如何在jsp中显示shark的流程图? 用servlet+jawe可以实现此功能 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 原理其实很简单,利用jawe将xpdl处理为jpeg,然后在页面上显示,在web页面上显示shark的流程图的步骤:1、写一个servlet,将流程在web页面上以图形的方式显示。代码如下:package com.paiao.shark;import java.awt.*;import java.awt.image.BufferedImage;import java.io.IOException;import java.io.PrintStream;import javax.imageio.ImageIO;import javax.servlet.ServletException;import javax.servlet.ServletOutputStream;import javax.servlet.http.*;import org.enhydra.shark.Shark;import org.enhydra.shark.api.client.wfservice.AdminInterface;import org.enhydra.shark.api.client.wfservice.PackageAdministration;import org.enhydra.shark.api.client.wfbase.*;import java.io.*;import org.enhydra.jawe.*;import org.enhydra.jawe.graph.Process;import org.enhydra.jawe.xml.elements.Package;import org.enhydra.jawe.xml.elements.WorkflowProcess;import org.enhydra.jawe.xml.elements.WorkflowProcesses;import java.util.Iterator;public class ProcessImageServlet extends HttpServlet { private static boolean _debug = false; private static final long serialVersionUID = 1L; private static final String CONTENT_TYPE = "text/html; charset=GBK"; public void init() throws ServletException { System.out.println("init process image servlet"); JaWEConfig conf = JaWEConfig.getInstance(); conf.setBackgroundColor("Color.white"); conf.setGridColor("Color.white"); conf.setGenericActivityColor("Color.lightGray"); conf.setActivityWidth(75); conf.setActivityHeight(40); } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { String pkgId = request.getParameter("pkgId"); String processId = request.getParameter("procId"); String actSelect = request.getParameter("actId"); AbstractGraph g = createImage(pkgId, processId); if (g != null) { if (actSelect != null && !actSelect.equals("")) selectCell(g, actSelect); response.setContentType("image/png"); BufferedImage image = drawImage(g, true); ServletOutputStream out = response.getOutputStream(); ImageIO.write(image, "png", out); out.flush(); out.close(); } else { System.err.println("g == null"); } } catch (Exception e) { e.printStackTrace(); return; } } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } public void destroy() { } private static AbstractGraph createImage(String pkgId, String processId) { if (pkgId == null || processId == null) return null; String filename="D:\\javatest\\sharkjspclient\\defaultroot\\repository\\external\\gaoli.xpdl"; JaWE jawe=JaWE.getInstance(); Package pkg=jawe.openDocument(filename,true,false); PackageEditor pkgEd=jawe.getPackageEditor(); pkgEd.setNewPackage(pkg,true); WorkflowProcesses wps=(WorkflowProcesses)pkg.get("WorkflowProcesses"); Iterator it=wps.toCollection().iterator(); AbstractGraph currentGraph=null; while (it.hasNext()) { WorkflowProcess wp = (WorkflowProcess) it.next(); Process p = pkgEd.getProcessObject(wp); AbstractEditor editor = p.getImplementationEditor(); currentGraph = editor.getGraph(); currentGraph.setSize(currentGraph.getPreferredSize()); } return currentGraph; } public static String GBKToUTF(String strIn) { String strOut; strOut = null; if (strIn == null || strIn.trim().equals("")) return ""; byte[] b = null; try { b = strIn.getBytes("GB2312"); strOut = new String(b, "utf-8"); } catch (UnsupportedEncodingException ex) { } return strOut; } public static String GBKToUTF(byte strIn[]) { String strOut; strOut = null; if (strIn == null) return ""; try { strOut = new String(strIn, "utf-8"); } catch (UnsupportedEncodingException ex) { } return strOut; } private static void selectCell(AbstractGraph graph, String activityId) { try { WorkflowManager wm = graph.getWorkflowManager(); Object go = wm.getActivity(activityId); if (go != null) graph.addSelectionCell(go); } catch (Exception e) { System.err.println(e); return; } } private static BufferedImage drawImage(Component c, boolean resize) { if (resize) c.setSize(c.getPreferredSize()); Dimension size = c.getSize(); BufferedImage image = new BufferedImage(size.width - 50, size.height - 50, 1); Graphics2D g2 = image.createGraphics(); g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON); c.paint(g2); g2.dispose(); return image; }}2、写一个调用servlet的jsp页面,代码如下:<%@ page contentType="text/html; charset=GBK" %><%@ page language = "java" import="java.util.*" %><%@ page import="test.JSPClientUtilities" %><% String activityId = request.getParameter("activityId"); String g_ContextPath = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+g_ContextPath+"/jsp/workflow/"; String xpdl_process_id = "请假申请"; String []array = JSPClientUtilities.getGraphpicParameter(activityId); String workflowOpeningUrl = g_ContextPath + "/jsp/workflow/ProcessImage.png?" + "pkgId=" + array[0] + "&" + "procId=" + array[1] + "&" + "actId=" + array[2]; %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <base href="<%=basePath%>"> <title><%=xpdl_process_id%>流程图</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> </head> <body> <img src="<%=workflowOpeningUrl%>"> </body></html>3、在处理流程的页面上调用显示流程的jsp,要传一个当前活动的id,部分代码如下:function viewproc(activatyId){ window.open("/jsp/workflow/processImage.jsp?activityId="+activatyId,"查看流程信息","toolbar=no, status=no,menubar=no, scrollbars=yes,resizable=no,width=800,height=600,left=80,top=60");} 这样可行吗? 求助MySql:No Dialect mapping for JDBC type: -1 关于hibernate+SQL Server 程序编译错误,请高手看看怎么解决 javascription 页面跳转 怎么用tomact6.0的admin配置连接池? 如下代码,如何访问在当前目录生成的累。 各位大神help me Missing required attribute "id" 架构的问题,100分放送 hibernate查询 新看J2EE的几个问题 一次取出3万多条记录,这个时候使用rs.next()遍历,共耗时37秒,正常么? 为什么自己编译的Applet不能正常显示?
在web页面上显示shark的流程图的步骤:
1、写一个servlet,将流程在web页面上以图形的方式显示。代码如下:
package com.paiao.shark;import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.PrintStream;
import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.*;
import org.enhydra.shark.Shark;
import org.enhydra.shark.api.client.wfservice.AdminInterface;
import org.enhydra.shark.api.client.wfservice.PackageAdministration;
import org.enhydra.shark.api.client.wfbase.*;
import java.io.*;import org.enhydra.jawe.*;
import org.enhydra.jawe.graph.Process;
import org.enhydra.jawe.xml.elements.Package;
import org.enhydra.jawe.xml.elements.WorkflowProcess;
import org.enhydra.jawe.xml.elements.WorkflowProcesses;
import java.util.Iterator;public class ProcessImageServlet
extends HttpServlet {
private static boolean _debug = false;
private static final long serialVersionUID = 1L;
private static final String CONTENT_TYPE = "text/html; charset=GBK";
public void init() throws ServletException {
System.out.println("init process image servlet");
JaWEConfig conf = JaWEConfig.getInstance();
conf.setBackgroundColor("Color.white");
conf.setGridColor("Color.white");
conf.setGenericActivityColor("Color.lightGray");
conf.setActivityWidth(75);
conf.setActivityHeight(40);
}
public void doGet(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
try {
String pkgId = request.getParameter("pkgId");
String processId = request.getParameter("procId");
String actSelect = request.getParameter("actId");
AbstractGraph g = createImage(pkgId, processId);
if (g != null) {
if (actSelect != null && !actSelect.equals(""))
selectCell(g, actSelect);
response.setContentType("image/png");
BufferedImage image = drawImage(g, true);
ServletOutputStream out = response.getOutputStream();
ImageIO.write(image, "png", out);
out.flush();
out.close();
}
else {
System.err.println("g == null");
}
}
catch (Exception e) {
e.printStackTrace();
return;
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
doGet(request, response);
}
public void destroy() {
}
private static AbstractGraph createImage(String pkgId, String processId) {
if (pkgId == null || processId == null)
return null; String filename="D:\\javatest\\sharkjspclient\\defaultroot\\repository\\external\\gaoli.xpdl";
JaWE jawe=JaWE.getInstance();
Package pkg=jawe.openDocument(filename,true,false);
PackageEditor pkgEd=jawe.getPackageEditor();
pkgEd.setNewPackage(pkg,true);
WorkflowProcesses wps=(WorkflowProcesses)pkg.get("WorkflowProcesses");
Iterator it=wps.toCollection().iterator();
AbstractGraph currentGraph=null;
while (it.hasNext()) {
WorkflowProcess wp = (WorkflowProcess) it.next();
Process p = pkgEd.getProcessObject(wp);
AbstractEditor editor = p.getImplementationEditor();
currentGraph = editor.getGraph();
currentGraph.setSize(currentGraph.getPreferredSize());
}
return currentGraph;
}
public static String GBKToUTF(String strIn) {
String strOut;
strOut = null;
if (strIn == null || strIn.trim().equals(""))
return "";
byte[] b = null;
try {
b = strIn.getBytes("GB2312");
strOut = new String(b, "utf-8");
}
catch (UnsupportedEncodingException ex) {
}
return strOut;
}
public static String GBKToUTF(byte strIn[]) {
String strOut;
strOut = null;
if (strIn == null)
return "";
try {
strOut = new String(strIn, "utf-8");
}
catch (UnsupportedEncodingException ex) {
}
return strOut;
}
private static void selectCell(AbstractGraph graph, String activityId) {
try {
WorkflowManager wm = graph.getWorkflowManager();
Object go = wm.getActivity(activityId);
if (go != null)
graph.addSelectionCell(go);
}
catch (Exception e) {
System.err.println(e);
return;
}
}
private static BufferedImage drawImage(Component c, boolean resize) {
if (resize)
c.setSize(c.getPreferredSize());
Dimension size = c.getSize();
BufferedImage image = new BufferedImage(size.width - 50, size.height - 50,
1);
Graphics2D g2 = image.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
c.paint(g2);
g2.dispose();
return image;
}
}
2、写一个调用servlet的jsp页面,代码如下:
<%@ page contentType="text/html; charset=GBK" %>
<%@ page language = "java" import="java.util.*" %>
<%@ page import="test.JSPClientUtilities" %>
<%
String activityId = request.getParameter("activityId");
String g_ContextPath = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+g_ContextPath+"/jsp/workflow/";
String xpdl_process_id = "请假申请";
String []array = JSPClientUtilities.getGraphpicParameter(activityId);
String workflowOpeningUrl = g_ContextPath + "/jsp/workflow/ProcessImage.png?" +
"pkgId=" + array[0] + "&" +
"procId=" + array[1] + "&" +
"actId=" + array[2];
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title><%=xpdl_process_id%>流程图</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
</head>
<body>
<img src="<%=workflowOpeningUrl%>">
</body>
</html>
3、在处理流程的页面上调用显示流程的jsp,要传一个当前活动的id,部分代码如下:
function viewproc(activatyId){
window.open("/jsp/workflow/processImage.jsp?activityId="+activatyId,"查看流程信息","toolbar=no, status=no,menubar=no, scrollbars=yes,resizable=no,width=800,height=600,left=80,top=60");
}