JBPM学习（二）--测试模块代码

此篇接上篇 JBPM学习（一）--与SSH整合

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SSH与JBPM整合好以后我们必须写测试代码才能确认到底整合成功与否。

在jbpm-4.4\examples\src\org\jbpm\examples路径下我们可以找到官方自带的Demo。

在不知JBPM如何使用前，最好看看Demo的代码。

我挑了这个目录下java这个文件夹里面的代码。把它拷贝到Eclipse中看看。

process.jpdl.xml是流程定义文件，这个打开后能看到图形，也可以看源码。



3个bean和一个测试类。我们要把这些代码整合到SSH中去，就把每个方法在Action重新定义一遍就可以了。

搞定之后，我们再照着自己再定义一个流程。

在Eclipse中新建一个jBPM 4 Process Definition文件。

然后就可以用Eclipse的插件来画流程图了。



WorkFlowTestAction

package org.jbpm.action;

import java.util.List;

import org.base.MyBaseAction;
import org.jbpm.api.ExecutionService;
import org.jbpm.api.ProcessDefinition;
import org.jbpm.api.ProcessEngine;
import org.jbpm.api.ProcessInstance;
import org.jbpm.api.RepositoryService;
import org.jbpm.api.TaskService;
import org.jbpm.api.task.Task;

public class WorkFlowTestAction  extends MyBaseAction {
private static final long serialVersionUID = 1L;

public String execute() throws Exception{

return SUCCESS;
}

//发布流程
public String setUp() throws Exception {
RepositoryService repositoryService=getProcessEngine().getRepositoryService();

String pro="1";
if(this.getHttpServletRequest().getParameter("pro")!=null){
pro=(String)this.getHttpServletRequest().getParameter("pro");
if(!pro.trim().equals("")){
if(pro.equals("2")){

deploymentId = repositoryService.createDeployment()
.addResourceFromClasspath("org/jbpm/config/process.jpdl.xml")//流程定义
.addResourceFromClasspath("org/jbpm/config/process.png")//流程定义图，这个可选
.deploy();
System.out.println("发布流程2,ID:"+deploymentId);
}else{

deploymentId = repositoryService.createDeployment()
.addResourceFromClasspath("org/jbpm/config/myprocess.jpdl.xml")//流程定义
.addResourceFromClasspath("org/jbpm/config/myprocess.png")//流程定义图
.deploy();
System.out.println("发布流程1,ID:"+deploymentId);
}

}
}

return NONE;
}

//查询流程
public String showAll() throws Exception {
RepositoryService repositoryService=getProcessEngine().getRepositoryService();

String proname="";
if(this.getHttpServletRequest().getParameter("proname")!=null){
proname=(String)this.getHttpServletRequest().getParameter("proname");
if(proname.trim().equals("")){
System.out.println("proname参数为空，查询所有流程");
List<ProcessDefinition> processDefinitions = repositoryService.createProcessDefinitionQuery().list();
if(processDefinitions!=null){
this.setValueToRequest("processDefinitions", processDefinitions);
}
}else{
System.out.println("proname参数"+proname);
List<ProcessDefinition> processDefinitions = repositoryService
.createProcessDefinitionQuery().processDefinitionName(proname).list();

if(processDefinitions!=null){
this.setValueToRequest("processDefinitions", processDefinitions);
}
}

}

return SUCCESS;
}

//删除流程
public String tearDown() throws Exception {
RepositoryService repositoryService=getProcessEngine().getRepositoryService();
String delId="";
if(this.getHttpServletRequest().getParameter("delId")!=null){
delId=(String)this.getHttpServletRequest().getParameter("delId");

if(!delId.trim().equals("")){
repositoryService.deleteDeploymentCascade(delId);
System.out.println("删除流程,ID:"+delId);
}else{
System.out.println("流程,ID为空，删除失败");
}
}else{
System.out.println("流程,ID为空，删除失败");
}

return NONE;
}

public ProcessEngine processEngine;

public ProcessEngine getProcessEngine() {
return processEngine;
}

public void setProcessEngine(ProcessEngine processEngine) {
this.processEngine = processEngine;
}

public String deploymentId;

public String getDeploymentId() {
return deploymentId;
}

public void setDeploymentId(String deploymentId) {
this.deploymentId = deploymentId;
}
}

struts_jbpm_test.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="jbpmtest" extends="base-struts-default" namespace="/jbpmtest">
<action name="setUp" class="org.jbpm.action.WorkFlowTestAction" method="setUp">
</action>
<action name="tearDown" class="org.jbpm.action.WorkFlowTestAction" method="tearDown">
</action>
<action name="showAll" class="org.jbpm.action.WorkFlowTestAction" method="showAll">
<result name="success">/jsp/jbpmtest/listProcess.jsp</result>
</action>
</package>
</struts>

listProcess.jsp

<%@ page contentType="text/html; charset=UTF-8"%>
<%@page import="java.util.*"%>
<%@page import="org.jbpm.api.ProcessDefinition"%>
<%
String path = request.getContextPath();
%>
<%
List list=null;
if(request.getAttribute("processDefinitions")!=null){
list=(List)request.getAttribute("processDefinitions");
}
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title></title>
<script src="<%=path%>/script/jquery-1.7.1.min.js" type="text/javascript"></script>
</head>
<body style="overflow: scroll; overflow: auto;">

<input type="hidden" name="path" id="path" value='<%=path%>' ></input>

<table width="500px"  border="1" align="center">
<tr>
<td align="center">流程名字:<input type="text"  id="proname" value='' ></input></td>
</tr>
<tr>
<td align="center"><h1><a href="javascript:void(0)" onclick="query()">查询</a></h1></td>
</tr>

<tr>
<td align="center"><input type="button" onclick="setUpProcess('1')"  value='发布流程1--myprocess' ></input></td>
</tr>
<tr>
<td align="center"><input type="button" onclick="setUpProcess('2')"  value='发布流程2--java' ></input></td>
</tr>

</table>

<table width="500px"  border="1" align="center">
<tr>
<th align="center">流程id</th><th align="center">流程名字</th><th align="center">操作</th>
</tr>
<%
if(list!=null){
for(int i=0;i<list.size();i++){
ProcessDefinition process=(ProcessDefinition)list.get(i);
if(process!=null){
String proid="";
String proname="";
if(process.getDeploymentId()!=null){
proid=process.getDeploymentId();
}
if(process.getName()!=null){
proname=process.getName();
}
%>
<tr>
<td><%=proid%></td><td><%=proname%></td><td><input type="button" onclick="delprocess('<%=proid%>')"  value='删除' ></input></td>
</tr>
<%
}
}
}
%>

</table>
</body>
</html>
<script type="text/javascript">

function query(){
var proname=document.getElementById("proname").value;
var urlpath="<%=path%>/jbpmtest/showAll.action?proname="+proname+"&randomStr="+Math.random();
window.location.href=urlpath;

}

function delprocess(id){
var urlpath="<%=path%>"+"/jbpmtest/tearDown.action";
$.ajax({
type:"POST",
url:urlpath,
data: "delId="+id+"&randomStr="+Math.random(),
success: function(msg){
alert("成功删除！");
window.location.reload();
}
});
}

function setUpProcess(pro){

var urlpath="<%=path%>"+"/jbpmtest/setUp.action";
$.ajax({
type:"POST",
url:urlpath,
data: "pro="+pro+"&randomStr="+Math.random(),
success: function(msg){
alert("成功发布！");
window.location.reload();
}
});
}
</script>

如下是整合后的package结构图：



在启动服务器时没有报错，但是在访问jsp页面时，却报错了：

严重: Servlet.service() for servlet jsp threw exception

java.lang.LinkageError: loader constraint violation: when resolving interface method

"javax.servlet.jsp.JspApplicationContext.getExpressionFactory()Ljavax/el/ExpressionFactory;" the

class loader (instance of

org/apache/jasper/servlet/JasperLoader) of the current class, org/apache/jsp/index_jsp, and the

class loader (instance of

org/apache/catalina/loader/StandardClassLoader) for resolved class,

javax/servlet/jsp/JspApplicationContext, have different

Class objects for the type javax/el/ExpressionFactory used in the signature

at org.apache.jsp.index_jsp._jspInit(index_jsp.java:24)

at org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:52)

从网上找到了原因：

原因：

jbpm4 在tomcat6 下面ssh2 这个错误！

原因是项目中WEB-INF\lib中的三个jar包(juel.jar, juel-engine.jar, juel-impl.jar)和tomcat6下lib中jar

包(el-api.jar)冲突

解决方法：

方法一：换成tomcat5.5 一点问题也没有了

方法二：将juel.jar, juel-engine.jar, juel-impl.jar这三个包复制到tomcat6下lib中，并删除原来的

el-api.jar，切记要把WEB-INF\lib中的juel.jar, juel-engine.jar, juel-impl.jar删除。不然还是要冲突。

------------------------------------------------------------------------------------------------------------------------------------------------------------

继续。。。。

访问http://localhost:8080/frame/jbpmtest/showAll.action

分别请求action中的查询，发布，删除方法都正常。

好，到现在算是整合成功了。

看看效果吧：