SWF2入门(二)

参考:
1. http://www.ibm.com/developerworks/cn/education/java/j-spring-webflow/
2. http://docs.spring.io/spring-webflow/docs/2.4.2.RELEASE/reference/html/
还是前面这个例子,只是升级到Spring Web Flow 2.4.2,
一.xml配置
1./WEB-INF/dispatcher-servlet.xml

<?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:mvc="http://www.springframework.org/schema/mvc"
       xmlns:webflow="http://www.springframework.org/schema/webflow-config"
       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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/webflow-config http://www.springframework.org/schema/webflow-config/spring-webflow-config-2.4.xsd">

    <!--SPRING SERVICE-->
    <context:component-scan base-package="org.exam.service"/>

    <!--SPRING MVC-->
    <context:component-scan base-package="org.exam.web"/>
    <!-- Enables controllers mapped with @RequestMapping annotations, formatting annotations @NumberFormat @DateTimeFormat, and JSR 303 style validation -->
    <mvc:annotation-driven/>
    <!--  Enable serving of classpath with Spring 3 resource serving mechanism. For example: GET /webflow-showcase/resources/styles/blueprint/print.css -->
    <mvc:resources mapping="/static/**" location="/static/"/>
    <!-- Resolves views selected for rendering by @Controllers. resources in the /WEB-INF/views directory-->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <!--SPRING WEB FLOW-->
    <!-- Maps request paths to flows in the flowRegistry; e.g. a path of /hotels/booking looks for a flow with id "hotels/booking". -->
    <bean class="org.springframework.webflow.mvc.servlet.FlowHandlerMapping">
        <property name="flowRegistry" ref="flowRegistry"/>
        <property name="order" value="0"/>
    </bean>
    <!-- The registry of executable flow definitions  Flows will now be assigned registry identifiers equal to the the path segment between their base path and file name-->
    <webflow:flow-registry id="flowRegistry" flow-builder-services="flowBuilderServices" base-path="/WEB-INF">
        <webflow:flow-location-pattern value="/**/*-flow.xml" />
    </webflow:flow-registry>
    <!-- Plugs in a custom creator for Web Flow views -->
    <webflow:flow-builder-services id="flowBuilderServices" view-factory-creator="mvcViewFactoryCreator"/>
    <bean id="mvcViewFactoryCreator" class="org.springframework.webflow.mvc.builder.MvcViewFactoryCreator">
        <property name="viewResolvers" ref="viewResolver"/>
    </bean>
    <!-- Dispatches requests mapped to flows to FlowHandler implementations -->
    <bean class="org.springframework.webflow.mvc.servlet.FlowHandlerAdapter">
        <property name="flowExecutor" ref="flowExecutor"/>
    </bean>
    <!-- Executes flows: the entry point into the Spring Web Flow system -->
    <webflow:flow-executor id="flowExecutor"/>
</beans>

2./WEB-INF/order/shopping/shopping-flow.xml

<?xml version="1.0" encoding="UTF-8"?>
<flow xmlns="http://www.springframework.org/schema/webflow"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.springframework.org/schema/webflow http://www.springframework.org/schema/webflow/spring-webflow.xsd">

    <var name="mycart" class="org.exam.model.Cart"/>

    <on-start>
        <set name="conversationScope.cart" value="mycart"></set>
    </on-start>

    <view-state id="viewCart" view="order/viewCart">
        <on-render>
            <evaluate expression="productService.getProducts()" result="viewScope.products"/>
        </on-render>
        <transition on="submit" to="viewOrder"/>
        <transition on="addToCart" to="addProductToCart"/>
    </view-state>

    <subflow-state id="addProductToCart" subflow="order/addToCart">
        <transition on="productAdded" to="viewCart"/>
    </subflow-state>

    <view-state id="viewOrder" view="order/viewOrder">
        <transition on="confirm" to="orderConfirmed" />
    </view-state>

    <view-state id="orderConfirmed" view="order/orderConfirmed">
        <transition on="returnToIndex" to="returnToIndex" />
    </view-state>
    <end-state id="returnToIndex" view="externalRedirect:contextRelative:/"/>

</flow>

3./WEB-INF/order/addToCart/addToCart-flow.xml

<?xml version="1.0" encoding="UTF-8"?>
<flow xmlns="http://www.springframework.org/schema/webflow"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.springframework.org/schema/webflow http://www.springframework.org/schema/webflow/spring-webflow.xsd">

    <on-start>
        <set name="requestScope.productId" value="requestParameters.productId"/>
    </on-start>
    <action-state id="addToCart">
        <evaluate expression="cart.addItem(productService.getProduct(productId))"/>
        <transition to="productAdded"/>
    </action-state>
    <end-state id="productAdded"/>

</flow>

二.javaConfig方式
1.MvcConfig.java

package org.exam.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.multipart.MultipartResolver;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

/**
 * Created by xin on 15/1/7.
 */
@Configuration
@ComponentScan(basePackages = {"org.exam.service","org.exam.web"})
@EnableWebMvc
public class MvcConfig extends WebMvcConfigurerAdapter {
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/static/**").addResourceLocations("/static/");
    }

    @Bean
    public InternalResourceViewResolver viewResolver() {
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setPrefix("/WEB-INF/");
        resolver.setSuffix(".jsp");
        return resolver;
    }

    @Bean
    public MultipartResolver multipartResolver() {
        CommonsMultipartResolver bean = new CommonsMultipartResolver();
        bean.setDefaultEncoding("UTF-8");
        return bean;
    }

}

2.WebFlowConfig.java

package org.exam.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.webflow.config.AbstractFlowConfiguration;
import org.springframework.webflow.definition.registry.FlowDefinitionRegistry;
import org.springframework.webflow.engine.builder.support.FlowBuilderServices;
import org.springframework.webflow.executor.FlowExecutor;
import org.springframework.webflow.mvc.builder.MvcViewFactoryCreator;
import org.springframework.webflow.mvc.servlet.FlowHandlerAdapter;
import org.springframework.webflow.mvc.servlet.FlowHandlerMapping;

import java.util.Collections;

@Configuration
public class WebFlowConfig extends AbstractFlowConfiguration {

    @Autowired
    private MvcConfig webMvcConfig;

    @Bean
    public FlowHandlerMapping flowHandlerMapping() {
        FlowHandlerMapping handlerMapping = new FlowHandlerMapping();
        handlerMapping.setOrder(0);
        handlerMapping.setFlowRegistry(flowRegistry());
        return handlerMapping;
    }

    @Bean
    public FlowHandlerAdapter flowHandlerAdapter() {
        FlowHandlerAdapter handlerAdapter = new FlowHandlerAdapter();
        handlerAdapter.setFlowExecutor(flowExecutor());
        handlerAdapter.setSaveOutputToFlashScopeOnRedirect(true);
        return handlerAdapter;
    }

    @Bean
    public FlowExecutor flowExecutor() {
        return getFlowExecutorBuilder(flowRegistry()).build();
    }

    @Bean
    public FlowDefinitionRegistry flowRegistry() {
        return getFlowDefinitionRegistryBuilder(flowBuilderServices())
                .setBasePath("/WEB-INF").addFlowLocationPattern("/**/*-flow.xml").build();
    }

    @Bean
    public FlowBuilderServices flowBuilderServices() {
        return getFlowBuilderServicesBuilder()
                .setViewFactoryCreator(mvcViewFactoryCreator())
                .setValidator(validator())
                .setDevelopmentMode(true)
                .build();
    }

    @Bean
    public MvcViewFactoryCreator mvcViewFactoryCreator() {
        MvcViewFactoryCreator factoryCreator = new MvcViewFactoryCreator();
        factoryCreator.setViewResolvers(Collections.<ViewResolver>singletonList(this.webMvcConfig.viewResolver()));
        factoryCreator.setUseSpringBeanBinding(true);
        return factoryCreator;
    }

    @Bean
    public LocalValidatorFactoryBean validator() {
        return new LocalValidatorFactoryBean();
    }

}

3./WEB-INF/order/shopping/shopping-flow.xml和/WEB-INF/order/addToCart/addToCart-flow.xml同上
源码:http://download.csdn.net/detail/xiejx618/9569314