Java freemarker + spring 配置和最简单的例子
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freemarker + spring configuration and simplest example
提问by Mykhaylo Adamovych
Despite there are a lot of discussion around freemarker + spring but it is hard to find neat working example to copy and run.
Could you please provide simplest working configuration of freemarker in spring xml context and java code snippet to load template from resource file and process it.
尽管有很多关于 freemarker + spring 的讨论，但很难找到简洁的工作示例来复制和运行。
您能否在 spring xml 上下文和 java 代码片段中提供最简单的 freemarker 工作配置，以从资源文件加载模板并对其进行处理。
采纳答案by Mykhaylo Adamovych
pom.xml
pom.xml
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
</dependency>
<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker</artifactId>
</dependency>
applicationContext.xml
应用上下文.xml
<bean id="freeMarkerConfigurationFactory" class="org.springframework.ui.freemarker.FreeMarkerConfigurationFactoryBean">
<property name="templateLoaderPath" value="classpath:/META-INF/freemarker"/>
<property name="preferFileSystemAccess" value="false"/>
</bean>
AlertMailComposer.java
AlertMailComposer.java
import static org.springframework.ui.freemarker.FreeMarkerTemplateUtils.processTemplateIntoString;
@Component
public class AlertMailComposer implements Processor {
public static final String TEMPLATE = "AlertMail.ftl";
@Autowired
private Configuration freemarkerConfiguration;
protected String composeHtml(Alert alert) throws IOException, TemplateException {
return processTemplateIntoString(freemarkerConfiguration.getTemplate(TEMPLATE), ImmutableMap.of(
"alertType", alert.getAlertType(),
"message", alert.getMessage(),
"nodeName", alert.getEvent().getNodeName(),
"event", toJson(alert.getEvent(), true)
));
}
...
AlertMail.ftl
警报邮件.ftl
<html>
<body style="font-family:verdana;font-size:10">
<b>${alertType}: </b>${message}<br>
<b>on: </b>${nodeName}<br>
<p/>
<pre style="font-family:verdana;font-size:10;color:grey">
${event}
</pre>
</body>
</html>
回答by lfo
In the spring context xml, declaring FreemarkerConfigurationFactoryBeanis sufficient, i.e.
在spring上下文xml中，声明FreemarkerConfigurationFactoryBean就足够了，即
<bean id="freemarkerConfigFactory" class="org.springframework.ui.freemarker.FreeMarkerConfigurationFactoryBean">
<property name="templateLoaderPath" value="classpath:templates/"/>
</bean>
No need to further specify freemarker.template.Configurationbean in the xml file if you use @Autowiredannotation. It is created by the factory and injected by Spring.
freemarker.template.Configuration如果使用@Autowired注解，则无需在 xml 文件中进一步指定bean 。它由工厂创建并由 Spring 注入。
回答by Aniket Thakur
Other than maven dependency in pom.xml to use it with java configuration in spring you can do -
除了 pom.xml 中的 maven 依赖以在 spring 中将其与 java 配置一起使用，您还可以执行以下操作：
public class MyWebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
@Override
protected Class<?>[] getRootConfigClasses() {
return new Class<?>[] { MyRootContextConfig.class };
}
@Override
protected Class<?>[] getServletConfigClasses() {
return new Class<?>[] { MyServletContextConfig.class };
}
@Override
protected String[] getServletMappings() {
return new String[] { "/test/*" };
}
}
and then MyRootContextConfigcan have
然后MyRootContextConfig可以有
@Bean(name = "myFreeMarkerConfigruation")
public FreeMarkerConfigurationFactoryBean getFreeMarkerConfiguration() {
FreeMarkerConfigurationFactoryBean bean = new FreeMarkerConfigurationFactoryBean();
bean.setTemplateLoaderPath("classpath:/templates/");
return bean;
}
