构建和运行速度生成HTML [英] Building and Running Velocity Generating HTML
问题描述
我很新的使用速度。我想用它来生成一个HTML表单。我在Eclipse中工作。下面的罐子都在我的类路径:
速度-DEP-1.5.jar
公地collections.jar
公地lang.jar
的log4j-1.2.8.jar
的ant.jar
我运行一个Ant构建文件来构建我的项目,但我没有看到正在生成的HTML。是否有什么我失踪,为了得到它实际生成HTML文件?我下面的教程只有我基于矿山关闭的两个文件。它的工作人称,但也许还有别的东西,我不知道是新的使用速度。我已经包括了我的code和构建脚本,使之更容易看到,如果我失去了一些东西。非常感谢你!
我有模板code我在这里的形式( form.vm
)
< HTML和GT;
< HEAD>
<标题>我的形式和LT; /标题>
< /头><身体GT;
#如果($ fieldErrors)
#foreach($在$ fieldErrors误差)
$错误< BR>
#结束
#结束
#如果($的ActionErrors)
#foreach($在$的ActionErrors误差)
$错误< BR>
#结束
#结束<表格名称=编辑行动=edit.action方法=后>
<表>
< TR>< TD>测试与LT; / TD>< TD> 123 LT; / TD>< / TR>
#foreach($在$单选列表图)
#formRowRadio(办法$法真$选择)< BR />
#结束
< /表>
<表>
#foreach($在$文本清单图)
#formRowText($标签$标签$值)
#结束
< TR>< TD>&安培; NBSP;< / TD>< TD><输入类型=提交名称=提交值=提交>< / TD>< / TR&GT ;
< /表>< /表及GT;< /身体GT;
< / HTML>
下面是java code。我在那一起去( formDemo.java
)
进口java.io.StringWriter中;
进口的java.util.ArrayList;
进口的java.util.HashMap;
进口的java.util.Map;进口org.apache.velocity.VelocityContext;
进口org.apache.velocity.app.Velocity;
进口org.apache.velocity.Template;公共类formDemo {
公共静态无效的主要(字串[] args)
抛出异常{ Velocity.init(); ArrayList的单选列表=新的ArrayList();
地图=新的HashMap();
map.put(法,是);
map.put(选中,FALSE);
radioList.add(地图); 地图=新的HashMap();
map.put(法,否);
map.put(选中,FALSE);
radioList.add(地图); / *
*列表添加到VelocityContext
* /
VelocityContext语境=新VelocityContext();
context.put(收音机,单选列表); ArrayList的文本清单=新的ArrayList();
地图=新的HashMap();
map.put(标签,名字);
map.put(价值,);
textList.add(地图); 地图=新的HashMap();
map.put(标签,姓氏);
map.put(价值,);
textList.add(地图); context.put(文本框,文本清单);
模板模板= Velocity.getTemplate(form.vm);
StringWriter的作家=新的StringWriter();
template.merge(背景下,作家);
}
}
构建脚本(的build.xml
)
< XML版本='1.0'编码='UTF-8'&GT?;
<,项目名称=velocityTemplate默认为罐子BASEDIR =><属性名='CLS'位置='$ {BASEDIR} /班'/>
<属性名='逸'位置='$ {BASEDIR} /数据/>
<属性名='根'的位置='$ {BASEDIR} /根/>
<属性名='库'的位置='$ {BASEDIR} / lib目录/>
<属性名='src'中的位置='$ {BASEDIR} / src目录/>
<属性名=TMP位置='$ {BASEDIR} /模板/><路径ID ='project.classpath'>
< pathelement位置='$ {} CLS/>
<文件集DIR ='$ {} lib目录包括='*罐子。/>
< /路径> <目标名称='干净'的描述='干净'>
<删除DIR ='$ {} CLS/>
<删除DIR ='$ {}根/>
< /目标与GT;<目标名称='补偿'描述='编译源。'>
<的mkdir DIR ='$ {} CLS/>
< javac的SRCDIR =$ {src}字符串'DESTDIR ='$ {} CLS'classpathref ='project.classpath'叉=真/>
< /目标与GT;<目标名称='罐子'取决于='补偿'描述='JAR应用程序。'>
<坛子destfile =$ {} ant.project.name的.jar更新='假'FILESONLY ='真'指数='真'>
<文件集DIR ='$ {} CLS/>
<文件集DIR ='$ {src}字符串/>
< /瓶>
< /目标与GT;<目标名称='运行'取决于='罐子'描述=运行应用程序。'>
<路径ID ='velocityTemplate.classpath'>
< pathelement位置='$ {} ant.project.name的.jar/>
<文件集DIR ='$ {} lib目录包括='*罐子。/>
< /路径>
<的taskdef classpathref ='velocityTemplate.classpath/>
<的mkdir DIR ='$ {}根/>
<枚举outputPath ='$ {}根'inputPath ='$ {}逸'templateFile ='$ {} TMP /form.vm/>
< /目标与GT;<目标名称=形式描述='创建形式'>
<路径ID ='velocityTemplate.classpath'>
< pathelement位置='$ {BASEDIR} /velocityTemplate.jar/>
< pathelement位置='$ {}的lib /velocity-dep-1.5.jar/>
< /路径> <的taskdef classpathref ='velocityTemplate.classpath/>
< velocityTemplate outputPath ='$ {BASEDIR} / src目录templateFile ='$ {BASEDIR} /form.vm/>
< /目标与GT;< /项目>
如果你只是想看到正在生成的HTML,你必须打印出的StringWriter的值或将其写入文件。
目前,除非有code丢失,你只是填补了缓冲区。
模板模板= Velocity.getTemplate(form.vm);
StringWriter的作家=新的StringWriter();
template.merge(背景下,作家);
template.merge(背景下,作家)只是渲染模板到的StringWriter对象。
I'm very new to using Velocity. I am trying to use it to generate an HTML form. I am working in Eclipse. The following jars are in my classpath:
velocity-dep-1.5.jar
commons-collections.jar
commons-lang.jar
log4j-1.2.8.jar
ant.jar
I am running an ant build file to build my project, but I don't see the HTML being generated. Is there something I'm missing in order to get it to actually generate the HTML file? The tutorial I was following only has two files that I based mine off of. It worked for the author, but perhaps there is something else that I don't realize being new to using velocity. I have included my code and build script to make it easier to see if I'm missing something. Thank you very much!
I have the template code for my form here (form.vm
):
<html>
<head>
<title> My Form </title>
</head>
<body>
#if ($fieldErrors)
#foreach ($error in $fieldErrors)
$error<br>
#end
#end
#if ($actionErrors)
#foreach ($error in $actionErrors)
$error<br>
#end
#end
<form name="edit" action="edit.action" method="post">
<table>
<tr><td>Testing</td><td>123</td></tr>
#foreach($map in $radioList)
#formRowRadio("method" $method "true" $selected)<br/>
#end
</table>
<table>
#foreach($map in $textList)
#formRowText($label $label $value)
#end
<tr><td> </td><td><input type="submit" name="submit" value="submit"></td></tr>
</table>
</form>
</body>
</html>
Here is the java code I have to go along with that (formDemo.java
)
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;
import org.apache.velocity.Template;
public class formDemo {
public static void main ( String[] args )
throws Exception {
Velocity.init();
ArrayList radioList = new ArrayList();
Map map = new HashMap();
map.put("method", "Yes");
map.put("selected", false);
radioList.add(map);
map = new HashMap();
map.put("method", "No");
map.put("selected", false);
radioList.add(map);
/*
* add the list to a VelocityContext
*/
VelocityContext context = new VelocityContext();
context.put("radios", radioList);
ArrayList textList = new ArrayList();
map = new HashMap();
map.put("label", "FirstName");
map.put("value", "");
textList.add(map);
map = new HashMap();
map.put("label", "LastName");
map.put("value", "");
textList.add(map);
context.put("textfields", textList);
Template template = Velocity.getTemplate("form.vm");
StringWriter writer = new StringWriter();
template.merge(context, writer);
}
}
Build script (build.xml
)
<?xml version='1.0' encoding='UTF-8'?>
<project name="velocityTemplate" default="jar" basedir=".">
<property name='cls' location='${basedir}/classes'/>
<property name='dat' location='${basedir}/data'/>
<property name='gen' location='${basedir}/gen'/>
<property name='lib' location='${basedir}/lib'/>
<property name='src' location='${basedir}/src'/>
<property name='tmp' location='${basedir}/templates'/>
<path id='project.classpath'>
<pathelement location='${cls}'/>
<fileset dir='${lib}' includes='*.jar'/>
</path> <target name='clean' description='Clean.'>
<delete dir='${cls}'/>
<delete dir='${gen}'/>
</target>
<target name='comp' description='Compile the source.'>
<mkdir dir='${cls}'/>
<javac srcdir='${src}' destdir='${cls}' classpathref='project.classpath' fork='true'/>
</target>
<target name='jar' depends='comp' description='JAR the application.'>
<jar destfile='${ant.project.name}.jar' update='false' filesonly='true' index='true'>
<fileset dir='${cls}'/>
<fileset dir='${src}'/>
</jar>
</target>
<target name='run' depends='jar' description='Run the application.'>
<path id='velocityTemplate.classpath'>
<pathelement location='${ant.project.name}.jar'/>
<fileset dir='${lib}' includes='*.jar'/>
</path>
<taskdef classpathref='velocityTemplate.classpath'/>
<mkdir dir='${gen}'/>
<enumerator outputPath='${gen}' inputPath='${dat}' templateFile='${tmp}/form.vm'/>
</target>
<target name='form' description='Creates form'>
<path id='velocityTemplate.classpath'>
<pathelement location='${basedir}/velocityTemplate.jar'/>
<pathelement location='${lib}/velocity-dep-1.5.jar'/>
</path>
<taskdef classpathref='velocityTemplate.classpath'/>
<velocityTemplate outputPath='${basedir}/src' templateFile='${basedir}/form.vm'/>
</target>
</project>
If you just want to see the html being generated, you'll have to print out the value of the StringWriter or write it to a file.
Currently, unless there's code missing, you're just filling up the buffer.
Template template = Velocity.getTemplate("form.vm");
StringWriter writer = new StringWriter();
template.merge(context, writer);
template.merge(context, writer) just renders the template to the StringWriter object.
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