使用VelocityEngine模板引擎生成HTML
参考 velocity模板加载的三种形式 Java使用 VelocityEngine模板引擎快速生成HTML等各种代码
1.依赖jar包
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity</artifactId>
<version>1.7</version>
</dependency>2.准备PersonTemplet.vm文件
<html>
<head>
<title>
Personnel information
</title>
</head>
<body>
Dear :<br>
<br>
Please notify that Personnel information for $name <br>
name: $name <br>
age: $age <br>
<br>
Best Regards <br>
</body>
</html>3.使用VelocityEngine模板引擎快速HTML
import java.io.StringWriter;
import java.util.Map;
import java.util.Properties;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;
import org.apache.velocity.app.VelocityEngine;
public class MailContentVelocityRender {
public static String render(Map<String, Object> context, String templateName) {
Properties properties = new Properties();
//从类路径加载模板文件 设置velocity资源加载方式为class
properties.setProperty("resource.loader", "class");
//设置velocity资源加载方式为class时的处理类
properties.setProperty("class.resource.loader.class","org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
properties.setProperty(Velocity.ENCODING_DEFAULT, "UTF-8");
properties.setProperty(Velocity.INPUT_ENCODING, "UTF-8");
properties.setProperty(Velocity.OUTPUT_ENCODING, "UTF-8");
properties.setProperty(Velocity.RUNTIME_LOG_LOGSYSTEM_CLASS, "org.apache.velocity.runtime.log.NullLogChute");
//实例化一个VelocityEngine对象
VelocityEngine velocityEngine = new VelocityEngine(properties);
velocityEngine.init();
//根据template路径 实例化一个Template对象
Template template = velocityEngine.getTemplate(templateName);
//实例化一个VelocityContext对象 这个对象中存放要在邮件中显示的参数
VelocityContext velocityContext = new VelocityContext(context);
//velocityContext.put("age", 22);//也可以向VelocityContext中放入键值
//实例化一个StringWrite
StringWriter stringWriter = new StringWriter();
template.merge(velocityContext, stringWriter);
return stringWriter.toString();
}
}
4.测试
import java.util.HashMap;
import java.util.Map;
public class App
{
public static void main( String[] args )
{
//准备邮件中参数
Map<String, Object> emailMap = new HashMap<String, Object>();
emailMap.put("name", "zhangsan");
emailMap.put("age", "23");
//模板所在路径+名称
String str = MailContentVelocityRender.render(emailMap, "PersonTemplet.vm");
System.out.println(str);
}
}
控制台输出如下
如果报错
ResourceManager : unable to find resource 'Hellovelocity.vm' in any resource loader.
Exception in thread "main" org.apache.velocity.exception.ResourceNotFoundException: Unable to find resource 'Hellovelocity.vm'
要把PersonTemplet.vm所在的文件夹 右键文件夹 build path ----use as source folder
