我有一个 Spring Boot 应用程序,它用作 OAuth2 客户端。
我使用 Thymeleaf 3 作为模板引擎。这些是我的 build.gradle 中与 Thymeleaf 3 相关的依赖项。
compile('org.thymeleaf:thymeleaf:3.0.1.RELEASE')
compile('org.thymeleaf:thymeleaf-spring4:3.0.1.RELEASE')
compile('nz.net.ultraq.thymeleaf:thymeleaf-layout-dialect:2.0.4')
compile('org.thymeleaf.extras:thymeleaf-extras-springsecurity4:3.0.1.RELEASE')
如果我像这样引用依赖项没有什么区别:
ext["thymeleaf.version"] = "3.0.2.RELEASE"
ext["thymeleaf-layout-dialect.version"] = "2.1.1"
dependencies {
compile('org.springframework.boot:spring-boot-starter-thymeleaf')
}
我希望能够使用 Thymeleaf 3 的 HTML 和 Javascript 模板模式。 HTML 模式可以工作,但在 javascript 模式下,messageSource 无法正常工作。
这是我的 WebMvcConfiguration 类:
@Configuration
public class WebMVCConfig extends WebMvcConfigurerAdapter implements ApplicationContextAware {
private static final String CHARACTER_ENCODING = "UTF-8";
private ApplicationContext applicationContext;
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
this.applicationContext = applicationContext;
}
@Bean
public ViewResolver htmlViewResolver() {
ThymeleafViewResolver resolver = new ThymeleafViewResolver();
resolver.setTemplateEngine(templateEngine(htmlTemplateResolver()));
resolver.setContentType("text/html");
resolver.setCharacterEncoding(CHARACTER_ENCODING);
resolver.setViewNames(new String[] {"*.html"});
return resolver;
}
@Bean
public ViewResolver javascriptViewResolver() {
ThymeleafViewResolver resolver = new ThymeleafViewResolver();
resolver.setTemplateEngine(templateEngine(javascriptTemplateResolver()));
resolver.setContentType("application/javascript");
resolver.setCharacterEncoding(CHARACTER_ENCODING);
resolver.setViewNames(new String[] {"*.js"});
return resolver;
}
private TemplateEngine templateEngine(ITemplateResolver templateResolver) {
SpringTemplateEngine engine = new SpringTemplateEngine();
engine.setTemplateResolver(templateResolver);
return engine;
}
private ITemplateResolver htmlTemplateResolver() {
SpringResourceTemplateResolver resolver = new SpringResourceTemplateResolver();
resolver.setApplicationContext(applicationContext);
resolver.setPrefix("templates/");
resolver.setCacheable(false);
resolver.setTemplateMode(TemplateMode.HTML);
resolver.setSuffix(".html");
return resolver;
}
public ITemplateResolver javascriptTemplateResolver() {
SpringResourceTemplateResolver resolver = new SpringResourceTemplateResolver();
resolver.setApplicationContext(applicationContext);
resolver.setPrefix("classpath:/static/js/");
resolver.setCacheable(false);
resolver.setTemplateMode(TemplateMode.JAVASCRIPT);
// resolver.setSuffix(".js");
return resolver;
}
}
请注意,我必须在 javascriptTemplateResolver 中使用“classpath:/static/js/”,因为当我仅使用“static/js/”时,出现以下异常:
java.io.FileNotFoundException: Could not open ServletContext resource [/static/js/headerconfig.js]
此外,我还必须注释掉 setSuffix,因为使用它我会得到以下异常:
java.io.FileNotFoundException: class path resource [static/js/typeutils.js.js] cannot be opened because it does not exist
我认为这已经表明了主要问题,但我无法弄清楚可能导致它的原因。
<小时/>我有一个用于处理 JavaScript 模板的 Controller :
@Controller
public class JavascriptController {
@RequestMapping(method = RequestMethod.GET, value = "/js/{template}.js")
public String jsMapping(@PathVariable("template") String template, Model model) {
model.addAttribute("myAttribute", "Attribute works!");
return template;
}
}
我的 messages.properties 文件位于
- src/main/resources/messages.properties
- src/main/resources/messages_hu.properties
我在 src/main/resources/templates/文件夹中有一个 HTML 文件,它引用了一个 javascript 文件,如下所示:
<script th:src="@{js/typeutils.js}"></script>
引用的javascript文件(js/typeutils.js):
var a = [[${myAttribute}]];
var b = [[#{test}]];
console.log(a);
console.log(b);
当我运行应用程序并检查 JavaScript 控制台时,打印出以下内容:
Attribute works!
??test_hu_HU??
因此模型属性已成功传递到 JavaScript 文件,并且已检测到本地化,但未找到“test”消息。 看起来 javascript 模板模式的行为与 HTML 模板模式完全不同。
应该如何修复 javascript 模板模式配置才能使其也处理 messages.properties 文件?
谢谢!
最佳答案
我找到了解决方案(通过查看 thymeleaf 源代码),这可能并不完美,但它有效!
与 example 不同由 Baeldung 提供,以下内容为我解决了问题:
@Configuration
public class WebMVCConfig implements WebMvcConfigurer, ApplicationContextAware {
private static final String CHARACTER_ENCODING = "UTF-8";
private ApplicationContext applicationContext;
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
this.applicationContext = applicationContext;
}
@Bean
public ViewResolver htmlViewResolver() {
ThymeleafViewResolver resolver = new ThymeleafViewResolver();
resolver.setTemplateEngine(templateEngine());
resolver.setContentType("text/html");
resolver.setCharacterEncoding(CHARACTER_ENCODING);
resolver.setViewNames(new String[] { "*.html" });
return resolver;
}
@Bean
public ViewResolver javascriptViewResolver() {
ThymeleafViewResolver resolver = new ThymeleafViewResolver();
resolver.setTemplateEngine(templateEngine());
resolver.setContentType("application/javascript");
resolver.setCharacterEncoding(CHARACTER_ENCODING);
resolver.setViewNames(new String[] { "*.js" });
return resolver;
}
@Bean
public SpringTemplateEngine templateEngine() {
SpringTemplateEngine engine = new SpringTemplateEngine();
engine.setMessageSource(messageSource());
engine.addTemplateResolver(htmlTemplateResolver());
engine.addTemplateResolver(javascriptTemplateResolver());
return engine;
}
private ITemplateResolver htmlTemplateResolver() {
SpringResourceTemplateResolver resolver = new SpringResourceTemplateResolver();
resolver.setOrder(0);
resolver.setCheckExistence(true);
resolver.setApplicationContext(applicationContext);
resolver.setPrefix("classpath:templates/");
resolver.setCacheable(false);
resolver.setTemplateMode(TemplateMode.HTML);
resolver.setSuffix(".html");
return resolver;
}
public ITemplateResolver javascriptTemplateResolver() {
SpringResourceTemplateResolver resolver = new SpringResourceTemplateResolver();
resolver.setApplicationContext(applicationContext);
resolver.setOrder(1);
resolver.setCheckExistence(true);
resolver.setPrefix("classpath:/static/js/");
resolver.setCacheable(false);
resolver.setTemplateMode(TemplateMode.JAVASCRIPT);
return resolver;
}
@Bean
public MessageSource messageSource() {
ResourceBundleMessageSource msgSource = new ResourceBundleMessageSource();
msgSource.setAlwaysUseMessageFormat(false);
msgSource.setBasename("messages");
msgSource.setDefaultEncoding(CHARACTER_ENCODING);
msgSource.setFallbackToSystemLocale(true);
msgSource.setUseCodeAsDefaultMessage(false);
return msgSource;
}
}
基本上,我们将 templateEngine 设置为一个 bean,以便我们覆盖 ThymeleafDefaultConfiguration 的默认 templateEngine 实现 bean。这意味着每次需要解析模板时,肯定会使用相同的 templateEngine。
我们将 htmlTemplateResolver 的顺序设置为 0,将 javascriptTemplateResolver 的顺序设置为 1,这样我们将首先尝试在 HTML 模板模式下解析每个模板,然后在 Javascript 模式下解析。
同样重要的是,我们将 SpringResourceTemplateResolvers 的 checkExistence 标志设置为 true,因为这样如果找不到模板,我们将尝试使用下一个 TemplateResolver。
此解决方案有一个缺点,即我们将首先尝试在 HTML 模式下解析不必要的 javascript 模板,然后在 JAVASCRIPT 模式下解析,因此在解析 javascript 资源时需要一个额外的步骤。
我会尝试更好地解决问题,但目前,这对我有用。
关于java - Spring Boot Thymeleaf 3 外部 javascript 模板配置,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/46139263/