Spring3.0.2 使用全Annotation 与 Hessian 兼容配置
之前使用Spring的BeanNameUrlHandlerMapping，对Hessian的处理是比较简单的,这里不多说了。
那么如果提供ResuFul 通过Spring的 Annotation功能呢？据我所知，Spring支持的Hessian目前还不支持Annotation配置。
好吧，想想有没有别的办法：
因为 Annotation 的 restful 需要启动这两个类：
< bean class ="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
< bean class ="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
这样的话，Spring就不再使用默认BeanNameUrlHandlerMapping，而是完全通过 DefaultAnnotationHandlerMapping 进行Mapping.
但据我所知，Hessian与Spring整合必须通过 org.springframework.remoting.caucho.HessianServiceExporter 进行兼容。
那么怎么将HessianServiceExporter Annotation呢？首先想到了使用反射，OK，没有问题，通过cglib一定可以做的。
第二，通知显性的定义 BeanNameUrlHandlerMapping, 之后再进行order,是不是也可以的。
我觉得第二种开发成本会小一些，那么使用第二种方式。
< bean class ="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" >
< property name ="order" value ="1" />
</ bean >
< bean class ="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" >
< property name ="order" value ="2" />
</ bean >
运行一下，还是不好用，哦～～原来的 AnnotationMethodHandlerAdapter 再捣鬼，它不支持Servlet方式，那么好吧，对于hessian的处理，使用org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter吧。这个肯定是好用的。
全部代码为：
web.xml:
< servlet >
< servlet-name > SillServlet </ servlet-name >
< servlet-class > org.springframework.web.servlet.DispatcherServlet </ servlet-class >
< init-param >
< param-name > contextConfigLocation </ param-name >
< param-value > /WEB-INF/applicationContext/mvc-config.xml,/WEB-INF/applicationContext/bean-hessian.xml </ param-value >
</ init-param >
< load-on-startup > 1 </ load-on-startup >
</ servlet >
< servlet-mapping >
< servlet-name > SillServlet </ servlet-name >
< url-pattern > /app/* </ url-pattern >
</ servlet-mapping >
mvc-config.xml:
<!-- Configures support for @Controllers -->
< mvc:annotation-driven />
<!-- 启动springmvc的注解映射功能 -->
< bean class ="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" >
< property name ="order" value ="1" />
</ bean >
<!-- Hessian 启动BeanNameMapping 映射功能 -->
< bean class ="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" >
< property name ="defaultHandler" ref ="httpRequestHandlerAdapter" />
< property name ="order" value ="2" />
</ bean >
<!-- 启动springmvc的注解功能 -->
< bean class ="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
<!-- 处理httpRequest的Adapter -->
< bean id ="httpRequestHandlerAdapter" class ="org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter" ></ bean >
<!-- spring 对 com.*.*.*.* 进行扫描 -->
< context:component-scan base-package ="com.*.*.*.*" />
bean-hessian.xml: 正常配置，HessianBean的配置没有变化
< bean name ="/hessianResultService" class ="org.springframework.remoting.caucho.HessianServiceExporter" >
< property name ="service" ref ="resultHessianService" />
< property name ="serviceInterface" value ="com.interface.*" />
</ bean >
< bean id ="resultHessianService" class ="com.interfaceimpl.*" />
< bean name ="/hessianConditionService" class ="org.springframework.remoting.caucho.HessianServiceExporter" >
< property name ="service" ref ="conditionHessianService" />
< property name ="serviceInterface" value ="com.interface.*" />
</ bean >
< bean id ="conditionHessianService" class ="com.interfaceimpl.*" />
RunTest,OK～！
重点回顾：
1.Hessian需要提供Servlet支撑，那么 AnnotationMethodHandlerAdapter 无法满足，需要使用 HttpRequestHandlerAdapter。
2.必须使用显性的BeanNameUrlHandlerMapping配置，否则可以使用SimpleUrlHandlerMapping,但是配置比较麻烦，维护成本比较高。
================================================================================
还有另外一种方式配置也可以使用（目前我就使用的这种方式）
Key: 使用不同的Servlet来处理Hessian请求与一般请求即可。
看下代码：
web.xml:
代码
<?
xml version="1.0" encoding="UTF-8"
?>
<
web-app
xmlns:xsi
="http://www.w3.org/2001/XMLSchema-instance"
xmlns
="http://java.sun.com/xml/ns/javaee"
xmlns:web
="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation
="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version
="2.5"
>
<
listener
>
<
listener-class
>
org.springframework.web.context.ContextLoaderListener
</
listener-class
>
</
listener
>
<!--
Reads request input using UTF-8 encoding
-->
<
filter
>
<
filter-name
>
characterEncodingFilter
</
filter-name
>
<
filter-class
>
org.springframework.web.filter.CharacterEncodingFilter
</
filter-class
>
<
init-param
>
<
param-name
>
encoding
</
param-name
>
<
param-value
>
UTF-8
</
param-value
>
</
init-param
>
<
init-param
>
<
param-name
>
forceEncoding
</
param-name
>
<
param-value
>
true
</
param-value
>
</
init-param
>
</
filter
>
<!--
Log4j 指定 Log4J 配置文件的地址
-->
<
context-param
>
<
param-name
>
log4jConfigLocation
</
param-name
>
<
param-value
>
/WEB-INF/log4j.properties
</
param-value
>
</
context-param
>
<
context-param
>
<
param-name
>
contextConfigLocation
</
param-name
>
<
param-value
>
classpath*:/spring-dao/spring-*.xml,/WEB-INF/applicationContext/applicationContext.xml
</
param-value
>
</
context-param
>
<
servlet
>
<
servlet-name
>
SillServlet
</
servlet-name
>
<
servlet-class
>
org.springframework.web.servlet.DispatcherServlet
</
servlet-class
>
<
init-param
>
<
param-name
>
contextConfigLocation
</
param-name
>
<
param-value
>
/WEB-INF/applicationContext/mvc-config.xml
</
param-value
>
</
init-param
>
</
servlet
>
<
servlet-mapping
>
<
servlet-name
>
SillServlet
</
servlet-name
>
<
url-pattern
>
/app/*
</
url-pattern
>
</
servlet-mapping
>
<
servlet
>
<
servlet-name
>
Remoting
</
servlet-name
>
<
servlet-class
>
org.springframework.web.servlet.DispatcherServlet
</
servlet-class
>
<
init-param
>
<
param-name
>
contextConfigLocation
</
param-name
>
<
param-value
>
/WEB-INF/applicationContext/bean-hessian.xml
</
param-value
>
</
init-param
>
</
servlet
>
<
servlet-mapping
>
<
servlet-name
>
Remoting
</
servlet-name
>
<
url-pattern
>
/remoting/*
</
url-pattern
>
</
servlet-mapping
>
</
web-app
>
mvc-config.xml:
代码
<?
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:mvc
="http://www.springframework.org/schema/mvc"
xmlns:context
="http://www.springframework.org/schema/context"
xmlns:p
="http://www.springframework.org/schema/p"
xmlns:util
="http://www.springframework.org/schema/util"
xsi:schemaLocation
="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd"
>
<
mvc:annotation-driven
/>
<
bean
class
="org.springframework.web.servlet.view.InternalResourceViewResolver"
>
<
property
name
="prefix"
value
="/WEB-INF/views/"
/>
<
property
name
="suffix"
value
=".jsp"
/>
</
bean
>
<!--
启动springmvc的注解映射功能
-->
<
bean
class
="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"
>
</
bean
>
<!--
只针对action包中的controller进行扫描
-->
<
context:component-scan
base-package
="com.*.*.action"
/>
<
context:annotation-config
/>
<!--
Application Message Bundle
-->
<
bean
id
="messageSource"
class
="org.springframework.context.support.ReloadableResourceBundleMessageSource"
>
<
property
name
="basenames"
>
<
list
>
<
value
>
/WEB-INF/messages/messages
</
value
>
<
value
>
/WEB-INF/messages/expMessages
</
value
>
<
value
>
/WEB-INF/messages/chartMessages
</
value
>
</
list
>
</
property
>
<
property
name
="cacheSeconds"
value
="-1"
/>
</
bean
>
</
beans
>
bean-hessian.xml:
代码
<?
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-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"
>
<!--
必要配置项
-->
<!--
扫描并加注HessianService 使用的bean
-->
<
context:annotation-config
/>
<!--
Hessian 启动BeanNameMapping 映射功能,以httpRequest作为处理Adapter
-->
<
bean
class
="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"
>
<
property
name
="defaultHandler"
ref
="httpRequestHandlerAdapter"
/>
</
bean
>
<!--
Hessian 方式以Http进行传递
-->
<
bean
id
="httpRequestHandlerAdapter"
class
="org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter"
/>
<!--
以下为业务Bean
-->
<!--
Hadoop计算完后 发布Result的 Remote Server
-->
<
bean
name
="/hessianResultService"
class
="org.springframework.remoting.caucho.HessianServiceExporter"
>
<
property
name
="service"
ref
="resultHessianService"
/>
<
property
name
="serviceInterface"
value
="com.*.*.remote.hessian.HessianResultService"
/>
</
bean
>
<
bean
id
="resultHessianService"
class
="com.*.*sill.job.service.export.HessianResultServiceHandler"
/>
<
bean
name
="/hessianConditionService"
class
="org.springframework.remoting.caucho.HessianServiceExporter"
>
<
property
name
="service"
ref
="conditionHessianService"
/>
<
property
name
="serviceInterface"
value
="com.*.*.remote.hessian.HessianConditionService"
/>
</
bean
>
<
bean
id
="conditionHessianService"
class
="com.*.*.sill.job.service.export.HessianConditionServiceHandler"
/>
</
beans
>
这样做的好处是可以进行分别处理HttpRequestHandlerAdapter 与 AnnotationMethodHandlerAdapter，不需要进行order控制，且有更大的灵活性。
对Hessian的增改与其他业务无关。
大家可以试试，如果有更好的方式请赐教～