VelocityEngineUtils已经在Spring 3.2中删除了,还有什么用？

Question

今天我将整个Spring Web应用程序从Spring升级3.1.1到Spring 3.2.

我现有的应用程序的大部分内容都不会破​​坏,除了在Spring 3.2中

org.springframework.ui.velocity.VelocityEngineUtils

class似乎完全从spring-context-3.2.0.RELEASE.jar中删除.

我在此网址中找到了迁移指南.

它表示org.springframework.ui.velocity.VelocityEngineUtils该类已被弃用,但实际上它已被完全删除.

也许我只是错了,我想知道VelocityEngineUtils类是否仍然存在于某个地方或者如果没有,我可以使用的替代类是什么.

编辑:似乎整个速度包已从Spring中删除,3.2所以现在甚至 org.springframework.ui.velocity.VelocityEngineFactoryBean不存在.春天是否会离开Velocity？

Answer 1

我想补充一个完整的答案.

首先,添加依赖项:

    <dependency>
        <groupId>org.apache.velocity</groupId>
        <artifactId>velocity</artifactId>
        <version>1.6.4</version>
    </dependency>

然后,如果你有这样的习惯VelocityEngineFactory;

@Bean
public VelocityEngineFactory velocityEngine(){
    VelocityEngineFactoryBean bean = new VelocityEngineFactoryBean();
    Properties properties = new Properties();
    properties.setProperty("input.encoding", "UTF-8");
    properties.setProperty("output.encoding", "UTF-8");
    properties.setProperty("resource.loader", "class");
    properties.setProperty("class.resource.loader.class", "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
    bean.setVelocityProperties(properties);
    return bean;
}

你需要用bean定义替换它,如下所示(对你的@Configuration类);

@Bean
public VelocityEngine velocityEngine() throws Exception {
    Properties properties = new Properties();
    properties.setProperty("input.encoding", "UTF-8");
    properties.setProperty("output.encoding", "UTF-8");
    properties.setProperty("resource.loader", "class");
    properties.setProperty("class.resource.loader.class", "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
    VelocityEngine velocityEngine = new VelocityEngine(properties);
    return velocityEngine;
}

最后,将其用作:

@Autowired
private VelocityEngine velocityEngine;

public String prepareRegistrationEmailText(User user) {
    VelocityContext context = new VelocityContext();
    context.put("username", user.getUsername());
    context.put("email", user.getEmail());
    StringWriter stringWriter = new StringWriter();
    velocityEngine.mergeTemplate("registration.vm", "UTF-8", context, stringWriter);
    String text = stringWriter.toString();
    return text;
}

祝好运.

Answer 2

关于在Spring中对VelocityEngineUtils的弃用,Spring文档对于使用什么不是很清楚.

它只是说:

已过时.使用mergeTemplateIntoString(VelocityEngine,String,String,Map),遵循Velocity 1.6在其自己的API中相应的弃用.

为了使其更加混乱,链接返回自身.

基本上它只是说使用Velocity本身.

这是对你如何做的描述..

 // instead of a model map, you use a VelocityContext

 VelocityContext velocityContext = new VelocityContext();
 velocityContext.put("key1", value1);
 velocityContext.put("key2", value2);

 // the velocityEngine you wired into Spring has a mergeTemplate function
 // you can use to do the same thing as VelocityEngineUtils.mergeTemplate
 // with the exception that it uses a writer instead of returning a String      

 StringWriter stringWriter = new StringWriter();
 velocityEngine.mergeTemplate("templateName.vm", "UTF-8", velocityContext, stringWriter);

 // this is assuming you're sending HTML email using MimeMessageHelper

 message.setText(stringWriter.toString(), true);

Answer 3

根据GitHub的说法,我不认为VelocityEngineUtils是在spring-contextjar中(至少自从Spring上次发布3.1.x以来).

无论如何,你可以找到它 spring-context-support-3.2.0.RELEASE.jar