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bboss is a j2ee framework include aop/ioc,mvc,persistent,taglib,rpc,event ,bean-xml serializable and so on.http://www.bbossgroups.com
package com.frameworkset.util;
import bboss.org.apache.velocity.Template;
import bboss.org.apache.velocity.VelocityContext;
import bboss.org.apache.velocity.app.Velocity;
import bboss.org.apache.velocity.app.VelocityEngine;
import bboss.org.apache.velocity.exception.MethodInvocationException;
import bboss.org.apache.velocity.exception.ParseErrorException;
import bboss.org.apache.velocity.exception.ResourceNotFoundException;
import bboss.org.apache.velocity.runtime.resource.Resource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.*;
import java.net.URL;
import java.net.URLDecoder;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;
//import org.frameworkset.spi.BaseApplicationContext;
//
/**
* Title:
*
* Description:
*
* Copyright: Copyright (c) 2005
*
* Company: bbossgroups
*
* @author biaoping.yin
* @version 1.0
*/
public class VelocityUtil{
private static Logger log = LoggerFactory.getLogger(VelocityUtil.class);
private static boolean inited = false;
private static boolean VERSION_OLD = true;
public static boolean OLDVERSION()
{
init(null);
return VERSION_OLD;
}
// static {
// init(null);
// }
//
private static File computeApplicationDir(URL location, File defaultDir)
{
if (location == null)
{
System.out.println("Warning: Cannot locate the program directory. Assuming default.");
return defaultDir;
}
if (!"file".equalsIgnoreCase(location.getProtocol()))
{
System.out.println("Warning: Unrecognized location type. Assuming default.");
return new File(".");
}
String file = location.getFile();
if (!file.endsWith(".jar") && !file.endsWith(".zip"))
{
try
{
return (new File(URLDecoder.decode(location.getFile(), "UTF-8"))).getParentFile().getParentFile();
}
catch (UnsupportedEncodingException e)
{
}
System.out.println("Warning: Unrecognized location type. Assuming default.");
return new File(location.getFile());
}
else
{
try
{
File path = null;//new File(URLDecoder.decode(location.toExternalForm().substring(6), "UTF-8")).getParentFile();
if(!isLinux())
{
path = new File(URLDecoder.decode(location.toExternalForm().substring(6), "UTF-8")).getParentFile().getParentFile();
}
else
{
path = new File(URLDecoder.decode(location.toExternalForm().substring(5), "UTF-8")).getParentFile().getParentFile();
}
// System.out.println("path: " + path.getAbsolutePath());
// System.out.println("location: " + location.getPath());
// System.out.println("external from location: " + URLDecoder.decode(location.toExternalForm().substring(6), "UTF-8"));
// System.out.println("external from location + 6: " + URLDecoder.decode(location.toExternalForm(), "UTF-8"));
return path;
}
catch (UnsupportedEncodingException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
System.out.println("Warning: Unrecognized location type. Assuming default.");
return new File(location.getFile());
}
/**
* determine the OS name
*
* @return The name of the OS
*/
public static final String getOS() {
return System.getProperty("os.name");
}
/**
* @return True if the OS is a Windows derivate.
*/
public static final boolean isWindows() {
return getOS().startsWith("Windows");
}
/**
* @return True if the OS is a Linux derivate.
*/
public static final boolean isLinux() {
return getOS().startsWith("Linux");
}
private static Object lock = new Object();
public static VelocityEngine initVelocityEngine(String config){
try {
java.util.Properties pros = SimpleStringUtil.getProperties(config, VelocityUtil.class);
VelocityEngine velocityEngine = new VelocityEngine();
velocityEngine.init(pros);
return velocityEngine;
}
catch (RuntimeException e){
throw e;
}
catch (Exception e){
throw new RuntimeException("Init VelocityEngine from "+config + " failed:",e);
}
}
public static void init(String approot)
{
if(inited)
return;
synchronized(lock)
{
if(inited)
return;
try {
if(approot == null)
{
Properties aop = SimpleStringUtil.getProperties(SimpleStringUtil.AOP_PROPERTIES_PATH, VelocityUtil.class);
if(aop != null)
{
String approot_ = aop.getProperty("approot");
if(approot_ != null && !approot_.equals(""))
{
approot = approot_;
}
}
}
else
{
File f = new File(approot);
if(!f.exists())
{
Properties aop = SimpleStringUtil.getProperties(SimpleStringUtil.AOP_PROPERTIES_PATH, VelocityUtil.class);
if(aop != null)
{
String approot_ = aop.getProperty("approot");
if(approot_ != null && !approot_.equals(""))
{
approot = approot_;
}
}
}
}
String appDir = FileUtil.apppath != null ?FileUtil.apppath + "/WEB-INF":"/WEB-INF";
log.debug("FileUtil.apppath:"+FileUtil.apppath);
if(approot != null && !new File(appDir).exists())
{
appDir = approot + "/WEB-INF";
}
String templatePath = appDir + "/templates";
File templatePathFile = new File(templatePath);
if(!templatePathFile.exists())
{
Properties aop = SimpleStringUtil.getProperties(SimpleStringUtil.AOP_PROPERTIES_PATH, VelocityUtil.class);
if(aop != null)
{
String approot_ = aop.getProperty("approot");
if(approot_ != null && !approot_.equals(""))
{
templatePath = SimpleStringUtil.getRealPath(approot_, "/WEB-INF/templates");
}
}
}
// File configurationFile = new File(appDir, "/classes/velocity.properties");
// log.debug("configurationFile.getAbsolutePath():"+configurationFile.getAbsolutePath());
log.debug("velocity.properties:"+ VelocityUtil.class.getResource("/bboss-velocity.properties"));
// log.debug("file.resource.loader.path:"+ templatePath);
java.util.Properties pros =SimpleStringUtil.getProperties("/bboss-velocity.properties", VelocityUtil.class);
// pros.load(new java.io.FileInputStream(configurationFile));
String loadclass =(String) pros.get("file.resource.loader.class");
if(loadclass != null && loadclass.equals("bboss.org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader"))
{
// templatePath = "/";
VERSION_OLD = false;
}
else
{
pros.setProperty("file.resource.loader.path", templatePath);
}
//初始化velocity
try {
Velocity.init(pros);
inited = true;
// BaseApplicationContext.addShutdownHook(new Runnable() {
//
// public void run()
// {
//
// inited = false;
//
// }
// });
} catch (Throwable ex) {
try {
log.error("Init velocity failed from bboss-velocity.properties："+ ex.getMessage(),ex) ;
Velocity.init("velocity.properties");
inited = true;
} catch (Exception e) {
inited = true;
log.error("Init velocity failed:velocity.properties (系统找不到指定的文件。) 检查classpath中是否配置正确:"+ ex.getMessage(),e);
}
}
} catch (Exception e) {
inited = true;
log.error("Init velocity failed:"+ e.getMessage(),e);
} catch (Throwable ex) {
inited = true;
log.error("Init velocity failed:"+ ex.getMessage(),ex);
}
}
}
//private static Map templates;
public static Template getTemplate(String templateName) {
if(SimpleStringUtil.isEmpty(templateName))
return null;
init(null);
Template template = null;
try {
if(!VERSION_OLD && !templateName.startsWith("templates/"))
templateName = "templates/" + templateName;
template = Velocity.getTemplate(templateName);
} catch (ResourceNotFoundException rnfe) {
//rnfe.printStackTrace();
log.error("Cannot find template " +
templateName + ": new version have change template dir as classpath root relatived,but not web-inf dir,please copy templates in web-inf to classpath root dir.",rnfe);
} catch (ParseErrorException pee) {
// pee.printStackTrace();
log.error("Syntax error in template " +
templateName + ":",pee);
} catch (Exception ex) {
log.error("Error in Template " +
templateName + ":" ,ex);
}
return template;
}
/**
* 字符串模板解析
* @param context
* @param templateName
* @param template
* @return
*/
public static String evaluate(VelocityContext context, String templateName, String template)
{
init(null);
StringWriter out = new StringWriter();
try {
Velocity.evaluate(context, out, templateName, template);
} catch (ParseErrorException e) {
e.printStackTrace();
return template;
} catch (MethodInvocationException e) {
e.printStackTrace();
return template;
} catch (ResourceNotFoundException e) {
e.printStackTrace();
return template;
} catch (Exception e) {
e.printStackTrace();
return template;
}
return out.toString();
}
/**
* 字符串模板解析
* @param context
* @param templateName
* @param template
* @return
*/
public static void evaluate(VelocityContext context, Writer out,String templateName, String template)
{
init(null);
try {
Velocity.evaluate(context, out, templateName, template);
} catch (ParseErrorException e) {
e.printStackTrace();
} catch (MethodInvocationException e) {
e.printStackTrace();
} catch (ResourceNotFoundException e) {
e.printStackTrace();
}catch (Exception e) {
e.printStackTrace();
}
}
/**
* 字符串模板解析
* @param context
* @param templateName
* @param template
* @return
*/
public static String evaluate(VelocityContext context, String templateName, InputStream template)
{
init(null);
StringWriter out = new StringWriter();
try {
Velocity.evaluate(context, out, templateName, template);
} catch (ParseErrorException e) {
e.printStackTrace();
return null;
} catch (MethodInvocationException e) {
e.printStackTrace();
return null;
} catch (ResourceNotFoundException e) {
e.printStackTrace();
return null;
} catch (Exception e) {
e.printStackTrace();
return null;
}
return out.toString();
}
/**
* 字符串模板解析
* @param context
* @param templateName
* @param template
* @return
*/
public static void evaluate(VelocityContext context, Writer out,String templateName, InputStream template)
{
init(null);
try {
Velocity.evaluate(context, out, templateName, template);
} catch (ParseErrorException e) {
e.printStackTrace();
} catch (MethodInvocationException e) {
e.printStackTrace();
} catch (ResourceNotFoundException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 字符串模板解析
* @param context
* @param templateName
* @param template
* @return
*/
public static String evaluate(VelocityContext context, String templateName, Reader template)
{
init(null);
StringWriter out = new StringWriter();
try {
Velocity.evaluate(context, out, templateName, template);
} catch (ParseErrorException e) {
e.printStackTrace();
return null;
} catch (MethodInvocationException e) {
e.printStackTrace();
return null;
} catch (ResourceNotFoundException e) {
e.printStackTrace();
return null;
} catch (Exception e) {
e.printStackTrace();
return null;
}
return out.toString();
}
/**
* 字符串模板解析
* @param context
* @param templateName
* @param template
* @return
*/
public static void evaluate(VelocityContext context, Writer out,String templateName, Reader template)
{
init(null);
try {
Velocity.evaluate(context, out, templateName, template);
} catch (ParseErrorException e) {
e.printStackTrace();
} catch (MethodInvocationException e) {
e.printStackTrace();
} catch (ResourceNotFoundException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
public static VelocityContext buildVelocityContext(Map context)
{
VelocityContext context_ = new VelocityContext();
if(context != null && context.size() > 0)
{
Iterator it = context.keySet().iterator();
while(it.hasNext())
{
String key = it.next();
context_.put(key, context.get(key));
}
}
return context_;
}
/**
* 字符串模板解析
* @param context
* @param templateName
* @param template
* @return
*/
public static String evaluate(Map context, String templateName, String template)
{
init(null);
StringWriter out = new StringWriter();
try {
Velocity.evaluate(buildVelocityContext( context), out, templateName, template);
} catch (ParseErrorException e) {
e.printStackTrace();
return template;
} catch (MethodInvocationException e) {
e.printStackTrace();
return template;
} catch (ResourceNotFoundException e) {
e.printStackTrace();
return template;
} catch (Exception e) {
e.printStackTrace();
return template;
}
return out.toString();
}
/**
* 字符串模板解析
* @param context
* @param templateName
* @param template
* @return
*/
public static void evaluate(Map context, Writer out,String templateName, String template)
{
init(null);
try {
Velocity.evaluate(buildVelocityContext( context), out, templateName, template);
} catch (ParseErrorException e) {
e.printStackTrace();
} catch (MethodInvocationException e) {
e.printStackTrace();
} catch (ResourceNotFoundException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 字符串模板解析
* @param context
* @param templateName
* @param template
* @return
*/
public static String evaluate(Map context, String templateName, InputStream template)
{
init(null);
StringWriter out = new StringWriter();
try {
Velocity.evaluate(buildVelocityContext( context), out, templateName, template);
} catch (ParseErrorException e) {
e.printStackTrace();
return null;
} catch (MethodInvocationException e) {
e.printStackTrace();
return null;
} catch (ResourceNotFoundException e) {
e.printStackTrace();
return null;
} catch (Exception e) {
e.printStackTrace();
return null;
}
return out.toString();
}
/**
* 字符串模板解析
* @param context
* @param templateName
* @param template
* @return
*/
public static void evaluate(Map context, Writer out,String templateName, InputStream template)
{
init(null);
try {
Velocity.evaluate(buildVelocityContext( context), out, templateName, template);
} catch (ParseErrorException e) {
e.printStackTrace();
} catch (MethodInvocationException e) {
e.printStackTrace();
} catch (ResourceNotFoundException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 字符串模板解析
* @param context
* @param templateName
* @param template
* @return
*/
public static String evaluate(Map context, String templateName, Reader template)
{
init(null);
StringWriter out = new StringWriter();
try {
Velocity.evaluate(buildVelocityContext( context), out, templateName, template);
} catch (ParseErrorException e) {
e.printStackTrace();
return null;
} catch (MethodInvocationException e) {
e.printStackTrace();
return null;
} catch (ResourceNotFoundException e) {
e.printStackTrace();
return null;
} catch (Exception e) {
e.printStackTrace();
return null;
}
return out.toString();
}
/**
* 字符串模板解析
* @param context
* @param templateName
* @param template
* @return
*/
public static void evaluate(Map context, Writer out,String templateName, Reader template)
{
init(null);
try {
Velocity.evaluate(buildVelocityContext( context), out, templateName, template);
} catch (ParseErrorException e) {
e.printStackTrace();
} catch (MethodInvocationException e) {
e.printStackTrace();
} catch (ResourceNotFoundException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
public static void initTemplate(Resource template)
{
init(null);
Velocity.initTemplate(template);
}
public static void initTemplate(Resource template,String encoding)
{
init(null);
Velocity.initTemplate(template, encoding);
}
public static void main(String[] args) {
VelocityUtil velocityutil = new VelocityUtil();
VelocityContext fcontext = new VelocityContext();
}
}