FreeMarker注入静态方法，以及在IDEA中获取代码编写提示
前言
- springbootWeb项目
- 项目中引入的Hutool5.8.x版本工具类。
FreeMarker注入全局变量
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| @Slf4j
public class FreemarkerConfig {
public static void init() {
Configuration c = SpringUtil.getBean(Configuration.class);
BeansWrapperBuilder beansWrapperBuilder = new BeansWrapperBuilder(c.getIncompatibleImprovements());
BeansWrapper wrapper = beansWrapperBuilder.build();
TemplateHashModel staticModels = wrapper.getStaticModels();
try {
TemplateHashModel dateUtil = (TemplateHashModel) staticModels.get(DateUtil.class.getName());
c.setSharedVariable("dateUtil", dateUtil);
c.setNumberFormat("#.########");
c.setCustomNumberFormats(MapUtil.of("amt", AmtTemplateNumberFormatFactory.INSTANCE));
c.setDateTimeFormat(DatePattern.NORM_DATETIME_PATTERN);
c.setDateFormat(DatePattern.NORM_DATE_PATTERN);
c.setTimeFormat(DatePattern.NORM_TIME_PATTERN);
c.setTemplateExceptionHandler(TemplateExceptionHandler.IGNORE_HANDLER);
} catch (Exception e) {
log.error("FreeMarker全局变量注入失败!", e);
}
}
}
|
自定义数字格式化
AmtTemplateNumberFormatFactory.java
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| public class AmtTemplateNumberFormatFactory extends TemplateNumberFormatFactory {
public static final AmtTemplateNumberFormatFactory INSTANCE
= new AmtTemplateNumberFormatFactory();
private AmtTemplateNumberFormatFactory() {
}
@Override
public TemplateNumberFormat get(String params, Locale locale, Environment env)
throws InvalidFormatParametersException {
TemplateFormatUtil.checkHasNoParameters(params);
return HexTemplateNumberFormat.INSTANCE;
}
private static class HexTemplateNumberFormat extends TemplateNumberFormat {
private static final HexTemplateNumberFormat INSTANCE = new HexTemplateNumberFormat();
private HexTemplateNumberFormat() {
}
@Override
public String formatToPlainText(TemplateNumberModel numberModel)
throws UnformattableValueException, TemplateModelException {
Number n = TemplateFormatUtil.getNonNullNumber(numberModel);
try {
return cn.hutool.core.util.NumberUtil.decimalFormat("#.00####", n);
} catch (ArithmeticException e) {
throw new UnformattableValueException(n + " 不适合金额");
}
}
@Override
public boolean isLocaleBound() {
return false;
}
@Override
public String getDescription() {
return "金额格式化";
}
}
}
|
IDEA中获取代码编写提示
在templates文件夹下新建freemarker_implicit.ftl文件
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| [#ftl]
[#-- @implicitly included --]
[#-- @ftlvariable name="dateUtil" type="cn.hutool.core.date.DateUtil.static" --]
[#--说明，此文件主要用于IDEA代码提示，存在或不存在不影响实际功能--]
|
新建项目启动后执行钩子让配置生效
新建PostRunner.java文件
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@Component
public class PostRunner implements CommandLineRunner {
@Override
public void run(String... args) {
FreemarkerConfig.init();
}
}
|
