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笔记41 Spring Web Flow——Demo

發布時間：2025/3/15 javascript 23 豆豆

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訂購披薩的應用整體比較比較復雜，現拿出其中一個簡化版的流程：即用戶訪問首頁，然后輸入電話號（假定未注冊）后跳轉到注冊頁面，注冊完成后跳轉到配送區域檢查頁面，最后再跳轉回首頁。通過這個簡單的Demo用來說明Spring Web Flow的具體工作流程，方便以后細化整個訂購披薩應用。

基于Maven的項目，目錄結構如下：

1.首先建立依賴，pom.xml文件

1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 2 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> 3 <modelVersion>4.0.0</modelVersion> 4 <groupId>com.li</groupId> 5 <artifactId>SpringWebFlow</artifactId> 6 <packaging>war</packaging> 7 <version>0.0.1-SNAPSHOT</version> 8 <name>SpringWebFlow Maven Webapp</name> 9 <url>http://maven.apache.org</url> 10 <dependencies> 11 <dependency> 12 <groupId>junit</groupId> 13 <artifactId>junit</artifactId> 14 <version>3.8.1</version> 15 <scope>test</scope> 16 </dependency> 17  18 <dependency> 19 <groupId>org.springframework</groupId> 20 <artifactId>spring-beans</artifactId> 21 <version>4.3.7.RELEASE</version> 22 </dependency> 23 24 <dependency> 25 <groupId>org.springframework</groupId> 26 <artifactId>spring-context</artifactId> 27 <version>4.3.7.RELEASE</version> 28 </dependency> 29 30 <dependency> 31 <groupId>org.springframework</groupId> 32 <artifactId>spring-core</artifactId> 33 <version>4.3.7.RELEASE</version> 34 </dependency> 35 36 <dependency> 37 <groupId>org.springframework</groupId> 38 <artifactId>spring-web</artifactId> 39 <version>4.3.7.RELEASE</version> 40 </dependency> 41 42 <dependency> 43 <groupId>org.springframework</groupId> 44 <artifactId>spring-webmvc</artifactId> 45 <version>4.3.7.RELEASE</version> 46 </dependency> 47 48 <dependency> 49 <groupId>org.springframework</groupId> 50 <artifactId>spring-expression</artifactId> 51 <version>4.3.7.RELEASE</version> 52 </dependency> 53  54 <dependency> 55 <groupId>org.springframework.webflow</groupId> 56 <artifactId>spring-binding</artifactId> 57 <version>2.4.4.RELEASE</version> 58 </dependency> 59 60 <dependency> 61 <groupId>org.springframework.webflow</groupId> 62 <artifactId>spring-faces</artifactId> 63 <version>2.4.4.RELEASE</version> 64 </dependency> 65 66 <dependency> 67 <groupId>org.springframework.webflow</groupId> 68 <artifactId>spring-js</artifactId> 69 <version>2.4.4.RELEASE</version> 70 </dependency> 71 72 <dependency> 73 <groupId>org.springframework.webflow</groupId> 74 <artifactId>spring-js-resources</artifactId> 75 <version>2.4.4.RELEASE</version> 76 </dependency> 77 78 <dependency> 79 <groupId>org.springframework.webflow</groupId> 80 <artifactId>spring-webflow</artifactId> 81 <version>2.4.4.RELEASE</version> 82 </dependency> 83 84 <dependency> 85 <groupId>javax.servlet</groupId> 86 <artifactId>servlet-api</artifactId> 87 <version>2.5</version> 88 </dependency> 89 90 <dependency> 91 <groupId>javax.servlet</groupId> 92 <artifactId>jstl</artifactId> 93 <version>1.2</version> 94 </dependency> 95 </dependencies> 96 <build> 97 <finalName>SpringWebFlow</finalName> 98 <plugins> 99 <plugin> 100 <groupId>org.apache.maven.plugins</groupId> 101 <artifactId>maven-war-plugin</artifactId> 102 <version>3.0.0</version> 103 </plugin> 104 </plugins> 105 </build> 106 </project>

2.Spring Web Flow配置文件spring-wf.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:webflow="http://www.springframework.org/schema/webflow-config" 4 xsi:schemaLocation=" http://www.springframework.org/schema/beans 5 http://www.springframework.org/schema/beans/spring-beans-2.5.xsd 6 http://www.springframework.org/schema/webflow-config 7 http://www.springframework.org/schema/webflow-config/spring-webflow-config.xsd"> 8 9  11 <webflow:flow-executor id="flowExecutor" /> 12 13  14 <webflow:flow-registry id="flowRegistry" flow-builder-services="flowBuilderServices"> 15  16 <webflow:flow-location path="/WEB-INF/customer/customer-flow.xml" id="customer" /> 17 </webflow:flow-registry> 18 19  20 <bean id="flowViewResolver" 21 class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 22 <property name="viewClass" 23 value="org.springframework.web.servlet.view.JstlView"> 24 </property> 25 <property name="prefix" value="/WEB-INF/customer/"> 26 </property> 27 <property name="suffix" value=".jsp"> 28 </property> 29 </bean> 30 31  32 <webflow:flow-builder-services id="flowBuilderServices" view-factory-creator="mvcViewFactoryCreator" /> 33 34  35 <bean id="mvcViewFactoryCreator" class="org.springframework.webflow.mvc.builder.MvcViewFactoryCreator"> 36 <property name="viewResolvers" ref="flowViewResolver" /> 37 </bean> 38 39  40 <bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping"> 41 <property name="mappings"> 42 <props> 43  48  49 <prop key="customer.flow">flowController</prop> 50 </props> 51 </property> 52 </bean> 53 54  55  56 <bean id="flowController" class="org.springframework.webflow.mvc.servlet.FlowController"> 57 <property name="flowExecutor" ref="flowExecutor" /> 58 </bean> 59 </beans>

3.web.xml文件

1 <?xml version="1.0" encoding="UTF-8"?> 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 3 xmlns="http://xmlns.jcp.org/xml/ns/javaee" 4 xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" 5 id="WebApp_ID" version="3.1"> 6 <servlet> 7 <servlet-name>FlowServlet</servlet-name> 8 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 9 <init-param> 10 <param-name>contextConfigLocation</param-name> 11 <param-value> 12 classpath:spring-wf.xml 13 </param-value> 14 </init-param> 15 <load-on-startup>1</load-on-startup> 16 </servlet> 17 <servlet-mapping> 18 <servlet-name>FlowServlet</servlet-name> 19 <url-pattern>*.flow</url-pattern> 20 </servlet-mapping> 21 </web-app>

4.流程注冊文件，customer-flow.xml

1 <?xml version="1.0" encoding="UTF-8"?> 2 <flow xmlns="http://www.springframework.org/schema/webflow" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xsi:schemaLocation="http://www.springframework.org/schema/webflow 5 http://www.springframework.org/schema/webflow/spring-webflow-2.0.xsd"> 6 7 8 9  10 <view-state id="welcome"> 11 <transition on="phoneEntered" to="registrationForm"/> 12 <transition on="cancel" to="cancel"/> 13 </view-state> 14 15 <view-state id="registrationForm"> 16 <transition on="submit" to="deliveryWarning" /> 17 <transition on="cancel" to="cancel" /> 18 </view-state> 19 20 21 <view-state id="deliveryWarning"> 22 <transition on="accept" to="success" /> 23 <transition on="cancel" to="cancel" /> 24 </view-state> 25 26 <view-state id="success"> 27 <transition on="back" to="cancel"></transition> 28 </view-state> 29 30  31 32 <end-state id="cancel" view="externalRedirect:index.jsp"/> 33 <end-state id="customerReady" /> 34 </flow>

5.index.jsp（首頁）

1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 2 <% 3 String path = request.getContextPath(); 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 5 %> 6 7 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 8 <html> 9 <head> 10 <base href="<%=basePath%>"> 11 12 <title>My JSP 'cart.jsp' starting page</title> 13 14 <meta http-equiv="pragma" content="no-cache"> 15 <meta http-equiv="cache-control" content="no-cache"> 16 <meta http-equiv="expires" content="0"> 17 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 18 <meta http-equiv="description" content="This is my page"> 19  22 23 </head> 24 25 <body> 26 <h2 align="center">Hello，WebFlow</h2><br/> 27 Spizza:<a href="customer.flow">進入Spizza應用</a><br/> 28 </body> 29 </html>

6.welcome.jsp（輸入電話的頁面）

1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 2 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> 3 <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%> 4 <% 5 String path = request.getContextPath(); 6 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 7 %> 8 9 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 10 <html> 11 <head> 12 <base href="<%=basePath%>"> 13 14 <title>My JSP 'welcome.jsp' starting page</title> 15 16 <meta http-equiv="pragma" content="no-cache"> 17 <meta http-equiv="cache-control" content="no-cache"> 18 <meta http-equiv="expires" content="0"> 19 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 20 <meta http-equiv="description" content="This is my page"> 21  24 25 </head> 26 27 <body> 28 <h2>Welcome to Spizza！！！</h2> 29 <form:form> 30  31 <input type="hidden" name="_flowExecutionKey" 32 value="${flowExecutionKey}" /> 33 34 <input type="text" name="phoneNumber" /> 35 <br /> 36  37 <a href="${flowExecutionUrl}&_eventId=phoneEntered">Lookup 38 Customer</a> 39      40 <a href="${flowExecutionUrl}&_eventId=cancel">Cancel</a> 41 <br /> 42 </form:form> 43 </body> 44 </html>

7.registrationForm.jsp（注冊界面）

1 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> 2 <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %> 3 <html> 4 5 <head><title>Spring Pizza</title></head> 6 7 <body> 8 <h2>Customer Registration</h2> 9 <form> 10 <input type="hidden" name="_flowExecutionKey" 11 value="${flowExecutionKey}"/> 12 <b>Phone number: </b><input type='text'><br/> 13 <b>Name: </b><input type='text'><br/> 14 <b>Address: </b><input type='text'><br/> 15 <b>City: </b><input type='text'><br/> 16 <b>State: </b><input type='text'><br/> 17 <b>Zip Code: </b><input type='text'><br/> 18 </form> 19 <a href="${flowExecutionUrl}&_eventId=submit">Submit</a> 20      21 <a href="${flowExecutionUrl}&_eventId=cancel">Cancel</a> 22 </body> 23 </html>

8.deliveryWarning.jsp（配送區域檢查頁面）

1 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> 2 <html> 3 <head><title>Spring Pizza</title></head> 4 5 <body> 6 <h2>Delivery Unavailable</h2> 7 8 <p>The address is outside of our delivery area. The order 9 may still be taken for carry-out.</p> 10 11 <a href="${flowExecutionUrl}&_eventId=accept">Accept</a> | 12 <a href="${flowExecutionUrl}&_eventId=cancel">Cancel</a> 13 </body> 14 </html>

9.success.jsp（用戶添加成功頁面）

1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 2 <% 3 String path = request.getContextPath(); 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 5 %> 6 7 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 8 <html> 9 <head> 10 <base href="<%=basePath%>"> 11 12 <title>My JSP 'success.jsp' starting page</title> 13 14 <meta http-equiv="pragma" content="no-cache"> 15 <meta http-equiv="cache-control" content="no-cache"> 16 <meta http-equiv="expires" content="0"> 17 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 18 <meta http-equiv="description" content="This is my page"> 19  22 23 </head> 24 25 <body> 26 <h1>用戶注冊成功</h1> 27 <a href="${flowExecutionUrl}&_eventId=back">Home</a> | 28 </body> 29 </html>

9.運行結果

10.總結

相同點：SpringMVC和Spring Web Flow都實現了mvc設計模式

不同點：在mvc設計模式的實現方面不同

SpringMVC通過編寫controller,service類來實現

而流程則通過bean來實現，底層已經幫你實現了，幫你來處理請求跳轉到對應的視圖界面

轉載于:https://www.cnblogs.com/lyj-gyq/p/9112545.html

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