Frequently Asked Questions of the Trimou Core framework in the Java Class Library
Frequently Asked Questions of the Trimou Core framework
Trimou is a Java -based template engine, which provides a simple and powerful way to generate any text format output.You may encounter some common problems when using the Trimou Core framework.This article will answer some common questions about the Trimou Core framework and provide the corresponding Java code example.
Question 1: How to use the Trimou core framework in Java?
Answer: To use the Trimou core framework in Java, you need to introduce the dependencies of Trimou Core first.In the Maven project, you can add the following dependencies to your pom.xml file:
<dependency>
<groupId>org.trimou</groupId>
<artifactId>trimou-core</artifactId>
<version>2.9.0.Final</version>
</dependency>
Then, in your Java code, you can use the Trimou Core framework as follows:
import org.trimou.engine.MustacheEngine;
import org.trimou.engine.MustacheEngineBuilder;
import org.trimou.template.Template;
public class TrimouExample {
public static void main(String[] args) {
MustacheEngine engine = MustacheEngineBuilder.newBuilder().build();
Template template = engine.compileMustache("Hello {{name}}!");
String output = template.render("name", "Trimou");
System.out.println(output);
}
}
In this code, we first created a Mustachengine instance, and then used it to compile a Mustache template file.Finally, we fill the data into the template with a rendering engine and output the result to the console.
Question 2: How to use conditional statements in the Trimou Core framework?
Answer: When using the Trimou Core framework, you can implement conditional statements through #if and #else.In the Mustache template, you can write the following code:
mustache
{{#if condition}}
This is displayed if the condition is true.
{{else}}
This is displayed if the condition is false.
{{/if}}
In the Java code, you can set a context object before the render method to define the conditional variables used in the template:
import org.trimou.engine.MustacheEngine;
import org.trimou.engine.MustacheEngineBuilder;
import org.trimou.scope.MapTemplateContext;
public class TrimouExample {
public static void main(String[] args) {
MustacheEngine engine = MustacheEngineBuilder.newBuilder().build();
MapTemplateContext context = new MapTemplateContext();
context.set("condition", true);
engine.addMustacheLoader().addMustacheListener(context);
Template template = engine.compileMustache("template.mustache");
String output = template.render();
System.out.println(output);
}
}
In this example, we created a MapTemplateContext object before the template rendering.Then, we set the condition variables to true, and add the context object to the template rendering engine through the Addmustachelistener method.Finally, we compiled and rendered the template and output the result to the console.
Question 3: How to traverse the collection and display the results in the Trimou template?
Answer: To traverse the collection in the Trimou template and display the results in a specific format, you can use the #each command.The following is an example template code:
mustache
{{#each items}}
Item: {{this}}
{{else}}
No items found.
{{/each}}
In the Java code, you can add a collection as a variable to the context, and then render the template:
import org.trimou.engine.MustacheEngine;
import org.trimou.engine.MustacheEngineBuilder;
import org.trimou.scope.MapTemplateContext;
import java.util.ArrayList;
import java.util.List;
public class TrimouExample {
public static void main(String[] args) {
MustacheEngine engine = MustacheEngineBuilder.newBuilder().build();
MapTemplateContext context = new MapTemplateContext();
List<String> items = new ArrayList<>();
items.add("Item 1");
items.add("Item 2");
context.set("items", items);
engine.addMustacheLoader().addMustacheListener(context);
Template template = engine.compileMustache("template.mustache");
String output = template.render();
System.out.println(output);
}
}
In this example, we add a string list containing two elements as variables as variables to the context object and named it "Items".Then, we add the context to the rendering engine and render the template.
Question 4: How to call the custom Java method in the Trimou template?
Answer: By using the Trimou Core framework, you can call the custom Java method in the template.First of all, you need to create a Java class that implements the Trimou Helper interface, which defines a method that can be called in the template.The following is an example:
import org.trimou.engine.segment.HelperSegment;
import org.trimou.handlebars.Helper;
import org.trimou.handlebars.Options;
import org.trimou.handlebars.i18n.AbstractI18nHelper;
public class CustomHelper implements Helper {
@Override
public void execute(Options options) {
String argument = options.getParameters().get(0);
// Perform custom method logic here
}
}
Then you can call this custom Java method in the Mustache template:
mustache
{{customHelper "argument"}}
In the Java code, you need to create a Mustachengine instance and add the custom Helper class to the rendering engine.
import org.trimou.engine.MustacheEngine;
import org.trimou.engine.MustacheEngineBuilder;
import org.trimou.scope.MapTemplateContext;
public class TrimouExample {
public static void main(String[] args) {
MustacheEngine engine = MustacheEngineBuilder.newBuilder()
.registerHelpers(new CustomHelper())
.build();
MapTemplateContext context = new MapTemplateContext();
engine.addMustacheLoader().addMustacheListener(context);
Template template = engine.compileMustache("template.mustache");
String output = template.render();
System.out.println(output);
}
}
In this example, we created a Trimouexample class and registered the Customhelper class into Mustachengine.We compiled and rendered the template and output the results to the console.
These are some common questions when using the Trimou Core framework.Hope this article will help you!
