Iterate Map Velocity Template
Iterate map object in velocity template is same as we iterate map in java. To make it more clear I will create List and put map inside it and iterate in template using small project:
- Maven project structure:
- 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/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.javahonk</groupId> <artifactId>SendEmailVelocityTemplate</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>SendEmailVelocityTemplate Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>javax.mail</groupId> <artifactId>mail</artifactId> <version>1.4</version> </dependency> <dependency> <groupId>org.apache.velocity</groupId> <artifactId>velocity</artifactId> <version>1.7</version> </dependency> </dependencies> <build> <finalName>SendEmailVelocityTemplate</finalName> </build> </project>
- SampleRenderMap.vm
<HTML>
<BODY>
<table border="1" style="width:20%">
#foreach( $data in $bar )
#foreach( $mapEntry in $data.entrySet() )
<tr>
<td>
Key: $mapEntry.key
</td>
<td>
Value: $mapEntry.value
</td>
</tr>
#end
#end
</table>- IterateMapVelocityTemplate.java:
package com.javahonk;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.VelocityEngine;
public class IterateMapVelocityTemplate {
public static void main(String[] args) {
VelocityEngine ve = new VelocityEngine();
ve.init();
Template t = ve.getTemplate("./src/main/resources/templates/SampleRenderMap.vm");
VelocityContext vc = new VelocityContext();
List<Map<String, Object>> bar = new ArrayList<Map<String, Object>>();
Map<String, Object> data = new HashMap<String, Object>();
data.put("Test", "Value1");
data.put("Tes2", "Value2");
bar.add(data);
vc.put("bar", bar);
StringWriter sw = new StringWriter();
t.merge(vc, sw);
System.out.println(sw);
}
}
- Output:
- For more details on Apache Velocity please read it official tutorial here
Download project: SendEmailVelocityTemplate
