springmvc的简单应用例子

例子来自《activiti实战》

程序文件结构

1.pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">    <modelVersion>4.0.0</modelVersion>    <groupId>com.wei.activiti</groupId>    <artifactId>ActivitiTest-1</artifactId>    <version>0.0.1-SNAPSHOT</version>    <packaging>war</packaging>    <!-- 属性配置以及各个依赖的版本 -->    <properties>        <!-- 各个依赖的版本号 -->        <activiti.version>5.16.4</activiti.version>        <spring.version>4.0.6.RELEASE</spring.version>        <jetty.version>8.1.11.v20130520</jetty.version>        <commons-lang3.version>3.1</commons-lang3.version>        <commons-io.version>2.4</commons-io.version>        <slf4j.version>1.7.2</slf4j.version>        <log4j.version>1.2.17</log4j.version>        <hibernate.version>4.1.4.Final</hibernate.version>        <cxf.version>2.6.14</cxf.version>        <drools.version>5.5.0.Final</drools.version>        <mule.version>3.4.0</mule.version>        <!-- 设置编码为UTF-8 -->        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>    </properties>    <dependencies>        <!-- activit begin -->        <dependency>            <groupId>org.activiti</groupId>            <artifactId>activiti-engine</artifactId>            <version>${activiti.version}</version>        </dependency>        <!-- activit end -->        <dependency>            <groupId>com.h2database</groupId>            <artifactId>h2</artifactId>            <version>1.3.172</version>        </dependency>        <!-- WEB begin -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-web</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-webmvc</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>jstl</artifactId>            <version>1.2</version>        </dependency>        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>servlet-api</artifactId>            <version>2.5</version>            <scope>provided</scope>        </dependency>        <!-- WEB end-->        <!-- Jackson JSON Mapper -->        <!-- SpringMVC的@ResponseBody需要使用 -->        <dependency>            <groupId>org.codehaus.jackson</groupId>            <artifactId>jackson-mapper-asl</artifactId>            <version>1.9.13</version>        </dependency>        <!-- utils -->        <dependency>            <groupId>commons-io</groupId>            <artifactId>commons-io</artifactId>            <version>${commons-io.version}</version>        </dependency>        <dependency>            <groupId>commons-fileupload</groupId>            <artifactId>commons-fileupload</artifactId>            <version>1.2.2</version>        </dependency>    </dependencies>    <build>          <defaultGoal>compile</defaultGoal>          <!-- 设置项目中依赖jar版本为1.7 Start -->          <finalName>spring-mvc-project</finalName>          <plugins>              <plugin>                  <groupId>org.apache.maven.plugins</groupId>                  <artifactId>maven-compiler-plugin</artifactId>                  <configuration>                      <source>1.7</source>                      <target>1.7</target>                  </configuration>              </plugin>          </plugins>          <!-- 设置项目中依赖jar版本为1.7 End -->      </build>  </project>

2.配置文件
2.1web.xml

<?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" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">  <display-name>ActivitiTest-1</display-name>  <context-param>    <param-name>contextConfigLocation</param-name>    <param-value>        classpath*:/applicationContext.xml    </param-value>  </context-param>  <!-- Spring的ApplicationContext载入 -->  <listener>    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  </listener>  <!-- Filter定义 -->  <!-- Character Encoding filter -->  <filter>    <filter-name>encodingFilter</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>  <filter-mapping>    <filter-name>encodingFilter</filter-name>    <url-pattern>/*</url-pattern>  </filter-mapping>  <!-- Spring MVC Servlet -->  <servlet>    <servlet-name>springServlet</servlet-name>    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>    <init-param>        <param-name>contextConfigLocation</param-name>        <param-value>/WEB-INF/spring-mvc.xml</param-value>    </init-param>    <load-on-startup>1</load-on-startup>  </servlet>  <servlet-mapping>    <servlet-name>springServlet</servlet-name>    <url-pattern>/</url-pattern>  </servlet-mapping>  <session-config>    <session-timeout>600</session-timeout>  </session-config></web-app>

2.2spring-mvc.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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context"    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:util="http://www.springframework.org/schema/util"    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.1.xsd        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd">    <!-- 自动扫描且只扫描@Controller -->    <context:component-scan base-package="com.wei.activiti" use-default-filters="false">        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" />    </context:component-scan>    <mvc:annotation-driven />    <mvc:default-servlet-handler />    <!-- 定义首页 -->    <mvc:view-controller path="/" view-name="redirect:/login/" />    <!-- 定义JSP -->    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <property name="prefix" value="/WEB-INF/views/" />        <property name="suffix" value=".jsp" />    </bean>    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"        p:messageConverters-ref="messageConverters"></bean>    <util:list id="messageConverters">        <bean class="org.springframework.http.converter.BufferedImageHttpMessageConverter" />        <bean class="org.springframework.http.converter.ByteArrayHttpMessageConverter" />        <bean class="org.springframework.http.converter.StringHttpMessageConverter" />        <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" />    </util:list>    <!-- 支持上传文件 -->    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver" /></beans>

2.3 applicationContext.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:jee="http://www.springframework.org/schema/jee"    xsi:schemaLocation="        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd        http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.1.xsd"    default-lazy-init="true">    <!-- 使用annotation 自动注册bean, 并保证@Required、@Autowired的属性被注入 -->    <context:component-scan base-package="com.wei.activiti">        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />    </context:component-scan></beans>

2.4 activiti.cfg.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"        xsi:schemaLocation="http://www.springframework.org/schema/beans                http://www.springframework.org/schema/beans/spring-beans.xsd">    <bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneInMemProcessEngineConfiguration">        <property name="databaseSchemaUpdate" value="true"/>    </bean></beans>

3.process-list.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%><c:set var="ctx" value="${pageContext.request.contextPath}"/><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>已部署流程定义列表</title></head><body>    <fieldset id="deployFiledset">        <legend>部署流程资源</legend>        <span><b>文件支持格式：</b>ip、bar、bpmn、bpmn20.xml</span>        <form action="${ctx }/chapter5/deploy" method="post" enctype="multipart/form-data" style="margin-top:1em;">            <input type="file" name="file" />            <input type="submit" value="Submit">        </form>    </fieldset>    <hr />    <table>        <thead>            <tr>                <th>流程定义ID</th>                <th>部署ID</th>                <th>流程定义名称</th>                <th>流程定义KEY</th>                <th>版本号</th>                <th>XML资源名称</th>                <th>图片资源名称</th>                <th width="80">操作</th>            </tr>        </thead>        <tbody>            <c:forEach items="${processDefinitionList }" var="pd">                <tr>                    <td>${pd.id }</td>                    <td>${pd.deploymentId }</td>                    <td>${pd.name }</td>                    <td>${pd.key }</td>                    <td>${pd.version }</td>                    <td><a target="_blank" href='${ctx }/chapter5/read-resource?pdid=${pd.id }&resourceName=${pd.resourceName }'>${pd.resourceName }</a></td>                    <td><a target="_blank" href='${ctx }/chapter5/read-resource?pdid=${pd.id }&resourceName=${pd.diagramResourceName }'>${pd.diagramResourceName }</a></td>                    <td><a target="_blank" href='${ctx }/chapter5/delete-deployment?deploymentId=${pd.deploymentId }'>删除</a></td>                </tr>             </c:forEach>        </tbody>    </table></body></html>

4.DeploymentController.java

package com.wei.activiti;import java.io.InputStream;import java.util.List;import java.util.zip.ZipInputStream;import javax.servlet.http.HttpServletResponse;import org.activiti.engine.RepositoryService;import org.activiti.engine.repository.DeploymentBuilder;import org.activiti.engine.repository.ProcessDefinition;import org.activiti.engine.repository.ProcessDefinitionQuery;import org.apache.commons.io.FilenameUtils;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.multipart.MultipartFile;import org.springframework.web.servlet.ModelAndView;/** * 部署流程 * @author Administrator * */@Controller@RequestMapping(value = "/chapter5")public class DeploymentController extends AbstractController{    RepositoryService repositoryService = pe.getRepositoryService();    /**     * 获取流程定义列表，返回已定义的流程信息     * @return ModelAndView     */    @RequestMapping(value="/process-list")    public ModelAndView processList(){        //对应WEB-INF/views/chapter5/process-list.jsp        ModelAndView mav = new ModelAndView("chapter5/process-list");        List<ProcessDefinition> processDefinitionList =                 repositoryService.createProcessDefinitionQuery().list();        mav.addObject("processDefinitionList",processDefinitionList);        return mav;    }    /**     * 部署流程资源     */    @RequestMapping(value="/deploy")    public String deploy(@RequestParam(value="file",required=true) MultipartFile file ){        //获取上传的文件名        String filename = file.getOriginalFilename();        try{            //得到输入流（字节流）对象            InputStream fileInputStream = file.getInputStream();            //文件的扩展名            String extension = FilenameUtils.getExtension(filename);            //zip或者bar类型的文件用ZipInputStream方式部署            DeploymentBuilder deployment = repositoryService.createDeployment();            if(extension.equals("zip")||extension.equals("bar")){                ZipInputStream zip = new ZipInputStream(fileInputStream);                deployment.addZipInputStream(zip);            }else{                //其他类型的文件直接部署                deployment.addInputStream(filename, fileInputStream);            }            deployment.deploy();        }catch(Exception e){            logger.error("error on deploy process,because of file input stream");        }        return "redirect:process-list";    }    /**     * 读取流程资源     *      * @param processDefintionId 流程定义ID     * @param resourceName 资源名称     */    @RequestMapping(value="/read-resource")    public void readResource(@RequestParam("pdid") String processDefinitionId,@RequestParam("resourceName") String resourceName,HttpServletResponse response)        throws Exception    {        ProcessDefinitionQuery pdq = repositoryService.createProcessDefinitionQuery();        ProcessDefinition pd = pdq.processDefinitionId(processDefinitionId).singleResult();        //通过接口读取        InputStream resourceAsStream = repositoryService.getResourceAsStream(pd.getDeploymentId(), resourceName);        //输出资源内容到相应对象        byte[] b = new byte[1024];        int len = -1;        while((len=resourceAsStream.read(b,0,1024))!=-1){            response.getOutputStream().write(b, 0, len);        }    }    /**     * 删除部署的流程，级联删除流程实例     * @param deploymentId 流程部署ID     */    @RequestMapping(value="/delete-deployment")    public String deleteProcessDefinition(@RequestParam("deploymentId") String deploymentId){        repositoryService.deleteDeployment(deploymentId,true);        return "redirect:process-list";    }}

5.AbstractController.java

package com.wei.activiti;import org.activiti.engine.ProcessEngine;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import util.ActivitiUtils;public abstract class AbstractController {    protected Logger logger = LoggerFactory.getLogger(getClass());    protected ProcessEngine pe = null;    public AbstractController(){        super();        pe = ActivitiUtils.getProcessEngine();    }}

6.ActiviyiUtils.java

package util;import org.activiti.engine.ProcessEngine;import org.activiti.engine.ProcessEngineConfiguration;/** * Activiti工具类，只有一个方法，获得单例的ProcessEngine对象 * @author Administrator * */public class ActivitiUtils {    private static ProcessEngine pe;    /**     * 单例模式获取引擎对象     */    public static ProcessEngine getProcessEngine(){        if(pe==null){            /**             * 使用默认的配置文件名称（activiti.cfg.xml）创建引擎对象             */            pe = ProcessEngineConfiguration.createProcessEngineConfigurationFromResourceDefault().buildProcessEngine();        }        return pe;    }}