){
System.out.println("��d��一个用户中 �Q?/span>"+id);
}
}

3.ProxyHandler

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;

public class ProxyHandler implements InvocationHandler{
   private Object target;
   public  ProxyHandler(Object target){
       this.target=target;
   }

public Object invoke(Object proxy, Method method, Object[] args)
        throws Throwable {
       System.out.println("��d��用户�?/span>");
       Object obj=method.invoke(target,args);
       System.out.println("��d��用户�?/span>");
       return obj;
}
}

TestProxyHandler

import java.lang.reflect.Proxy;

public class ProxyHandlerTest {
  public static void main(String args[]){
      UserService target=new UserServiceImpl();
      ProxyHandler handler=new ProxyHandler(target);
      UserService proxy=(UserService)Proxy.newProxyInstance(
        target.getClass().getClassLoader(),
        target.getClass().getInterfaces(),
        handler);
      proxy.addUser(100);
  }
}

CGLib 代理:
AddUserService接口:

package CGlib.Text.Service;

public interface AddUserService {
public void addUser(int id);
}

AddUserServiceImpl 实现�c?

package CGlib.Text.Service;

public class AddUserServiceImpl implements AddUserService {

    public void addUser(int id) {
        System.out.println("��d��用户ID�?"+id);
    }
}

CglibProxy 代理�c?

package CGlib.Text.Service;

import java.lang.reflect.Method;

import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

public class CglibProxy implements MethodInterceptor{
    private Enhancer enhancer=new Enhancer();
    @SuppressWarnings("unchecked")
    public Object getProxy(Class clazz){
        enhancer.setSuperclass(clazz);
        enhancer.setCallback(this);
        return enhancer.create();
    }

    public Object intercept(Object obj, Method method, Object[] args,
            MethodProxy proxy) throws Throwable {
        System.out.println("��d��用户之前");
        System.out.print(method.getName());
        System.out.print(obj.getClass().getName()+"外加");
        System.out.print(args.getClass().getName());
        Object result=proxy.invokeSuper(obj, args);
        System.out.println("外加的参�?/span>"+args.toString());
        System.out.println("��d��用户之后");
        // TODO Auto-generated method stub
        return result;
    }


}

CglibProxyTest:��试�c?br />

package CGlib.Text.Service;

public class CglibProxyTest {
    public static void main(String[] args){
        CglibProxy proxy=new CglibProxy();
        AddUserServiceImpl userService=
            (AddUserServiceImpl)proxy.getProxy(AddUserServiceImpl.class);
      userService.addUser(100);
    }

}

对JDK动态代理和Cglib动态代理的理解�Q?br /> JDK 代理时性能高，但生成代理对象时�q�行性能较低
Cglib 代理时性能低，但生成代理对象时�q�行性能较高
所以：单例Singleton 旉��用CGLib代理�?br />

Jxi 2009-08-23 22:52 发表评论

Spring

Jxi — Sat, 25 Jul 2009 06:57:00 GMT

Spring

Important

Spring is an application framework. Unlike single-tier frameworks such as Struts or Hibernate, Spring aims to help structure whole applications in a consistent, productive manner, pulling together best-of-breed single-tier frameworks to create a coherent architecture.

Problems with the Traditional Approach to J2EE

传统J2EE�Ҏ��存在的问�?/span>

J2EE applications tend to contain excessive amounts of "plumbing" code.�?/span>
Many J2EE applications use a distributed object model where this is inappropriate.�?/span>
The EJB component model is unduly complex.不当
EJB is overused.�q�度使用
Many "J2EE design patterns" are not, in fact, design patterns, but workarounds for technology limitations.技术跟不上
J2EE applications are hard to unit test.��试�?/span>
Certain J2EE technologies have simply failed.

Enter Spring

接触Spring

Inversion of Control container:倒置控制
Aspect-Oriented Programming (AOP) framework:
Data access abstraction:
JDBC simplification:
Transaction management:
MVC web framework:
Simplification for working with JNDI, JTA, and other J2EE APIs:
Lightweight remoting:
JMS support:
JMX support:
Support for a comprehensive testing strategy for application developers:

The key Spring values can be summarized as follows:

· Spring is a non-invasive framework.非��R�?

· Spring provides a consistent programming model, usable in any environment.

· Spring aims to promote code reuse.复用

· Spring aims to facilitate Object Oriented design in J2EE applications.

· Spring aims to facilitate good programming practice, such as programming to interfaces, rather than classes.面向接口

· Spring promotes pluggability.性能

· Spring facilitates the extraction of configuration values from Java code into XML or properties files.

· Spring is designed so that applications using it are as easy as possible to test.

· Spring is consistent.

· Spring promotes architectural choice.

· Spring does not reinvent the wheel.

Jxi 2009-07-25 14:57 发表评论