Thymeleaf 添加 baseUrl 指定根路径

转载自 www.youngboy.vip

原理

修改@{}对应的处理类StandardLinkBuilder重写computeContextPath方法

修改步骤

step1: 重写 StandardLinkBuilder

public static class BaseUrlLinkBuilder extends StandardLinkBuilder {

        private String baseUrl;

        public void setBaseUrl(String baseUrl) {
            this.baseUrl = baseUrl;
        }

        @Override
        protected String computeContextPath(IExpressionContext context, String base, Map<String, Object> parameters) {

            if(baseUrl==null){
                throw new TemplateProcessingException("baseUrl 不能为空");
            }

            return baseUrl;
        }
    }

step2: 把BaseUrlLinkBuilder注入模板引擎中

@Bean
    public BaseUrlLinkBuilder baseUrlLinkBuilder(TemplateEngine templateEngine){
        BaseUrlLinkBuilder baseUrlLinkBuilder = new BaseUrlLinkBuilder();
        baseUrlLinkBuilder.setBaseUrl("http://www.youngboy.vip");
        templateEngine.setLinkBuilder(baseUrlLinkBuilder);
        return baseUrlLinkBuilder;
    }

全部代码 方便 copy

@Configuration
public class BaseURLConfig {

    @Bean
    public BaseUrlLinkBuilder baseUrlLinkBuilder(TemplateEngine templateEngine){
        BaseUrlLinkBuilder baseUrlLinkBuilder = new BaseUrlLinkBuilder();
        baseUrlLinkBuilder.setBaseUrl("http://wechat1.youngboy.vip/proxy");
        templateEngine.setLinkBuilder(baseUrlLinkBuilder);
        return baseUrlLinkBuilder;
    }

    public static class BaseUrlLinkBuilder extends StandardLinkBuilder {

        private String baseUrl;

        public void setBaseUrl(String baseUrl) {
            this.baseUrl = baseUrl;
        }

        @Override
        protected String computeContextPath(IExpressionContext context, String base, Map<String, Object> parameters) {
            if (!(context instanceof IWebContext)) {
                throw new TemplateProcessingException(
                        "Link base \"" + base + "\" cannot be context relative (/...) unless the context " +
                                "used for executing the engine implements the " + IWebContext.class.getName() + " interface");
            }

            if(baseUrl==null){
                throw new TemplateProcessingException("baseUrl 不能为空");
            }

            return baseUrl;
        }
    }

}